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IDT71256S Datasheet(PDF) 2 Page - Integrated Device Technology

Part No. IDT71256S
Description  CMOS STATIC RAM 256K (32K x 8-BIT)
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Maker  IDT [Integrated Device Technology]
Homepage  http://www.idt.com
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 2 page
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7.2
2
IDT71256 S/L
CMOS STATIC RAM 256K (32K x 8-BIT)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
TRUTH TABLE
(1)
WE
WE
CS
CS
OE
OE
I/O
Function
X
H
X
High-Z
Standby (ISB)
XVHC
X
High-Z
Standby (ISB1)
H
L
H
High-Z
Output Disabled
HL
L
DOUT
Read Data
LL
X
DIN
Write Data
NOTE:
2946 tbl 02
1. H = VIH, L = VIL, X = Don’t Care
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Rating
Com’l.
Mil.
Unit
VTERM
Terminal Voltage
–0.5 to +7.0
–0.5 to +7.0
V
with Respect
to GND
TA
Operating
0 to +70
–55 to +125
°C
Temperature
TBIAS
Temperature
–55 to +125
–65 to +135
°C
Under Bias
TSTG
Storage
–55 to +125
–65 to +150
°C
Temperature
PT
Power Dissipation
1.0
1.0
W
IOUT
DC Output
50
50
mA
Current
NOTE:
2946 tbl 03
1. Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other
conditions above those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating con-
ditions for extended periods may affect reliability.
CAPACITANCE (TA = +25
°C, f = 1.0MHz)
Symbol
Parameter
(1)
Conditions
Max. Unit
CIN
Input Capacitance
VIN = 0V
11
pF
CI/O
I/O Capacitance
VOUT = 0V
11
pF
NOTE:
2946 tbl 04
1. This parameter is determined by device characterization, but is not
production tested.
PIN DESCRIPTIONS
Name
Description
A0–A14
Addresses
I/O0I/O7
Data Input/Output
CS
Chip Select
WE
Write Enable
OE
Output Enable
GND
Ground
VCC
Power
2946 tbl 01
2946 drw 02
5
6
7
8
9
10
11
12
A12
1
2
3
4
24
23
22
21
20
19
18
17
D28-3
P28-1
P28-2
D28-1
SO28-5
13
14
28
27
26
25
A7
A6
A5
A4
A3
A2
A1
A0
I/O 0
I/O 1
V CC
WE
A8
A9
A11
OE
A10
CS
I/O 7
16
15
I/O 2
GND
I/O 6
I/O 5
I/O 4
I/O 3
A14
A13
32-Pin LCC
TOP VIEW
DIP/SOJ
TOP VIEW
5
6
7
8
9
10
11
L32-1
29
28
27
26
25
24
23
15 16 17 18 19
32
1
32 31
INDEX
A3
A2
OE
NC
A8
A9
A11
A10
CS
12
22
13
21
A6
A5
A4
2946 drw 03
A1
A0
I/O0
4
30
20
14
I/O7
I/O6
NC




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