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Cautions
Keep safety first your circuit designs! Renesas Technology Corporation puts maximum effort into making semiconductor products better more reliable, there always possibility that trouble occur with them. Trouble with semiconductors lead personal injury, fire property damage. Remember give consideration safety when making your circuit designs, with appropriate measures such placement substitutive, auxiliary circuits, (ii) nonflammable material (iii) prevention against malfunction mishap. Notes regarding these materials These materials intended reference assist customers selection Renesas Technology Corporation product best suited customer's application; they convey license under intellectual property rights, other rights, belonging Renesas Technology Corporation third party. Renesas Technology Corporation assumes responsibility damage, infringement third-party's rights, originating product data, diagrams, charts, programs, algorithms, circuit application examples contained these materials. information contained these materials, including product data, diagrams, charts, programs algorithms represents information products time publication these materials, subject change Renesas Technology Corporation without notice product improvements other reasons. therefore recommended that customers contact Renesas Technology Corporation authorized Renesas Technology Corporation product distributor latest product information before purchasing product listed herein. information described here contain technical inaccuracies typographical errors. Renesas Technology Corporation assumes responsibility damage, liability, other loss rising from these inaccuracies errors. Please also attention information published Renesas Technology Corporation various means, including Renesas Technology Corporation Semiconductor home page (http://www.renesas.com). When using information contained these materials, including product data, diagrams, charts, programs, algorithms, please sure evaluate information total system before making final decision applicability information products. Renesas Technology Corporation assumes responsibility damage, liability other loss resulting from information contained herein. Renesas Technology Corporation semiconductors designed manufactured device system that used under circumstances which human life potentially stake. Please contact Renesas Technology Corporation authorized Renesas Technology Corporation product distributor when considering product contained herein specific purposes, such apparatus systems transportation, vehicular, medical, aerospace, nuclear, undersea repeater use. prior written approval Renesas Technology Corporation necessary reprint reproduce whole part these materials. these products technologies subject Japanese export control restrictions, they must exported under license from Japanese government cannot imported into country other than approved destination. diversion reexport contrary export control laws regulations Japan and/or country destination prohibited. Please contact Renesas Technology Corporation further details these materials products contained therein.
HA16129FPJ
Single Watchdog Timer
ADE-204-027B Rev. Mar. 2001 Description
HA16129FPJ watchdog timer that monitors microprocessor runaway. addition watchdog timer function, HA16129FPJ also provides function supplying high-precision stabilized power supply microprocessor, power reset function, power supply voltage monitoring function, fail-safe function that masks microprocessor outputs runaway detected.
Functions
Watchdog timer (WDT) function Monitors P-RUN signal output microprocessor, issues auto-reset (RES) signal microprocessor runaway detected. Stabilized power supply Provides power microprocessor. Power clock functions power function outputs level signal microprocessor fixed period when power first applied. clock function outputs signal microprocessor fixed period after runaway occurs. Power supply monitoring function When reference voltage (Vout) falls becomes lower than detection voltage (4.63 Typ) STBY detection voltage (3.0 Typ), this function outputs either signal STBY signal, respectively. Note that detection monitor either Vout. OUTE function*1 (fail-safe function) Outputs signal used mask microprocessor outputs when microprocessor runaway been detected. delay function Sets delay between time signal output time signal output. Protection functions HA16129FPJ incorporates both Vout overvoltage prevention current limiter functions. Note: OUTE function: OUTE abbreviation output enable.
HA16129FPJ
Features
High-precision output voltage: 1.5% supports both frequency duty detection schemes. High-precision power supply monitoring function: 4.625 0.125 Built-in OUTE function functions adjusted with external resistors and/or capacitors.
