SHORT PULSE LONG PULSE STAYS TURNS INTERRUPT INTERRUPT 2954 TD01b

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SHORT PULSE LONG PULSE STAYS TURNS INTERRUPT INTERRUPT 2954 TD01b

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LTC2954 Push Button On/Off Controller with Interrupt
SHORT PULSE LONG PULSE STAYS TURNS INTERRUPT INTERRUPT
2954 TD01b 2954 TA01
DESCRIPTIO
Adjustable Power On/Off Timers Supply Current: Wide Operating Voltage Range: 2.7V 26.4V Leakage Output (LTC2954-1) Allows DC/DC Converter Control High Voltage Output (LTC2954-2) Allows Circuit Breaker Control Simple Interface Allows Graceful Shut Down High Input Voltage with Internal Pull Resistor ±10kV Input Accurate 0.6V Threshold KILL Comparator Input 8-Pin ThinSOTPackages
LTC2954 push button On/Off controller that manages system power push button interface. enable output toggles system power while interrupt output provides debounced push button status. interrupt output used menu driven applications request system power down. power kill input allows microprocessor system reset enable output, effectively powering down system. Independently adjustable timers allow dependable push button control enable output resistance accidental toggling system power. LTC2954 operates over wide 2.7V 26.4V input voltage range accommodate wide variety input power supplies. Very quiescent current (6µA typical) makes LTC2954 ideally suited battery powered applications. versions part available accommodate either positive negative enable polarities.
Lare registered trademarks Linear Technology Corporation. ThinSOT trademark Linear Technology Corporation. other trademarks property their respective owners.
APPLICATIO
Push Button Power Path Control Portable Instrumentation Meters Blade Servers Portable Customer Service Desktop Notebook Computers
100k
LTC2954-2
KILL
tPDT SECONDS
TYPICAL APPLICATIO
Push Button On/Off with Interrupt
VOUT DC/DC 100k TURN PULSE
KILL µP/µC
TURNS
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LTC2954
(Note
Supply Voltage (VIN) 0.3V Input Voltages 0.3V 2.7V PDT.- 0.3V 2.7V KILL 0.3V Output Voltages 0.3V EN/EN 0.3V
VIEW EN/EN KILL VIEW KILL EN/EN
PACKAGE 8-LEAD (3mm 2mm) PLASTIC TJMAX 125°C, 165°C/W EXPOSED (PIN UNCONNECTED
ORDER PART NUMBER LTC2954CDDB-1 LTC2954CDDB-2 LTC2954IDDB-1 LTC2954IDDB-2
PART MARKING* LCJG LCNJ LCJG LCNJ
Order Options Tape Reel: Lead Free: #PBF Lead Free Tape Reel: #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult Marketing parts specified with wider operating temperature ranges. *The temperature grade identified label shipping container.
ELECTRICAL CHARACTERISTICS
SYMBOL VUVL VUVL(HYST) PARAMETER Supply Voltage Range Supply Current Undervoltage Lockout Undervoltage Lockout Hysteresis Voltage Range
denotes specifications which apply over full operating temperature range, otherwise specifications 25°C. 2.7V 26.4V, unless otherwise noted. (Note
CONDITIONS Steady State Operation System Power 2.7V Falling
Push Button, Enable (PB, EN/EN)) VPB(MIN, MAX) Single-Ended
PACKAGE/ORDER ATIO
ABSOLUTE
RATI
Operating Temperature Range LTC2954C-1 70°C LTC2954C-2 70°C LTC2954I-1 40°C 85°C LTC2954I-2 40°C 85°C Storage Temperature Range Package. 65°C 125°C TSOT-23. 65°C 150°C Lead Temperature (Soldering, sec) 300°C
PACKAGE 8-LEAD PLASTIC TSOT-23 TJMAX 125°C, 140°C/W
ORDER PART NUMBER LTC2954CTS8-1 LTC2954CTS8-2 LTC2954ITS8-1 LTC2954ITS8-2
PART MARKING* LTCJH LTCNK LTCJH LTCNK
26.4
UNITS
26.4
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LTC2954 ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER Input Current
denotes specifications which apply over full operating temperature range, otherwise specifications 25°C. 2.7V 26.4V, unless otherwise noted. (Note
CONDITIONS 2.5V 26.4V 0.6V Falling -1µA Enable Released Enable Asserted VEN/ Sink Current VEN/ 26.4V, Sink Current IEN/ 500µA VONT VONT 1.3V Float, Falling Enable Asserted
±0.1
UNITS
VPB(VTH) VPB(VOC) tEN, Lock IEN(LKG) VEN(VOL) IONT(PU) IONT(PD) tDB, tONT
Input Threshold Open Circuit Voltage EN/EN Lock Time (Note EN/EN Leakage Current EN/EN Voltage Output Pull Current Pull Down Current Internal Turn Debounce Time
0.11 -2.4 -2.4 11.5 11.5 43.5
-3.6 13.5 -3.6 13.5 54.5
Power Timing (ONT)
