IDT7208 Datasheet, PDF (1/12 Pages) Integrated Device Technology – CMOS ASYNCHRONOUS FIFO 65,536 x 9

Integrated Device Technology, Inc.
CMOS ASYNCHRONOUS FIFO
65,536 x 9
ADVANCED
INFORMATION
IDT7208
FEATURES:
• 65536 x 9 storage capacity
• High-speed: 15ns access time
• Low power consumption
— Active: 660mW (max.)
— Power-down: 44mW (max.)
• Asynchronous and simultaneous read and write
• Fully expandable in both word depth and width
• Pin and functionally compatible with IDT720x family
• Status Flags: Empty, Half-Full, Full
• Retransmit capability
• High-performance CMOS technology
• Industrial temperature range (-40^oC to +85^oC) is avail-
able, tested to military electrical specifications
DESCRIPTION:
The IDT7208 is a monolithic dual-port memory buffer with
internal pointers that load and empty data on a first-in/first-out
basis. The device uses Full and Empty flags to prevent data
overflow and underflow and expansion logic to allow for
unlimited expansion capability in both word size and depth.
Data is toggled in and out of the device through the use of
the Write (W) and Read (R) pins.
The device's 9-bit width provides a bit for a control or parity
at the user’s option. It also features a Retransmit (RT) capa-
bility that allows the read pointer to be reset to its initial position
when RT is pulsed LOW. A Half-Full Flag is available in the
single device and width expansion modes.
The IDT7208 is fabricated using IDT’s high-speed CMOS
technology. It is designed for applications requiring asynchro-
nous and simultaneous read/writes in multiprocessing, rate
buffering, and other applications.
FUNCTIONAL BLOCK DIAGRAM
W
WRITE
CONTROL
•
WRITE
POINTER
DATA INPUTS
(D0 –D 8)
RAM ARRAY
65,536 x 9
READ
POINTER
R
•
READ
CONTROL
THREE-
STATE
BUFFERS
•
•
FLAG
LOGIC
DATA OUTPUTS
(Q0 –Q 8)
•
•
EF
FF
•
RS
•
RESET
LOGIC
FL/RT
EXPANSION
XI
LOGIC
XO/HF
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGES
©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.
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