Arrangement
P-RUN CRES Voadj OUTE
(Top view)
STBY STBYadj NMIadj NMIsns VOUT CONT
HA16129FPJ
Block Diagram
microprocessor other device) power supply connections
CONT
VOUT
31.2k STBYadj 36.8k 1.5V
3.3k
150mV 1.24V Current limiter block Overvoltage detection block
Voadj
Vout NMIsns
STBY detection block
Regulator block
1.18V
3.3k
STBY STBY detection block 3.3k OUTE
NMIadj
detection block
OUTE block
8.4k
3.3k
If*16 block If/6 IR*4/3
block
CRES
P-RUN
Delay circuit block
Note: current, voltage, resistor values listed diagram reference values. Connect Vout
HA16129FPJ
Function
Related Function WDT. tOFF Symbol P-RUN Function Watchdog timer pulse input. auto-reset function controlled duty cycle frequency this input pulse signal. resistor connected this determines current that flows capacitor. resistor value from current determined charges capacitor potential this determines watchdog timer frequency band. resistor connected this determines current that flows capacitor. resistor value from current determined charges capacitor potential this controls function (toff, tRL). resistor which determines only time function connected this pin. This resistor determines current that charges capacitor time resistor value from current determined charges capacitor RES, delay times TRES determined potential this capacitor. Ground Insert resistor Roadj fine adjustment regulator output voltage Vout required. Leave this open Vout does need changed. Output OUTE function Power supply Current limiter detection. Connect overcurrent detection resistor between pin. this function used, short this VCC. Also, connect this emitter external transistor. (This function operate when Connect this base external transistor. Provides regulator output voltage internal power supply. Connect this collector external transistor. This senses detection voltage. detected, connect this (however, note that external resistor required), Vout detected, connect this VOUT pin. Insert resistor fine adjustment detection voltage required. Leave this open fine adjustment required. output output Insert resistor fine adjustment detection voltage required. Leave this open fine adjustment required. STBY output
tRES
CRES
Vout Output Power supply Current limiter
Voadj OUTE
Vout
CONT VOUT NMIsns
Output Output STBY Output
NMIadj STBYadj STBY
HA16129FPJ
Functional Description
This section describes functions provided HA16129FPJ. section formulas details adjustment methods. Regulator Block Vout Voltage This provides stabilized power supply controlling base current external transistor. largest current (the maximum CONT current) that drawn base this external transistor Also note that Vout output also used power supply this IC's internal circuits. Current Limiter Block When current detection resistor connected between pin, voltage between these pins exceeds voltage (150 Typ), CONT function turns output voltage supply stopped. This function work when VOUT Note: This function short detection. Output Voltage (Vout) Adjustment output voltage adjusted connecting external resistor output voltage adjustment (Voadj). However, some reason voltage this Vout line increases exceeds voltage adjustment range Max), CONT function turns output voltage supply stopped. Refer timing charts conjunction with following items. (Low Voltage Inhibit) Detection Voltage This function monitors drops power-supply voltage. This function monitor either Vout. When Vout monitored, level output from that voltage falls under detection voltage (4.63 Typ). Then, when power-supply voltage that fell rises again, will output high level. Note that this function fixed hysteresis (Typ). monitored power supply selected connecting NMIsns either pin. When detecting VCC, external adjustment resistor required.) detection voltage also adjusted with NMIadj pin. STBY Detection Voltage This function monitors drops Vout voltage. monitors Vout voltage, outputs level from STBY that voltage drops below detection voltage (3.0 Typ). Then, when powersupply voltage that fell rises again, STBY will output high level. Note that this function fixed hysteresis 1.35 (Typ). detection voltage also adjusted with STBYadj pin.
HA16129FPJ
Function Start Voltage This minimum required Vout voltage RES, NMI, STBY, OUTE output functions start operating. stipulated voltage that Vout must reach after power first applied these pins output level. Hysteresis This difference between function detection voltage when power-supply voltage drops, clear (reset) voltage when power-supply voltage rises.
(VHYSN VNMI' NMI; VHYSS VSTBY' STBY)
OUTE Function When microprocessor runaway state, outputs undefined, thus possible that outputs driven incorrect signals. This function used mask such incorrect microprocessor outputs. When function recognizes normal operation (when output high), OUTE output will held high. When function recognizes abnormal state auto-reset pulse output from pin, OUTE output will held low. Thus microprocessor outputs during microprocessor runaway masked taking those outputs this signal using external gates. OUTE output will high when voltage exceeds VthHcr2, will when that voltage falls below VthLcr. There limitation that apply when OUTE function used. Refer calculation formulas item details. Function This period length high-level output period pulse when P-RUN signal from microprocessor stops. This time required potential reach VthLcr from VthHcr1. This period length low-level output period pulse when P-RUN signal from microprocessor stops. This time required potential reach VthHcr1 from VthLcr. tOFF This time from point P-RUN signal from microprocessor stops point level output from pin. During normal microprocessor operation, potential will about Vout (although this value change with P-RUN signal input conditions, should verified actual application circuit) tOFF time potential reach VthLcr from that potential.