Additional Adjustable Turn Time CONT 1500pF Power Down Timing (PDT) IPDT(PU) IPDT(PD) tDB, tPD, tPDT INT, INT, IINT(LKG) VINT(VOL) VKILL(TH) VKILL(HYST) IKILL(LKG) KILL(PW) KILL(PD) KILL, Blank Pull Current Pull Down Current Turn Interrupt Debounce Time Internal Power Down DebounceTime (Note Additional Adjustable Power Down Debounce Time Minimum Pulse Width Maximum Pulse Width Leakage Current Output Voltage KILL Input Threshold Voltage KILL Input Threshold Hysteresis KILL Leakage Current KILL Minimum Pulse Width KILL Propagation Delay KILL Turn Blanking (Note KILL Falling Enable Released KILL Low, Enable Asserted Enable Released KILL 0.6V VPDT VPDT 1.3V Falling Falling Float, Falling Enable Released CPDT 1500pF Asserted Released CPDT 1500pF, Asserted Released KILL Falling
Handshake Pins (INT, KILL)
0.11 0.57
0.63 ±0.1
Note Stresses beyond those listed under Absolute Maximum Ratings cause permanent damage device. Exposure Absolute Maximum Rating condition extended periods affect device reliability lifetime. Note currents into pins positive; voltages referenced unless otherwise noted. Note KILL turn blanking timer period waiting period immediately after enable output asserted. This blanking time allows sufficient time DC/DC converter perform power tasks. KILL inputs ignored during this period. KILL remains
this time period, enable output released, thus turning system power. This time delay does include tDB, tONT. Note manually force immediate release EN/EN pin, push button input must held least tPD,Min (internal default power down timer) tPDT (adjustable placing external capacitor pin). Note enable lock time designed allow application properly power down such that next power sequence starts from consistent powered down configuration. ignored during this lock time. This time delay does include tDB, tONT.
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LTC2954 TYPICAL PERFOR CHARACTERISTICS
Supply Current Temperature
26.4V 3.3V 2.7V IVIN (µA) 85°C -40°C tDB, (ms) 25°C
IVIN (µA)
TEMPERATURE (°C)
10000
Turn Debounce Time (tDB, tONT) External Capacitance
25°C 3.3V PULL-UP CURRENT (µA)
tDB, tONT (ms)
1000
tDB, (ms)
EXTERNAL CAPACITANCE (nF)
Internal Default Power Down Debounce Time (tPD, Min)
tPD, (ms)
2954
PULL-UP CURRENT (µA)
25°C tPD, tPDT (ms) 1000
2954 2954
Supply Current Supply Voltage
Internal Default Turn Debounce Time (tDB,
25°C
2954
2954
Pull-Up Current Temperature
-3.4
Turn Debounce Time (tDB, OFF)
25°C
-3.2 26.4V -3.0 2.7V -2.8
1000
-2.6
TEMPERATURE (°C)
2954
2954
Power Down Debounce Time (tPD, tPDT) External Capacitance
10000 25°C 3.3V -3.4
Pull-Up Current Temperature
-3.2 26.4V -3.0 2.7V -2.8
EXTERNAL CAPACITANCE (nF)
1000
-2.6
TEMPERATURE (°C)
2954
2954
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LTC2954 TYPICAL PERFOR CHARACTERISTICS
-250
Current Voltage
25°C 3.3V
-200 VOLTAGE (mV) CURRENT (µA)
-150
-100
EN/EN VOLTAGE (mV)
EN/EN Current Load
25°C 3.3V
EN/EN CURRENT LOAD (mA)
2954
Voltage External Resistance Ground
3.3V
100°C 25°C -45°C
VOLTAGE
EXTERNAL RESISTANCE GROUND
2954
2954
(LTC2954-1) Voltage
25°C 100k PULL-UP FROM
(LTC2954-2) Voltage
25°C 100k PULL-UP FROM
2954
2954
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LTC2954 CTIO
(TSOT-23/DFN) released KILL driven high within 512ms initial valid power turn-on event, KILL driven during normal operation, pressed held (tPD, tPDT) during normal operation. operating range this leakage 26.4V. (LTC2954-2, 6/Pin Open Drain Enable Output. This intended enable system power. asserted after valid turn-on event (tDB, tONT). releases high KILL driven high within 512ms initial valid power turn-on event, KILL driven during normal operation, pressed held (tPD, tPDT) during normal operation. operating range this 26.4V. (Pin 7/Pin Power Down Time Input. capacitor ground determines additional time (6.4 seconds/µF) that push button must held before immediately releasing EN/EN outputs. Floating this results push button power down time 64ms. KILL (Pin 8/Pin Kill Input. Forcing KILL releases enable output. During system turn this blanked 512ms internal timer (tKILL, BLANK) allow system pull KILL high. This accurate 0.6V threshold used voltage monitor input. Exposed (Pin Only): Exposed left open connected device ground. (Pin 1/Pin Power Supply Input: 2.7V 26.4V. (Pin 