CHIP FORM
TL7757Y
D
Power-On Reset Generator
D
Automatic Reset Generation After Voltage
Drop
D
Low Standby Current ...20 µA
D
Reset Output Defined When VCC
Exceeds 1 V
D
Complementary Reset Output
D
True and Complementary Reset Outputs
D
Precision Threshold Voltage
4.55 V ±120 mV
D
High Output Sink Capability ...20 mA
D
Comparator Hysteresis Prevents Erratic
Resets
description
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, V
RESET output becomes active (low) to prevent
undefined operation. If the supply voltage drops
below threshold voltage level (V
output goes to the active (low) level until the
supply undervoltage fault condition is eliminated.
, attains a value approaching 1 V , the
CC
), the RESET
IT–
TL7757
SUPPLY-VOLTAGE SUPERVISOR
AND PRECISION VOLTAGE DETECTOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
D PACKAGE
(TOP VIEW)
RESET
V
GND
NC–No internal connection
GND is in electrical contact with the tab.
1
2
CC
NC
3
4
LP PACKAGE
(TOP VIEW)
PK PACKAGE
(TOP VIEW)
V
CC
NC
8
NC
7
NC
6
5
NC
GND
V
CC
RESET
RESETGND
The TL7757C is characterized for operation from
0°C to 70°C. The TL7757I is characterized for
operation from –40°C to 85°C.
T
A
0°C to 70°C TL7757CD TL7757CLP TL7757CPK
–40°C to 85°C TL7757ID TL7757ILP TL7757IPK
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.
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.
SMALL OUTLINE
AVAILABLE OPTIONS
PACKAGED DEVICES
(D)
TO-226AA
(LP)
SOT-89
(PK)
(Y)
Copyright 1999, Texas Instruments Incorporated
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
1
TL7757
SUPPLY-VOLTAGE SUPERVISOR
AND PRECISION VOLTAGE DETECTOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
equivalent schematic
R1
Q1
R2
R3
R4
Q2
R5
R6
Q3 Q4
R7
R10
R8
R9
V
CC
R11
Q5
Q6
Q8
R12
Q7
C1
COMPONENT COUNT
Transistors 27
Resistors 20
Capacitors 2
Q10
R13
ACTUAL DEVICE
Q9
Q11
Q12
C2
Q13
Q14
Q15
Q16
R14
R15
GND
Q17
Q18
R16
RESET
Q19
Q21
Q20
R18
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage range, V
(see Note 1) –0.3 V to 20 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
†
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, T
†
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),
ambient temperature is PD = (TJ(max) – TA)/
3. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
θ
, and TA. The maximum allowable power dissipation at any allowable
θ
JA
JA
. Operating at the absolute maximum TJ of 150°C can impact reliability.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Operating free-air temperature, T
°C
PARAMETER
TEST CONDITIONS
T
UNIT
V
Negative-going input threshold voltage at V
V
V
†
Hysteresis at V
mV
VOLLow-level output voltage
I
20 mA
V
4.3 V
V
IOHHigh-level output current
CC
,
OH
,
A
V
‡
Power-up reset voltage
L
,
V
V
4.3 V
PARAMETER
TEST CONDITIONS
T
UNIT
t
gy,g
CC
µ ,
s
t
gy,g
See Figures 2 and 3
s
trRise time
CC
µ ,
s
tfFall time
See Figures 2 and 3
s
t
CC
s
AND PRECISION VOLTAGE DETECTOR
recommended operating conditions
Supply voltage, V
High-level output voltage, V
Low-level output current, I
p
electrical characteristics at specified free-air temperature
IT–
hys
res
I
CC
†
This is the difference between positive-going input threshold voltage, V
‡
This is the lowest voltage at which RESET
Supply current
CC
p
OH
OL
p
CC
p
p
A
p
becomes active.
CC
=
OL
V
See Figure 1
R
= 2.2 kΩ,
VCC slew rate ≤ 5 V/µs
CC
VCC = 5.5 V 0°C to 70°C 40
,
= 7 V, V
=
IT+
=
CC
= 15 V,
, and negative-going input threshold voltage, V
TL7757
SUPPLY-VOLTAGE SUPERVISOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
MIN MAX UNIT
1 7 V
15 V
20 mA
TL7757C 0 70
TL7757I –40 85
A
25°C 4.43 4.55 4.67
0°C to 70°C 4.4 4.7
25°C 40 50 60
0°C to 70°C 30 70
25°C 0.4 0.8
0°C to 70°C 0.8
25°C 1
0°C to 70°C 1
25°C 0.8 1
0°C to 70°C 1.2
25°C 1400 2000
0°C to 70°C 2000
TL7757C
MIN TYP MAX
.
