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SN74V273 데이터시트(PDF) 1 Page - Texas Instruments

부품명 SN74V273
상세설명  819218, 1638418, 3276818, 65536 횞 18 3.3-V CMOS FIRST-IN, FIRST-OUT MEMORIES
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홈페이지  http://www.ti.com
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SN74V263, SN74V273, SN74V283, SN74V293
8192
× 18, 16384 × 18, 32768 × 18, 65536 × 18
3.3-V CMOS FIRST-IN, FIRST-OUT MEMORIES
SCAS669D – JUNE 2001 – REVISED FEBRUARY 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Choice of Memory Organizations
– SN74V263 – 8192
× 18/16384 × 9
– SN74V273 – 16384
× 18/32768 × 9
– SN74V283 – 32768
× 18/65536 × 9
– SN74V293 – 65536
× 18/131072 × 9
D 166-MHz Operation
D 6-ns Read/Write Cycle Time
D User-Selectable Input and Output Port Bus
Sizing
×9 in to ×9 out
×9 in to ×18 out
×18 in to ×9 out
×18 in to ×18 out
D Big-Endian/Little-Endian User-Selectable
Byte Representation
D 5-V-Tolerant Inputs
D Fixed, Low First-Word Latency
D Zero-Latency Retransmit
D Master Reset Clears Entire FIFO
D Partial Reset Clears Data, but Retains
Programmable Settings
D Empty, Full, and Half-Full Flags Signal FIFO
Status
D Programmable Almost-Empty and
Almost-Full Flags; Each Flag Can Default to
One of Eight Preselected Offsets
D Selectable Synchronous/Asynchronous
Timing Modes for Almost-Empty and
Almost-Full Flags
D Program Programmable Flags by Either
Serial or Parallel Means
D Select Standard Timing (Using EF and FF
Flags) or First-Word Fall-Through (FWFT)
Timing (Using OR and IR Flags)
D Output Enable Puts Data Outputs in
High-Impedance State
D Easily Expandable in Depth and Width
D Independent Read and Write Clocks Permit
Reading and Writing Simultaneously
D High-Performance Submicron CMOS
Technology
D Glueless Interface With ’C6x DSPs
D Available in 80-Pin Thin Quad Flat Pack
(TQFP) and 100-Pin Ball Grid Array (BGA)
Packages
description
The SN74V263, SN74V273, SN74V283, and SN74V293 are exceptionally deep, high-speed, CMOS first-in
first-out (FIFO) memories with clocked read and write controls and a flexible bus-matching
×9/×18 data flow.
There is flexible
×9/×18 bus matching on both read and write ports.
The period required by the retransmit operation is fixed and short.
The first-word data-latency period, from the time the first word is written to an empty FIFO to the time it can be
read, is fixed and short.
These FIFOs are particularly appropriate for network, video, telecommunications, data communications, and
other applications that need to buffer large amounts of data and match buses of unequal sizes.
Each FIFO has a data input port (Dn) and a data output port (Qn), both of which can assume either an 18-bit
or 9-bit width, as determined by the state of external control pins’ input width (IW) and output width (OW) during
the master-reset cycle.
The input port is controlled by write-clock (WCLK) and write-enable (WEN) inputs. Data is written into the FIFO
on every rising edge of WCLK when WEN is asserted. The output port is controlled by read-clock (RCLK) and
read-enable (REN) inputs. Data is read from the FIFO on every rising edge of RCLK when REN is asserted.
An output-enable (OE) input is provided for 3-state control of the outputs.
Copyright
 2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.


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