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參數(shù)資料
| 型號： | IBM11M8845HB |
| 廠商： | IBM Microeletronics |
| 英文描述： | 8M x 72 Chipkill Correct DRAM Module(8M x 72 工業(yè)標(biāo)準(zhǔn)的168腳8位動態(tài)RAM模塊（帶信號糾錯系統(tǒng)）) |
| 中文描述： | 8米× 72 Chipkill正確的內(nèi)存（8米× 72工業(yè)標(biāo)準(zhǔn)的168腳8位動態(tài)內(nèi)存模塊（帶信號糾錯系統(tǒng)）） |
| 文件頁數(shù)： | 1/29頁 |
| 文件大?。?/td> | 512K |
| 代理商： | IBM11M8845HB |
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IBM11M8845HB
8M x 72 Chipkill Correct DRAM Module
01L5840.00
Rev 12/97
IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
Page 1 of 29
Features
168 Pin JEDEC Standard, 8 Byte Dual In-line
Memory Module
8Mx72 Chipkill Correct EDO DIMM
Performance:
All inputs and outputs are LVTTL compatible
Single 3.3V
±
0.15V Power Supply
Au contacts
Optimized for ECC applications
System Performance Benefits:
-Buffered inputs (except RAS, Data)
-Reduced noise (32 V
SS
/V
CC
pins)
-Buffered PDs
Extended Data Out (EDO) Mode, Read-Modify-
Write Cycles
Refresh Modes: RAS-Only, CBR and Hidden
Refresh
4096 refresh cycles distributed across 64ms
12/11 addressing (Row/Column)
Card size: 5.25" x 1.2" x 0.157"
DRAMS in TSOP Package
Description
IBM11M8845HB is an industry standard 168-pin
8-byte Dual In-line Memory Module (DIMM) which is
organized as an 8Mx72 high speed memory array,
designed with EDO DRAMs for ECC applications.
The DIMM uses additional checkbit DRAMs and an
ASIC to provide chipkill correction when deployed in
existing single-error-correct ECC systems.
Improved system performance is provided by the
on-DIMM buffering of selected input signals. The
specified timings include all buffer, net and skew
delays, which simplifies the memory subsystem
design analysis. The data and
RAS
signals are not
buffered, which preserves the DRAM access specifi-
cation of 50ns or 60ns.
Presence Detect (PD) and Identification Detect (ID)
bits provide information about the DIMM density,
addressing, performance and features. PD bits can
be dotted at the system level and activated for each
DIMM position using the PD enable (PDE) signal. ID
bits also allow detection of card features, and may
be dot-or’d at the system level to provide information
for the entire DIMM bank.
All IBM 168-pin DIMMs provide a high performance,
flexible 8-byte interface in a 5.25" long space-saving
footprint. Related products are the x64 and x72 par-
ity (5V) DIMMs and ECC DIMMs (5V and 3.3V).
-5R
-6R
t
RAC
t
CAC
t
AA
t
RC
t
HPC
RAS Access Time
50ns
60ns
22ns
CAS Access Time
19ns
Access Time From Address
34ns
37ns
Cycle Time
EDO Mode Cycle Time
89ns
104ns
20ns
25ns
Card Outline
1
85
10
94
11
95
40
124
41
125
84
168
(Front)
(Back)
IBM11M8730HB8M x 72 E12/11, 3.3V, Au.
Discontinued (7/00 - last order; 9/00 - last ship)
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