TL7702A TL7705A TL7709A TL7712A TL7715A SLVS028F TL7702ACD TL7705ACD TL7709ACD - Datasheet Archive

 

SUPPLY-VOLTAGE SUPERVISORS SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 D D D D D D D D OR P PACKAGE (TOP VIEW) Power-On

 

TL7702A TL7702A, TL7705A TL7705A, TL7709A TL7709A, TL7712A TL7712A, TL7715A TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028F SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 D D D D D D D D OR P PACKAGE (TOP VIEW) Power-On Reset Generator Automatic Reset Generation After Voltage Drop Wide Supply-Voltage Range Precision Voltage Sensor Temperature-Compensated Voltage Reference True and Complement Reset Outputs Externally Adjustable Pulse Duration REF RESIN CT GND 1 8 2 7 3 6 4 5 VCC SENSE RESET RESET description The TL77xxA family of integrated-circuit supply-voltage supervisors is specifically designed for use as reset controllers in microcomputer and microprocessor systems. The supply-voltage supervisor monitors the supply for undervoltage conditions at the SENSE input. During power up, the RESET output becomes active (low) when VCC attains a value approaching 3.6 V. At this point (assuming that SENSE is above VIT+), the delay timer function activates a time delay, after which outputs RESET and RESET go inactive (high and low, respectively). When an undervoltage condition occurs during normal operation, outputs RESET and RESET go active. To ensure that a complete reset occurs, the reset outputs remain active for a time delay after the voltage at the SENSE input exceeds the positive-going threshold value. The time delay is determined by the value of the external capacitor CT: td = 1.3 × 104 × CT, where CT is in farads (F) and td is in seconds (s). During power down and when SENSE is below VIT­, the outputs remain active until VCC falls below 2 V. After this, the outputs are undefined. An external capacitor (typically 0.1 µF) must be connected to REF to reduce the influence of fast transients in the supply voltage. The TL77xxAC series is characterized for operation from 0°C to 70°C. The TL77xxAI series is characterized for operation from ­40°C to 85°C. AVAILABLE OPTIONS PACKAGED DEVICES SMALL OUTLINE (D) PLASTIC DIP (P) 0°C to 70°C TL7702ACD TL7702ACD TL7705ACD TL7705ACD TL7709ACD TL7709ACD TL7712ACD TL7712ACD TL7715ACD TL7715ACD TL7702ACP TL7702ACP TL7705ACP TL7705ACP TL7709ACP TL7709ACP TL7712ACP TL7712ACP TL7715ACP TL7715ACP ­40°C to 85°C TL7702AID TL7702AID TL7705AID TL7705AID TL7709AID TL7709AID TL7712AID TL7712AID TL7715AID TL7715AID TL7702AIP TL7702AIP TL7705AIP TL7705AIP TL7709AIP TL7709AIP TL7712AIP TL7712AIP TL7715AIP TL7715AIP TA The D package is available taped and reeled. Add the suffix R to the device type (e.g., TL7702ACDR TL7702ACDR). Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright © 2000, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 1 TL7702A TL7702A, TL7705A TL7705A, TL7709A TL7709A, TL7712A TL7712A, TL7715A TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028F SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 functional block diagram The functional block diagram is shown for illustrative purposes only; the actual circuit includes a trimming network to adjust the reference voltage and sense-comparator trip point. VCC 8 Reference Voltage CT SENSE 100 µA 6 3 7 5 RESET RESET R1 (see Note A) R2 (see Note A) RESIN 2 1 REF GND 4 NOTES: A. TL7702A TL7702A: R1 = 0 , R2 = open TL7705A TL7705A: R1 = 7.8 k, R2 = 10 k TL7709A TL7709A: R1 = 19.7 k, R2 = 10 k TL7712A TL7712A: R1 = 32.7 k, R2 = 10 k TL7715A TL7715A: R1 = 43.4 k, R2 = 10 k B. Resistor values shown are nominal. timing diagram VCC and SENSE Threshold Voltage VCC 3.6 V VCC 2 V Output Undefined 2 ÎÎ ÎÎ RESET td POST OFFICE BOX 655303 td Output Undefined · DALLAS, TEXAS 75265 TL7702A TL7702A, TL7705A TL7705A, TL7709A TL7709A, TL7712A TL7712A, TL7715A TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028F SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 absolute maximum ratings over operating free-air temperature (unless otherwise noted) Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V Input voltage range, VI, RESIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­0.3 V to 20 V Input voltage range, VI, SENSE: TL7702A TL7702A (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­0.3 V to 6 V TL7705A TL7705A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­0.3 V to 20 V TL7709A TL7709A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­0.3 V to 20 V TL7712A TL7712A, TL7715A TL7715A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­0.3 V to 20 V High-level output current, IOH, RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­30 mA Low-level output current, IOL, RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Package thermal impedance, JA (see Notes 3 and 4): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87°C/W Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P package . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­65°C to 150°C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values are with respect to the ground terminal. 2. For proper operation of the TL7702A TL7702A, the voltage applied to the SENSE terminal should not exceed VCC ­ 1 V or 6 V, whichever is less. 3. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) ­ TA)/JA. Operating at the absolute maximum TJ of 150°C can affect reliability. 4. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions MIN High-level input voltage at RESIN, VIH MAX 3.5 Supply voltage, VCC 18 2 Low-level input voltage at RESIN, VIL V V 0.6 TL7702A TL7702A 0 0 10 TL7709A TL7709A 0 15 TL7712A TL7712A 0 20 TL7715A TL7715A 0 V See Note 2 TL7705A TL7705A Input voltage, SENSE, VI UNIT V 20 High-level output current, RESET, IOH ­16 mA Low-level output current, RESET, IOL 16 mA Timing capacitor, CT 10 µF TL77xxAC Operating free-air temperature range, TA free air range TL77xxAI 0 70 ­40 85 °C NOTE 2: For proper operation of the TL7702A TL7702A, the voltage applied to the SENSE terminal should not exceed VCC ­ 1 V or 6 V, whichever is less. POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 3 TL7702A TL7702A, TL7705A TL7705A, TL7709A TL7709A, TL7712A TL7712A, TL7715A TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028F SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 electrical characteristics over recommended operating conditions (unless otherwise noted) TL77xxAC TL77xxAI TEST CONDITIONS PARAMETER MIN VOH VOL High-level output voltage, RESET Low-level output voltage, RESET IOH = ­16 mA IOL = 16 mA Vref Reference voltage TA = 25°C TYP UNIT MAX VCC­1.5 V 2.58 V 2.48 2.53 2.58 TL7705A TL7705A 4.5 4.55 4.6 7.5 7.6 7.7 TL7712A TL7712A 10.6 10.8 11 TL7715A TL7715A Negative-going i N ti i input th h ld voltage, t threshold lt SENSE V 2.53 TL7702A TL7702A VIT­ 0.4 2.48 13.2 13.5 13.8 TL7709A TL7709A TA = 25°C TL7702A TL7702A 10 TL7705A TL7705A Vhys y Hysteresis, SENSE (VIT+ ­ VIT­) TL7709A TL7709A 15 TA = 25°C 35 TL7715A TL7715A II Input current SENSE IOH IOL 45 VI = 2.4 V to VCC VI = 0.4 V TL7702A TL7702A High-level output current, RESET mV 20 TL7712A TL7712A RESIN V 20 ­100 Vref < VI < VCC ­ 1.5 V VO = 18 V 0.5 µA 2 50 µA ­50 Low-level output current, RESET VO = 0 ICC Supply current All inputs and outputs open All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT, and VCC to GND. 1.8 µA 3 mA switching characteristics over recommended operating conditions (unless otherwise noted) TEST CONDITIONS PARAMETER TL77xxAC TL77xxAI UNIT MIN 1.2 2.6 msec 0.4 Input pulse duration at RESIN tw(S) Pulse duration at SENSE input to switch outputs VIH = VIT­ +200 mV, tpd Propagation delay time, RESIN to RESET VCC = 5 V tr Rise time tf Fall time RESET RESET RESET RESET VIL = VIT­ ­200 mV VCC = 5 V V, See Note 5 VCC = 5 V V, See Note 5 POST OFFICE BOX 655303 µs 2 µs 1 All switching characteristics are measured with 0.1-µF capacitors connected at REF and VCC to GND. NOTE 5: The rise and fall times are measured with a 4.7-k load resistor at RESET and RESET. 