HA16129FPJ
time from point output goes high when power first applied point output goes low. time potential reach VthHcr1 from time fixed delay time between point output goes from high after powersupply voltage comes point goes from high. time time CRES potential fall from high voltage (about Vthcres. tRES time tRES fixed delay time between point output goes from high when power-supply voltage falls point goes from high low. time tRES time CRES potential rise from Vthcres. Function This function determines whether microprocessor operating normally entered runaway state monitoring duty frequency P-RUN signal. When this function recognizes runaway state, outputs reset pulse from sets OUTE from high. holds OUTE pins fixed high long recognizes normal microprocessor operation. this function, potential capacitor controlled P-RUN signal. This potential charges capacitor that controls reset pulse between VthLcf VthHcf. judgment whether microprocessor operating normally, determined balance between charge discharge voltage capacitor this time.
HA16129FPJ
Calculation Formulas
Item Reference voltage Formula Vout 1.225 Notes While Vout voltage will ±1.5% when Voadj open, circuit shown here should used change Vout voltage externally.
Vout Voadj
Current limiter voltage
(150 Typ)
When this function operates, base current external transistor connected stops Vout output lowered.
Vout
This function prevents microprocessor from being damaged Vout voltage inadvertently increased high level. detection voltage fixed. These determine reset pulse frequency duty.
Sets time from rise signal point output cleared.
tOFF
Sets time from point P-RUN pulse stops point reset pulse output.
P-RUN
toff
HA16129FPJ
Calculation Formulas (cont)
Item VSTBY Formula
VSTBY 1.48
Notes
29.5 +67.6 36.2
voltage which STBY signal output when Vout falls. STBY detection voltage adjusted connecting resistor between STBYadj ground (R3). However, STBY recovery voltage cannot adjusted.
Vout Vout VSTBY STBYadj STBY STBY VSTBY'
VNMI (Vout detection)
VNMI
voltage which signal output when Vout falls. (When NMIsns connected Vout.) detection voltage adjusted connecting resistors between NMIadj Vout (R1), between NMIadj ground (R2).
Vout NMIsns NMIadj VNMI' VNMI
Vout
VNMI (VCC detection)
VNMI 4.62
R197.1
voltage which signal output when falls. (When NMIsns connected VCC.) detection voltage adjusted connecting resistors between NMIsns (R1), between NMIsns ground (R2).
Recovery voltage VNMI 4.68 45.5
NMIsns
Vout VNMI
VNMI'
OUTE
19.3
OUTE function used, relationship shown left must fulfilled assure that pulses incorrectly generated this output when microprocessor runaway state detected.
HA16129FPJ
Calculation Formulas (cont)
Item WDT. Formula 0.31 fLine2 (fixed) 0.024 fLine3 fLine4 fLine1 relationship between fLine1 fLine3 fLine1 fLine3 12.9 P-RUN signal duty cycle
Frequency Normal operation area fLine2 fLine3 fLine4 fLine1
Notes function judges whether P-RUN pulse signal normal not. function judges P-RUN pulse signal abnormal, outputs reset signal. normal range area enclosed Line1 Line4 figure.
Duty
HA16129FPJ
Timing Charts
Whole system timing chart
VOUT
VSTBY'
VNMI
VNMI' VSTBY
STBY
tRES
tRES
OUTE
tOFF
P-RUN
Microprocessor runaway
HA16129FPJ
WDT. timing chart
Normal operation High-frequency runaway Low-frequency runaway
VOUT
P-RUN VthHcf VthLcf VthHcr2
VthHcr1 VthLcr
tOFF
OUTE
timing chart
VNMI' VSTBY' VOUT VNMI VSTBY
STBY
OUTE CRES
tRES Vthcres
HA16129FPJ
Absolute Maximum Ratings 25°C)
Item Power supply voltage voltage CONT current CONT voltage Vout voltage P-RUN voltage NMIsns voltage voltage STBY voltage voltage OUTE voltage Power dissipation
Symbol Icont Vcont Vout VPRUN VNMIsns VNMI VSTBY VRES VOUTE Topr Tstg
Rating Vout Vout Vout Vout Vout +125
Unit
Operating temperature Storage temperature Note:
This allowable value when mounted glass-epoxy printed circuit board with mounting density ambient temperatures 77°C. This value must derated mW/°C above that temperature. Power Dissipation (mW) 85°C Ambient Temperature (°C) 77°C
HA16129FPJ
Electrical Characteristics 25°C, 12V, Vout 5.0V, 180k, 3300pF, 0.1µF, 390k, CRES 1500pF, 0.2)
Item Power supply current Current limiter voltage Symbol Unit (VCC voltage voltage) 12V, Icont 17.5V, Icont 10mA Icont 15mA 0.5Vrms, 1kHz Test conditions
Regulator Output voltage block
Vout
4.925
5.00
5.075
Input voltage stabilization Volin
Load current stabilization Voload Ripple exclusion ratio Output voltage temperature coefficient Output voltage adjustment range P-RUN Input high-level voltage input block Input low-level voltage Input high-level current Input low-level current output High level block level Function start voltage STBY output block High level RREJ
(45)
(200)
Vout/T VoMAX VOHN VOLN VSTN VOHS
ppm/°C Icont 5.0V 0.0V 2.0mA
Vout Vout
Vout
Vout Vout
Vout
level Function start voltage
VOLS VSTS
2.0mA
Note: Values parentheses design reference values.
