TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 D D D D D D D D D D PACKAGE (TOP VIEW) Power-On Reset Generator Automatic Reset Generation After Voltage Drop Low Standby Current . . . 20 µA Reset Output Defined When VCC Exceeds 1 V Complementary Reset Output True and Complementary Reset Outputs Precision Threshold Voltage 4.55 V ± 120 mV High Output Sink Capability . . . 20 mA Comparator Hysteresis Prevents Erratic Resets RESET VCC NC GND 1 8 2 7 3 6 4 5 NC NC NC NC NC –No internal connection LP PACKAGE (TOP VIEW) GND VCC RESET description PK PACKAGE (TOP VIEW) The TL7757 is a supply-voltage supervisor designed for use in microcomputer and microprocessor systems. The supervisor monitors the supply voltage for undervoltage conditions. During power up, when the supply voltage, VCC, attains a value approaching 1 V, the RESET output becomes active (low) to prevent undefined operation. If the supply voltage drops below threshold voltage level (VIT–), the RESET output goes to the active (low) level until the supply undervoltage fault condition is eliminated. VCC GND RESET GND is in electrical contact with the tab. The TL7757C is characterized for operation from 0°C to 70°C. The TL7757I is characterized for operation from –40°C to 85°C. AVAILABLE OPTIONS PACKAGED DEVICES CHIP FORM (Y) TA SMALL OUTLINE (D) TO-226AA (LP) SOT-89 (PK) 0°C to 70°C TL7757CD TL7757CLP TL7757CPK –40°C to 85°C TL7757ID TL7757ILP TL7757IPK TL7757Y D and LP packages are available taped and reeled. Add the suffix R to device type (e.g., TL7757CDR). 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 TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 equivalent schematic VCC RESET R2 R15 Q8 Q2 Q5 Q11 R12 R3 Q13 R5 R4 R6 Q20 Q9 Q7 R10 R8 R14 Q18 Q4 Q10 C1 Q12 R9 Q1 R7 Q21 R16 C2 Q6 Q3 Q19 Q17 R11 R1 Q15 Q14 Q16 R18 R13 GND ACTUAL DEVICE COMPONENT COUNT Transistors 27 Resistors 20 Capacitors 2 absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 V Offstate output voltage range (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 V Output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Package thermal impedance, θJA (see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 156°C/W PK package . . . . . . . . . . . . . . . . . . . . . . . . . . . 52°C/W Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 network terminal ground. 2. 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. 3. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 recommended operating conditions MIN MAX 1 7 Supply voltage, VCC UNIT V High-level output voltage, VOH 15 V Low-level output current, IOL 20 mA TL7757C Operating free-air free air temperature, temperature TA TL7757I 0 70 –40 85 °C electrical characteristics at specified free-air temperature PARAMETER TEST CONDITIONS VIT – Negative going input threshold voltage at VCC Negative-going Vhys† Hysteresis at VCC VOL Low level output voltage Low-level IOL = 20 mA mA, 3V VCC = 4 4.3 IOH High level output current High-level VCC = 7 V,, See Figure 1 VOH = 15 V,, Vres‡ Power up reset voltage Power-up RL = 2.2 kΩ,, VCC slew rate ≤ 5 V/µs ICC Supply current TA TL7757C MIN TYP MAX 25°C 4.43 4.55 4.67 0°C to 70°C 4.4 25°C 40 0°C to 70°C 30 25°C V 4.7 50 60 70 0.4 0°C to 70°C mV 0.8 V 0.8 25°C 1 0°C to 70°C 1 25°C 0.8 0°C to 70°C µA 1 V 1.2 25°C VCC = 4 4.3 3V UNIT 1400 0°C to 70°C 2000 µA 2000 VCC = 5.5 V 0°C to 70°C 40 † This is the difference between positive-going input threshold voltage, VIT+, and negative-going input threshold voltage, VIT –. ‡ This is the lowest voltage at which RESET becomes active. switching characteristics at