Discontinued (7/00 - last order; 9/00 - last ship)
IBM11M8730HB8M
x 72 E12/11, 3.3V, Au.
IBM11M16845CB
Preliminary
Features
• 168 Pin JEDEC Standard, 8 Byte Dual In-line
Memory Module
16M x 72 Chipkill Correct DRAM Module
• Optimized for ECC applications
• System Performance Benefits:
- Buffered inputs (except RAS, Data)
• 16Mx72 Chipkill Correct EDO DIMM
• Performance:
- Reduced noise (32 V /V pins)
SS CC
- Buffered PDs
-5R
-6R
• Extended Data Out (EDO) Mode, Read-Modify-
Write Cycles
• Refresh Modes: RAS-Only, CBR and Hidden
Refresh
• 4096 refresh cycles distributed across 64ms
(CBR)
• 13/11 addressing (Row/Column)
• Card size: 5.25" x 1.9" x 0.157"
• DRAMS in TSOP Package
50ns
19ns
34ns
89ns
20ns
60ns
22ns
37ns
104ns
25ns
tRAC
tCAC
tAA
RAS Access Time
CAS Access Time
Access Time From Address
Cycle Time
tRC
EDO Mode Cycle Time
tHPC
• All inputs and outputs are LVTTL compatible
• Single 3.3 ± 0.15V Power Supply
• Au contacts
Description
IBM11M16845CB is an industry standard 168-pin
8-byte Dual In-line Memory Module (DIMM) which is
organized as a 16Mx72 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.
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.
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.
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).
Card Outline
(Front)
(Back)
1
85
10 11
94 95
84
168
40 41
124 125
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
01L5991.00
Rev 12/97
Page 1 of 29
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