2/Pin Push Button Input. Connecting ground through momentary switch provides On/Off control EN/EN outputs. internal 100k pull-up resistor connects internal 1.9V bias voltage. rugged input withstands ±10kV pulled 26.4V externally without consuming extra current. (Pin 3/Pin Turn Time Input. Placing external capacitor ground determines additional time (6.4 seconds/µF) must held before enable output asserted. Floating this results default turn debounce time 32ms. (Pin 4/Pin Device Ground. (Pin 5/Pin Open Drain Interrupt Output. After push button turn event detected (tDB,OFF), LTC2954 interrupts system (µP) asserting low. would perform power down housekeeping tasks then assert KILL low, thus releasing enable output. pulse width minimum 32ms stays long asserted. asserted longer than tPD,Min tPDT, EN/EN outputs immediately released. (LTC2954-1, 6/Pin Open Drain Enable Output. This intended enable system power. asserted high after valid turn event (tDB,ON tONT).
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LTC2954
HIGH VOLTAGE 2.7V 26.4V 1.5k ZENER REGULATOR 2.4V (-1) (-2) OSCILLATOR LOGIC 10µS FILTER 0.8V OSCILLATOR DEBOUNCE 0.6V KILL
2954
BLOCK DIAGRA
2.4V
100k
DIAGRA
tKILL(PW) KILL
tKILL(PD) EN/EN
2954 TD01
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LTC2954 DIAGRA
tDB, tONT
(LTC2954-1)
2954 TD02
tDB,
tINT,
tDB,
tINT, (LTC2954-1)
2954 TD04
Forced Off, Power Down Timing, Pressed Held (tPD, tPDT)
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KILL IGNORED tKILL, BLANK
CYCLES
Power Timing
IGNORED tPDT
tPD,
2954 TD03
Interrupt Timing, Pressed Released, Enable Remains Active
IGNORED
CYCLES
tPD,
tPDT
LTC2954
Description LTC2954 push button On/Off controller that provides control system power push button interface. enable output toggles system power while interrupt output provides debounced push button status. interrupt output used menu driven applications request system power down. power kill input allows microprocessor system release enable output, effectively powering down system. Independently adjustable timers allow dependable push button control enable output resistance accidental toggling system power. length time push button input (PB) must held order toggle enable (EN/EN) output independently adjustable with external capacitors ONT/PDT pins, respectively. During normal operation, interrupt output (INT) asserted 32ms after goes low. then tracks until either EN/EN released. Timing Diagrams page KILL input used immediately release enable output. During normal power down sequence, requests system power down. then performs housekeeping tasks then sets KILL low. fails KILL low, user force system shutdown pressing holding push button until timer expires. Turn When power first applied LTC2954, part initializes output pins. DC/DC converters connected EN/EN will therefore held off. assert enable output, must held minimum 32ms (tDB, ON). LTC2954 provides additional turn debounce time (tONT) optional capacitor connected pin. following equation describes additional time that must held before asserting enable output. CONT external capacitor (µF): CONT 1.56 10-4 [F/ms] (tONT 1ms) Once enable output asserted, DC/DC converters connected this turned KILL input from ignored during succeeding 512ms blanking time KILL, BLANK). This blanking time represents
maximum time required power DC/DC converter KILL brought high during this 512ms time window, enable output released. assumption that 512ms sufficient time system power Turn initiate power down sequence, assert output pressing push button minimum 32ms (tDB,OFF). interrupt signal serves power down request would then perform power down housekeeping tasks assert KILL when done. This turn releases enable output, thus shutting system power. Adjustable Power Down Timer LTC2954 provides failsafe feature that allows user turn system power (via under system fault conditions. cases when fails respond interrupt signal, user force immediate power down pressing holding down push button. length time that must held given fixed internal 64ms delay (tPD,Min) plus adjustable power down timer delay (tPDT, timing diagram page adjustable delay placing optional external capacitor pin. following equation calculate capacitance desired delay. CPDT external capacitor (µF): CPDT 1.56 10-4 [µF/ms] (tPDT 1ms) Simplified Power On/Off Sequence Figure shows simplified LTC2954-1 power power sequence. high transition (t1) initiates power sequence. order assert enable output, must stay continuously high resets timers) time controlled default 32ms external capacitor (t2-t1). Once goes high (t2), internal 512ms blanking timer started. This blanking timer designed give sufficient time DC/DC converter reach final voltage, allow enough time perform power tasks. KILL must pulled high within 512ms going high. Failure results going
