TL7702-705-733B [TI]
SUPPLY-VOLTAGE SUPERVISORS; 电源电压监事
| 型号： | TL7702-705-733B |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | SUPPLY-VOLTAGE SUPERVISORS |
| 文件： | 总9页 (文件大小：140K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002
TL77xxBC . . . D OR P PACKAGE
TL7705BM . . . JG PACKAGE
TL7705BQ . . . D PACKAGE
(TOP VIEW)
Power-On Reset Generator
Automatic Reset Generation After
Voltage Drop
RESET Output Defined From V
Precision Voltage Sensor
≥ 1 V
CC
REF
RESIN
CT
V
CC
1
2
3
4
8
7
6
5
SENSE
RESET
RESET
Temperature-Compensated Voltage
Reference
GND
True and Complement Reset Outputs
Externally Adjustable Pulse Duration
TL7705BM . . . U PACKAGE
(TOP VIEW)
description
1
2
3
4
5
NC
REF
RESIN
CT
NC
V
SENSE
RESET
RESET
10
9
The TL7702B, TL7705B, and TL7733B are
integrated-circuit supply-voltage supervisors
designed for use as reset controllers in
microcomputerandmicroprocessorsystems. The
supply-voltage supervisor monitors the supply for
undervoltage conditions at the SENSE input.
During power up, the RESET output becomes
CC
8
7
GND
6
NC – No internal connection
active (low) when
approaching 1 V. As V
(assuming that SENSE is above V ), the delay
V
attains
approaches 3 V
a
value
CC
CC
TL7705BM . . . FK PACKAGE
(TOP VIEW)
T+
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
3
2 1 20 19
18
NC
NC
RESIN
NC
4
5
6
7
8
SENSE
NC
17
16
15
14
RESET
NC
CT
NC
9 10 11 12 13
the value of the external capacitor C :
T
4
t ≈ 2.6 × 10 × C , where C is in farads (F) and
d
T
T
t is in seconds (s).
d
An external capacitor (typically 0.1 µF) must be
connected to REF to reduce the influence of fast
transients in the supply voltage.
NC – No internal connection
The TL7702BC, TL7705BC, and TL7733BC are characterized for operation from 0°C to 70°C. The TL7702BI,
TL7705BI, and TL7733BI are characterized for operation from –40°C to 85°C. The TL7705BQ is characterized
for operation from –40°C to 125°C. The TL7705BM is characterized for operation from –55°C to 125°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 2002, 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
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002
AVAILABLE OPTIONS
PACKAGED DEVICES
CERAMIC
SMALL
OUTLINE
(D)
CHIP
CARRIER
(FK)
PLASTIC
DIP
CERAMIC
FLATPACK
(U)
T
A
DIP
(JG)
(P)
TL7702BCD
TL7705BCD
TL7733BCD
TL7702BID
TL7705BID
TL7733BID
TL7705BQD
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
TL7702BCP
TL7705BCP
TL7733BCP
TL7702BIP
TL7705BIP
TL7733BIP
—
—
0°C to 70°C
—
—
—
–40°C to 85°C
—
—
—
–40°C to 125°C
–55°C to 125°C
TL7705BMFK TL7705BMJG
—
TL7705BMU
The D package is available taped and reeled. Add the suffix R to device type (e.g., TL7702BCDR).
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.
8
V
CC
Reference
Voltage 1
≈70 µA
6
5
3
7
RESET
RESET
CT
Reference
Voltage 2
V
x
SENSE
R1
(see Note A)
R2
(see Note A)
2
4
RESIN
GND
1
REF
Pin numbers shown are for the D, JG, and P packages.
NOTE A: TL7702B: R1 = 0 Ω, R2 = open, V = V
x
REF1
TL7705B: R1 = 23 kΩ, R2 = 10 kΩ, nominal, V ≈1.43 V
x
TL7733B: R1 = 11.3 kΩ, R2 = 10 kΩ, nominal, V ≈1.43 V
x
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002
typical timing diagram
V
and
CC
SENSE
V
IT–
V
IT+
V
IT–
V
IT+
V
res
V
res
0
RESET
t
t
d
d
Output
Undefined
Output
Undefined
0
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V
CC
Input voltage range, V : RESIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 V
I
SENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 V
High-level output current, I
(RESET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA
OH
Low-level output current, I (RESET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA
OL
Package thermal impedance, θ (see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
JA
P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85°C/W
Case temperature for 60 seconds, T : FK package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG or U packages . . . . . . . . . . . . . . 300°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P packages . . . . . . . . . . . . . . . . 260°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
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 T (max), θ , and T . The maximum allowable power dissipation at any allowable
J
JA
A
ambient temperature is P = (T (max) – T )/θ . Operating at the absolute maximum T of 150°C can affect reliability.
