L7C109 datasheet(5/15 Pages) LODEV

5 / 15 page

LOGIC Devices Incorporated

www.logicdevices.com

Aug 11, 2010 LDS-L7C108/9-F

1M Static RAMs

128K x 8 Static RAM

L7C108

PRELIMINARY INFORMATION

L7C109

SWITCHING CHARACTERISTICS Over Operating Range

READ CYCLE Notes 5, 11, 12, 22, 23, 24 (ns)

L7C108/109

Symbol

Parameter

15/15-L 20/20-L 25/25-L 35/35-L 45/45-L

tPD

tCDR

Operation Recovery Time Notes 10, 19

Chip Enable High to Data Retention Note 10

DATA RETENTION MODE

VCC

tCDR

4.5 V

≥ 2 V

VIH

tPD

VIH

DATA RETENTION Notes 9, 10

WRITE CYCLE Notes 5, 11, 12, 22, 23, 24 (ns)

L7C108/109

Symbol Parameter

Write Cycle Time

Chip Enable Low to End of Write Cycle

Address Valid to Beginning of Write Cycle

Address Setup to End of Write Cycle

Address Hold After End Of Write

Write Enable Pulse Width Low

Data Setup to End of Write Cycle

Data Hold to End of Write

Write Enable High to Output Low Z Notes 20, 21

Write Enable Low to Output High Z Notes 20, 21

15/15-L 20/20-L 25/25-L 35/35-L 45/45-L

tAVAV

tELWH

tAVWL

tAVWH

tWHAX

tWLWH

tDVWH

tWHDX

tWH X

tWL Z

Min

Max

Min

Max

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