TL7759 SUPPLY-VOLTAGE SUPERVISORS SLVS042D – JANUARY 1991 – REVISED JULY 1999 D D D D D D D D, P, OR PW PACKAGE (TOP VIEW) Power-On Reset Generator Automatic Reset Generation After Voltage Drop Precision Input Threshold Voltage . . . 4.55 V ±120 mV Low Standby Current . . . 20 µA Reset Outputs Defined When VCC Exceeds 1 V True and Complementary Reset Outputs Wide Supply-Voltage Range . . . 1 V to 7 V NC NC NC GND 1 8 2 7 3 6 4 5 RESET RESET NC VCC NC – No internal connection description The TL7759 is a supply-voltage supervisor designed for use as a reset controller 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 and RESET outputs become active (high and low, respectively) to prevent undefined operation. If the supply voltage drops below the input threshold voltage level (VIT– ), the reset outputs go to the reset active state until the supply voltage has returned to its nominal value (see timing diagram). The TL7759C is characterized for operation from 0°C to 70°C. AVAILABLE OPTIONS PACKAGED DEVICES TA SMALL OUTLINE (D) PLASTIC DIP (P) SHRINK SMALL OUTLINE (PW) CHIP FORM (Y) 0°C to 70°C TL7759CD TL7759CP TL7759CPW TL7759Y The D and PW packages are available taped and reeled. Add the suffix R to the device type (e.g., TL7759CDR). Chip forms are tested at 25°C. functional block diagram 5 + 7 – 8 VCC RESET RESET Reference Voltage 4 GND 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 TL7759 SUPPLY-VOLTAGE SUPERVISORS SLVS042D – JANUARY 1991 – REVISED JULY 1999 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V Off-state output voltage range: RESET voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 V RESET voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 V Low-level output current, IOL (RESET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA High-level output current, IOH (RESET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10 mA Package thermal impedance, θJA (see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W P package . . . . . . . . . . . . . . . . . . . . . . . . . . . 127°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . 149°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 the network ground terminal. 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. recommended operating conditions Supply voltage, VCC MIN MAX 1 7 15 Transistor off RESET voltage Output voltage, voltage VO (see Note 4) Transistor off RESET voltage Low-level output current, IOL RESET High-level output current, IOH RESET Operating free-air temperature, TA TL7759C 0 0 UNIT V V 24 mA –8 mA 70 °C NOTE 4: RESET output must not be pulled down below GND potential. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) TL7759C PARAMETER VOL VOH TEST CONDITIONS Low-level output voltage RESET High-level output voltage RESET IOL = 24 mA IOH = –8 mA VCC = 4 4.3 3V VIT IT– Input threshold voltage g (negative-going VCC) TA = 25°C TA = 0°C to 70°C Vres§ Power up reset voltage Power-up RL = 2.2 2 2 kΩ Vhys¶ Hysteresis at VCC input TA = 25°C TA = 0°C to 70°C IOH IOL High-level output current RESET Low-level output current RESET ICC Supply current MIN VCC–1 4.43 TYP‡ MAX 0.4 0.8 4.55 4.67 4.7 0.8 1 1.2 40 50 60 30 VCC = 7 V V, See Figure 1 VOH = 15 V VOL = 0 V No load VCC = 4.3 V VCC = 5.5 V 70 1400 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 V V mV 1 µA –1 µA 2000 ‡ Typical values are at TA = 25°C. § This is the lowest voltage at which RESET becomes active, VCC slew rate ≤ 5 V/µs. ¶ This is the difference between positive-going input threshold voltage, VIT+, and negative-going input threshold voltage, VIT–. 2 V V 4.4 TA = 25°C TA = 0°C to 70°C UNIT 40 µA TL7759 SUPPLY-VOLTAGE SUPERVISORS SLVS042D – JANUARY 1991 – REVISED JULY 1999 electrical characteristics, TA = 25°C (unless otherwise noted) TL7759Y PARAMETER TEST CONDITIONS VOL Low-level output voltage VIT– Vres† Input threshold voltage (negative-going VCC) RESET Power-up reset voltage VCC = 4.3 V, MIN IOL = 24 mA RL = 2.2 kΩ TYP MAX UNIT 0.4 V 4.55 V 0.8 V Vhys‡ Hysteresis at VCC input 50 ICC Supply current VCC = 4.3 V, No load 1400 † This is the lowest voltage at which RESET becomes active, VCC slew rate ≤ 5 V/µs. ‡ This is the difference between positive-going input threshold voltage, VIT+, and negative-going input threshold voltage, VIT–. mV µA timing diagram VCC VIT+ Vres VIT– ÇÇ ÇÇ ÇÇ ÇÇ ÇÇ ÇÇ 0 RESET Output Undefined for VCC Less Than 1 V VIT – Vres VIT+ 0 Output Undefined switching characteristics at TA = 25°C (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) TEST CONDITIONS TL7759C MIN MAX UNIT tPLH Propagation delay time, low-to high-level output VCC RESET See Figures 2 and 3§ 5 µs tPHL Propagation delay time, high-to low-level output VCC RESET See Figures 2 and 4 5 µs tr Rise time RESET See Figures 2 and 4§ 1 µs tf Fall time RESET See Figures 2 and 4 1 µs tw(min) Minimum pulse duration RESET See Figures 2 and 4 VCC 5 µs § VCC slew rate ≤ 5 V/µs POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TL7759 SUPPLY-VOLTAGE SUPERVISORS SLVS042D – JANUARY 1991 – REVISED JULY 1999 PARAMETER MEASUREMENT INFORMATION 15 V VCC RESET + 7V A TL7759 _ RESET GND A Figure 1. Test Circuit for Output Leakage Current 4.8 V VCC (see Note A) 4.3 V tPLH tPHL 90% 90% RESET 50% 50% 10% 10% tr tf NOTE A: VCC slew rate ≤ 5 V/µs. Figure 2. Switching Diagram VCC Pulse Generator TL7759 0.1 mF RESET GND RL = 1 kΩ CL = 100 pF† † CL Includes jig and probe capacitance. Figure 3. Test Circuit for RESET Output Switching Characteristics VCC Pulse Generator 0.1 mF RL= 1k Ω RESET TL7759 GND CL = 100 pF† † CL Includes jig and probe capacitance. Figure 4. Test Circuit for RESET Output Switching Characteristics 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TL7759 SUPPLY-VOLTAGE SUPERVISORS SLVS042D – JANUARY 1991 – REVISED JULY 1999 APPLICATION INFORMATION 5V 0.1 µF 5 VCC RESET 7 System Reset TL7759 RESET 8 1 kΩ GND 4 Figure 5. Power-Supply System Reset Generation POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 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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