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1990, 1993, 1994
MOS INTEGRATED CIRCUIT
PD43256B
256K-BIT CMOS STATIC RAM
32K-WORD BY 8-BIT
DATA SHEET
Document No. M10770EJCV0DS00 (12th edition)
Date Published June 2000 NS CP (K)
Printed in Japan
The mark
5
shows major revised points.
Description
The
PD43256B is a high speed, low power, and 262,144 bits (32,768 words by 8 bits) CMOS static RAM.
Battery backup is available. And A and B versions are wide voltage operations.
The
PD43256B is packed in 28-pin plastic DIP, 28-pin plastic SOP and 28-pin plastic TSOP (I) (8 x 13.4 mm).
Features
32,768 words by 8 bits organization
Fast access time: 70, 85, 100, 120, 150 ns (MAX.)
Low voltage operation (A version: V
CC
= 3.0 to 5.5 V, B version: V
CC
= 2.7 to 5.5 V)
Low V
CC
data retention: 2.0 V (MIN.)
/OE input for easy application
Part number
Access time
Operating supply Operating ambient
Supply current
ns (MAX.)
voltage
temperature
At operating
At standby
At data retention
V
C
mA (MAX.)
A (MAX.)
A (MAX.)
Note1
PD43256B-xxL
70, 85
4.5 to 5.5
0 to 70
45
50
3
PD43256B-xxLL
15
2
PD43256B-Axx
85, 100
Note2
, 120
Note2
3.0 to 5.5
PD43256B-Bxx
Note2
100, 120, 150
2.7 to 5.5
Notes 1. T
A
40
C, V
CC
= 3.0 V
2. Access time: 85 ns (MAX.) (V
CC
= 4.5 to 5.5 V)
Version X and P
This Data sheet can be applied to the version X and P. Each version is identified with its lot number. Letter X in the
fifth character position in a lot number signifies version X, letter P, version P.
D43256B
Lot number
JAPAN
3
PD43256B
Data Sheet M10770EJCV0DS00
Pin Configurations (Marking Side)
/xxx indicates active low signal.
28-PIN PLASTIC DIP (15.24 mm (600))
[
PD43256BCZ-xxL ]
[
PD43256BCZ-xxLL ]
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O1
I/O2
I/O3
GND
V
CC
/WE
A13
A8
A9
A11
/OE
A10
/CS
I/O8
I/O7
I/O6
I/O5
I/O4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A0 - A14
: Address inputs
I/O1 - I/O8
: Data inputs / outputs
/CS
: Chip Select
/WE
: Write Enable
/OE
: Output Enable
V
CC
: Power supply
GND
: Ground
Remark Refer to Package Drawings for the 1-pin index mark.
5
PD43256B
Data Sheet M10770EJCV0DS00
28-PIN PLASTIC TSOP (I) (8x13.4) (Normal bent)
[
PD43256BGW-xxLL-9JL ]
[
PD43256BGW-Axx-9JL ]
[
PD43256BGW-Bxx-9JL ]
/OE
A11
A9
A8
A13
/WE
V
CC
A14
A12
A7
A6
A5
A4
A3
A10
/CS
I/O8
I/O7
I/O6
I/O5
I/O4
GND
I/O3
I/O2
I/O1
A0
A1
A2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28-PIN PLASTIC TSOP (I) (8x13.4) (Reverse bent)
[
PD43256BGW-xxLL-9KL ]
[
PD43256BGW-Axx-9KL ]
[
PD43256BGW-Bxx-9KL ]
/OE
A11
A9
A8
A13
/WE
V
CC
A14
A12
A7
A6
A5
A4
A3
A10
/CS
I/O8
I/O7
I/O6
I/O5
I/O4
GND
I/O3
I/O2
I/O1
A0
A1
A2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A0 - A14
: Address inputs
I/O1 - I/O8
: Data inputs / outputs
/CS
: Chip Select
/WE
: Write Enable
/OE
: Output Enable
V
CC
: Power supply
GND
: Ground
Remark Refer to Package Drawings for the 1-pin index mark.
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