參數(shù)資料
型號(hào)： IBM11N8845HB
廠商： IBM Microeletronics
英文描述： 8M x 72 Chip-Kill Protect ECC-on-DIMM Module(8M x 72 帶糾錯(cuò)代碼保護(hù)的小外形雙列直插動(dòng)態(tài)RAM模塊)
中文描述： 8米× 72片，殺死保護(hù)ECC的上內(nèi)存模塊（8米× 72帶糾錯(cuò)代碼保護(hù)的小外形雙列直插動(dòng)態(tài)內(nèi)存模塊）
文件頁(yè)數(shù)： 1/29頁(yè)
文件大?。?/td> 497K
代理商： IBM11N8845HB
IBM11N8845HB
Preliminary
8M x 72 Chip-Kill Protect ECC-on-DIMM Module
75H5486
GA14-4641-00
Revised 11/96
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, Unbuffered 8 Byte Dual
In-line Memory Module
8Mx72 Extended Data Out Page Mode DIMM
S
Performance:
All inputs and outputs are LVTTL (3.3V) compatible
Single 3.3V
±
0.15V Power Supply
Optimized for ECC applications
Provides Chip-Kill (ECC) protection transpar
ently to
an existing Single Error Correction (SEC) system
System Performance Benefits:
-Non buffered for increased performance
-Reduced noise (35 VSS/VCC pins)
-Serial 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)
12/11 addressing (Row/Column)
Card size: 5.25" x 1.2" x 0.354"
DRAMS in TSOP Package
Au contacts
Description
The IBM11N8845HB is an industry standard 168-pin
8-byte Dual In-line Memory Module (DIMM) which is orga-
nized as an 8Mx72 high speed memory array supporting
EDO applications. The DIMM uses 9 8Mx8 EDO DRAMs
in TSOP packages along with an ASIC and check bit
DRAMs to provide an SEC ECC system with transparent
chip kill protection.
The DIMMs use serial presence detects implemented via
a serial EEPROM using the two pin I
2
C protocol. This
communication protocol uses Clock (SCL) and Data I/O
(SDA) lines to synchronously clock data between the
master (system logic) and the slave EEPROM device
(DIMM). The EEPROM device address pins (SA0-2) are
brought out to the DIMM tabs to allow 8 unique
DIMM/EEPROM addresses. The first 128 bytes are uti-
lized by the DIMM manufacturer and the second 128
bytes of serial PD data are available to the customer.
All IBM 168-pin DIMMs provide a high performance, flexi-
ble 8-byte interface in a 5.25” long space-saving footprint.
Related products include the buffered DIMMs (x64, x72
parity and x72 ECC Optmized) for applications which can
benefit from the on-card buffers.
-6R
t
RAC
RAS Access Time
60ns
t
CAC
CAS Access Time
18ns
t
AA
Access Time From Address
30ns
t
RC
Cycle Time
104ns
t
HPC
EDO Mode Cycle Time
25ns
Card Outline
1
85
10
94
11
95
40
124
41
125
84
168
(Front)
(Back)
IBM11M4730C4M x 72 E12/10, 5.0V, Au.
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