D
J
A
JA
J
3. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN
3.6
2
MAX
18
UNIT
V
V
V
V
V
Supply voltage
CC
High-level input voltage
Low-level input voltage
Input voltage
RESIN
18
V
IH
RESIN
0
0.8
18
V
IL
SENSE
0
V
I
I
I
High-level output current
Low-level output current
RESET
20
mA
mA
OH
RESET
20
OL
TL77xxBC
TL77xxBI
TL7705BQ
TL7705BM
–0
–40
–40
–55
70
85
T
A
Operating free-air temperature range
°C
125
125
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002
electrical characteristics over recommended operating conditions (unless otherwise noted)
TL77xxBC
TL77xxBI
TL7705BQ
†
PARAMETER
UNIT
TEST CONDITIONS
MIN
–1.5
TYP
MAX
V
V
High-level output voltage, RESET
Low-level output voltage, RESET
Reference voltage, REF
I
I
I
= –16 mA
V
V
V
V
OH
OH
OL
ref
CC
= 16 mA
0.4
OL
V
ref
= 500 µA,
T
A
= 25°C
2.48
2.53
2.58
TL7702B
2.505
4.5
2.53 2.555
TL7705B
TL7733B
TL7702B
TL7705B
TL7733B
TL7702B
TL7705B
TL7733B
T
= 25°C
4.55
3.08
2.53
4.55
3.08
10
4.6
3.13
2.58
4.65
3.16
A
Negative-going
3.03
2.48
4.45
3
V
IT–
V
input threshold voltage
at SENSE input
‡
T
A
= full range
Hysteresis, SENSE
V
V
V
I
= 3.6 V to 18 V,
T
A
= 25°C
= 25°C
30
mV
hys
CC
(V
IT+
– V
)
IT–
10
§
Power-up reset voltage
RESIN
SENSE
at RESET = 2 mA,
T
A
1
–10
–2
V
OL
res
V = 0.4 V to V
CC
I
I
I
Input current
µA
TL7702B
V = V to 18 V
–0.1
I
ref
I
I
High-level output current, RESET
Low-level output current, RESET
V
V
V
V
= 18 V,
See Figure 1
See Figure 1
RESIN ≥ 2 V
50
µA
µA
OH
O
= 0 V,
–50
3
OL
O
= 15 V,
1.8
SENSE
= 18 V,
I
Supply current
mA
CC
‡
= full range
3.5
T
A
CC
†
‡
§
All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT, and V
Full range is 0°C to 70°C for the C-suffix devices, –40°C to 85°C for the I-suffix devices, and –40°C to 125°C for the Q-suffix device.
This is the lowest voltage at which RESET becomes active.
to GND.