HA16129FPJ
Electrical Characteristics 25°C, 12V, Vout 5.0V, 180k, 3300pF, 0.1µF, 390k, CRES 1500pF, 0.2) (cont)
Item output block High level Symbol VOHR Unit Test conditions
Vout Vout
Vout
level Function start voltage OUTE output block High level
VOLR VSTR VOHE
2.0mA
Vout Vout
Vout
level Function start voltage function Power time Clock time Reset pulse high time Reset pulse time function function (Vout detection) Detection voltage
VOLE VSTE toff VNMI1
4.63
4.75
2.0mA
Hysteresis VHYSN1
(400)
ppm/°C 13k, 390k
Temperature VNMI/T coefficient function (VCC detection) Detection voltage VNMI2
Hysteresis VHYSN2 STBY function Detection voltage Hysteresis VSTBY VHYSS
2.70 1.20
3.00 1.35
3.30 1.50 (400) (300) (300)
ppm/°C
13k, 390k
Temperature VSTBY/T coefficient Disable time delay time Recovery time (100) (100)
Note: Values parentheses design reference values.
HA16129FPJ
Test Circuits
Vout test circuit
Icont STBY Voadj P-RUN NMIadj CRES Here, Vout voltage 12V, Icont monitored Vout varied. HA16129FPJ NMIsns CONT Vout STBYadj Units: Resistors Capacitors Vout
1kHz duty
180k
3300p 180k
0.1µ
390k
1500p
test circuit
STBY Voadj P-RUN NMIadj CRES HA16129FPJ NMIsns CONT Vout STBYadj *ICC Iout Iout Vout
1kHz duty
180k
3300p 180k
0.1µ
390k
1500p
Test circuit other parameters
STBY HA16129FPJ NMIsns NMIadj CRES CONT Vout STBYadj
Vout detection detection 390k
Frequency counter
Voadj P-RUN 1kHz duty 180k
3300p 180k
0.1µ
390k
1500p
HA16129FPJ
System Circuit Examples
Example basic system
180k 3300p 180k 0.1µ 390k 1500p
P-RUN
STBY STBYadj
STBY
HA16129FPJ
CRES Voadj
NMIadj NMIsns
VOUT CONT
Microprocessor
PORT other power supplies
PORT
200µ
OUTE
BATTERY
Example system using backup circuit primary voltage monitoring circuit
180k 3300p 180k 0.1µ 390k 1500p
P-RUN
STBY STBYadj
STBY
HA16129FPJ
CRES Voadj
NMIadj NMIsns VOUT CONT
PORT (5V) other power supplies
200µ
Microprocessor
PORT
OUTE
Primary detection
BATTERY
Backup circuit Schottky diode Zener diode
Load
Load
HA16129FPJ
Operating Waveforms
Frequency Duty Characteristics 100k 25°C, 0.1µF, 180k, 390k, 180k, 3300pF CRES 1500pF Runaway area OUTE runaway detection lines
OUTE normal recovery line
Frequency (Hz)
Normal area OUTE Pulse generator VOH: VOL: Monitor
Duty
Power Time (tON) Resistance Characteristics 1000 25°C, 12V, 180k, 3300pF, CRES 1500pF
0.47µF
Power Time (tON) (ms)
0.1µF
0.033µF
1000
Resistance
HA16129FPJ
Clock Time (toff) Resistance Characteristics 1000 25°C, 180k, 3300pF, CRES 1500pF, 390k
0.47µF
Clock Time (toff) (ms)
0.1µF
0.033µF
1000
Resistance
Reset Pulse High Time (tRH) Resistance Characteristics 25°C, 180k, 3300pF, 390k, CRES 1500pF
1000 Reset Pulse High Time (tRH) (ms)
0.47µF
0.1µF 0.033µF
1000
Resistance
HA16129FPJ
Reset Pulse Time (tRL) Resistance Characteristics 1000 25°C, 180k, 3300pF, 390k, CRES 1500pF 0.47µF
Reset Pulse Time (tRL) (ms)
0.1µF
0.033µF
1000
Resistance
Delay Time Recovery Time (tr) Resistance Characteristics 10000 5000 Delay Time Recovery Time (tr) (µs) 25°C, 3300pF, 180k, 390k, 0.1µF CRES 0.01µF
1000
CRES 1500pF
CRES 560pF
1000
Resistance
HA16129FPJ
Delay Time Disable Time (tRES) Resistance Characteristics 10000 5000 Delay Time Disable Time (tRES) (µs) 25°C, 3300pF, 180k, 0.1µF, 390k CRES 0.01µF
1000 CRES 1500pF
CRES 560pF
1000
Resistance
Output Voltage Roadj Resistance Ground) Characteristics 25°C, 12V, 3300pF, 180k, 0.1µF, 180k, 390k, CRES 1500pF
Output Voltage Vout Voadj Roadj
1000
5000
Roadj Resistance Ground)
HA16129FPJ
