IDT71256SA Static RAM Datasheet

IDT71256SA Datasheet, PDF, Equivalent


Part Number

IDT71256SA

Description

CMOS Static RAM

Manufacture

Renesas

Total Page 9 Pages
Datasheet
Download IDT71256SA Datasheet


IDT71256SA
CMOS Static RAM
256K (32K x 8-Bit)
IDT71256SA
Features
32K x 8 advanced high-speed CMOS static RAM
Commercial (0° to 70°C) and Industrial (-40° to 85°C)
temperature options
Equal access and cycle times
– Commercial: 12ns
– Commercial and Industrial: 15/20/25ns
One Chip Select plus one Output Enable pin
Bidirectional data inputs and outputs directly
TTL-compatible
Low power consumption via chip deselect
Commercial product available in 28-pin 300-mil Plastic DIP,
300 mil Plastic SOJ and TSOP packages
Industrial product available in 28-pin 300 mil Plastic SOJ
and TSOP packages
Description
The IDT71256SA is a 262,144-bit high-speed Static RAM
organized as 32K x 8. It is fabricated using high-performance, high-
reliability CMOS technology. This state-of-the-art technology, com-
bined with innovative circuit design techniques, provides a cost-
effective solution for high-speed memory needs.
The IDT71256SA has an output enable pin which operates as fast
as 6ns, with address access times as fast as 12ns. All bidirectional
inputs and outputs of the IDT71256SA are TTL-compatible and
operation is from a single 5V supply. Fully static asynchronous
circuitry is used, requiring no clocks or refresh for operation.
The IDT71256SA is packaged in 28-pin 300-mil Plastic DIP, 28-
pin 300 mil Plastic SOJ and TSOP.
Functional Block Diagram
A0
A1
A2
A3
A4
A5
A6 ADDRESS
A7
A8 DECODER
A9
A10
A11
A12
A13
A14
262,144-BIT
MEMORY
ARRAY
,
I/O0 - I/O7 8
8
I/O CONTROL
CS
WE CONTROL
OE LOGIC
©2014 Integrated Device Technology, Inc.
1
2948 drw 01
NOVEMBER 2014
DSC-2948/11

IDT71256SA
IDT71256SA
CMOS Static RAM 256K (32K x 8-Bit)
Pin Configurations
A14 1
A12 2
28 VCC
27 WE
A7 3
26 A13
A6 4
25 A8
A5 5
24 A9
A4 6
23 A11
A3
A2
7 SO28 22 OE
P28
8
21 A10
A1 9
20 CS
A0 10
19 I/O7
I/O0 11
18 I/O6
I/O1 12
17 I/O5
I/O2 13
16 I/O4
GND 14
15 I/O3
2948 drw 02
DIP/SOJ
Top View
OE
A11
A9
A8
A13
WE
VCC
A14
A12
A7
A6
A5
A4
A3
22
23
24
25
26
27
28
1
2
3
4
5
6
7
SO28
TSOP
Top View
21 A10
20 CS
19 I/O7
18 I/O6
17 I/O5
16 I/O4
15 I/O3
14 GND
,13 I/O2
12 I/O1
11 I/O0
10 A0
9 A1
8 A2
2948 drw 02a
Commercial and Industrial Temperature Ranges
Absolute Maximum Ratings(1)
Symbol
Rating
Value
Unit
VCC Supply Voltage
Relative to GND
-0.5 to +7.0
V
VTERM
Terminal Voltage
Relative to GND
-0.5 to VCC+0.5
V
TBIAS
Temperature Under Bias
-55 to +125
oC
TSTG Storage Temperature
-55 to +125
oC
PT Power Dissipation
1.0 W
IOUT DC Output Current
50 mA
NOTE:
2948 tbl 02
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 conditions for extended periods may affect
reliability.
Truth Table(1,2)
CS OE WE
I/O
Function
L L H DATAOUT Read Data
L X L DATAIN Write Data
L H H High-Z Outputs Disabled
H X X High-Z Deselecte d - Standby (ISB)
VHC(3)
X
X High-Z Deselecte d - Standby (ISB1)
NOTES:
1. H = VIH, L = VIL, x = Don't care.
2. VLC = 0.2V, VHC = VCC –0.2V.
3. Other inputs VHC or VLC.
2948 tbl 03
Recommended Operating
Temperature and Supply Voltage
Grade
Temperature
GND
Vcc
Commercial
0OC to +70OC
0V
4.5V ± 5.5V
Industrial
-40OC to +85OC
0V
4.5V ± 5.5V
2948 tbl 01
Recommended DC Operating
Conditions
Symbol
Parameter
Min. Typ. Max.
Unit
VCC Supply Voltage
4.5 5.0 5.5 V
GND Ground
00
0V
VIH Input High Voltage
2.2 ____ VCC +0.5 V
VIL Input Low Voltage
-0.5(1) ____ 0.8 V
NOTE:
2948 tbl 04
1. VIL (min.) = –1.5V for pulse width less than 10ns, once per cycle.
2


Features CMOS Static RAM 256K (32K x 8-Bit) IDT7 1256SA Features ◆ 32K x 8 advanced h igh-speed CMOS static RAM ◆ Commercia l (0° to 70°C) and Industrial (-40° to 85°C) temperature options ◆ Equal access and cycle times – Commercial: 12ns – Commercial and Industrial: 15 /20/25ns ◆ One Chip Select plus one O utput Enable pin ◆ Bidirectional data inputs and outputs directly TTL-compat ible ◆ Low power consumption via chip deselect ◆ Commercial product availa ble in 28-pin 300-mil Plastic DIP, 300 mil Plastic SOJ and TSOP packages ◆ I ndustrial product available in 28-pin 3 00 mil Plastic SOJ and TSOP packages D escription The IDT71256SA is a 262,144- bit high-speed Static RAM organized as 32K x 8. It is fabricated using high-pe rformance, highreliability CMOS technol ogy. This state-of-the-art technology, combined with innovative circuit design techniques, provides a costeffective s olution for high-speed memory needs. Th e IDT71256SA has an output enable pin which operates as fast as 6ns, with address acces.
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