CC
switching characteristics, V
= 5 V, C open, T = 25°C
T A
CC
TL77xxBC
TL77xxBI
TL7705BQ
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
Propagation delay time from
low- to high-level output
t
t
RESIN
RESIN
RESET
RESET
See Figures 1, 2, and 3
See Figures 1, 2, and 3
270
500
ns
ns
PLH
Propagation delay time from
high- to low-level output
270
500
PHL
150
100
RESIN
t
Effective pulse duration
See Figure 2
ns
ns
ns
w
SENSE
t
r
t
f
t
r
t
f
Rise time
Fall time
Rise time
Fall time
75
200
150
50
See Figures 1 and 3
See Figures 1 and 3
RESET
RESET
150
75
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002
electrical characteristics over recommended operating conditions (unless otherwise noted)
TL7705BM
†
PARAMETER
UNIT
TEST CONDITIONS
MIN
–1.5
TYP
MAX
V
V
High-level output voltage, RESET
Low-level output voltage, RESET
Reference voltage, REF
I
I
I
= –16 mA
V
CC
V
V
V
OH
OH
OL
ref
= 16 mA
0.4
OL
V
ref
= 500 µA,
T
A
= 25°C
2.48
2.505
4.5
2.53
2.58
TL7702B
2.53 2.555
T
= 25°C
A
Negative-going
input threshold voltage
at SENSE input
TL7705B
TL7702B
TL7705B
TL7702B
TL7705B
4.55
2.53
4.55
10
4.6
2.58
4.65
V
IT–
V
2.48
4.45
T
= –55°C to 125°C
A
Hysteresis, SENSE
V
hys
V
= 3.6 V to 18 V,
T
A
= 25°C
= 25°C
mV
V
CC
(V
IT+
– V
)
IT–
30
‡
Power-up reset voltage
1
–10
–2
50
–50
3
V
res
I
at RESET = 2 mA,
T
A
OL
V = 0.4 V to V
RESIN
Input current
I
CC
– 1.5 V
I
I
µA
SENSE
TL7702B
V = V to V
–0.1
I
ref
CC
I
I
High-level output current, RESET
Low-level output current, RESET
V
V
V
V
= 18 V
µA
µA
OH
O
= 0
OL
O
1.8
= 15 V,
RESIN ≥ 2 V
T = –55°C to 125°C
A
SENSE
I
Supply current
mA
CC
4
= 18 V,
CC
†
‡
All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT, and V
This is the lowest value at which RESET becomes active.
to GND.
CC
switching characteristics, V
= 5 V, C open, T = 25°C
T A
CC
TL7705BM
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
Propagation delay time from
low- to high-level output
t
t
RESIN
RESIN
RESET
See Figures 1, 2, and 3
See Figures 1, 2, and 3
270
500*
ns
ns
PLH
Propagation delay time from
high- to low-level output
RESET
270
500*
PHL
150
100
RESIN
t
Effective pulse duration
See Figure 2
ns
ns
ns
w
SENSE
t
r
t
f
t
r
t
f
Rise time
Fall time
Rise time
Fall time
75*
200*
150*
50*
See Figures 1 and 3
See Figures 1 and 3
RESET
RESET
150
75
* On products compliant to MIL-PRF-38535, these parameters are not production tested.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002
PARAMETER MEASUREMENT INFORMATION
5 V
5 V
V
CC
R
L
(see Note A)
DUT
RESET
DUT
15 pF
RESET
(see Note B)
R
15 pF
L
(see Note A)
(see Note B)
GND
RESET OUTPUT CONFIGURATION
RESET OUTPUT CONFIGURATION
NOTES: A. For I
and I , R = 10 kΩ. For all switching characteristics, R = 511 Ω.
OL
OH
L
L
B. This figure includes jig and probe capacitance.
Figure 1. RESET and RESET Output Configurations
t
t
w
w
V
T
V
T
V
T
+ 2 V
5 V
2.5 V
0 V
– 2 V
RESIN
SENSE
WAVEFORMS
Figure 2. Input Pulse Definition
Voltage
Fault
V
IT+
V
IT+
V
IT–
SENSE
0 V
V
IH
Undefined
RESIN
RESET
2 V
0.8 V
V
V
IL
t
t
t
f
r
PLH
OH
90%
90%
90%
50%
10%
90%
t
t
t
t
d
d
f
d
50%
RESET
10%
r
10%
10%
10%
V
OL
t
t
PHL
Figure 3. Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002
†
TYPICAL CHARACTERISTICS
DEASSERTION TIME
vs
ASSERTION TIME
vs
LOAD RESISTANCE
LOAD RESISTANCE
700
600
500
20
18
16
V
= 5 V
= 0.1 µF
= 10 pF
= 25°C
V
= 5 V
= 0.1 µF
= 10 pF
= 25°C
CC
T
L
CC
T
L
RESET t
r
C
C
T
C
C
T
A
A
RESET t
r
RESET t
f
400
300
14
12
RESET t
f
200
100
10
8
RESET t
6
f
RESET t
r
0
6
0
2
4
8
10
0
2
4
6
8
10
R
– Load Resistance – kΩ
R
– Load Resistance – kΩ
L
L
Figure 4
Figure 5
ASSERTION TIME
vs
DEASSERTION TIME
vs
LOAD CAPACITANCE
LOAD CAPACITANCE
36
30
24
18
12
6
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
0.3
V
C
R
= 5 V
= 0.1 µF
= 4.7 kΩ
= 25°C
V
C
R
= 5 V
CC
T
L
CC
T
L
= 0.1 µF
= 4.7 kΩ
= 25°C
T
A
T
A
RESET t
r
RESET t and RESET t
f
r
RESET t
f
0
25
50
C
75
100 125 150 175 200
0
25
50
75
100 125 150 175 200
C
L
– Load Capacitance – pF
– Load Capacitance – pF
L
Figure 6
Figure 7
†
For proper operation, both RESET and RESET should be terminated with resistors of similar value. Failure to do so may cause unwanted
plateauing in either output waveform during switching.
