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IDT72115L50TP Datasheet

  • IDT72115L50TP

  • CMOS PARALLEL-TO-SERIAL FIFO 256 x 16, 512 x 16, 1024 x 16

  • 12頁(yè)

  • IDT

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CMOS PARALLEL-TO-SERIAL FIFO
256 x 16, 512 x 16, 1024 x 16
Integrated Device Technology, Inc.
IDT72105
IDT72115
IDT72125
FEATURES:
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25ns parallel port access time, 35ns cycle time
45MHz serial output shift rate
Wide x16 organization offering easy expansion
Low power consumption (50mA typical)
Least/Most Significant Bit first read selected by asserting
the FL/DIR pin
Four memory status flags: Empty, Full, Half-Full, and
Almost-Empty/Almost-Full
Dual-Port zero fall-through architecture
Available in 28-pin 300 mil plastic DIP and 28-pin SOIC
Industrial temperature range (-40oC to +85oC) is avail-
able, tested to military electrical specifications
DESCRIPTION:
The IDT72105/72115/72125s are very high-speed, low-
power,dedicated, parallel-to-serial FIFOs. These FIFOs
possess a 16-bit parallel input port and a serial output port with
256, 512 and 1K word depths, respectively.
The ability to buffer wide word widths (x16) make these
FIFOs ideal for laser printers, FAX machines, local area
networks (LANs), video storage and disk/tape controller
applications.
Expansion in width and depth can be achieved using
multiple chips. IDT鈥檚 unique serial expansion logic makes this
possible using a minimum of pins.
The unique serial output port is driven by one data pin (SO)
and one clock pin (SOCP). The Least Significant or Most
Significant Bit can be read first by programming the DIR pin
after a reset.
Monitoring the FIFO is eased by the availability of four
status flags: Empty, Full, Half-Full and Almost-Empty/Almost-
Full. The Full and Empty flags prevent any FIFO data overflow
or underflow conditions. The Half-Full Flag is available in both
single and expansion mode configurations. The Almost-Empty/
Almost-Full Flag is available only in a single device mode.
The IDT72105/15/25 are fabricated using IDT鈥檚 leading
edge, submicron CMOS technology. Military grade product is
manufactured in compliance with the latest revision of Mil-
STD-883, Class B.
FUNCTIONAL BLOCK DIAGRAM
RS
W
D
0鈥?5
16
RESET
LOGIC
WRITE
POINTER
RAM
ARRAY
256 x 16
512 x 16
1024 x 16
READ
POINTER
RSIX
RSOX
FL/DIR
SERIAL OUTPUT
LOGIC
EXPANSION
LOGIC
FLAG
LOGIC
FF
EF
HF
AEF
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
SOCP
SO
2665 drw 01
COMMERCIAL TEMPERATURE RANGE
漏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.
DECEMBER 1996
DSC-2665/6
5.35
1

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