DS1742-70 데이터 시트보기 (PDF) - Dallas Semiconductor -> Maxim Integrated
부품명
상세내역
제조사
DS1742-70 Datasheet PDF : 12 Pages
| |||
AC TEST CONDITIONS
Output Load:
100 pF + 1TTL Gate
Input Pulse Levels:
0.0 to 3.0 Volts
Timing Measurement Reference Levels:
Input: 1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5 ns
DS1742
NOTES:
1. Voltage referenced to ground.
2. Typical values are at 25°C and nominal supplies.
3. Outputs are open.
4. Battery switch-over occurs at the lower of either the battery voltage or VPF.
5. Data retention time is at 25°C.
6. Each DS1742 has a built-in switch that disconnects the lithium source until VCC is first applied by the
user. The expected tDR is defined as a cumulative time in the absence of VCC starting from the time
power is first applied by the user.
7. Real Time Clock Modules can be successfully processed through conventional wave-soldering
techniques as long as temperature exposure to the lithium energy source contained within does not
exceed +85°C. Post-solder cleaning with water washing techniques is acceptable, provided that
ultrasonic vibration is not used to prevent damage to the crystal.
11 of 12
Share Link: 