The HB52E649E12 belongs to 8-byte DIMM (Dual In-line Memory Module) family, and has been developed
as an optimized main memory solution for 8-byte processor applications. The HB52E649E12 is a 64M × 72
× 1-bank Synchronous Dynamic RAM Registered Module, mounted 18 pieces of 256-Mbit SDRAM
(HM5225405BTT) sealed in TSOP package, 1 piece of PLL clock driver, 2 pieces of register driver and 1
piece of serial EEPROM (2-kbit) for Presence Detect (PD). An outline of the HB52E649E12 is 168-pin
socket type package (dual lead out). Therefore, the HB52E649E12 makes high density mounting possible
without surface mount technology. The HB52E649E12 provides common data inputs and outputs.
Decoupling capacitors are mounted beside each TSOP on the module board.
Features
• Fully compatible with : JEDEC standard outline 8-byte DIMM
: Intel PCB Reference design (Rev.1.2)
• 168-pin socket type package (dual lead out)
Outline: 133.37 mm (Length) × 43.18 mm (Height) × 4.00 mm (Thickness)
Lead pitch: 1.27 mm
• 3.3 V power supply
• Clock frequency: 100 MHz (max)
• LVTTL interface
• Data bus width: × 72 ECC
• Single pulsed RAS
• 4 Banks can operates simultaneously and independently
• Burst read/write operation and burst read/single write operation capability
• Programmable burst length: 1/2/4/8
• 2 variations of burst sequence
Sequential
Elpida Memory, Inc. is a joint venture DRAM company of NEC Corporation and Hitachi, Ltd.
HB52E649E12-A6B/B6B
Interleave
• Programmable CE latency: 3/4 (HB52E649E12-A6B)
: 4 (HB52E649E12-B6B)
• Byte control by DQMB
• Refresh cycles: 8192 refresh cycles/64 ms
• 2 variations of refresh
Auto refresh
Self refresh
Ordering Information
Type No.FrequencyCE latencyPackageContact pad
HB52E649E12-A6B100 MHz3/4168-pin dual lead out socket type Gold
HB52E649E12-B6B100 MHz4
Pin Arrangement
1 pin 10 pin11 pin40 pin 41 pin84 pin
85 pin 94 pin 95 pin 124 pin 125 pin168 pin
Data Sheet E0020H20
2
HB52E649E12-A6B/B6B
Pin No.Pin namePin No.Pin namePin No.Pin namePin No.Pin name
DQMB0 to DQMB7Byte data mask
CK0 to CK3Clock input
CKE0Clock enable input
WPWrite protect for serial PD
1
REGE*
SDAData input/output for serial PD
SCLClock input for serial PD
SA0 to SA2Serial address input
V
CC
V
SS
NCNo connection
Note:1. REGE ≥ VIH: Register mode.
REGE ≤ V
: Buffer mode.
IL
Register/Buffer enable
Primary positive power supply
Ground
120A7162V
CC
166SA1
126A12168V
Row addressA0 to A12
Column addressA0 to A9, A11
SS
CC
Data Sheet E0020H20
4
HB52E649E12-A6B/B6B
Serial PD Matrix*
Byte No. Function describedBit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value Comments
0Number of bytes used by
module manufacturer
1Total SPD memory size0000100008256 byte
2Memory type0000010004SDRAM
3Number of row addresses bits000011010D13
4Number of column addresses
bits
5Number of banks00000001011
6Module data width010010004872 bit
7Module data width (continued)00000000000 (+)
8Module interface signal levels0000000101LVTTL
9SDRAM cycle time