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CAT1232LP 数据表(PDF) 3 Page - ON Semiconductor

部件名 CAT1232LP
功能描述  5 V and 3.3 V Supply Monitor, Watchdog Timer, Manual Reset, with Active High & Low Resets
PDF  12 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

CAT1232LP 数据表(HTML) 3 Page - ON Semiconductor

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CAT1232LP, CAT1832
© 2009 SCILLC. All rights reserved.
3
Doc. No. MD-3018 Rev. F
Characteristics subject to change without notice
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, 1.0 V - VCC - 5.5 V and over the operating temperature range of -40ºC to +85ºC.
All voltages are referenced to ground.
Symbol Parameter
Conditions
Min
Typ
Max
Units
VCC
Supply Voltage
1.0
5.5
V
VCC = 5.5 V, CAT1232LP
35
50
ICC1
Supply Current
VCC = 3.6 V, CAT1832
20
35
µA
(5)
2
VIH
ST and PBRST
¯¯¯¯¯¯ Input High
Level
(6)
VCC - 0.4 V
VCC + 0.3 V
V
VCC = 5.5 V, CAT1232LP
-0.3
0.8
VIL
ST and PBRST
¯¯¯¯¯¯ Input Low
Level
VCC = 3.6 V, CAT1832
0.5
V
VCCTP
VCC Trip Point (TOL = GND)
CAT1232LP
4.50
4.62
4.74
V
VCCTP
VCC Trip Point (TOL = VCC)
CAT1232LP
4.25
4.37
4.49
V
VCCTP
VCC Trip Point (TOL = GND)
CAT1832
2.80
2.88
2.97
V
VCCTP
VCC Trip Point (TOL = VCC)
CAT1832
2.47
2.55
2.64
V
tTD
Watchdog Time-Out Period
TD = GND
62.5
150
250
ms
tTD
Watchdog Time-Out Period
TD = VCC
500
1200
2000
ms
tTD
Watchdog Time-Out Period
TD floating
250
600
1000
ms
VOH
Output Voltage
I = -500 µA
(3)
VCC -0.5 V
VCC -0.1 V
V
IOH
Output Current
Output = 2.4 V
(2)
-350
µA
IOL
Output Current
Output = 0.4 V
10
mA
IIL
Input Leakage
(1)
-1.0
1.0
µA
RPU
Internal Pull-Up Resistor
(1)
32
40
55
kΩ
CIN
Input Capacitance
5
pF
COUT
Output Capacitance
7
pF
tPB
PBRST
¯¯¯¯¯¯ Manual Reset
Minimum Low Time
PBRST
¯¯¯¯¯¯ = VIL
20
ms
tRST
Reset Active Time
250
600
1000
ms
tST
ST
¯¯ Pulse Width
(4)
20
ns
tRPD
VCC Fail Detect to RESET or
RESET
¯¯¯¯¯¯
5
8
µs
tF
VCC Slew Rate
20
µs
tPDLY
PBRST
¯¯¯¯¯¯ Stable LOW to RESET
and RESET
¯¯¯¯¯¯ Active
20
ms
tRPU
VCC Detect to RESET or
RESET
¯¯¯¯¯¯ Inactive
tRISE = 5 µs
250
600
1000
ms
tR
VCC Slew Rate
4.25 V to 4.75 V
0
ns
Notes:
(1) PBRST
¯¯¯¯¯¯ is internally pulled HIGH to V
CC through a nominal 40 kΩ resistor (RPU).
(2) RESET
¯¯¯¯¯¯ is an open drain output on the CAT1232LP.
(3) RESET remains within 0.5 V of VCC on power-down until VCC falls below 2 V. RESET remains within 0.5 V of ground on power-down until
VCC falls below 2.0 V.
(4) Must not exceed the minimum watchdog time-out period (tTD). The watchdog circuit cannot be disabled. To avoid a reset, ST
¯¯ must be
strobed.
(5) Measured with VCC ≥ 2.7 V.
(6) Measured with VCC < 2.7 V.



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