IT–
°
µ
µA
switching characteristics at specified free-air temperature
PLH
PHL
w(min)
Propagation delay time, low-to-high-level V
output
Propagation delay time, high-to-low-level
output
Minimum pulse duration at VCC for output
response
slew rate ≤ 5 V/µs,
See Figures 2 and 3
V
slew rate ≤ 5 V/µs,
See Figures 2 and 3
A
25°C 3.4 5
0°C to 70°C 5
25°C 2 5
0°C to 70°C 5
25°C 0.4 1
0°C to 70°C 1
25°C 0.05 1
0°C to 70°C 1
25°C 5
0°C to 70°C 5
TL7757C
MIN TYP MAX
µ
µ
µ
µ
µ
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
TL7757
PARAMETER
TEST CONDITIONS
T
UNIT
V
Negative-going input threshold voltage at V
V
V
†
Hysteresis at V
mV
VOLLow-level output voltage
I
20 mA
V
4.3 V
V
IOHHigh-level output current
CC
,
OH
,
A
V
‡
Power-up reset voltage
L
,
V
V
4.3 V
PARAMETER
TEST CONDITIONS
T
UNIT
t
Propagation delay time, low-to-high-level output
CC
µ ,
s
t
Propagation delay time, high-to-low-level output
See Figures 2 and 3
s
trRise time
CC
µ ,
s
tfFall time
See Figures 2 and 3
s
t
CC
s
SUPPLY-VOLTAGE SUPERVISOR
AND PRECISION VOLTAGE DETECTOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
electrical characteristics at specified free-air temperature
IT–
hys
res
I
CC
†
This is the difference between positive-going input threshold voltage, V
‡
This is the lowest voltage at which RESET
p
Supply current
p
CC
p
p
becomes active.
CC
=
OL
V
See Figure 1
R
= 2.2 kΩ,
VCC slew rate ≤ 5 V/µs
CC
VCC = 5.5 V –40°C to 85°C 40
,
= 7 V, V
=
IT+
=
CC
= 15 V,
, and negative-going input threshold voltage, V
A
25°C 4.43 4.55 4.67
–40°C to 85°C 4.4 4.7
25°C 40 50 60
–40°C to 85°C 30 70
25°C 0.4 0.8
–40°C to 85°C 0.8
25°C 1
–40°C to 85°C 1
25°C 0.8 1
–40°C to 85°C 1.2
25°C 1400 2000
–40°C to 85°C 2100
TL7757I
MIN TYP MAX
.
IT–
µ
µA
switching characteristics at specified free-air temperature
V
PLH
PHL
w(min)
p
p
Minimum pulse duration at VCC for output
response
p
p
slew rate ≤ 5 V/µs,
See Figures 2 and 3
V
slew rate ≤ 5 V/µs,
See Figures 2 and 3
A
25°C 3.4 5
–40°C to 85°C 5
25°C 2 5
–40°C to 85°C 5
25°C 0.4 1
–40°C to 85°C 1
25°C 0.05 1
–40°C to 85°C 1
25°C 5
–40°C to 85°C 5
TL7757I
MIN TYP MAX
µ
µ
µ
µ
µ
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
UNIT
ICCSupply current
A
PARAMETER
TEST CONDITIONS
UNIT
electrical characteristics at TA = 25°C
V
IT–
V
hys
V
OL
I
OH
V
res
†
This is the difference between positive-going input threshold voltage, V
‡
This is the lowest voltage at which RESET
switching characteristics at TA = 25°C
t
PLH
t
PHL
t
r
t
f
Negative-going input threshold voltage at V
†
Hysteresis at V
Low-level output voltage IOL = 20 mA, VCC = 4.3 V 0.4 V
High-level output current VCC = 7 V, VOH = 15 V, See Figure 1 µA
‡
Power-up reset voltage RL = 2.2 kΩ, VCC slew rate ≤ 5 V/µs 0.8 V
pp
Propagation delay time, low-to-high-level output
Propagation delay time, high-to-low-level output See Figures 2 and 3 2 µs
Rise time
Fall time See Figures 2 and 3 0.05 µs
CC
becomes active.
CC
VCC = 4.3 V 1400
VCC = 5.5 V
SUPPLY-VOLTAGE SUPERVISOR
AND PRECISION VOLTAGE DETECTOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
MIN TYP MAX
, and negative-going input threshold voltage, V
IT+
MIN TYP MAX
VCC slew rate ≤ 5 V/µs,
See Figures 2 and 3
VCC slew rate ≤ 5 V/µs,
See Figures 2 and 3
TL7757Y
4.55 V
50 mV
.
IT–
TL7757Y
3.4 µs
0.4 µs
TL7757
µ
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
TL7757
SUPPLY-VOLTAGE SUPERVISOR
AND PRECISION VOLTAGE DETECTOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
PARAMETER MEASUREMENT INFORMATION
15 V
A
5.5 V
V
CC
+
–
TL7757
RESET
GND
Figure 1. Test Circuit for Output Leakage Current
V
TL7757
Pulse
Generator
NOTE A: Includes jig and probe capacitance.
