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HM1232 Fiches technique(PDF) 4 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

No de pièce HM1232
Description  HM1232 POWER SUPPLY CONTROL CHIP WITH BUILT-IN WATCHDOG TIMER
PDF  10 Pages
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Fabricant  HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]
Site Internet  http://www.hmsemi.com/
Logo HMSEMI - Shenzhen Huazhimei Semiconductor Co., Ltd

HM1232 Fiches technique(HTML) 4 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

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4
Table 3 (cont)
Symbol
Parameter
Test conditions
Typical
Units
min
max
VCCTP1
VCC trip point
TOL = GND
4.5
4.74
V
VCCTP2
VCC trip point
TOL = VCC
4.25
4.49
V
Table 4 – AC electrical characteristics (
amb = from - 10 to + 70 ° )
Symbol
Parameter
Test conditions
Typical
Units
min
max
tTD1
Watchdog timer overflow
time
VCC=5.0 V±10%
tST≥20 ns
TD = GND
62.5
250
ms
tTD2
TD disconnected
250
1000
ms
tTD3
TD = VCC
500
2000
ms
tPDLY
PBRST stable low to RST
and RST
VCC=5.0 V±10%
tPB≥20 ms
-
20
ms
tRST
Reset active time
VCC=5.0 V±10%
tPB≥20 ms
250
1000
ms
tRPD
Vcc fail detect to RST and
RST
VCC=from 5.0 to
4.0 V
tF≥10 µs
-
175
µs
tRPU
Vcc detect to RST and RST
transition
VCC= from 5.0 to
4.0 V
tR≥1 µs
250
1000
ms
HM1232



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