Datasheet

ManualsBrandsON SEMICONDUCTOR ManualsPMICsPMIC - system monitor TL 7757 Reset/power-on reset TO 92 3

TL7757, TL7757Y

SUPPLY VOLTAGE SUPERVISOR

AND PRECISION VOLTAGE DETECTOR

SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

available features

Power-On Reset Generator

Automatic Reset Generation After Voltage

Drop

Low Standby Current...20 µA

Reset Output Defined When V

Exceeds 1 V

Complementary Reset Output

Precision Threshold Voltage

4.55 V ±120 mV

High Output Sink Capability...20 mA

Comparator Hysteresis Prevents Erratic

Resets

TYPICAL TIMING DIAGRAM

TYPICAL APPLICATION DIAGRAM

IT+

IT–

res

RESET

Output

Undefined

5 V

0.1 µF

RESET

GND

TL7757

1 kΩ

System

Reset

description

The TL7757 is a monolithic 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, V

, attains a value approaching 1 V, the RESET output becomes active (low) to prevent

undefined operation. If at any time, the supply voltage drops below threshold voltage level (V

IT–

), the RESET

output goes to the active (low) level until the supply undervoltage fault condition is eliminated.

The C-suffix device is characterized for operation from 0°C to 70°C. The I-suffix device is characterized for

operation from –40°C to 85°C. The M-suffix device is characterized for operation from –55°C to 125°C.

AVAILABLE OPTIONS

PACKAGED DEVICES

CHIP FORM

SMALL OUTLINE

(D)

TO-226AA

(LP)

SOT-89

(PK)

CHIP

FORM

(Y)

0°C to 70°C TL7757CD TL7757CLP TL7757CPK

–40°C to 85°C TL7757ID TL7757ILP TL7757IPK

TL7757Y

–55°C to 125°C TL7757MD TL7757MLP —

D and LP packages are available taped and reeled. Add R suffix to device type (e.g., TL7757CDR).

Chips are tested at 25°C.

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.

Summary of content (13 pages)

PAGE 1
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 available features D D D D D D Power-On Reset Generator Automatic Reset Generation After Voltage Drop Low Standby Current . . . 20 µA Reset Output Defined When VCC Exceeds 1 V D D Complementary Reset Output Precision Threshold Voltage 4.55 V ± 120 mV High Output Sink Capability . . .
PAGE 2
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 LP PACKAGE (TOP VIEW) D PACKAGE (TOP VIEW) RESET VCC NC GND 1 8 2 7 3 6 4 5 PK PACKAGE (TOP VIEW) GND NC NC NC NC VCC RESET VCC NC – No internal connection GND RESET GND is in electrical contact with the tab. TL7757Y chip information This chip, when properly assembled, displays characteristics similar to the TL7757C.
PAGE 3
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 equivalent schematic VCC RESET R2 R15 Q8 Q2 Q5 Q11 R12 R3 Q13 R5 R4 R6 C2 Q20 Q9 Q7 R10 R8 R14 Q18 Q4 Q10 C1 Q12 R9 Q1 R7 Q21 R16 Q6 Q3 Q19 Q17 R11 R1 Q15 Q14 Q16 R18 R13 GND ACTUAL DEVICE COMPONENT COUNT Transistors 27 Resistors 20 Capacitors POST OFFICE BOX 655303 2 • DALLAS, TEXAS 75265 3
PAGE 4
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 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.
PAGE 5
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 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.
PAGE 6
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 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.
PAGE 7
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 electrical characteristics at specified free-air temperature PARAMETER TEST CONDITIONS VIT – Negative going input threshold voltage at VCC Negative-going Vh hys‡ 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.
PAGE 8
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 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.
PAGE 9
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 PARAMETER MEASUREMENT INFORMATION VCC TL7757 15 V VCC + 5.5 V TL7757 Pulse Generator A RL = 1 kΩ RESET OUT RESET GND – GND CL = 100 pF (see Note A) NOTE A: Includes jig and probe capacitance. Figure 1. Test Circuit for Output Leakage Current Figure 2. Test Circuit for RESET Output Switching Characteristics 4.8 V VIT + VCC (see Note A) 4.
PAGE 10
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 TYPICAL CHARACTERISTICS† Table of Graphs FIGURE VCC Supply voltage ICC Supply current vs RESET output voltage 4 vs Supply voltage 5 vs Free-air temperature 6 vs Low-level output current 7 vs Free-air temperature 8 VOL Low level output voltage Low-level IOL VIT – Output current vs Supply voltage 9 Input threshold voltage (negative-going VCC) vs Free-air temperature 1
PAGE 11
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 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.
PAGE 12
TL7757, TL7757Y SUPPLY VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR SLVS041D – SEPTEMBER 1991 – REVISED AUGUST 1995 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.
PAGE 13
IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. TI warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with TI’s standard warranty.