TL7702A, TL7705A, TL7709A, TL7712A, TL7715A
SUPPLY-VOLTAGE SUPERVISORS
SLVS028E APRIL 1983 REVISED JULY 1999
1
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
D
Power-On Reset Generator
D
Automatic Reset Generation After Voltage
Drop
D
Wide Supply-Voltage Range
D
Precision Voltage Sensor
D
Temperature-Compensated Voltage
Reference
D
True and Complement Reset Outputs
D
Externally Adjustable Pulse Duration
description
The TL77xxA family of integrated-circuit supply-voltage supervisors is specifically designed for use as reset
controllers in microcomputer and microprocessor systems. The supply-voltage supervisor monitors the supply
for undervoltage conditions at the SENSE input. During power up, the RESET output becomes active (low)
when V
CC
attains a value approaching 3.6 V. At this point (assuming that SENSE is above V
IT+
), the delay timer
function activates a time delay, after which outputs RESET and RESET go inactive (high and low, respectively).
When an undervoltage condition occurs during normal operation, outputs RESET and RESET go active. To
ensure that a complete reset occurs, the reset outputs remain active for a time delay after the voltage at the
SENSE input exceeds the positive-going threshold value. The time delay is determined by the value of the
external capacitor C
T
: t
d
= 1.3
×
10
4
×
C
T
, where C
T
is in farads (F) and t
d
is in seconds (s).
During power down (assuming that SENSE is below V
IT
), the outputs remain active until the V
CC
falls below
a maximum of 2 V. After this, the outputs are undefined.
An external capacitor (typically 0.1
µ
F for the TL77xxAC and TL77xxAI) must be connected to REF to reduce
the influence of fast transients in the supply voltage.
The TL77xxAC series is characterized for operation from 0
°
C to 70
°
C. The TL77xxAI series is characterized
for operation from 40
°
C to 85
°
C.
AVAILABLE OPTIONS
PACKAGED DEVICES
CHIP
TA
SMALL
OUTLINE
(D)
PLASTIC
DIP
(P)
CHIP
FORM
(Y)
0
°
C to 70
°
C
TL7702ACD
TL7705ACD
TL7709ACD
TL7712ACD
TL7715ACD
TL7702ACP
TL7705ACP
TL7709ACP
TL7712ACP
TL7715ACP
TL7702ACY
TL7705ACY
TL7709ACY
TL7712ACY
TL7715ACY
40
°
C to 85
°
C
TL7702AID
TL7705AID
TL7709AID
TL7712AID
TL7715AID
TL7702AIP
TL7705AIP
TL7709AIP
TL7712AIP
TL7715AIP
--
--
--
--
--
The D package is available taped and reeled. Add the suffix R to the
device type (e.g., TL7702ACDR). Chip forms are tested at 25
°
C.
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.
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.
1
2
3
4
8
7
6
5
REF
RESIN
CT
GND
V
CC
SENSE
RESET
RESET
D OR P PACKAGE
(TOP VIEW)
TL7702A, TL7705A, TL7709A, TL7712A, TL7715A
SUPPLY-VOLTAGE SUPERVISORS
SLVS028E APRIL 1983 REVISED JULY 1999
2
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
functional block diagram
The functional block diagram is shown for illustrative purposes only; the actual circuit includes a trimming
network to adjust the reference voltage and sense-comparator trip point.
RESIN
100
µ
A
R1
(see Note A)
6
5
1
Reference
Voltage
SENSE
GND
8
3
7
2
4
VCC
CT
RESET
RESET
REF
R2
(see Note A)
NOTES: A. TL7702A: R1 = 0
, R2 = open
TL7705A: R1 = 7.8 k
, R2 = 10 k
TL7709A: R1 = 19.7 k
, R2 = 10 k
TL7712A: R1 = 32.7 k
, R2 = 10 k
TL7715A: R1 = 43.4 k
, R2 = 10 k
B. Resistor values shown are nominal.
timing diagram
Output
Undefined
RESET
ÎÎ
ÎÎ
td
Output
Undefined
VCC and SENSE
td
Threshold Voltage
VCC
3.6 V
VCC
2 V
TL7702A, TL7705A, TL7709A, TL7712A, TL7715A
SUPPLY-VOLTAGE SUPERVISORS
SLVS028E APRIL 1983 REVISED JULY 1999
3
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage, V
CC
(see Note 1)
20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
, RESIN
0.3 V to 20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
, SENSE: TL7702A (see Note 2)
0.3 V to 6 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TL7705A
0.3 V to 20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TL7709A
0.3 V to 20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TL7712A, TL7715A
0.3 V to 20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-level output current, I
OH
, RESET
30 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low-level output current, I
OL
, RESET
30 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Notes 3 and 4): D package
97
°
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
P package
127
°
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P package
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. For proper operation of the TL7702A, the voltage applied to the SENSE terminal should not exceed VCC 1 V or 6 V, whichever
is less.