Output Voltage Roadj Resistance Vout) Characteristics 25°C, 12V, 3300pF, 180k, 0.1µF, 180k, 390k, CRES 1500pF
Output Voltage Vout
Vout Voadj
Roadj
Roadj Resistance Vout)
ICONT Current Vout Voltage Characteristics 25°C, 3300pF, 180k, 0.1µF, 180k, 390k, CRES 1500pF
ICONT Current (µA)
4.92
4.94
4.96 4.98 Vout Voltage ICONT
5.00
5.02
Vout
Vout CONT
Vout Voltage
HA16129FPJ
Package Dimensions
Unit:
12.6
0.80
2.20
*0.22 0.05 0.20 0.04
0.20 7.80 0.30
1.15
0.70 0.20
1.27 *0.42 0.08 0.40 0.06
0.12
*Dimension including plating thickness Base material dimension
0.10 0.10
0.15
Hitachi Code JEDEC EIAJ Mass (reference value)
FP-20DA Conforms 0.31
HA16129FPJ
Cautions
Hitachi neither warrants grants licenses rights Hitachi's third party's patent, copyright, trademark, other intellectual property rights information contained this document. Hitachi bears responsibility problems that arise with third party's rights, including intellectual property rights, connection with information contained this document. Products product specifications subject change without notice. Confirm that have received latest product standards specifications before final design, purchase use. Hitachi makes every attempt ensure that products high quality reliability. However, contact Hitachi's sales office before using product application that demands especially high quality reliability where failure malfunction directly threaten human life cause risk bodily injury, such aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment medical equipment life support. Design your application that product used within ranges guaranteed Hitachi particularly maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions other characteristics. Hitachi bears responsibility failure damage when used beyond guaranteed ranges. Even within guaranteed ranges, consider normally foreseeable failure rates failure modes semiconductor devices employ systemic measures such failsafes, that equipment incorporating Hitachi product does cause bodily injury, fire other consequential damage operation Hitachi product. This product designed radiation resistant. permitted reproduce duplicate, form, whole part this document without written approval from Hitachi. Contact Hitachi's sales office questions regarding this document Hitachi semiconductor products.
Hitachi, Ltd.
Semiconductor Integrated Circuits. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
NorthAmerica Europe Asia Japan
http://sicapac.hitachi-asia.com
Hitachi Asia Ltd. Hitachi Tower Collyer Quay #20-00, Singapore 049318 <65>-538-6533/538-8577 <65>-538-6933/538-3877 http://www.hitachi.com.sg Hitachi Asia Ltd. (Taipei Branch Office) 4/F, 167, North Road, Hung-Kuo Building, Taipei (105), Taiwan <886>-(2)-2718-3666 <886>-(2)-2718-8180 Telex 23222 HAS-TP http://www.hitachi.com.tw Hitachi Asia (Hong Kong) Ltd. Group (Electronic Components) 7/F., North Tower, World Finance Centre, Harbour City, Canton Road Tsim Tsui, Kowloon, Hong Kong <852>-(2)-735-9218 <852>-(2)-730-0281
further information write
Hitachi Semiconductor (America) Inc. East Tasman Drive, Jose,CA 95134 Tel: (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe Ltd. Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 585200 Hitachi Europe GmbH Electronic Components Group Dornacher D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9180-0 Fax: <49> (89)
Copyright Hitachi, Ltd., 2001. rights reserved. Printed Japan.
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