參數(shù)資料
型號(hào)： IBM13M32734BCB
廠商： IBM Microeletronics
英文描述： 32M x 72 2-Bank Registered SDRAM Module(32M x 72 2組寄存同步動(dòng)態(tài)RAM模塊)
中文描述： 32M × 72配置2，銀行注冊(cè)內(nèi)存模塊（32M × 72配置2組寄存同步動(dòng)態(tài)內(nèi)存模塊）
文件頁(yè)數(shù)： 13/20頁(yè)
文件大?。?/td> 575K
代理商： IBM13M32734BCB
IBM13M32734BCB
32M x 72 2-Bank Registered SDRAM Module
19L7299.F38444A
8/99
IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
Page 13 of 20
.
Common Parameters
Symbol
Parameter
-75A
Units
Notes
Min.
Max.
t
CS
Command Setup Time
1.65
ns
1
t
CH
Command Hold Time
0.35
ns
1
t
AS
Address and Bank Select Setup Time
1.65
ns
1
t
AH
Address and Bank Select Hold Time
0.35
ns
1
t
RCD
RAS to CAS Delay
20.0
ns
1
t
RC
Bank Cycle Time
67.5
ns
1
t
RAS
Active Command Period
45
100000
ns
1
t
RP
Precharge Time
20.0
ns
1
t
RRD
Bank to Bank Delay Time
15
ns
1
t
CCD
CAS to CAS Delay Time (Same Bank)
1
CLK
1. These parameters account for the number of clock cycles and depend on the operating frequency of the clock as follows: the num-
ber of clock cycles = specified value of timing/clock period (count fractions as a whole number).
Mode Register Set Cycle
Symbol
Parameter
-75A
Units
Notes
Min.
Max.
t
RSC
Mode Register Set Cycle Time
2
—
CLK
1
1. These parameters account for the number of clock cycles and depend on the operating frequency of the clock as follows: the num-
ber of clock cycles = specified value of timing/clock period (count fractions as a whole number).
Refresh Cycle
Symbol
Parameter
-75A
Units
Notes
Min.
Max.
t
REF
Refresh Period
—
64
ms
1, 2
t
REFI
Average Refresh Interval Time
—
15.625
μ
s
t
REFC
Row Refresh Cycle Time
75
—
ns
t
SREX
Self Refresh Exit Time
10
—
ns
3
1. 4096 cycles.
2. Any time that the Refresh Period has been exceeded, a minimum of two Auto (CBR) Refresh commands must be given to “wake
up” the device.
3. Self Refresh exit is asynchronous, requiring 10ns to ensure initiation. Self Refresh exit is complete in 10ns + t
RC
.
相關(guān)PDF資料
PDF描述
IBM13M32734BCC 32M x 72 2 Bank Registered SDRAM Module(32M x 72 2組寄存同步動(dòng)態(tài)RAM模塊)
IBM13M32734BCD 32M x 72 2-Bank Registered/Buffered SDRAM Module(32M x 72 2組寄存/緩沖同步動(dòng)態(tài)RAM模塊)
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IBM13M32734CCA 32M x 72 1 Bank Registered/Buffered SDRAM Module(32M x 72 1組寄存/緩沖同步動(dòng)態(tài)RAM模塊)
IBM13M32734CCB 32M x 72 1-Bank Registered / Buffered SDRAM Module(32M x 72 1組寄存/緩沖同步動(dòng)態(tài)RAM模塊)
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