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL7702B, TL7705B, TL7733B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037L – SEPTEMBER 1989 – REVISED MAY 2002
APPLICATION INFORMATION
V
S
System Supply
8
10 kΩ
V
CC
RESET
7
2
5
6
To System
RESET
SENSE
Reset Input
(from system)
RESIN
REF
CT
1
3
R
T
To System
RESET
RESET
GND
(see text)
10 kΩ
C
0.1 µF
4
T
Figure 8. System Reset Controller With Undervoltage Sensing
When the TL770xB SENSE terminal is used to monitor V , a current-limiting resistor in series with C is
CC
T
recommended. During normal operation, the timing capacitor is charged by the onboard current source to
approximately V or an internal voltage clamp (≈7.1-V zener), whichever is less. When the circuit is then subjected
CC
to an undervoltage condition during which V
is rapidly slewed down, the voltage on CT exceeds that on V . This
CC
CC
forward biases a secondary path internally, which falsely activates the outputs. A fault is indicated when V
drops
CC
below V
, not when V
falls below V
.
(CT)
SENSE
T–
Texas Instruments performs a 100% electrical screen to verify that the outputs do not switch with 1 mA forced into
the CT terminal. Adding the external resistor, R , prevents false triggering. Its value is calculated as follows:
T
V(
VT
)
CT
RT
Where:
V
V
R
= V
or 7.1 V, whichever is less
(CT)
T–
T
CC
= 4.55 V (nom)
= value of series resistor required
For V
= 5 V:
CC
5
4.55
RT
1 mA
Therefore,
RT
450
Using a 20%-tolerance resistor, R should be greater than 560 Ω.
T
Adding this series resistor changes the duration of the reset pulse by no more than 10%. R extends the discharge
T
of C , but also skews the V
threshold. These effects tend to cancel one another. The precise percentage change
T
(CT)
can be derived theoretically, but the equation is complicated by this interaction and is dependent upon the duration
of the supply-voltage fault condition.
Both outputs of the TL770xB should be terminated with similar value resistors, even when only one is being used.
This prevents unwanted plateauing in either output waveform during switching, which may be interpreted as an
undefined state or delay system reset.
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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deems necessary to support this warranty. Except where mandated by government requirements, testing of all
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Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated
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TL7702ACD
SUPPLY VOLTAGE SUPERVISORSWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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STMICROELECTR
TL7702ACD1
IC,VOLT DETECTOR,FIXED,+2.53V,BIPOLAR,SOP,8PIN,PLASTICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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TI
TL7702ACD1
IC,VOLT DETECTOR,FIXED,+2.53V,BIPOLAR,SOP,8PIN,PLASTICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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STMICROELECTR
TL7702ACD1013TRA
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, SOP-8Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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STMICROELECTR
TL7702ACD3
IC,VOLT DETECTOR,FIXED,+2.53V,BIPOLAR,SOP,8PIN,PLASTICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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TI
TL7702ACDE4
SUPPLY-VOLTAGE SUPERVISORSWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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TI
TL7702ACDG4
SUPPLY-VOLTAGE SUPERVISORSWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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TI
TL7702ACDP1
IC,VOLT DETECTOR,FIXED,+2.53V,BIPOLAR,SOP,8PIN,PLASTICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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TI
TL7702ACDP3
IC,VOLT DETECTOR,FIXED,+2.53V,BIPOLAR,SOP,8PIN,PLASTICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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TI
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