4 MAX 0.65 CT = 0.1 µF Output pulse duration TYP · DALLAS, TEXAS 75265 0.2 3.5 3.5 0.2 µs µs µs TL7702A TL7702A, TL7705A TL7705A, TL7709A TL7709A, TL7712A TL7712A, TL7715A TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028F SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 PARAMETER MEASUREMENT INFORMATION Voltage Drop tw(S) SENSE VIT+ VIT­ VIT+ 0V VIH RESIN Undefined 2V 0.7 V tf tr VIL tpd 90% 90% RESET 90% VOH(RESET) 50% td td tf td 90% RESET 50% 10% ÎÎ ÎÎ 10% 10% 10% 10% VOL(RESET) tr Figure 1. Voltage Waveforms POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 5 TL7702A TL7702A, TL7705A TL7705A, TL7709A TL7709A, TL7712A TL7712A, TL7715A TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028F SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 TYPICAL CHARACTERISTICS DEASSERTION TIME vs LOAD RESISTANCE ASSERTION TIME vs LOAD RESISTANCE 7 42 VCC = 5 V CT = 0.1 µF CL = 10 pF TA = 25°C 6 t ­ Deassertion Time ­ µ s t ­ Assertion Time ­ ns 38 34 30 VCC = 5 V CT = 0.1 µF CL = 10 pF TA = 25°C RESET tr 26 5 4 RESET tf 3 2 RESET tr 22 RESET tf 1 0 18 0 2 8 4 6 RL ­ Load Resistance ­ k 0 10 2 4 6 8 RL ­ Load Resistance ­ k Figure 2 Figure 3 DEASSERTION TIME vs LOAD CAPACITANCE ASSERTION TIME vs LOAD CAPACITANCE 3.6 44 VCC = 5 V CT = 0.1 µF RL = 4.7 k TA = 25°C 36 RESET tr 32 28 RESET tf 24 VCC = 5 V CT = 0.1 µF RL = 4.7 k TA = 25°C 3.2 t ­ Deassertion Time ­ µ s t ­ Assertion Time ­ ns 40 10 2.8 RESET tf 2.4 2 RESET tr 1.6 1.2 0.8 20 0 25 50 75 100 125 150 CL ­ Load Capacitance ­ pF 175 200 0 25 50 75 100 125 150 175 200 CL ­ Load Capacitance ­ pF Figure 4 Figure 5 For proper operation, both RESET and RESET should be terminated with resistors of similar value. Failure to do so may cause unwanted plateauing in either output waveform during switching. 6 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TL7702A TL7702A, TL7705A TL7705A, TL7709A TL7709A, TL7712A TL7712A, TL7715A TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028F SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 APPLICATION INFORMATION 5V 12 V 8 5 6 RESET 4 CT System Reset TL7705A TL7705A 3 GND 5 RESET RESIN 10 k 1 REF CT 2 10 k VCC SENSE 7 TL7712A TL7712A 3 8 22 k VCC 7 SENSE 2 RESIN RESET CT 10 k 4 CT 0.1 µF 6 RESET 1 REF GND 10 k 0.1 µF GND 8 7 2 3 C T(F) VCC SENSE RESIN RESET d(s) 10 4 5 TL7712A TL7712A 6 RESET 1 CT REF GND 10 k 4 CT + 1.3t 0.1 µF ­12 V Figure 6. Multiple Power-Supply System Reset Generation 5V 8 7 2 C T(F) + 1.3 t d(s) 10 k VCC SENSE RESIN RESET 5 TL7705A TL7705A 6 RESET 3 1 CT REF GND 10 4 CT 4 VCC RESET TMS7000 TMS7000 10 k VSS 0.1 µF GND Figure 7. Reset Controller for TMS7000 TMS7000 System POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 7 TL7702A TL7702A, TL7705A TL7705A, TL7709A TL7709A, TL7712A TL7712A, TL7715A TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028F SLVS028F ­ APRIL 1983 ­ REVISED NOVEMBER 2000 APPLICATION INFORMATION 5V µA7805 A7805 INPUT 4.7 k 8 OUTPUT 7 Input VCC SENSE System RESET RESET 5 COMMON 3 CI TL7705A TL7705A 6 RESET 1 CT REF GND 4 CT CO 25 k S G Q1 2N3994 2N3994 D 4.7 k 0.1 µF Figure 8. Eliminating Undefined States Using a P-Channel JFET VCC 10 k 750 Q1 2N4036 2N4036 8 SENSE Input 7 2.7 k VCC 5 RESET SENSE System RESET TL77xxA 2 3 RESET RESIN CT REF 6 1 10 k 1 k GND CT 4 0.1 µF Figure 9. Eliminating Undefined States Using a pnp Transistor 8 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI's publication of information regarding any third party's products or services does not constitute TI's approval, warranty or endorsement thereof. Copyright © 2000, Texas Instruments Incorporated