HM514400BS-7 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HM514400BS-7

1,048,576-word × 4-bit Dynamic Random Access Memory

Hitachi -> Renesas Electronics 

HM514400B/BL, HM514400C/CL Series

Fast Page Mode Read-Modify-Write Cycle

Parameter

Fast page mode read-modify-write

cycle time

Fast page mode read-modify-write

cycle CAS precharge to WE delay

time

HM514400B/BL, HM514400C/CL

-6

-7

-8

Symbol Min Max Min Max Min Max Unit Notes

tPCM

80 — 95 — 100 — ns

tCPW

55 — 65 — 70 — ns 10

Test Mode Cycle

Parameter

Test mode WE setup time

Test mode WE hold time

HM514400B/BL, HM514400C/CL

-6

-7

-8

Symbol Min Max Min Max Min Max Unit Notes

tWS

0

—0

—0

— ns

tWH

10 — 10 — 10 — ns

Counter Test Cycle

Parameter

CAS precharge time in counter test

cycle

HM514400B/BL, HM514400C/CL

-6

-7

-8

Symbol Min Max Min Max Min Max Unit Notes

tCPT

40 — 40 — 40 — ns

12

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