Rainbow-electronics DS1558Y Manual de usuario descargar pdf (Pagina 18)

DS1558

18 of 18

AC TEST CONDITIONS

Output Load: 25pF

Input Pulse Levels: 0V to +3V

Timing Measurement Reference Levels:

Input: +1.5V

Output: +1.5V

Input Pulse Rise and Fall Times: 5ns

NOTES:

1) Voltage referenced to ground.

2) Typical values are at +25°C and nominal supplies.

3) Outputs are open.

4) Battery switchover occurs at the lower of either the battery voltage or V

5) The IRQ /FT and RST outputs are open drain.

6) Using the recommended crystal on X1 and X2.

7) V

CCO

, CER , and OER pins open.

8) t

AH1

, t

DH1

are measured from WE going high.

9) t

AH2

, t

DH2

are measured from CE going high.

10) Typical measured with V

BAT

at 3.0V. Typical with I

CCO

= 100µA and V

BAT

= 3.0V is V

BAT

- 0.322.

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Rainbow-electronics DS1558Y Manual de usuario Pagina 18