0.1 mF
CC
RESET
GND
RL = 1 kΩ
OUT
CL = 100 pF
(see Note A)
Figure 2. T est Circuit for RESET Output Switching Characteristics
t
PLH
4.8 V
V
IT+
90%
50%
10%
t
r
V
(see Note A)
NOTE A: VCC slew rate ≤ 5 µs
CC
4.3 V
RESET
Figure 3. Switching Diagram
V
IT–
t
PHL
90%
50%
10%
t
f
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7757
SUPPLY-VOLTAGE SUPERVISOR
AND PRECISION VOLTAGE DETECTOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
8
7
RESET
TA = 25°C
IO = 0
TYPICAL CHARACTERISTICS
V
CC
I
CC
I
CC
V
OL
V
OL
I
OL
V
IT–
V
res
V
res
SUPPLY VOLTAGE
OUTPUT VOLTAGE
Supply voltage vs RESET output voltage 4
Supply current vs Supply voltage 5
Supply current vs Free-air temperature 6
Low-level output voltage vs Low-level output
current
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
Power-up reset voltage vs Free-air temperature 11
Power-up reset voltage and supply voltage vs Time 12
Propagation delay time 13
vs
†
Table of Graphs
FIGURE
7
10
SUPPLY CURRENT
vs
SUPPLY VOLTAGE
2
TA = 25°C
IO = 0
6
5
4
3
CC
VCC – Supply Voltage – V
V
2
1
0
012345
RESET Output Voltage – V
67
Figure 4
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
1.5
1
CC
IDD – Supply Current – mA
I
0.5
0
01 234
VCC – Supply Voltage – V
Figure 5
56 7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
7
TL7757
SUPPLY-VOLTAGE SUPERVISOR
AND PRECISION VOLTAGE DETECTOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
SUPPLY CURRENT
FREE-AIR TEMPERATURE
1.52
1.48
1.44
1.36
1.32
1.28
0.040
0.036
CC
0.032
IDD – Supply Current – mA
I
0.028
0.024
0.020
RL = 0
1.4
–75 – 50 – 25 0 25 50
TA – Free-Air Temperature – °C
Figure 6
vs
VCC = 4.3 V
VCC = 7 V
VCC = 5.5 V
TYPICAL CHARACTERISTICS
75 100 125
120
110
100
90
80
70
60
50
40
30
20
OL
V
VOL – Low-Level Output Voltage – mV
10
TA = 25°C
0
04812
†
LOW-LEVEL OUTPUT VOLTAGE
vs
LOW-LEVEL OUTPUT CURRENT
VCC = 1 V
VCC = 4.3 V
16 20
IOL – Low-Level Output Current – mA
Figure 7
LOW-LEVEL OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
120
100
OL
V
VOL – Low-Level Output Voltage – mV
VCC = 4.3 V
80
60
40
20
0
–100 – 50 0 50 100 150
TA – Free-Air Temperature – °C
IOL = 20 mA
IOL = 8 mA
IOL = 1 mA
0.02
TA = 25°C
0.018
0.016
0.014
0.012
0.01
0.008
0.006
O
IO – Output Current – mA
I
0.004
0.002
0
0.75 0.8 0.85 0.9
Figure 8
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
OUTPUT CURRENT
vs
SUPPLY VOLTAGE
0.95 1 1.05
VCC – Supply Voltage – V
Figure 9
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7757
SUPPLY-VOLTAGE SUPERVISOR
AND PRECISION VOLTAGE DETECTOR
SLVS041E – SEPTEMBER 1991 – REVISED JULY 1999
INPUT THRESHOLD VOLTAGE
(NEGATIVE-GOING V
FREE-AIR TEMPERATURE
VIT – Input Threshold Voltage – VV
IT–
4.6
4.59
4.58
4.57
4.56
4.55
4.54
4.53
4.52
4.51
4.5
RL = 0
–100 – 50 0 50
TA – Free-Air Temperature – °C
Figure 10
vs
TYPICAL CHARACTERISTICS
)
CC
1000
RL = 2.2 kΩ
950
900
850
800
750
700
res
Vres – Power-Up Reset Voltage – mV
V
650
600
100 150
–100 – 50 0 100
†
POWER-UP RESET VOLTAGE
vs
FREE-AIR TEMPERATURE
50
TA – Free-Air Temperature – °C
Figure 11
150
POWER-UP RESET VOLTAGE
AND SUPPLY VOLTAGE
vs
TIME
2
1.5
1
.5
0
– 0.5
CC
V
, – RESET Voltage and Supply Voltage – V
res
–1
V
0 0.5 1
TA = 25°C
RL = 2.2 kΩ
1.5 2 2.5
t – Time – µs
V
CC
RESET
3
6
5
4
3
2
Voltage – V
1
0
–1
0246 810121416
Figure 12
†
Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
PROPAGATION DELAY TIME
TA = 25°C
RL = 2.2 kΩ
V
CC
RESET
t – Time – µs
Figure 13
18
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
V
CC
V
IT+
V
res
RESET
V
IT–
V
IT+
0
Output
Undefined
0
V
IT–
V
res
TYPICAL APPLICATION DIAGRAM
5 V
0.1 µF
V
CC
RESET
TL7757
GND
1 kΩ
System
Reset
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
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any product or service without notice, and advise customers to obtain the latest version of relevant information
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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
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CRITICAL APPLICA TIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERST OOD TO
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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
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party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1999, Texas Instruments Incorporated
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