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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HM1232 데이터시트(PDF) 4 Page - Shenzhen Huazhimei Semiconductor Co., Ltd |
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HM1232 데이터시트(HTML) 4 Page - Shenzhen Huazhimei Semiconductor Co., Ltd |
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4 / 10 page  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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