LTC1232(RevA) 查看數據表（PDF） - Linear Technology
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LTC1232 Datasheet PDF : 8 Pages
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LTC1232
TYPICAL PERFOR A CE CHARACTERISTICS
VCC Trip Point vs Temperature
4.63
TOL = GND
4.62
4.61
4.60
4.59
4.58
4.57
–50 –25
0 25 50 75
TEMPERATURE (˚C)
100 125
LTC1232 • TPC01
VCC Trip Point vs Temperature
4.38
TOL = VCC
4.37
4.36
4.35
4.34
4.33
4.32
–50 –25
0 25 50 75
TEMPERATURE (˚C)
100 125
LTC1232 • TPC02
Reset Active Time vs Temperature
696
VCC = 5V
672
648
624
600
576
552
–50 –25
0 25 50 75
TEMPERATURE (˚C)
100 125
LTC1232 • TPC03
Time-Out Period vs Temperature
696
VCC = 5V
TD = NO CONNECTION
672
648
624
600
576
552
–50 –25
0 25 50 75
TEMPERATURE (˚C)
100 125
LTC1232 • TPC04
RST Output Voltage vs Supply Voltage
5
TA = 25°C
EXTERNAL PULL-UP = 10µA
4
3
2
1
0
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
LTC1232 • TPC05
PI FU CTIO S
VCC: 5V Supply Input. The VCC pin should be bypassed
with a 0.1µF capacitor.
GND: Ground Pin.
PB RST: Logic Input to be Directly Connected to a Push-
Button. The PB RST input requires an active low signal
which is debounced and timed for a minimum of 40ms.
When this condition is satisfied, the reset pulse generator
forces the reset outputs to active states. The reset outputs
remain in active states for a minimum of 250ms after
PB RST is released from logic low level.
TOL: Input to Select 5% or 10% Variation on VCC. When
TOL is connected to GND, the reset pulse generator forces
the reset outputs to active states as VCC falls below 4.75V
(4.62V typical). When TOL is connected to VCC, the reset
pulse generator forces the reset outputs to active states as
VCC falls below 4.5V (4.37V typical).
TD: Time-Out Delay. TD is a three-level input to select three
different time-out periods. The time-out period is set by
the TD input to be 150ms with TD connected to GND,
600ms with TD left floating, and 1.2 seconds with TD
connected to VCC.
sn1232 1232fas
5
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