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PDF IDT71682SA Data sheet ( Hoja de datos )
| Número de pieza | IDT71682SA | |
| Descripción | (IDT71681 / IDT71682) CMOS STATIC RAMS | |
| Fabricantes | IDT | |
| Logotipo |  |
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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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1 page  
IDT71681SA/LA, IDT71682SA/LA
CMOS STATIC RAMS 16K (4K x 4-BIT) Separate Data Inputs and Outputs
AC TEST CONDITIONS
Input Pulse Levels
Input Rise/Fall Times
Input Timing Reference Levels
Output Reference Levels
AC Test Load
GND to 3.0V
5ns
1.5V
1.5V
See Figures 1 and 2
2984 tbl 10
5V
DATAOUT
255Ω
480Ω
30pF*
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DATAOUT
255Ω
5V
480Ω
5pF*
2984 drw 05
Figure 1. AC Test Load
*Includes scope and jig capacitances
2984 drw 06
Figure 2. AC Test Load
(for tCLZ, tCHZ, tWHZ, and tOW)
AC ELECTRICAL CHARACTERISTICS(3) (VCC = 5.0V ± 10%, All Temperature Ranges)
71681x15
71682x15
71681x20
71682x20
71681x25
71682x25
Symbol
Parameter
Min. Max. Min. Max. Min. Max. Unit
Read Cycle
tRC Read Cycle Time
15 — 20 — 25 — ns
tAA Address Access Time
— 15 — 20 — 25 ns
tACS Chip Select Access Time
— 15 — 20 — 25 ns
tOH
tCLZ(2)
tCHZ(2)
tPU(2)
tPD(2)
Output Hold from Address Change
Chip Select to Output in Low-Z
Chip Select to Output in High-Z
Chip Select to Power Up Time
Chip Select to Power Down Time
3 — 3 — 3 — ns
5 — 5 — 5 — ns
— 7 — 9 — 10 ns
0 — 0 — 0 — ns
— 15 — 20 — 25 ns
AC ELECTRICAL CHARACTERISTICS(3) (Continued) (VCC = 5.0V ± 10%, All Temperature Ranges)
71681x35
71682x35
71681x45
71682x45
71681x55(1) 71681x70(1)
71682x55(1) 71682x70(1)
Symbol
Parameter
Min. Max. Min. Max. Min. Max. Min. Max. Unit
Read Cycle
tRC Read Cycle Time
35 — 45 — 55 — 70 — ns
tAA Address Access Time
— 35 — 45 — 55 — 70 ns
tACS Chip Select Access Time
— 35 — 45 — 55 — 70 ns
tOH Output Hold from Address Change
3 — 3 — 3 — 3 — ns
tCLZ(2) Chip Select to Output in Low-Z
5 — 5 — 5 — 5 — ns
tCHZ(2) Chip Select to Output in High-Z
— 15 — 20 — 25 — 30 ns
tPU(2) Chip Select to Power-Up Time
0 — 0 — 0 — 0 — ns
tPD(2) Chip Select to Power-Down Time
— 35 — 40 — 50 — 60 ns
NOTES:
1. –55°C to +125°C temperature range only.
2. This parameter guaranteed with AC Load (Figure 2) by device characterization, but is not production tested.
3. "x" in part numbers indicates power rating (SA or LA).
2984 tbl 11
5.3
5
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| PDF Descargar | [ Datasheet IDT71682SA.PDF ] | |
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