IBM11S2325HM-70T 参数 Datasheet PDF下载

IBM11S4325HP IBM11S2325HP

IBM11S4325HM IBM11S2325HM

2M/4M x 32 SO DIMM Module

Write Cycle

-60

Symbol

t

WCS

t

WCH

t

WP

t

RWL

t

CWL

t

DS

t

DH

Parameter

Min

Write Command Set Up Time

Write Command Hold Time

Write Command Pulse Width

Write Command to RAS Lead Time

Write Command to CAS Lead Time

D

IN

Setup Time

D

IN

Hold Time

0

10

10

10

10

0

10

Max

—

—

—

—

—

—

—

Min

0

10

10

10

10

0

10

Max

—

—

—

—

—

—

—

Min

0

12

12

12

12

0

12

Max

—

—

—

—

—

—

—

ns

ns

ns

ns

ns

ns

ns

1

-6R

-70

Units

Notes

1. t

WCS

is not a restrictive operating parameter. it is included in the data sheet as an electrical characteristic only. If

t

WCS

≥

t

WCS

(min), the cycle is an early write cycle and the data pin will remain open circuit (high impedance) through the entire

cycle. If the above set of conditions is not satisfied, the condition of the data out (at access time) is indeterminate.

Read Cycle

Symbol

t

RAC

t

CAC

t

AA

t

RCS

t

RCH

t

RRH

t

RAL

t

CLZ

t

CDD

t

OFF

Parameter

Access Time from RAS

Access Time from CAS

Access Time from Address

Read Command Setup Time

Read Command Hold Time to CAS

Read Command Hold Time to RAS

Column Address to RAS Lead Time

CAS to Output in Low-Z

CAS to D

IN

Delay Time

Output Buffer Turn-off Delay

-60

Min

—

—

—

0

0

0

30

0

15

—

Max

60

15

30

—

—

—

—

—

—

15

Min

—

—

—

0

0

0

30

0

15

—

-6R

Max

60

17

30

—

—

—

—

—

—

15

Min

—

—

—

0

0

0

35

0

15

—

-70

Max

70

20

35

—

—

—

—

—

—

15

Units

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

5, 6

3

4

4

Notes

1, 2, 3

1, 3

2, 3

1. Operation within the t

RCD

(max.) limit ensures that t

RAC

(max.) can be met. t

RCD

(max.) is specified as a reference point only. If t

RCD

is greater than the specified t

RCD

(max.) limit, then access time is controlled by t

CAC

.

2. Operation within the t

RAD

(max.) limit ensures that t

RAC

(max.) can be met. t

RAD

(max.) is specified as a reference point only. If t

RAD

is greater than the specified t

RAD

(max.) limit, then access time is controlled by t

AA

.

3. Measured with the specified current load and 100pF at V

OL

= 0.8V and V

OH

= 2.0V.

4. Either t

RCH

or t

RRH

must be satisfied for a read cycle.

5. t

OFF

(max) defines the time at which the output achieves the open circuit condition and is not referenced to output voltage levels.

6. t

OFF

is referenced from the rising edge of RAS or CAS, which ever is last.

©IBM Corporation. All rights reserved.

Use is further subject to the provisions at the end of this document.

75H1718

SA14-4471-00

Revised 4/96

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