I1B0M/1101,D51.04V7,5SBn1/PMb,xA3u2M10M/1D0S,457.0DVS,US-n0/2P1b0,4A4u6M22M.DIBSM471D1ES1U4-7052B10424M62x23.2I1B0M/1101,E52.04V75, BS2nM/Pbx,3A2u1M0/M10D,S54.07VD,SSUn-/0P2b1,0A4u4M62M2D. S47DSU-021044622. IBM11D2475B1M x 32
IBM11D1475B IBM11D2475B
IBM11E1475B IBM11E2475B
1M/2M x 32 Desktop ECC-on-SIMM
Features
• 72-Pin JEDEC Standard Single-In-Line
Memory Module
• Performance:
• High Performance CMOS process
• Single 5V, ± 0.25V Power Supply
• All inputs & outputs are fully TTL & CMOS
compatible
• Extended Data Out (EDO) access cycle
• Refresh Modes: RAS-Only, CBR and Hidden
Refresh
• 1024 refresh cycles distributed across 16ms
• 10/10 Addressing (Row/Column)
• Optimized for use in byte-write non-parity appli-
cations
• Sn/Pb tab and gold tab versions
• DRAMS in SOJ package.
-6R
tRAC
tCAC
tAA
RAS Access Time
CAS Access Time
60ns
18ns
Access Time From Address 30ns
tRC
Cycle Time
104ns
25ns
tHPC
EDO Mode Cycle Time
• Provides ECC and retrofits to standard x32
socket
Description
The IBM11D1475B/IBM11D2475B are 4MB/8MB
industry standard 72-pin 4-byte single in-line mem-
ory modules (SIMMs) that have a fully functional,
retrofittable and plug-compatible on-board error-cor-
recting code (ECC). The ECC function is completely
self-contained and transparent to the system. The
module is manufactured using EDO DRAMs. The
use of EDO DRAMs allows for a reduction in Page
Mode Cycle Time from 40ns (Fast Page) to 25ns
(EDO, 6Rns sort). The modules are organized as
2Mx32 high speed memory arrays, configured as
two 1Mx32 banks -each independently selectable
via unique RAS inputs. The 8MB assembly is manu-
factured with 24 1Mx4 devices, each in a 300mil
SOJ package, and is compatible with the JEDEC
72-Pin SIMM standard.
The IBM11D1475B is a 4MB version, manufactured
with 12 1Mx4 devices each in a 300mil SOJ pack-
age.
The ECC-on-SIMM modules correct single-bit errors
that may occur in any byte of SIMM data with no
performance loss.
Card Outline
1M x 32
36 37
72
1
2M x 32
36 37
72
1
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
75H3507
SA14-4343-00
Released 6/96
Page 1 of 22
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