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APPLICATIO ATIO
LTC2954
IGNORED tDB, tPD, tPDT KILL
DON'T CARE
APPLICATIO ATIO
tDB, tONT
2954
Figure Simplified Power On/Off Sequence LTC2954-1. Asserts KILL after Interrupt
POWER TIMING POWER TURNED
Figure KILL Remaining Aborts Power Sequence LTC2954-1
KILL IGNORED tKILL, BLANK
DRIVES KILL
tABORT
tDB, tONT 512ms INTERNAL TIMER
FAILED KILL HIGH
KILL
2954
2954f
LTC2954
512ms after went high. Note that LTC2954 does sample KILL until after 512ms internal timer expired. reason ignored ensure that system forced while powering Once 512ms timer expires (t4), release then debounced with internal 32ms timer. system properly powered LTC2954 monitors KILL turnoff command while consuming only supply current. high transition (t5) starts power sequence debounce timer. order assert interrupt output (INT), must stay continuously high resets debounce timer) 32ms (t6-t5). completion power down debounce timer (t6), internal interrupt timer keeps interrupt output least 32ms, even released between this 32ms internal timer (t7), external adjustable power down timer started. capacitor placed will determine time period this timer. push button released prior cycles pin, interrupt output will high (t8). Note that enable output directly changed this interrupt pulse. function interrupt signal initiate software shutdown. performed power down functions asserted KILL input low. This releases enable output, which turn shuts down system power. Note that push button held long enough count cycles pin, enable would released immediately after 16th cycle.
tKILL DC/DC TURNS
DC/DC TURNS
BLANKING (INTERNAL SIGNAL) 256ms
SETS KILL KILL DON'T CARE
2954
Figure Turns Power (LTC2954-1)
system reset state where LTC2954 power mode (6µA) monitored high transition. Aborted Power Sequence power sequence aborted when KILL remains 512ms blanking time. Figure simplified version aborted power sequence. time tABORT, since KILL still low, pulls (thus turning DC/DC converter). Turns Power During Normal Operation Once system powered operating normally, turn power setting KILL low, shown (Figure time KILL, KILL This immediately pulls low, thus turning DC/DC converter. DC/DC Turn Blanking When DC/DC converter turned off, take significant amount time output decay ground. desirable wait until output DC/DC converter near ground before allowing user (via restart converter. This condition guarantees that always powered down completely before restarted. Figure shows turning power off. After KILL releases enable, internal 256ms timer ignores pin. This shown tEN/EN, LOCKOUT (Figure
tEN/EN, Lockout
POWER IGNORED
APPLICATIO ATIO
SETS KILL
KILL DON'T CARE
2954
Figure DC/DC Turn Blanking (LTC2954-1)
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LTC2954
LTC2954-1, LTC2954-2 Versions LTC2954-1 (high true LTC2954-2 (low true differ only polarity high voltage (33V MAX), enable pin. LTC2954-1 leakage high true open drain output designed drive shutdown DC/DC converters. LTC2954-2 leakage, true open drain enable output designed drive gate external PFET. LTC2954-2 provides user manual power path control. High Voltage Pins VIN, EN/EN pins operate voltages 26.4V. can, additionally, operate below ground (-6V)
TYPICAL APPLICATIO
Voltage Monitoring with KILL Input KILL used voltage monitor. Figure shows application where KILL dual function. driven leakage open drain output also connected resistive divider that monitors battery voltage (VIN). When battery voltage falls below value, voltage KILL falls below 0.6V quickly pulled low. Note that resistor values should large possible, small enough keep leakage currents from tripping 0.6V KILL comparator.
