Rainbow Electronics DS1558Y - Manual (Page 18)

DS1558
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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
PF
.
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.