DS1312 Datasheet, PDF (10/11 Pages) Dallas Semiconductor – Nonvolatile Controller with Lithium Battery Monitor

NOTES:
1. All voltages referenced to ground.
DS1312
2. Measured with outputs open circuited.
3. I_CCO1 is the maximum average load which the DS1312 can supply to attached memories at V_CCO >
V_CCI -0.2V.
4. I_CCO1 is the maximum average load which the DS1312 can supply to attached memories at V_CCO >
V_CCI -0.3V.
5. All inputs within 0.3V of ground or V_CCI.
6. I_CCO2 is the maximum average load current which the DS1312 can supply to the memories in the
battery backup mode.
7. Measured with a load as shown in Figure 2.
8. Chip Enable Output CEO can only sustain leakage current in the battery backup mode.
9. CEO will be held high for a time equal to t_REC after V_CCI crosses V_CCTP on power-up.
10. BW and RST are open-drain outputs and, as such, cannot source current. External pull-up resistors
should be connected to these pins for proper operation. Both BW and RST can sink 10 mA.
11. t_CE maximum must be met to ensure data integrity on power-down.
12. In battery-backup mode, inputs must never be below ground or above V_CCO.
13. The DS1312 is recognized by Underwriters Laboratory (U.L.®) under file E99151.
DC TEST CONDITIONS
Outputs Open
All voltages are referenced to ground
AC TEST CONDITIONS
Output Load: See below
Input Pulse Levels: 0 - 3.0V
Timing Measurement Reference Levels
Input: 1.5V
Output: 1.5V
Input pulse Rise and Fall Times: 5 ns
OUTPUT LOAD Figure 2
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