specified free-air temperature PARAMETER TEST CONDITIONS TA 25°C tPLH Propagation g delay y time,, low-to-high-level g output VCC slew rate ≤ 5 V/µs, µ , See Figures 2 and 3 tPHL Propagation g delay y time,, high-to-low-level g output See Figures 2 and 3 tr Rise time VCC slew rate ≤ 5 V/µs, µ , See Figures 2 and 3 tf Fall time See Figures 2 and 3 tw(min) ( i ) Minimum pulse duration at VCC for output response POST OFFICE BOX 655303 TL7757C MIN TYP MAX 3.4 5 0°C to 70°C 25°C 5 2 0°C to 70°C 25°C 5 0.4 0°C to 70°C 25°C 5 1 1 0.05 1 0°C to 70°C 1 25°C 5 0°C to 70°C 5 • DALLAS, TEXAS 75265 UNIT µs µs µs µs µs 3 TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 electrical characteristics at specified free-air temperature PARAMETER TEST CONDITIONS VIT – Negative going input threshold voltage at VCC Negative-going Vhys† Hysteresis at VCC VOL Low level output voltage Low-level IOL = 20 mA mA, VCC = 4 4.3 3V IOH High level output current High-level VCC = 7 V,, See Figure 1 VOH = 15 V,, Vres‡ Power up reset voltage Power-up RL = 2.2 kΩ,, VCC slew rate ≤ 5 V/µs ICC Supply current VCC = 4 4.3 3V TA TL7757I MIN TYP MAX 4.55 4.67 25°C 4.43 –40°C to 85°C 4.4 25°C 40 –40°C to 85°C 30 25°C 4.7 50 60 70 0.4 –40°C to 85°C 0.8 0.8 25°C 1 –40°C to 85°C 1 25°C 0.8 –40°C to 85°C 1 1.2 25°C 1400 –40°C to 85°C UNIT V mV V µA V 2000 2100 µA VCC = 5.5 V –40°C to 85°C 40 † This is the difference between positive-going input threshold voltage, VIT+, and negative-going input threshold voltage, VIT –. ‡ This is the lowest voltage at which RESET becomes active. switching characteristics at specified free-air temperature PARAMETER TEST CONDITIONS TA 25°C tPLH time low-to-high-level low to high level output Propagation delay time, VCC slew rate ≤ 5 V/µs, µ , See Figures 2 and 3 tPHL Propagation delay time, time high-to-low-level high to low level output See Figures 2 and 3 tr Rise time VCC slew rate ≤ 5 V/µs, µ , See Figures 2 and 3 tf Fall time See Figures 2 and 3 tw(min) ( i ) Minimum pulse duration at VCC for output response 4 POST OFFICE BOX 655303 TL7757I MIN TYP MAX 3.4 5 –40°C to 85°C 25°C 5 2 –40°C to 85°C 25°C 5 0.4 –40°C to 85°C 25°C 5 1 1 0.05 1 –40°C to 85°C 1 25°C 5 –40°C to 85°C 5 • DALLAS, TEXAS 75265 UNIT µs µs µs µs µs TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 electrical characteristics at TA = 25°C PARAMETER TEST CONDITIONS VIT – Vhys† Negative-going input threshold voltage at VCC VOL IOH Low-level output voltage Vres‡ ICC TL7757Y MIN TYP MAX 4.55 Hysteresis at VCC High-level output current IOL = 20 mA, VCC = 7 V, VCC = 4.3 V VOH = 15 V, Power-up reset voltage RL = 2.2 kΩ, VCC slew rate ≤ 5 V/µs Supply current VCC = 4.3 V VCC = 5.5 V UNIT V 50 mV 0.4 V µA See Figure 1 0.8 V 1400 µA † This is the difference between positive-going input threshold voltage, VIT+, and negative-going input threshold voltage, VIT –. ‡ This is the lowest voltage at which RESET becomes active. switching characteristics at TA = 25°C PARAMETER TEST CONDITIONS tPLH Propagation delay time, low-to-high-level output VCC slew rate ≤ 5 V/µs, See Figures 2 and 3 tPHL Propagation delay time, high-to-low-level output See Figures 2 and 3 tr Rise time VCC slew rate ≤ 5 V/µs, See Figures 2 and 3 tf Fall time See Figures 2 and 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TL7757Y MIN TYP MAX UNIT 3.4 µs 2 µs 0.4 µs 0.05 µs 5 TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 PARAMETER MEASUREMENT INFORMATION 15 V VCC A TL7757 + 5.5 V RESET – GND Figure 1. Test Circuit for Output Leakage Current VCC TL7757 Pulse Generator RL = 1 kΩ RESET 0.1 mF OUT GND CL = 100 pF (see Note