Preliminary W24258C
32K × 8 CMOS STATIC RAM
Publication Release Date: December 1998
- 1 - Revision A1
GENERAL DESCRIPTION
The W24258C is a normal speed, very low power CMOS static RAM organized as 32768 × 8 bits that
operates on a wide voltage range from 2.7V to 5.5V power supply. This device is manufactured using
Winbond's high performance CMOS technology.
FEATURES
•Low power consumption:
−Active: 350 mW (max.)
−Standby: 6 µW (max.)/3V
25 µW (max.)/5V
•Access time: 70 nS (max.)/5V
100 nS (max.)/3V
•Single 3V/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
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
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
1
0
1
1
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28-pin
TSOP
OE
A11
A9
A8
A13
WE
VDD
A14
A12
A7
A6
A5
A4
A3
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
I/O3
I/O2
I/O1
A0
A1
A2
V
SS
BLOCK DIAGRAM
CLK GEN. PRECHARGE CKT.
CORE CELL ARRAY
512 ROWS
64 X 8 COLUMNS
DATA
CNTRL.
CLK
GEN.
R
O
W
D
E
C
O
D
E
R
A12
A14
A2
A3
A4
A5
A6
A7
A13
A11
I/O CKT.
COLUMN DECODER
OE
WE
CS
I/O1
I/O8
A10 A1 A0 A8 A9
PIN DESCRIPTION
SYMBOL DESCRIPTION
A0−A14 Address Inputs
I/O1−I/O8 Data Inputs/Outputs
CS
Chip Select Input
WE
Write Enable Input
OE
Output Enable Input
VDD Power Supply
VSS Ground
Preliminary W24258C
- 2 -
TRUTH TABLE
CS
OE
WE
MODE I/O1
−
I/O8 VDD CURRENT
HX X Not Selected High Z ISB, ISB1
LH H Output Disable High Z IDD
L L HRead Data Out IDD
LXLWrite Data In IDD
DC CHARACTERISTICS
Absolute Maximum Ratings
PARAMETER RATING UNIT
Supply Voltage to VSS Potential -0.5 to +7.0 V
Input/Output to VSS Potential -0.5 to VDD +0.5 V
Allowable Power Dissipation 1.0 W
Storage Temperature -65 to +150 °C
Operating Temperature 0 to 70 °C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.
Operating Characteristics
(VDD = 5V ±10%; VDD = 3V ±10%; VSS = 0V; TA = 0 to 70°C)
PARAMETER SYM. TEST CONDITIONS 5V
±
10% 3V
±
10% UNIT
MIN. MAX. MIN. MAX.
Input Low Voltage VIL --0.5 +0.8 -0.5 +0.6 V
Input High Voltage VIH -+2.2 VDD +0.5 +2.0 VDD +0.5 V
Input Leakage
Current ILI VIN = VSS to VDD -1 +1 -1 +1 µA
Output Leakage
Current ILO VI/O = VSS to VDD,
CS
= VIH (min.) or
OE
= VIH (min.) or
WE
= VIL (max.)
-1 +1 -1 +1 µA
Output Low Voltage VOL IOL = +2.1 mA -0.4 -0.4 V
Output High
Voltage VOH IOH = -1.0 mA 2.4 -2.2 -V
Preliminary W24258C
Publication Release Date: December 1998
- 3 - Revision A1
Operating Characteristics, continued
PARAMETER SYM. TEST CONDITIONS 5V
±
10% 3V
±
10% UNIT
MIN. TYP. MAX. MIN. TYP. MAX.
Operating
Power Supply
Current
IDD
CS
= VIL (max.), I/O = 0
mA, Cycle = min;
Duty = 100%
- - 70 - - 30 mA
Standby
Power Supply
ISB
CS
= VIH (min.),
Cycle = min; Duty = 100%
- - 3- - 1mA
Current ISB1
CS
≥ VDD -0.2V -0.7 5-0.5 2µA
Note: Typical parameter is measured under ambient temperature TA = 25° C and VDD = 5V/ 3V.
CAPACITANCE
(VDD = 5V, TA = 25° C, f = 1 MHz)
PARAMETER SYM. CONDITIONS MAX. UNIT
Input Capacitance CIN VIN = 0V 6pF
Input/Output Capacitance CI/O VOUT = 0V 8pF
Note: These parameters are sampled but not 100% tested.
