TI TL7757CPK

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
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Copyright  1999, Texas Instruments Incorporated