806k 100k VOUT 3.3V
LT1767-3.3 SHDN
0.1µF
LTC2954-1 KILL CONT* 0.033µF CPDT*
KILL (OPEN DRAIN)
2954
*OPTIONAL
Figure Input Voltage Monitoring with KILL Input
without latching device. rating ±10kV. push button switch connected exhibits high leakage current, then external pull-up resistor recommended. Furthermore, push button switch physically located from LTC2954 pin, parasitic capacitances couple onto high impedance input. Additionally, parasitic series inductance cause unpredictable ringing pin. Placing 5.1k resistor from push button switch would mitigate parasitic inductance problems. Placing 0.1µF capacitor would lessen impact parasitic capacitive coupling. DC/DC converter shown internal pull-up current SHDN pin. pull-up resistor thus needed. Operation Without Figure shows connect KILL when there circuitry available drive minimum pulse width detected 30µs. there glitches resistor pull-up voltage that wider than 30µs transition below 0.6V, then appropriate bypass capacitor should connected KILL pin. optional CPDT external
VOUT 3.3V LT1767-3.3 SHDN 100k 0.1µF LTC2954-1 KILL CONT* 0.033µF CPDT*
APPLICATIO ATIO
*OPTIONAL
0.01µF
2954
Figure Application
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LTC2954 TYPICAL APPLICATIO
capacitor extends length time (beyond 64ms) that input must held before releasing enable output. High Voltage Power Path Switching high voltage open drain output LTC2954-2 designed switch on/off external power PFET. This allows user connect/disconnect power supply battery) load toggling pin. Figure shows LTC2954-2 controlling cell Li-Ion battery application. KILL connected output PFET through resistive divider. KILL serves voltage monitor. When VOUT drops below causing
4.2V SINGLE CELL Li-Ion BATTERY
0.1µF CERAMIC LTC2954-2 KILL CONT* 0.033µF
4.2V SINGLE CELL Li-Ion BATTERY
Figure Power Path Control with Under Voltage Detect
PARASITICS TRACE CAPACITANCE NOISE TRACE INDUCTANCE 0.1µF 5.1k LTC2954-1 KILL
KILL voltage below VKILL(TH), becomes open circuit 30µs later. Since open circuited, power down debounce time defaults 64ms. Noisy Environment rugged designed operate noisy environments. Transients below ground (>-6V) above (<33V) will damage rugged pin. Additionally, withstand strikes ±10kV. order keep external noise from coupling inside LTC2954, place network close pin. 5.1k resistor 0.1µF capacitor should suffice most noisy applications (see Figure
100K
100K
VOUT VOUT,TRIP POINT 909k
0.6V INPUT 100k *OPTIONAL
OPTIONAL GLITCH FILTER CAPACITOR 0.1µF
2954
DETAILS OMITTED CLARITY
2954
Figure Noisy Trace
2954f
LTC2954 TYPICAL APPLICATIO
External Pull-Up Resistor internal pull-up resistor makes external pull-up resistor unnecessary. Leakage current board trace, however, will affect open circuit voltage pin. leakage large (>2µA), voltage fall close threshold window. mitigate effect board leakage, resistor recommended (see Figure
Reverse Battery Protection protect LTC2954 from reverse battery connection, place resistor series with (see Figure 10).
