W24256-70 Winbond, W24256-70 Datasheet

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W24256-70

Manufacturer Part Number
W24256-70
Description
32K X 8 CMOS STATIC RAM
Manufacturer
Winbond
Datasheet

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W24256-70L
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W24256-70L
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W24256-70LL
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GENERAL DESCRIPTION
The W24256 is a normal speed, very low power CMOS static RAM organized as 32768
operates on a single 5-volt power supply. This device is manufactured using Winbond's high
performance CMOS technology.
FEATURES
PIN CONFIGURATIONS
Standby :250 W
Low power consumption:
Access time: 70 nS (max.)
Active :300 mW
Single 5V power supply
Fully static operation
All inputs and outputs directly TTL compatible
V
A14
A13
WE
A12
A11
OE
A7
A6
A3
A9
A8
A5
A4
DD
I/O1
I/O2
I/O3
V
A14
A12
A7
A6
A5
A4
A3
A2
A0
SS
A1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28-pin
TSOP
28-pin
DIP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
I/O5
I/O4
V
WE
A13
A8
A9
A11
OE
A10
CS
I/O8
I/O7
I/O6
DD
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
V
I/O3
I/O2
I/O1
A0
A1
A2
SS
32K
- 1 -
BLOCK DIAGRAM
PIN DESCRIPTION
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
mm)
SYMBOL
I/O1 I/O8
A0 A14
V
V
WE
OE
CS
8 CMOS STATIC RAM
DD
SS
WE
OE
CS
A12
A14
A2
A3
A4
A5
A6
A7
A13
I/O1
I/O8
Publication Release Date: October 1999
Preliminary W24256
CLK GEN.
Address Inputs
Data Inputs/Outputs
Chip Select Input
Write Enable Input
Output Enable Input
Power Supply
Ground
DATA
CNTRL.
CLK
GEN.
W
R
O
D
E
C
O
D
E
R
A11
COLUMN DECODER
DESCRIPTION
CORE CELL ARRAY
PRECHARGE CKT.
64 X 8 COLUMNS
A10 A1 A0 A8 A9
512 ROWS
I/O CKT.
Revision A1
8 bits that
13.4

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W24256-70 Summary of contents

Page 1

... GENERAL DESCRIPTION The W24256 is a normal speed, very low power CMOS static RAM organized as 32768 operates on a single 5-volt power supply. This device is manufactured using Winbond's high performance CMOS technology. FEATURES Low power consumption: Access time (max.) Active :300 mW Standby :250 W ...

Page 2

... (max +2 -1 (max.), I Cycle = min , Duty = 100 % (min.), Cycle = min. IH Duty = 100 -0. and Preliminary W24256 I/O1 I/O8 V CURRENT RATING UNIT MIN. TYP.* MAX. ...

Page 3

... See the drawing below 1 TTL OUTPUT 100 pF Including Jig and Scope (For T T CLZ, OLZ, CHZ, OHZ, WHZ, OW 90% 3.0V 90% 10% 10 Preliminary W24256 MAX. UNIT CONDITIONS 1 TTL 5 pF Including Jig and Scope Publication Release Date: October 1999 ...

Page 4

... Output Active from End of Write These parameters are sampled but not 100% tested SYM. W24256-70L/LL MIN ACS T AOE T * CLZ T * OLZ T * CHZ T * OHZ T OH SYM. W24256-70L/LL MIN CS WHZ T * ...

Page 5

... TIMING WAVEFORMS Read Cycle 1 (Address Controlled) Address D OUT Read Cycle 2 (Chip Select Controlled OUT Read Cycle 3 (Output Enable Controlled) Address OUT Preliminary W24256 ACS T CLZ AOE T OLZ T ACS T CLZ Publication Release Date: October 1999 ...

Page 6

... During this period, I/O pins are in the output state, so input signals of opposite phase to the outputs should not be applied. 2. The data output from D are the same as the data written to D OUT 3. D provides the read data for the next address. OUT 4. Transition is measured 500 mV from steady state with C Preliminary W24256 ...

Page 7

... Read Cycle Time DATA RETENTION WAVEFORM ORDERING INFORMATION PART NO. ACCESS TIME (nS) W24256-70L 70 W24256-70LL 70 W24256S-70L 70 W24256S-70LL 70 W24256Q-70L 70 W24256Q-70LL 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

... Base Plane 1 Seating Plane Detail See Detail Preliminary W24256 Dimension in Inches Dimension in mm Symbol Min. Nom. Max. Min. Nom. Max. A 0.210 5.33 A 0.010 0. 0.150 0.155 0.160 3.81 3.94 4. 0.016 0.018 ...

Page 9

... Package Dimensions, continued 28-pin Standard Type One TSOP Preliminary W24256 Dimension In Inches Dimension In mm Symbol Max. Min. Nom. Max. Min. Nom. A 1.20 0.047 A 0.05 0.002 0.006 0. 0.95 1.00 0.035 0.040 0.041 1. 0.17 0.20 0.27 0.007 0.008 0.011 c 0 ...

Page 10

... Winbond Electronics (H.K.) Ltd. Rm. 803, World Trade Square, Tower II, 123 Hoi Bun Rd., Kwun Tong, Kowloon, Hong Kong TEL: 852-27513100 FAX: 852-27552064 - 10 - Preliminary W24256 DESCRIPTION Winbond Electronics North America Corp. Winbond Memory Lab. Winbond Microelectronics Corp. Winbond Systems Lab. 2727 N. First Street, San Jose, CA 95134, U ...

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