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Integrated Device Technology Electronic Components Datasheet

IDT71681LA Datasheet

(IDT71681 / IDT71682) CMOS STATIC RAMS

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Integrated Device Technology, Inc.
CMOS STATIC RAMS
16K (4K x 4-BIT)
Separate Data Inputs and Outputs
IDT71681SA/LA
IDT71682SA/LA
FEATURES:
• Separate data inputs and outputs
• IDT71681SA/LA: outputs track inputs during write mode
• IDT71682SA/LA: high-impedance outputs during write
mode
• High speed (equal access and cycle time)
— Military: 15/20/25/35/45/55/70/85/100ns (max.)
— Commercial: 15/20/25/35/45ns (max.)
• Low power consumption
• Battery backup operation—2V data retention (LA version
only)
• High-density 24-pin 300-mil Ceramic or Plastic DIP, 24-
pin CERPACK, and 28-pin leadless chip carrier
• Produced with advanced CMOS high-performance
technology
• CMOS process virtually eliminates alpha particle soft-
error rates
• Military product compliant to MIL-STD-883, Class B
DESCRIPTION:
The IDT71681/IDT71682 are 16,384-bit high-speed static
RAMs organized as 4K x 4. They are fabricated using IDT’s
high-performance, high-reliability technology—CMOS. This
state-of-the-art technology, combined with innovative circuit
design techniques, provides a cost-effective approach for
high-speed memory applications.
Access times as fast as 15ns are available. These circuits
also offer a reduced power standby mode. When CS goes
HIGH, the circuit will automatically go to, and remain in, this
standby mode as long as CS remains HIGH. In the standby
mode, the devices consume less than 10µW, typically. This
capability provides significant system-level power and cooling
savings. The low-power (LA) versions also offer a battery
backup data retention capability where the circuit typically
consumes only 1µW operating off a 2V battery.
All inputs and outputs of the IDT71681/IDT71682 are TTL-
compatible and operate from a single 5V supply.
FUNCTIONAL BLOCK DIAGRAM
A0
ADDRESS
DECODER
A11
D4
D3
INPUT
DATA
D2 CONTROL
D1
16,384-BIT
MEMORY ARRAY
I/O CONTROL
W E IDT71682 ONLY
IDT71681 ONLY
CS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1994 Integrated Device Technology, Inc.
5.3
VCC
GND
Y4
Y3
Y2
Y1
2984 drw 01
MAY 1994
DSC-1018/3
1
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Integrated Device Technology Electronic Components Datasheet

IDT71681LA Datasheet

(IDT71681 / IDT71682) CMOS STATIC RAMS

No Preview Available !

IDT71681SA/LA, IDT71682SA/LA
CMOS STATIC RAMS 16K (4K x 4-BIT) Separate Data Inputs and Outputs
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DESCRIPTION (Continued):
The IDT71681/IDT71682 are packaged in either space-
saving 24-pin, 300-mil DlPs, CERPACKS, or 28-pin leadless
chip carriers.
Military grade product is manufactured in compliance with
the latest revision of MIL-STD-883, Class B, making it ideally
suited to military temperature applications demanding the
highest level of performance and reliability.
PIN CONFIGURATIONS
A0
A1
A2
A3
A4
A5
A6
A7
D1
D2
CS
GND
1 24
2 23
3 22
4 21
5 P24-1, 20
6 D24-1, 19
7
&
E24-1
18
8 17
9 16
10 15
11 14
12 13
VCC
A11
A10
A9
A8
D4
D3
Y4
Y3
Y2
Y1
WE
2984 drw 02
DIP/SOIC/SOJ/CERPACK
TOP VIEW
INDEX
A4
A5
NC
NC
A6
A7
D1
4 3 2 28 27 26
5 1 25
6 24
7 23
8
L28-1
22
9 21
10 20
11 19
12 13 14 15 16 17 18
A9
A8
D4
NC
NC
D3
Y4
2984 drw 03
PIN DESCRIPTIONS
Name
Description
A0 – A11
Address Inputs
CS Chip Select
WE Write Enable
D1 – D4
DATAIN
Y1 – Y4
DATAOUT
VCC
Power
GND
Ground
2984 tbl 01
TRUTH TABLE(3)
Mode CS WE Output Power
Standby
H
X
High-Z
Standby
Read
Write(1)
L
L
H
L
Write(2)
L
L
NOTES:
1. For IDT71681 only.
2. For IDT71682 only.
3. H = VIH, L = VIL, X = don't care.
DATAOUT
DATAIN
High-Z
Active
Active
Active
2984 tbl 02
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
Com’l.
Mil. Unit
VTERM
Terminal Voltage –0.5 to +7.0 –0.5 to +7.0
with Respect
to GND
V
TA Operating
Temperature
0 to +70 –55 to +125 °C
TBIAS
Temperature
Under Bias
–55 to +125 –65 to +135 °C
TSTG
Storage
Temperature
–55 to +125 –65 to +150 °C
PT
Power Dissipation
1.0
1.0 W
IOUT
DC Output
Current
50 50 mA
NOTE:
2984 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
conditions for extended periods may affect reliability.
LCC
TOP VIEW
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol
Parameter(1)
Conditions Max. Unit
CIN Input Capacitance
VIN = 0V
8 pF
COUT Output Capacitance
VOUT = 0V
8 pF
NOTE:
2984 tbl 04
1. This parameter is determined by device characterization, but is not
production tested.
5.3
2
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Part Number IDT71681LA
Description (IDT71681 / IDT71682) CMOS STATIC RAMS
Maker IDT
Total Page 8 Pages
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