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Winbond - 32K X 8 CMOS STATIC RAM

Numéro de référence W24258S-55LL
Description 32K X 8 CMOS STATIC RAM
Fabricant Winbond 
Logo Winbond 





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W24258S-55LL fiche technique
W24258/LL
GENERAL DESCRIPTION
32K × 8 CMOS STATIC RAM
The W24258/LL is a normal speed, very low power CMOS static RAM organized as 32768 × 8 bits
that operates on a single 5-volt power supply. This device is manufactured using Winbond's high
performance CMOS technology.
FEATURES
Low power consumption:
Active: 350 mW (max.)
Standby: 25 µW (max.)
Access time: 55/70 nS (max.)
Single 5V power supply
Fully static operation
All inputs and outputs directly TTL compatible
Three-state outputs
Battery back-up operation capability
Data retention voltage: 2V (min.)
Packaged in 28-pin 600 mil DIP, 330 mil SOP
and standard type one TSOP (8 mm × 13.4
mm)
PIN CONFIGURATIONS
BLOCK DIAGRAM
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O1
I/O2
I/O3
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28-pin
DIP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDD
WE
A13
A8
A9
A11
OE
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
CLK GEN.
PRECHARGE CKT.
A12
A14
R
A2 O
W
A3 CORE CELL ARRAY
D
A4 E 512 ROWS
C
A5 O 64 X 8 COLUMNS
D
A6 E
R
A7
A13
I/O1 DATA
I/O CKT.
I/O8 CNTRL. COLUMN DECODER
CLK
GEN.
A11 A10 A1 A0 A8 A9
WE
CS
OE
OE
A11
A9
A8
A13
WE
V DD
A14
A12
A7
A6
A5
A4
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28-pin
TSOP
28 A10
27 CS
26 I/O8
25 I/O7
24 I/O6
23 I/O5
22 I/O4
21 V SS
20 I/O3
19 I/O2
18 I/O1
17 A0
16 A1
15 A2
PIN DESCRIPTION
SYMBOL
A0A14
I/O1I/O8
CS
WE
OE
VDD
VSS
DESCRIPTION
Address Inputs
Data Inputs/Outputs
Chip Select Input
Write Enable Input
Output Enable Input
Power Supply
Ground
Publication Release Date: November 1998
- 1 - Revision A5

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