HMD4M72D18G Datasheet, PDF (1/16 Pages) Hanbit Electronics Co.,Ltd – 32Mbyte(4Mx72) Fast Page Mode 4K Ref. 5V, DIMM 168 pin

HANBit
HMD4M72D18G
32Mbyte(4Mx72) Fast Page Mode 4K Ref. 5V, DIMM 168 pin
Part No. HMD4M72D18G
GENERAL DESCRIPTION
The HMD4M72D18G is a 4Mx72bits Dynamic RAM high density memory module. The HMD4M72D18G consists of
eighteen CMOS 4Mx4bits DRAMs in SOJ/TSOPІІ 400mil packages mounted on a 168-pin glass-epoxy substrate. A 0.1 or
0.22uF decoupling capacitor is mounted on the printed circuit board for each DRAM. The HMD4M72D18 is a Dual In-line
Memory Module and is intended for mounting into 168 pin edge connector sockets
FEATURES
w Part Identification
HMD4M72D18G --- 4KCycles/64ms Ref, Gold Plate Lead
PERFORMANCE RANGE
SPEED
-5
-6
t_RAC
50ns
60ns
t_CAC
18ns
20ns
t_RC
90ns
110ns
t_HPC
35ns
40ns
w High-density 32MByte design
w New JEDEC standard proposal without buffer
w CAS-before-RAS Refresh capability
w RAS-only and Hidden refresh capability
w Single +5± 0.5V power supply
w Timing
w Fast Page mode operation.
50ns access
-5
w LVTTL compatible inputs and outputs
60ns access
-6
w FR4-PCB design
w Packages
w Access times : 50, 60ns
168-pin DIMM
D
PIN NAMES
Pin Name
Function
A0-A11 Address Input (4k ref)
A0-A12 Address Input (8k ref)
/W0,/W2 Read/Write Enable
/OE0,/OE2 Output Enable
SA0 – SA2 Address in EEPROM
Pin Name
Function
/RAS0, /RAS2 Row Address Strobe
/CAS0 - /CAS7 Column Address Strobe
SCL
Serial Clock
DU
Don't use
CB0 - CB7 Check Bit
Pin Name
Function
Vss
Ground
NC
No Connection
Vcc
Power (+5V)
SDA
Serial Address
/Data I/O
DQ0-DQ63 Data In/Out
URL:www.hbe.co.kr
REV. 1.0 (August.2002)
-1-
HANBit Electronics Co.,Ltd.