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IDT71V321S35PF fiches techniques PDF

Integrated Device Technology - HIGH-SPEED 3.3V 2K x 8 DUAL-PORT STATIC RAM WITH INTERRUPT

Numéro de référence IDT71V321S35PF
Description HIGH-SPEED 3.3V 2K x 8 DUAL-PORT STATIC RAM WITH INTERRUPT
Fabricant Integrated Device Technology 
Logo Integrated Device Technology 





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IDT71V321S35PF fiche technique
Integrated Device Technology, Inc.
HIGH-SPEED 3.3V
2K x 8 DUAL-PORT
STATIC RAM WITH INTERRUPT
IDT71V321S/L
FEATURES:
• High-speed access
—Commercial: 25/35/55ns (max.)
• Low-power operation
—IDT71V321S
—Active: 250mW (typ.)
—Standby: 3.3mW (typ.)
—IDT71V321L
—Active: 250mW (typ.)
—Standby: 660µW (typ.)
• Two INT flags for port-to-port communications
• On-chip port arbitration logic
BUSY output flag
• Fully asynchronous operation from either port
• Battery backup operation—2V data retention
• TTL-compatible, single 3.3V ±0.3V power supply
• Available in popular plastic packages
DESCRIPTION:
The IDT71V321 is a high-speed 2K x 8 Dual-Port Static
RAMs with internal interrupt logic for interprocessor com-
munications. The IDT71V321 is designed to be used as a
stand-alone 8-bit Dual-Port RAM.
The device provides two independent ports with sepa-
rate control, address, and I/O pins that permit independent,
asynchronous access for reads or writes to any location in
memory. An automatic power down feature, controlled by
CE, permits the on chip circuitry of each port to enter a very
low standby power mode.
Fabricated using IDT's CMOS high-performance technol-
ogy, these devices typically operate on only 250mW of
power. Low-power (L) versions offer battery backup data
retention capability, with each Dual-Port typically consum-
ing 200µW from a 2V battery.
The IDT71V321 devices are packaged in a 52-pin PLCC
and a 64-pin TQFP (thin plastic quad flatpack).
FUNCTIONAL BLOCK DIAGRAM
OEL
WCEL
R/ L
OER
WCER
R/ R
I/O0L- I/O7L
BUSYL(1,2)
A10L
A0L
NOTE:
1. BUSY and INT
are totem-pole
outputs.
I/O
Control
I/O
Control
Address
Decoder
CEL
OEL
WR/ L
11
MEMORY
ARRAY
ARBITRATION
and
INTERRUPT
LOGIC
Address
Decoder
11
CER
WOER
R/ R
(2)
INTL
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
©1996 Integrated Device Technology, Inc.
For latest information contact IDT’s web site at www.idt.com or fax-on-demand at 408-492-8391.
6.34
I/O0R-I/O7R
BUSYR(1,2)
A10R
A0R
(2)
INTR
3026 drw 01
OCTOBER 1996
DSC-3026/2
1

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