6

AC Test Conditions

Parameter

Test Conditions

Input pulse levels

0V to 3.0V

Input rise and fall times

5ns

Input and output timing reference levels

1.5V (unless otherwise specified)

FG220102.eps

5V

960

100pF

CECON

510

Figure 3. Output Load

Symbol

Parameter

Minimum

Typical

Maximum

Unit

Notes

300

-

-

µs

10

-

-

µs

0

-

-

µs

chip-enable propagation delay

-

7

10

ns

A,B set up to CE

0-

-

ns

chip-enable recovery

40

80

120

ms

Time during which SRAM is

Write-protect time

40

100

150

µs

write-protected.

Note:

Caution:

Negative undershoots below the absolute maximum rating of -0.3V in battery-backup mode

may affect data integrity.

Dec. 1992 B

bq2204A