HM51(S)4170D Series, HM51(S)4270D Series
Pin Arrangement
HM514270DJ/DLJ Series
HM51S4270DJ/DLJ Series
V
CC
I/O0
I/O1
I/O2
I/O3
V
CC
I/O4
I/O5
I/O6
I/O7
NC
LWE
UWE
RAS
NC
A0
A1
A2
A3
V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
V
SS
I/O15
I/O14
I/O13
I/O12
V
SS
I/O11
I/O10
I/O9
I/O8
NC
NC
CAS
OE
A8
A7
A6
A5
A4
V
SS
HM514270DTT/DLTT Series
HM51S4270DTT/DLTT Series
V
CC
I/O0
I/O1
I/O2
I/O3
V
CC
I/O4
I/O5
I/O6
I/O7
1
2
3
4
5
6
7
8
9
10
44
43
42
41
40
39
38
37
36
35
V
SS
I/O15
I/O14
I/O13
I/O12
V
SS
I/O11
I/O10
I/O9
I/O8
(Top view)
NC
LWE
UWE
RAS
NC
A0
A1
A2
A3
V
CC
13
14
15
16
17
18
19
20
21
22
32
31
30
29
28
27
26
25
24
23
NC
NC
CAS
OE
A8
A7
A6
A5
A4
V
SS
(Top view)
Pin Description
Pin name
A0 to A8
Function
Address input
— Refresh address A0 to A8
— Row address
A0 to A8
— Column address A0 to A8
I/O0 to I/O15 Data input/output
RAS
CAS
UWE
/
LWE
OE
V
CC
V
SS
NC
Row address strobe
Column address strobe
Read/write enable
Output enable
Power supply
Ground
No connection
5
HITACHI [ HITACHI SEMICONDUCTOR ]
