Rainbow-electronics DS1254 Manuel d'utilisateur télécharger pdf (Page 13)

DS1254

13 of 17

Figure 10. BATTERY WARNING DETECTION (Note 3)

BATTERY WARNING TIMING (0

C to +70

C; V

= 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

1 Sec

Valid to BW Valid

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 TES

ACTIVE

BAT

BPU

2.6V

BTC

BTPW

1 2 ... 8 9 10 11 12 13 14 15 16 17

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Rainbow-electronics DS1254 Manuel d'utilisateur Page 13