HMD1M32M2G Datasheet, PDF (1/8 Pages) Hanbit Electronics Co.,Ltd – 4Mbyte(1Mx32) Fast Page Mode, 1K Refresh, 72Pin SIMM, 5V Design

HANBit
HMD1M32M2G
4Mbyte(1Mx32) Fast Page Mode, 1K Refresh, 72Pin SIMM, 5V Design
Part No. HMD1M32M2G
DESCRIPTION
The HMD1M32M2G is an 1M x 32 bits Dynamic RAM MODULE which is assembled 2 pieces of 1M x 16bit DRAMs in 42 pin
SOJ package on single sides the printed circuit board with decoupling capacitors. The HMD1M32M2G is optimized for
application to the systems, which are required high density and large capacity such as main memory of the computers and an
image memory systems, and to the others, which are, requested compact size.
The HMD1M32M2G provides common data and outputs.
PIN ASSIGNMENT
Features
PIN SYMBOL PIN SYMBOL PIN SYMBOL
w 72 pins Single In-Line Package
w Fast Page Mode Capability
w Single +5V± 0.5V power supply
w Fast Access Time & Cycle Time
tRAC tCAC tRC tPC
HMD1M32M2G-6 60 15 110 40
HMD1M32M2G-7 70 18 130 45
w Low Power
Active: 1,870/1,650/1,430 mW(MAX)
Standby: 11mW(CMOS level : MAX)
w /RAS Only Refresh, /CAS before /RAS Refresh,
Hidden Refresh Capability
w All inputs and outputs TTL Compatible
w 1,024 Refresh Cycles/16ms
PRESENCE DETECT PINS (Optional)
PIN
60NS
70NS
PD1
Vss
Vss
PD2
Vss
Vss
PD3
NC
Vss
PD4
NC
NC
1
Vss
25
DQ22
49
DQ8
2
DQ0
26
DQ7
50
DQ24
3
DQ16 27
DQ23
51
DQ9
4
DQ1
28
A7
52
DQ25
5
DQ17 29
NC
53
DQ10
6
DQ2
30
Vcc
54
DQ26
7
DQ18 31
A8
55
DQ11
8
DQ3
32
A9
56
DQ27
9
DQ19 33
NC
57
DQ12
10
Vcc
34 /RAS2 58
DQ28
11
NC
35
NC
59
Vcc
12
A0
36
NC
60
DQ29
13
A1
37
NC
61
DQ13
14
A2
38
NC
62
DQ30
15
A3
39
Vss
63
DQ14
16
A4
40
/CAS0
64
DQ31
17
A5
41
/CAS2
65
DQ15
18
A6
42 /CAS3 66
NC
19
NC
43 /CAS1 67
PD1
20
DQ4
44
/RAS0
68
PD2
21 DQ20 45
NC
69
PD3
22
DQ5
46
NC
70
PD4
23 DQ21 47
/WE
71
NC
24
DQ6
48
NC
72
Vss
PIN DESCRIPTION
PIN
A0 – A9
DQ0 – DQ31
FUNCTION
Address Inputs
Data Input/Output
PIN
PD1 – PD4
Vcc
FUNCTION
Presence Detect
Power (+5V)
/RAS0, /RAS2
Row Address Strobe
Vss
Ground
/CAS0 - /CAS3
Column Address Strobe
NC
No Connection
/WE
Read/Write Enable
-
-
URL:www.hbe.co.kr
REV.1.0 (August.2002)
1
HANBiT Electronics Co., Ltd