AC CHARACTERISTICS
AC Test Conditions
PARAMETER CONDITIONS
Input Pulse Levels 3V ±10%, 0V to 2.4V
5V ±10%, 0V to 3.0V
Input Rise and Fall Times 5 nS
Input and Output Timing Reference Level 1.5V
Output Load See the drawing below
AC Test Loads and Waveform
90% 90%
5 nS
10%
5 nS 10%
OUTPUT OUTPUT
2.4V/3.0V
0V
100 pF
Including
Jig and
Scope
5 pF
Including
Jig and
Scope
1 TTL 1 TTL
CLZ, OLZ, CHZ, OHZ, WHZ, OW
(For T T T T T T )
Preliminary W24258C
- 4 -
AC Characteristics, continued
(VDD = 5V ±10%; VDD = 3V ±10%; VSS = 0V; TA = 0 to 70°C)
Read Cycle
PARAMETER SYM. 5V 3V UNIT
MIN. MAX. MIN. MAX.
Read Cycle Time TRC 70 -100 -nS
Address Access Time TAA -70 -100 nS
Chip Select Access Time TACS -70 -100 nS
Output Enable to Output Valid TAOE -35 -50 nS
Chip Selection to Output in Low Z TCLZ*10 -15 -nS
Output Enable to Output in Low Z TOLZ*5-5-nS
Chip Deselection to Output in High Z TCHZ*-30 -35 nS
Output Disable to Output in High Z TOHZ*-30 -35 nS
Output Hold from Address Change TOH 10 -15 -nS
∗ These parameters are sampled but not 100% tested
Write Cycle
PARAMETER SYM. 5V 3V UNIT
MIN. MAX. MIN. MAX.
Write Cycle Time TWC 70 -100 -nS
Chip Selection to End of Write TCW 50 -70 -nS
Address Valid to End of Write TAW 50 -70 -nS
Address Setup Time TAS 0-0-nS
Write Pulse Width TWP 50 -70 -nS
Write Recovery Time
CS
,
WE
TWR 0-0-nS
Data Valid to End of Write TDW 30 -50 -nS
Data Hold from End of Write TDH 0-0-nS
Write to Output in High Z TWHZ*-25 -30 nS
Output Disable to Output in High Z TOHZ*-25 -30 nS
Output Active from End of Write TOW 5-10 -nS
∗ These parameters are sampled but not 100% tested
Preliminary W24258C
Publication Release Date: December 1998
- 5 - Revision A1
TIMING WAVEFORMS
Read Cycle 1
(Address Controlled)
Address
TRC
T
AA
TOH TOH
DOUT
Read Cycle 2
(Chip Select Controlled)
CS
DOUT TCLZ
TACS CHZ
T
Read Cycle 3
(Output Enable Controlled)
Address
TRC
CS
DOUT
TAA
OE
TAOE
TOLZ
TOH
CLZTCHZ
T
TACS TOHZ
Preliminary W24258C
- 6 -
Timing Waveforms, continued
Write Cycle 1
Address
OE
CS
WE
DOUT
DIN
TWC
TWR
TCW
TWP
TAS
TOHZ (1, 4)
TDW TDH
TAW
Write Cycle 2
(
OE
= VIL Fixed)
Address
CS
WE
DOUT
DIN
TWC
TCW
TAS
TDH
TWR
TWP
TWHZ
DW
T
(2) (3)
TOW
TOH
AWT
(1, 4)
Notes:
1. 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 DOUT are the same as the data written to DIN during the write cycle.
3. DOUT provides the read data for the next address.
4. Transition is measured ±500 mV from steady state with CL = 5 pF. This parameter is guaranteed but not 100% tested.
Preliminary W24258C
Publication Release Date: December 1998
- 7 - Revision A1
DATA RETENTION CHARACTERISTICS
(TA = 0 to 70°C)
PARAMETER SYM. TEST CONDITIONS MIN. TYP. MAX. UNIT
VDD for Data Retention VDR
CS
≥ VDD -0.2V 2.0 - - V
Data Retention Current IDDDR
CS
≥ VDD -0.2V, VDD = 3V - - 2µA
Chip Deselect to Data
Retention Time TCDR See data retention waveform 0- - nS
Operation Recovery Time TRTRC*- - nS
* Read Cycle Time
DATA RETENTION WAVEFORM
TCDR
VDD
VIH
TR
VIH
CS
VDR 2V
=
>
-0.2V
DD
VCS =
>
0.9 DD
V0.9 DD
V
ORDERING INFORMATION
PART NO. ACCESS
TIME (nS) OPERATING
VOLTAGE (V) OPERATING
TEMPERATURE
(
°
C)
PACKAGE
W24258C-70LL 70 5V 0 to 70 600 mil DIP
W24258CS70LL 70 5V 0 to 70 330 mil SOP
W24258CQ70LL 70 5V 0 to 70 Standard type one
TSOP
W24258C-70LE 70/100 5V/3V 0 to 70 600 mil DIP
W24258CS70LE 70/100 5V/3V 0 to 70 330 mil SOP
W24258CQ70LE 70/100 5V/3V 0 to 70 Standard type one
TSOP
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.
