IS61NSCS25672 データシートの表示（PDF） - Integrated Silicon Solution

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IS61NSCS25672

ΣRAM 256K x 72, 512K x 36 18Mb Synchronous SRAM

Integrated Silicon Solution 

IS61NSCS25672

IS61NSCS51236

ISSI ®

AC ELECTRICAL CHARACTERISTICS

Symbol

Parameter

tKHKH

Clock Cycle Time

tKHKL

Clock HIGH Time

tKLKH

Clock LOW Time

tKHCX1(2)

Clock High to Echo Clock Low-Z

tKHCH

Clock High to Echo Clock High

tCHCL(2)

Echo Clock High Time

tKLCL

Clock Low to Echo Clock Low

tCLCH(2)

Echo Clock Low Time

tKHCZ(1, 2)

Clock High to Echo Clock High-Z

tKHQX1(1)

Clock High to Output in Low-Z

tKHQV

Clock High to Output Valid

tKHQX

Clock High to Output Invalid

tKHQZ(1)

Clock High to Output in High-Z

tCHQV(2)

Echo Clock High to Output Valid

tCHQX(2)

Output Invalid to Echo Clock High

tAVKH

Address Valid to Clock High

tKHAX

Clock High to Address Don’t Care

tEVKH

Enable Valid to Clock High

tKHEX

Clock High to Enable Don’t Care

tWVKH

Write Valid to Clock High

tKHWX

Clock High to Write Don’t Care

tBVKH

Byte Write Valid to Clock High

tKHBX

Clock High to Byte Write Don’t Care

tDVKH

Data In Valid to Clock High

tKHDX

Clock High to Data In Don’t Care

tadvVKH

ADV Valid to Clock High

tKHadvX

Clock High to ADV Don’t Care

Notes:

1. Measured at 100 mV from steady state. Not 100% tested.

2. Guaranteed by design. Not 100% tested.

3. For any specific temperature and voltage tKHCZ < tKHCX1.

-333

Min Max

3.0 —

1.2 —

1.2 —

0.5 —

0.5 1.5

tKHKL ±200 ps

0.5 1.5

tKLKH ±200 ps

— 1.5

0.5 —

— 1.6

0.5 —

0.5 1.6

— 0.4

— –0.4

0.6 —

0.4 —

0.6 —

0.4 —

0.6 —

0.4 —

0.6 —

0.4 —

0.6 —

0.4 —

0.6 —

0.4 —

-300

Min Max

3.3 —

1.3 —

1.3 —

0.5 —

0.5 1.7

tKHKL ±200 ps

0.5 1.7

tKLKH ±200 ps

— 1.7

0.5 —

— 1.8

0.5 —

0.5 1.8

— 0.4

— –0.4

0.7 —

0.4 —

0.7 —

0.4 —

0.7 —

0.4 —

0.7 —

0.4 —

0.7 —

0.4 —

0.7 —

0.4 —

-250

Min Max

4.0 —

1.5 —

1.5 —

0.5 —

0.5 2.0

tKHKL ±250 ps

0.5 2.0

tKLKH ±250 ps

— 2.0

0.5 —

— 2.1

0.5 —

0.5 2.1

— 0.5

— –0.5

0.8 —

0.5 —

0.8 —

0.5 —

0.8 —

0.5 —

0.8 —

0.5 —

0.8 —

0.5 —

0.8 —

0.5 —

Unit

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

Integrated Silicon Solution, Inc. — 1-800-379-4774

21

ADVANCE INFORMATION Rev. 00A

06/19/01

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