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White Electronic Designs

WMS256K16-xxx Datasheet Preview

WMS256K16-xxx Datasheet

256Kx16 MONOLITHIC SRAM

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White Electronic Designs
WMS256K16-XXX
256Kx16 MONOLITHIC SRAM, SMD 5962-96902
FEATURES
■ Access Times 17, 20, 25, 35ns
■ MIL-STD-883 Compliant Devices Available
■ Packaging
• 44 pin Ceramic SOJ (Package 102)
• 44 lead Ceramic Flatpack (Package 225)
• 44 lead Formed Ceramic Flatpack
■ Organized as 256Kx16
■ Data Byte Control:
• Lower Byte (LB#) = I/O1-8
• Upper Byte (UB#) = I/O9-16
■ 2V Minimum Data Retention for battery back up
operation (WMS256K16L-XXX Low Power Version
Only)
■ Commercial, Industrial and Military Temperature
Range
■ 5V Power Supply
■ Low Power CMOS
■ TTL Compatible Inputs and Outputs
PIN CONFIGURATION FOR WMS256K16-XXX
44 CSOJ
44 FlatpacK
TOP VIEW
A0
A1
A2
A3
A4
CS#
I/O1
I/O2
I/O3
I/O4
VCC
GND
I/O5
I/O6
I/O7
I/O8
WE#
A5
A6
A7
A8
A9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44 A17
43 A16
42 A15
41 OE#
40 UB#
39 LB#
38 I/O16
37 I/O15
36 I/O14
35 I/O13
34 GND
33 VCC
32 I/O12
31 I/O11
30 I/O10
29 I/O9
28 NC
27 A14
26 A13
25 A12
24 A11
23 A10
PIN DESCRIPTION
A0-17
LB#
UB#
I/O1-16
CS#
OE#
WE#
VCC
GND
NC
Address Inputs
Lower-Byte Control (I/O1-8)
Upper-Byte Control (I/O9-16)
Data Input/Output
Chip Select
Output Enable
Write Enable
+5.0V Power
Ground
No Connection
August 2004
Rev. 6
1 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com




White Electronic Designs

WMS256K16-xxx Datasheet Preview

WMS256K16-xxx Datasheet

256Kx16 MONOLITHIC SRAM

No Preview Available !

White Electronic Designs
WMS256K16-XXX
TRUTH TABLE
CS# WE# OE# LB# UB# Mode
H X X X X Not Select
LHHXX
Output Disable
L X XHH
LH
L H L H L Read
LL
LH
L L X H L Write
LL
Data I/O
I/O1-8
I/O9-16
High Z
High Z
High Z
High Z
Data Out
High Z
Data Out
Data In
High Z
Data In
High Z
Data Out
Data Out
High Z
Data In
Data In
Power
Standby
Active
Active
Active
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Min Max
Operating Temperature
TA -55 +125
Storage Temperature
TSTG -65 +150
Signal Voltage Relative to GND VG
-0.5 VCC+0.5
Junction Temperature
TJ
150
Supply Voltage
VCC -0.5 7.0
Unit
°C
°C
V
°C
V
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage
Input High Voltage
Input Low Voltage
Operating Temp. (Mil.)
Symbol
VCC
VIH
VIL
TA
Min Max Unit
4.5 5.5
V
2.2 VCC + 0.3 V
-0.3 +0.8
V
-55 +125 °C
CAPACITANCE
TA = +25°C
Parameter
Input capacitance
Output capacitance
Symbol
CIN
COUT
Condition
VIN = 0V, f = 1.0MHz
VOUT = 0V, f = 1.0MHz
This parameter is guaranteed by design but not tested.
Max Unit
20 pF
20 pF
DC CHARACTERISTICS
VCC = 5.0V, GND = 0V, -55°C ≤ TA ≤ +125°C
Parameter
Symbol Conditions
Input Leakage Current
Output Leakage Current
Operating Supply Current
Standby Current
Output Low Voltage
Output High Voltage
ILI VCC = 5.5, VIN = GND to VCC
ILO CS# = VIH, OE# = VIH, VOUT = GND to VCC
ICC CS# = VIL, OE# = VIH, f = 5MHz, VCC = 5.5
ISB CS# = VIH, OE# = VIH, f = 5MHz, VCC = 5.5
VOL IOL = 6mA, VCC = 4.5
VOH IOH = -4.0mA, VCC = 4.5
NOTE: DC test conditions: VIH = VCC -0.3V, VIL = 0.3V
Min
Max
Units
10 µA
10 µA
275 mA
17 mA
0.4 V
2.4 V
LOW POWER DATA RETENTION CHARACTERISTICS (WMS256K16L-XXX ONLY)
-55°C ≤ TA ≤ +125°C
Parameter
Symbol Conditions
Min Typ Max
Data Retention Supply Voltage
Data Retention Current
VDR
ICCDR1
CS# ≥ VCC -0.2V
VCC = 3V
2.0 5.5
1.0 8.0
Units
V
mA
August 2004
Rev. 6
2 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com


Part Number WMS256K16-xxx
Description 256Kx16 MONOLITHIC SRAM
Maker White Electronic Designs
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