TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 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 (assuming that SENSE is below VIT–), the outputs remain active until the VCC falls below a maximum of 2 V. After this, the outputs are undefined. An external capacitor (typically 0.1 µF for the TL77xxAC and TL77xxAI) 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 CHIP FORM (Y) SMALL OUTLINE (D) PLASTIC DIP (P) 0°C to 70°C TL7702ACD TL7705ACD TL7709ACD TL7712ACD TL7715ACD TL7702ACP TL7705ACP TL7709ACP TL7712ACP TL7715ACP TL7702ACY TL7705ACY TL7709ACY TL7712ACY TL7715ACY –40°C to 85°C TL7702AID TL7705AID TL7709AID TL7712AID TL7715AID TL7702AIP TL7705AIP TL7709AIP TL7712AIP TL7715AIP — — — — — TA The D package is available taped and reeled. Add the suffix R to the device type (e.g., TL7702ACDR). Chip forms are tested at 25°C. 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 1999, 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, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 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 GND 4 NOTES: A. TL7702A: R1 = 0 Ω, R2 = open TL7705A: R1 = 7.8 kΩ, R2 = 10 kΩ TL7709A: R1 = 19.7 kΩ, R2 = 10 kΩ TL7712A: R1 = 32.7 kΩ, R2 = 10 kΩ TL7715A: R1 = 43.4 kΩ, R2 = 10 kΩ B. Resistor values shown are nominal. timing diagram VCC and SENSE Threshold Voltage VCC ≈ 3.6 V RESET ÎÎ ÎÎ td VCC ≈ 2 V td Output Undefined 2 Output Undefined POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 REF TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 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 (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V TL7705A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 V TL7709A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 V TL7712A, 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, θJA (see Notes 3 and 4): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W P package . . . . . . . . . . . . . . . . . . . . . . . . . . . 127°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 network ground terminal. 2. For proper operation of the 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), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability. 4. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. recommended operating conditions Supply voltage, VCC High-level input voltage at RESIN, VIH MIN MAX 3.5 18 2 Low-level input voltage at RESIN, VIL V V 0.6 Input voltage, SENSE, VI UNIT TL7702A 0 See Note 2 TL7705A 0 10 TL7709A 0 15 TL7712A 0 20 TL7715A 0 V V 20 High-level output current, RESET, IOH –16 mA Low-level output current, RESET, IOL 16 mA 10 µF Timing capacitor, CT TL77xxAC Operating free-air free air temperature range, range TA TL77xxAI 0 70 –40 85 °C NOTE 2: For proper operation of the 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, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 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 VIT– Negative-going N ti i iinputt th threshold h ld voltage, lt SENSE 0.4 V 2.53 2.58 V TL7702A 2.48 2.53 2.58 TL7705A 4.5 4.55 4.6 7.5 7.6 7.7 TL7712A 10.6 10.8 11 TL7715A 13.2 13.5 13.8 TL7709A TA = 25°C TL7709A 15 TA = 25°C Input current SENSE 35 IOH IOL 45 VI = 2.4 V to VCC VI = 0.4 V TL7702A High-level output current, RESET mV 20 TL7715A RESIN V 10 TL7712A II V 2.48 TL7705A Hysteresis, SENSE (VIT+ – VIT–) UNIT MAX VCC–1.5 TL7702A Vhys y TYP 20 –100 Vref < VI < VCC – 1.5 V VO = 18 V 0.5 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 2 µA –50 µA 3 mA switching characteristics over recommended operating conditions (unless otherwise noted) TEST CONDITIONS‡ PARAMETER CT = 0.1 µF Output pulse duration 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 UNIT MIN TYP MAX 0.65 1.2 2.6 • DALLAS, TEXAS 75265 µs 0.4 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-kΩ load resistor at RESET and RESET. 4 TL77xxAC TL77xxAI 0.2 3.5 3.5 0.2 µs µs µs TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwise noted) TEST CONDITIONS† PARAMETER Vref VIT– Vhys y II ICC TL77xxAY MIN Reference voltage Input current, SENSE MAX 2.53 Negative-going input threshold voltage, SENSE Hysteresis, SENSE (VIT+ – VIT–) TYP TL7702A 2.53 TL7705A 4.55 TL7709A 7.6 TL7712A 10.8 TL7715A 13.5 TL7702A 10 TL7705A 15 TL7709A 20 TL7712A 35 TL7715A 45 TL7702A Supply current Vref < VI < VCC – 1.5 V All inputs and outputs open UNIT V V mV 0.5 µA 1.8 mA † All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT, and VCC to GND. switching characteristics over recommended operating conditions, TA = 25°C (unless otherwise noted) TEST CONDITIONS‡ PARAMETER td Output pulse time delay CT = 0.1 µF ‡ All switching characteristics are measured with 0.1-µF capacitors connected at REF and VCC to GND. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TL77xxAY MIN TYP 1.2 MAX UNIT µs 5 TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 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% 50% 10% td ÎÎ ÎÎ td td tf 90% RESET 50% 10% 10% 10% tr Figure 1. Voltage Waveforms 6 VOH(RESET) POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 10% VOL(RESET) TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 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 – kΩ 0 10 2 4 6 8 RL – Load Resistance – kΩ 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 kΩ TA = 25°C 36 RESET tr 32 28 RESET tf 24 VCC = 5 V CT = 0.1 µF RL = 4.7 kΩ 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 APPLICATION INFORMATION 5V 12 V 8 TL7712A RESET 3 REF CT GND 4 CT 6 8 22 kΩ VCC 7 SENSE 2 5 RESET RESIN 7 2 5 RESET RESIN System Reset TL7705A 10 kΩ 1 3 CT 10 kΩ 6 RESET 1 REF GND 4 CT 0.1 µF 10 kΩ VCC SENSE 10 kΩ 0.1 µF GND 8 7 2 3 C T(F) VCC SENSE RESET RESIN 4 d(s) 10 4 5 TL7712A 6 RESET 1 REF CT GND CT + 1.3t 10 kΩ 0.1 µF –12 V Figure 6. Multiple Power-Supply System Reset Generation 5V 8 VCC 7 SENSE 2 5 RESET RESIN C T(F) + 1.3 t d(s) TL7705A 6 RESET 3 1 CT REF GND 10 4 CT 4 10 kΩ VCC RESET TMS7000 10 kΩ 0.1 µF GND Figure 7. Reset Controller for TMS7000 System 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 VSS TL7702A, TL7705A, TL7709A, TL7712A, TL7715A SUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999 APPLICATION INFORMATION 5V µA7805 INPUT 4.7 kΩ 8 OUTPUT VCC 7 SENSE Input System RESET RESET 5 COMMON 3 CI 25 kΩ TL7705A 6 RESET 1 CT REF GND 4 CT CO S G Q1 2N3994 D 4.7 kΩ 0.1 µF Figure 8. Eliminating Undefined States Using a P-Channel JFET VCC 10 kΩ 750 Ω Q1 2N4036 8 SENSE Input 2.7 kΩ VCC 7 5 RESET SENSE System RESET TL77xxA 2 3 RESIN CT RESET REF 6 1 10 kΩ 1 kΩ GND CT 4 0.1 µF Figure 9. Eliminating Undefined States Using a pnp Transistor POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 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 acknowledgement, 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. 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