LTC2954-1/ LTC2954-2 2.4V
EXTERNAL BOARD LEAKAGE CURRENT >2µA
100k
PINS OMITTED CLARITY
EXTERNAL PARASITIC BOARD LEAKAGE >2µA, EXTERNAL PULL-UP RESISTOR
2954
Figure External Pull-Up Resistor
2954f
LTC2954
(Reference 05-08-1702
0.61 ±0.05 SIDES) 0.70 ±0.05 2.55 ±0.05 1.15 ±0.05 PACKAGE OUTLINE 0.25 0.05 0.50 2.20 ±0.05 SIDES) MARK (SEE NOTE 0.200 2.00 ±0.10 SIDES) 0.56 0.05 SIDES) 0.75 ±0.05 3.00 ±0.10 SIDES) 0.05 0.115 0.40 0.10
PACKAGE DESCRIPTIO
Package 8-Lead Plastic (3mm 2mm)
0.25 0.05 2.15 ±0.05 SIDES)
0.50
0.20 0.25 CHAMFER
(DDB8) 0905
RECOMMENDED SOLDER PITCH DIMENSIONS NOTE: DRAWING CONFORMS VERSION (WECD-1) JEDEC PACKAGE OUTLINE M0-229 DRAWING SCALE DIMENSIONS MILLIMETERS DIMENSIONS EXPOSED BOTTOM PACKAGE INCLUDE MOLD FLASH. MOLD FLASH, PRESENT, SHALL EXCEED 0.15mm SIDE EXPOSED SHALL SOLDER PLATED SHADED AREA ONLY REFERENCE LOCATION BOTTOM PACKAGE
0.05
BOTTOM VIEW-EXPOSED
(Reference 05-08-1637)
0.52 0.65 2.90 (NOTE
Package 8-Lead Plastic TSOT-23
1.22
3.85 2.62
2.80
1.50 1.75 (NOTE
RECOMMENDED SOLDER LAYOUT CALCULATOR
0.65 0.80 0.90
0.22 0.36 PLCS (NOTE
0.20 DATUM 1.00
0.01 0.10
0.30 0.50
NOTE: DIMENSIONS MILLIMETERS DRAWING SCALE DIMENSIONS INCLUSIVE PLATING DIMENSIONS EXCLUSIVE MOLD FLASH METAL BURR MOLD FLASH SHALL EXCEED 0.254mm JEDEC PACKAGE REFERENCE MO-193
0.09 0.20 (NOTE
1.95
TSOT-23 0802
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Information furnished Linear Technology Corporation believed accurate reliable. However, responsibility assumed use. Linear Technology Corporation makes representation that interconnection circuits described herein will infringe existing patent rights.
LTC2954
910k VOUT LT1761-1.8 SHDN 1.8V 0.1µF LTC2954-1 CONT* 0.033µF KILL CPDT* KILL *OPTIONAL
2954 TA02
TYPICAL APPLICATIO
BATTERY
Figure Reverse Battery Protection
RELATED PARTS
PART NUMBER LTC2900 TC2909 LTC2910 LTC2914 LTC2950/LTC2951 LTC4411 LTC4412HV LTC4055 LT4351 DESCRIPTION Programmable Quad Supply Monitor Precision Triple/Dual Input Negative Voltage Monitor Octal Positive/Negative Voltage Monitor Quad UV/OV Positive/Negative Voltage Monitor Push Button On/Off Controllers 2.6A Loss Ideal Diode ThinSOT Power Path Controller ThinSOT MOSFET Diode-OR Controller COMMENTS Adjustable RESET, 10-Lead MSOP Packages 6.5V Shunt Regulator High Voltage Operation Eight Adjustable Inputs (0.5V) Adjustable Trip Values High Voltage, Power Push Button Controller with Power Down Fault Detect KILL Timer External MOSFET, Automatic Switching Between Sources Efficient Diode-ORing, Automatic Switching Between Sources, Wide Input Range: 1.2V LLTC2904/LTC2905 Pin-Programmable Dual Supply Monitors Adjustable RESET Tolerance, 8-Lead SOT-23 Packages
Power Controller Li-Ion Charger Automatic Switchover, Charges 1-Cell Li-Ion Batteries
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7417
(408) 432-1900
0606 PRINTED
FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 2006

SHORT PULSE LONG PULSE STAYS TURNS INTERRUPT INTERRUPT 2954 TD01b

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