DS1213B

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TIMING DIAGRAM: POWER-UP

WARNINGS:

Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery

backup mode.

Water washing for flux removal will discharge internal lithium source because exposed voltage pins

are present.

NOTES:

1. All voltages are referenced to ground.

2. Measured with a load as shown in Figure 1.

3. Pin locations are designated “U” (for upper) when a parameter definition refers to the socket

receptacle and “L” (for lower) when a parameter definition refers to the socket pin.

4. No memory inserted in the socket.

mode and meet data retention expectations of more than 10 years at 25°C.

9. Input pulse rise and fall times equal 10 ns.