HM5117400B Series

10

Fast Page Mode Read-Modify-Write Cycle

HM5117400B

-6

-7

-8

Parameter

Symbol Min

Max

Min

Max

Min

Max

Unit

Notes

Fast page mode read-modify-write

cycle time

t

PRWC

85

—

96

—

105

—

ns

delay time from

precharget

CPW

60

—

68

—

75

—

ns

14

Test Mode Cycle

*19

HM5117400B

-6

-7

-8

Parameter

Symbol Min

Max

Min

Max

Min

Max

Unit

Notes

Test mode

setup timet

WTS

0

—

0

—

0

—

ns

Test mode

hold timet

WTH

10

—

10

—

10

—

ns

Refresh

Parameter

Symbol

Max

Unit

Note

Refresh periodt

REF

32

ms

2048 cycles

Refresh period (L-version)t

REF

128

ms

2048 cycles

Notes: 1. AC measurements assume t

2. An initial pause of 200 s is required after power up followed by a minimum of eight initialization

cycles (any combination of cycles containing

-only refresh or

-before-

refresh). If the

internal refresh counter is used, a minimum of eight

-before-

refresh cycles are required.

3. Operation with the t

reference point only; if t

controlled exclusively by t

4. Operation with the t

reference point only; if t

controlled exclusively by t

5. Either t

6. Either t

7.V

times are measured between V

8. Assumes that t

RCD

t

t

If t

recommended value shown in this table, t

9. Measured with a load circuit equivalent to 2 TTL loads and 100 pF.