Preliminary W24258C
- 8 -
PACKAGE DIMENSIONS
28-pin P-DIP
Seating Plane
1. Dimensions D Max. & S include mold flash or
tie bar burrs.
2. Dimension E1 does not include interlead flash.
3. Dimensions D & E1 include mold mismatch and
are determined at the mold parting line.
6. General appearance spec. should be based on
final visual inspection spec.
1.631.47
0.0640.058
Notes:
Symbol Min. Nom. Max. Max.
Nom.
Min.
Dimension in Inches Dimension in mm
A
B
c
D
e
A
L
S
A
A1
2
E
0.060 1.52
0.210 5.33
0.010
0.150
0.016
0.155
0.018
0.160
0.022
3.81
0.41
0.25
3.94
0.46
4.06
0.56
0.008
0.120
0.670
0.010
0.130
0.014
0.140
0.20
3.05
0.25
3.30
0.36
3.56
0.540 0.5500.545 13.72 13.9713.84
17.02
15.24
14.99 15.49
0.6000.590 0.610
2.29 2.54 2.790.090 0.100 0.110
B1
1
e
E1
a
1.460 1.470 37.08 37.34
0 15
0.090 2.29
0.6500.630 16.00 16.51
4. Dimension B1 does not include dambar
protrusion/intrusion.
5. Controlling dimension: Inches.
150
eA
2
A
a
c
E
Base Plane
1A
1
e
L
A
S
1
E
D
1
B
B
28
1
15
14
28-pin SOP Wide Body
1. Dimensions D Max. & S include mold flash
or tie bar burrs.
2. Dimension b does not include dambar
protrusion/intrusion.
3. Dimensions D & E include mold mismatch
and determined at the mold parting line.
.
0.250.20
0.0100.008
Notes:
Symbol Min. Nom. Max. Max.
Nom.
Min.
Dimension in Inches Dimension in mm
0.014 0.36
0.112 2.85
0.004
0.093
0.014
0.098
0.016
0.103
0.020
2.36
0.36
0.10
2.49
0.41
2.62
0.51
0.059
0.004
0 10
0.713
0.067
0.733
0.075 1.50
18.11
1.70
18.62
1.91
0.477
0.4650.453 12.1211.8111.51
010
0.10
8.53
8.41
8.28
0.3360.3310.326
0.71 0.91 1.120.028 0.036 0.044
4. Controlling dimension: Inches.
5. General appearance spec should be based
on final visual inspection spec.
1.12 1.27 1.420.044 0.050 0.056
1.190.047
2
1
A
28 15
14
1
e
S
EH
b
Seating Plane
AA
yL
L
e
c
See Detail F
D
E
E
1
1
e
Detail F
A
b
c
D
e
HE
L
y
A
A
LE
1
2
E
S
θ
θ
Preliminary W24258C
Publication Release Date: December 1998
- 9 - Revision A1
Package Dimensions, continued
28-pin Standard Type One TSOP
A
A
A
2
1
L
L1
Y
c
E
H
D
D
b
e
Controlling dimension: Millimeters
Min.
Dimension In Inches
Nom. Max. Min. Nom. Max.
Symbol
1.20
0.05 0.15
1.05
1.000.95
0.17
0.10
11.70
7.90
13.20
0.50
0.00
0
0.20 0.27
0.15 0.21
11.80 11.90
8.00 8.10
13.40 13.60
0.55
0.60 0.70
0.25
0.10
35
0.047
0.006
0.041
0.040
0.035
0.007 0.008 0.011
0.004 0.006 0.008
0.461 0.465 0.469
0.311 0.315 0.319
0.520 0.528 0.536
0.022
0.020 0.024 0.028
0.010
0.000 0.004
035
0.002
A
A
b
c
D
E
e
L
L
Y
1
1
2
A
HD
θ
Dimension In mm
θ
1
Preliminary W24258C
- 10 -
VERSION HISTORY
VERSION DATE PAGE DESCRIPTION
A1 Dec. 1998 -Initial Issued
Headquarters
No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: 886-3-5770066
FAX: 886-3-5796096
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-27197006
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-27190505
FAX: 886-2-27197502
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
Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.
2727 N. First Street, San Jose,
CA 95134, U.S.A.
TEL: 408-9436666
FAX: 408-5441798
Note: All data and specifications are subject to change without notice.
