W24257S-70LL Winbond Electronics, W24257S-70LL Datasheet

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W24257S-70LL

Manufacturer Part Number
W24257S-70LL
Description
Manufacturer
Winbond Electronics
Datasheet

Specifications of W24257S-70LL

Density
256Kb
Access Time (max)
70ns
Sync/async
Asynchronous
Architecture
Not Required
Clock Freq (max)
Not RequiredMHz
Operating Supply Voltage (typ)
5V
Address Bus
15b
Package Type
SOP
Operating Temp Range
0C to 70C
Number Of Ports
1
Supply Current
70mA
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
28
Word Size
8b
Number Of Words
32K
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
W24257S-70LL
Manufacturer:
WINBOND/华邦
Quantity:
20 000
GENERAL DESCRIPTION
The W24257 is a slow speed, low power CMOS static RAM organized as 32768
on a single 5-volt power supply. This device is manufactured using Winbond's high performance
CMOS technology.
FEATURES
PIN CONFIGURATIONS
Low power consumption:
Access time: 70 nS (max.)
Single 5V power supply
Fully static operation
Active: 325 mW (max.)
Standby: 75 W (max.) (LL-version)
# W E
# O E
A13
V
A14
A12
A11
I/O2
A4
A3
I/O1
I/O3
A7
A6
A5
A14
A12
V
A8
A9
D D
A7
A5
A0
A6
A4
A3
A2
A1
SS
150 W (max.) (L-version)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
6
7
8
5
9
10
12
11
13
14
28-pin
28-pin
TSOP
SOP
28
26
25
24
22
21
20
19
18
17
16
15
27
23
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
A9
I/O8
I/O6
I/O5
I/O4
# W E
A13
A8
A11
#OE
A10
#CS
I/O7
DD
#CS
A10
I/O 8
I/O 7
I/O 6
I/O 5
I/O 4
V
I/O 3
I/O 2
I/O 1
A0
A1
A2
SS
32K
- 1 -
BLOCK DIAGRAM
PIN DESCRIPTION
All inputs and outputs directly TTL compatible
Three-state outputs
Battery back-up operation capability
Data retention voltage: 2V (min.)
Packaged in 28-pin 330 mil SOP,
standard type one TSOP (8 mm x 13.4 mm )
SYMBOL
I/O1 I/O8
A0 A14
#CS
# O E
# W E
A14
V
V
A0
#WE
#OE
#CS
D D
V
SS
V
.
.
8 CMOS STATIC RAM
DD
SS
Publication Release Date: February 2001
D E C O D E R
C O N T R O L
Address Inputs
Data Inputs/Outputs
Chip Select Input
Write Enable Input
Output Enable Input
Power Supply
Ground
DESCRIPTION
DATA I/O
A R R A Y
8 bits that operates
C O R E
W24257
Revision A16
I/O1
I/O8
.
.

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W24257S-70LL Summary of contents

Page 1

GENERAL DESCRIPTION The W24257 is a slow speed, low power CMOS static RAM organized as 32768 on a single 5-volt power supply. This device is manufactured using Winbond's high performance CMOS technology. FEATURES Low power consumption: Active: 325 mW (max.) ...

Page 2

TRUTH TABLE #CS #OE # Not Selected Output Disable Read Write DC CHARACTERISTICS Absolute Maximum Ratings PARAMETER Supply Voltage to V Potential SS Input/Output to V Potential SS ...

Page 3

CAPACITANCE ( MHz PARAMETER Input Capacitance Input/Output Capacitance Note: These parameters are sampled but not 100% tested. AC CHARACTERISTICS AC Test Conditions PARAMETER Input Pulse Levels Input Rise and ...

Page 4

AC Characteristics, continued ( 10 0V for LL/L; - for LE Read Cycle PARAMETER Read Cycle Time Address Access Time Chip Select Access Time ...

Page 5

TIMING WAVEFORMS Read Cycle 1 (Address Controlled) Address D OUT Read Cycle 2 (Chip Select Controlled) #CS D OUT Read Cycle 3 (Output Enable Controlled) Address # ...

Page 6

Timing Waveforms, continued Write Cycle 1 Address #OE # Write Cycle 2 ( Fixed) IL Address # Notes: 1. During ...

Page 7

... Operation Recovery Time * T = Read Cycle Time RC DATA RETENTION WAVEFORM #CS ORDERING INFORMATION PART NO. ACCESS TIME (nS) W24257S-70LL 70 W24257S-70L 70 W24257S-70LE 70 W24257Q-70LL 70 W24257Q-70L 70 W24257Q-70LE 70 Notes: 1. Winbond reserves the right to make changes to its products without prior notice. 2. Purchasers are responsible for performing appropriate quality assurance testing on products intended for use in applications where personal injury might occur as a consequence of product failure ...

Page 8

BONDING PAD DIAGRAM A12 A14 I/ ...

Page 9

PACKAGE DIMENSIONS 28-pin SO Wide Body Seating Plane 28-pin Standard Type One TSOP Detail ...

Page 10

... W24257 DESCRIPTION , I SB1 ) Winbond Electronics North America Corp. Winbond Electronics North America Corp. Winbond Memory Lab. Winbond Memory Lab. Winbond Microelectronics Corp. Winbond Microelectronics Corp. Winbond Systems Lab. Winbond Systems Lab. 2727 N. First Street, San Jose, 2727 N. First Street, San Jose, CA 95134, U ...

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