A) NOTE A: Includes jig and probe capacitance. Figure 2. Test Circuit for RESET Output Switching Characteristics 4.8 V VIT + VCC (see Note A) 4.3 V VIT – tPLH tPHL 90% 50% 10% RESET 90% 50% 10% tr tf NOTE A: VCC slew rate ≤ 5 µs Figure 3. Switching Diagram 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 TYPICAL CHARACTERISTICS† Table of Graphs FIGURE VCC ICC Supply voltage vs RESET output voltage 4 Supply current vs Supply voltage 5 ICC Supply current vs Free-air temperature 6 VOL Low-level output voltage vs Low-level output current 7 Low-level output voltage vs Free-air temperature 8 Output current vs Supply voltage 9 Input threshold voltage (negative-going VCC) vs Free-air temperature 10 VOL IOL VIT – Vres Vres Power-up reset voltage vs Free-air temperature 11 Power-up reset voltage and supply voltage vs Time 12 Propagation delay time 13 SUPPLY CURRENT vs SUPPLY VOLTAGE SUPPLY VOLTAGE vs RESET OUTPUT VOLTAGE 8 2 IIDD CC – Supply Current – mA 7 V VCC CC – Supply Voltage – V TA = 25°C IO = 0 TA = 25°C IO = 0 6 5 4 3 2 1.5 1 0.5 1 0 0 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 VCC – Supply Voltage – V RESET Output Voltage – V Figure 4 Figure 5 † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 TYPICAL CHARACTERISTICS† SUPPLY CURRENT vs FREE-AIR TEMPERATURE LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 120 1.52 IIDD CC – Supply Current – mA 1.44 1.4 1.36 1.32 1.28 0.040 0.036 VCC = 7 V 0.032 0.028 VCC = 5.5 V 0.024 0.020 –75 – 50 – 25 TA = 25°C 110 VCC = 4.3 V VOL VOL – Low-Level Output Voltage – mV 1.48 RL = 0 100 90 VCC = 1 V 80 70 60 VCC = 4.3 V 50 40 30 20 10 0 0 25 75 50 100 0 125 4 8 12 16 IOL – Low-Level Output Current – mA TA – Free-Air Temperature – °C Figure 7 Figure 6 OUTPUT CURRENT vs SUPPLY VOLTAGE LOW-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 0.02 120 TA = 25°C IOL = 20 mA 0.018 100 0.016 IIO O – Output Current – mA VOL VOL – Low-Level Output Voltage – mV VCC = 4.3 V 80 60 IOL = 8 mA 40 0.014 0.012 0.01 0.008 0.006 0.004 20 0.002 IOL = 1 mA 0 –100 – 50 0 50 100 150 0 0.75 TA – Free-Air Temperature – °C 0.8 0.85 0.9 0.95 1 VCC – Supply Voltage – V Figure 9 Figure 8 † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. 8 20 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1.05 TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 TYPICAL CHARACTERISTICS† INPUT THRESHOLD VOLTAGE (NEGATIVE-GOING VCC) vs FREE-AIR TEMPERATURE POWER-UP RESET VOLTAGE vs FREE-AIR TEMPERATURE 1000 4.6 RL = 2.2 kΩ RL = 0 950 Vres – Power-Up Reset Voltage – mV Vres VIT– VIT – Input Threshold Voltage – V 4.59 4.58 4.57 4.56 4.55 4.54 4.53 4.52 900 850 800 750 700 650 4.51 4.5 –100 100 – 50 0 50 TA – Free-Air Temperature – °C 600 –100 150 – 50 Figure 10 100 150 PROPAGATION DELAY TIME 2 6 TA = 25°C RL = 2.2 kΩ TA = 25°C RL = 2.2 kΩ VCC 5 4 1 Voltage – V Vres, V CC– RESET Voltage and Supply Voltage – V 50 Figure 11 POWER-UP RESET VOLTAGE AND SUPPLY VOLTAGE vs TIME 1.5 0 TA – Free-Air Temperature – °C VCC .5 RESET 3 RESET 2 0 1 – 0.5 0 –1 –1 0 0.5 1 1.5 2 t – Time – µs 2.5 3 0 2 Figure 12 4 6 8 10 12 t – Time – µs 14 16 18 Figure 13 † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999 APPLICATION INFORMATION TYPICAL TIMING DIAGRAM VIT– VCC VIT+ VIT+ TYPICAL APPLICATION DIAGRAM VIT– 5V Vres Vres 0 0.1 µF VCC RESET TL7757 RESET GND Output Undefined 0 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 kΩ System Reset 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. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. 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 1999, Texas Instruments Incorporated