DATA SHEET
MOS INTEGRATED CIRCUIT
μ
PD43256B
256K-BIT CMOS STATIC RAM
32K-WORD BY 8-BIT
Description
The
μ
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
μ
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
ns (MAX.)
Operating supply Operating ambient
voltage
V
temperature
°C
0 to 70
At operating
mA (MAX.)
45
Supply current
At standby
At data retention
μ
A (MAX.)
50
15
μ
A (MAX.)
Note1
3
2
μ
PD43256B-xxL
μ
PD43256B-xxLL
μ
PD43256B-Axx
μ
PD43256B-Bxx
Note2
70, 85
4.5 to 5.5
85, 100
Note2
, 120
Note2
3.0 to 5.5
2.7 to 5.5
100, 120, 150
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)
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all products and/or types are available in every country. Please check with an NEC Electronics
sales representative for availability and additional information.
Document No. M10770EJEV0DS00 (14th edition)
Date Published June 2006 NS CP (K)
Printed in Japan
1990, 1993, 1994
μ
PD43256B
(2/2)
Part number
Package
Access time
ns (MAX.)
Operating supply Operating ambient
voltage
V
temperature
°C
0 to 70
L version
Remark
μ
PD43256BGU-70L-A
μ
PD43256BGU-85L-A
μ
PD43256BGU-70LL-A
μ
PD43256BGU-85LL-A
μ
PD43256BGU-A85-A
μ
PD43256BGU-A10-A
μ
PD43256BGU-A12-A
μ
PD43256BGU-B10-A
μ
PD43256BGU-B12-A
μ
PD43256BGW-70LL-9JL-A
μ
PD43256BGW-85LL-9JL-A
μ
PD43256BGW-A85-9JL-A
μ
PD43256BGW-A10-9JL-A
μ
PD43256BGW-A12-9JL-A
μ
PD43256BGW-B10-9JL-A
μ
PD43256BGW-B12-9JL-A
μ
PD43256BGW-B15-9JL-A
28-pin PLASTIC SOP
(11.43 mm (450))
70
85
70
85
85
100
120
100
120
4.5 to 5.5
LL version
3.0 to 5.5
A version
2.7 to 5.5
B version
28-pin PLASTIC TSOP (I)
(8x13.4) (Normal bent)
70
85
85
100
120
100
120
150
70
85
85
100
120
100
120
150
4.5 to 5.5
LL version
3.0 to 5.5
A version
2.7 to 5.5
B version
μ
PD43256BGW-70LL-9KL-A 28-pin PLASTIC TSOP (I)
μ
PD43256BGW-85LL-9KL-A (8x13.4) (Reverse bent)
μ
PD43256BGW-A85-9KL-A
μ
PD43256BGW-A10-9KL-A
μ
PD43256BGW-A12-9KL-A
μ
PD43256BGW-B10-9KL-A
μ
PD43256BGW-B12-9KL-A
μ
PD43256BGW-B15-9KL-A
Remark
4.5 to 5.5
LL version
3.0 to 5.5
A version
2.7 to 5.5
B version
Products with -A at the end of the part number are lead-free products.
Data Sheet M10770EJEV0DS
3
μ
PD43256B
Pin Configurations (Marking Side)
/xxx indicates active low signal.
28-pin PLASTIC DIP (15.24 mm (600))
[
μ
PD43256BCZ-xxL ]
[
μ
PD43256BCZ-xxLL ]
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O1
I/O2
I/O3
GND
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
V
CC
/WE
A13
A8
A9
A11
/OE
A10
/CS
I/O8
I/O7
I/O6
I/O5
I/O4
A0 - A14
I/O1 - I/O8
/CS
/WE
/OE
V
CC
GND
: Address inputs
: Data inputs / outputs
: Chip Select
: Write Enable
: Output Enable
: Power supply
: Ground
Remark
Refer to
Package Drawings
for the 1-pin index mark.
4
Data Sheet M10770EJEV0DS
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