Texas Instruments TL7759CPWR, TL7759CPWLE, TL7759CPS, TL7759CP, TL7759CDR Datasheet
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TL7759
SUPPLY-VOLTAGE SUPERVISORS
SLVS042D – JANUARY 1991 – REVISED JULY 1999
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Power-On Reset Generator
D
Automatic Reset Generation After Voltage
Drop
D
Precision Input Threshold
Voltage . . . 4.55 V ±120 mV
D
Low Standby Current ...20 µA
D
Reset Outputs Defined When V
CC
Exceeds 1 V
D
True and Complementary Reset Outputs
D
Wide Supply-Voltage Range ...1 V to 7 V
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 (V
IT–
), 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
T
A
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
GND
RESET
RESET
V
CC
–
+
5
7
8
4
Reference
Voltage
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.
1
2
3
4
8
7
6
5
NC
NC
NC
GND
RESET
RESET
NC
V
CC
D, P, OR PW PACKAGE
(TOP VIEW)
NC – No internal connection
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.
TL7759
SUPPLY-VOLTAGE SUPERVISORS
SLVS042D – JANUARY 1991 – REVISED JULY 1999
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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, I
OL
(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, T
stg
–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),
θ
JA
, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) – TA)/
θ
JA
. 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
MIN MAX UNIT
Supply voltage, V
CC
1 7 V
p
Transistor off RESET voltage
15
Output voltage, V
O
(see Note 4)
Transistor off RESET voltage 0
V
Low-level output current, I
OL
RESET
24 mA
High-level output current, I
OH
RESET –8 mA
Operating free-air temperature, T
A
TL7759C 0 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
TEST CONDITIONS
MIN
TYP
‡
MAX
UNIT
V
OL
Low-level output voltage
RESET
IOL = 24 mA 0.4 0.8 V
V
OH
High-level output voltage RESET
V
CC
=
4.3 V
IOH = –8 mA VCC–1 V
Input threshold voltage
TA = 25°C 4.43 4.55 4.67
V
IT–
g
(negative-going VCC)
TA = 0°C to 70°C
4.4 4.7
V
p
TA = 25°C 0.8 1
V
res
§
Power-up reset voltage
R
L
= 2.2
kΩ
TA = 0°C to 70°C 1.2
V
p
TA = 25°C 40 50 60
V
hys
¶
Hysteresis at V
CC
input
TA = 0°C to 70°C 30 70
mV
I
OH
High-level output current
RESET
VOH = 15 V 1 µA
I
OL
Low-level output current RESET
V
CC
= 7 V,
See Figure 1
VOL = 0 V –1 µA
pp
VCC = 4.3 V 1400 2000
ICCSupply current
No load
VCC = 5.5 V 40
µ
A
‡
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, V
IT+
, and negative-going input threshold voltage, V
IT–
.
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