IDT72125_16 Datasheet, PDF (1/11 Pages) Integrated Device Technology – CMOS PARALLEL-TO-SERIAL FIFO

CMOS PARALLEL-TO-SERIAL FIFO
1,024 x 16
IDT72125
FEATURES:
• 25ns parallel port access time, 35ns cycle time
• 50MHz serial shift frequency
• 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
• Green parts available, see ordering information
DESCRIPTION:
The IDT72125 is a high-speed, low- power, dedicated, parallel-to-serial
FIFO. This FIFO features a 16-bit parallel input port and a serial output port with
1,024 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’s
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 IDT72125 is fabricated using submicron CMOS technology.
FUNCTIONAL BLOCK DIAGRAM
RS
W
D0-15
16
RESET
LOGIC
WRITE
POINTER
RAM
ARRAY
1,024 x 16
READ
POINTER
RSIX
RSOX
FL/DIR
EXPANSION
LOGIC
SERIAL OUTPUT
LOGIC
SOCP
SO
FF
FLAG
EF
LOGIC
HF
AEF
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IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
1
© 2016 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
FEBRUARY 2016
DSC-2665/1