3. Maximum power dissipation is a function of TJ(max),
JA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) TA)/
JA. Operating at the absolute maximum TJ of 150
°
C can impact reliability.
4. 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, VCC
3.5
18
V
High-level input voltage at RESIN, VIH
2
V
Low-level input voltage at RESIN, VIL
0.6
V
TL7702A
0
See Note 2
TL7705A
0
10
Input voltage, SENSE, VI
TL7709A
0
15
V
TL7712A
0
20
TL7715A
0
20
High-level output current, RESET, IOH
16
mA
Low-level output current, RESET, IOL
16
mA
Timing capacitor, CT
10
µ
F
Operating free air temperature range TA
TL77xxAC
0
70
°
C
Operating free-air temperature range, TA
TL77xxAI
40
85
°
C
NOTE 2: For proper operation of the TL7702A, the voltage applied to the SENSE terminal should not exceed VCC 1 V or 6 V, whichever is less.
TL7702A, TL7705A, TL7709A, TL7712A, TL7715A
SUPPLY-VOLTAGE SUPERVISORS
SLVS028E APRIL 1983 REVISED JULY 1999
4
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TL77xxAC
TL77xxAI
UNIT
MIN
TYP
MAX
VOH
High-level output voltage, RESET
IOH = 16 mA
VCC1.5
V
VOL
Low-level output voltage, RESET
IOL = 16 mA
0.4
V
Vref
Reference voltage
TA = 25
°
C
2.48
2.53
2.58
V
TL7702A
2.48
2.53
2.58
N
ti
i
i
t th
h ld
lt
TL7705A
4.5
4.55
4.6
VIT
Negative-going input threshold voltage,
SENSE
TL7709A
TA = 25
°
C
7.5
7.6
7.7
V
SENSE
TL7712A
10.6
10.8
11
TL7715A
13.2
13.5
13.8
TL7702A
10
TL7705A
15
Vhys
Hysteresis, SENSE (VIT+ VIT)
TL7709A
TA = 25
°
C
20
mV
y
TL7712A
35
TL7715A
45
RESIN
VI = 2.4 V to VCC
20
II
Input current
RESIN
VI = 0.4 V
100
µ
A
SENSE
TL7702A
Vref < VI < VCC 1.5 V
0.5
2
IOH
High-level output current, RESET
VO = 18 V
50
µ
A
IOL
Low-level output current, RESET
VO = 0
50
µ
A
ICC
Supply current
All inputs and outputs open
1.8
3
mA
All electrical characteristics are measured with 0.1-
µ
F capacitors connected at REF, CT, and VCC to GND.
switching characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TL77xxAC
TL77xxAI
UNIT
MIN
TYP
MAX
Output pulse duration
CT = 0.1
µ
F
0.65
1.2
2.6
µ
s
Input pulse duration at RESIN
0.4
µ
s
tw(S)
Pulse duration
at SENSE input to switch outputs
VIH = VIT +200 mV,
VIL = VIT 200 mV
2
µ
s
tpd
Propagation delay time, RESIN to RESET
VCC = 5 V
1
µ
s
t
Rise time
RESET
VCC = 5 V
See Note 5
0.2
µ
s
tr
Rise time
RESET
VCC = 5 V,
See Note 5
3.5
µ
s
tf
Fall time
RESET
VCC = 5 V
See Note 5
3.5
µ
s
tf
Fall time
RESET
VCC = 5 V,
See Note 5
0.2
µ
s
All switching characteristics are measured with 0.1-
µ
F capacitors connected at REF and VCC to GND.
NOTE 5: The rise and fall times are measured with a 4.7-k
load resistor at RESET and RESET.
TL7702A, TL7705A, TL7709A, TL7712A, TL7715A
SUPPLY-VOLTAGE SUPERVISORS
SLVS028E APRIL 1983 REVISED JULY 1999
5
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions, T
A
= 25
°
C (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
TL77xxAY
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Vref
Reference voltage
2.53
V
TL7702A
2.53
TL7705A
4.55
VIT
Negative-going input threshold voltage, SENSE
TL7709A
7.6
V
TL7712A
10.8
TL7715A
13.5
TL7702A
10
TL7705A
15
Vhys
Hysteresis, SENSE (VIT+ VIT)
TL7709A
20
mV
y
TL7712A
35
TL7715A
45
II
Input current, SENSE
TL7702A
Vref < VI < VCC 1.5 V
0.5
µ
A
ICC
Supply current
All inputs and outputs open
1.8
mA
All electrical characteristics are measured with 0.1-
µ
F capacitors connected at REF, CT, and VCC to GND.
switching characteristics over recommended operating conditions, T
A
= 25
°
C (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
TL77xxAY
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
td
Output pulse time delay
CT = 0.1
µ
F
1.2
µ
s
All switching characteristics are measured with 0.1-
µ
F capacitors connected at REF and VCC to GND.
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