Battery warning timing, C to +70, C; v – Rainbow Electronics DS1254 User Manual
Page 13: 0v ± 10%), Ac test conditions
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DS1254
13 of 17
Figure 10. BATTERY WARNING DETECTION (Note 3)
BATTERY WARNING TIMING
(0
°
C to +70
°
C; V
CC
= 5.0V
±
10%)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Battery Test Cycle
t
BTC
24
hr
Battery Test Pulse Width
t
BTPW
1
Sec
Battery Test to
BW
Active
t
BW
1
Sec
V
CC
Valid to
BW
Valid
t
BPU
1
Sec
3
AC TEST CONDITIONS
Output Load:
100pF + 1 TTL Gate
Input Pulse Levels:
0.0V to 3.0V
Timing Measurement Reference Levels:
Input: 1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5ns
BATTERY TEST
ACTIVE
BW
V
CC
V
BAT
t
BPU
2.6V
t
BTC
t
BTPW
t
BW
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