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ICM7249_01 Datasheet, PDF (4/9 Pages) Intersil Corporation – 5 1/2 Digit LCD, Micro-Power Event/Hour Meter | |||
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Timing Waveforms
ICM7249
POWER ON
VDD
RESET
tr
OSC OUT
BP
123456
ON
SEGMENTS
OFF
SEGMENTS
511 512
ONE 1/2 BACKPLANE CYCLE
f0 = 32.768kHz
fBP = 32Hz
fSEG = 32Hz
FIGURE 1. POWER ON/RESET WAVEFORMS
S/S VALID
S/S INVALID
S/S VALID
TIMING ACTIVE DURING INTERVAL
tHP > 12.5ms
TIMING INTERMINATE DURING INTERVAL
tHP
10ms < tHP < 12.5ms
40Hz < f < 50Hz
TIMING ACTIVE DURING INTERVAL
tHP
5µs ⤠tHP ⤠10ms
50Hz ⤠f ⤠120kHz
FIGURE 2. START/STOP INPUT HIGH-PASS FILTERING IN TIMING MODES
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