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74ACT16254DGGR 数据表(PDF) 1 Page - Texas Instruments

部件名 74ACT16254DGGR
功能描述  16-BIT ADDRESS/DATA MULTIPLEXER WITH 3-STATE OUTPUTS
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

74ACT16254DGGR 数据表(HTML) 1 Page - Texas Instruments

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74ACT16254
16-BIT ADDRESS/DATA MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS527A – AUGUST 1995 – NOVEMBER 1995
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Member of the Texas Instruments
Widebus
™ Family
D Latch-Up Performance Exceeds 500 mA
Per JEDEC Standard JESD-17
D Bus-Hold Inputs Eliminate the Need for
External Pullup Resistors
D Typical VOLP (Output Ground Bounce)
< 0.8 V at VCC = 5 V, TA = 25°C
D Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise
D Packaged in Plastic Thin Shrink
Small-Outline (DGG) Package
description
The 74ACT16254 is a dual 16-bit, noninverting
bus-interface device. The A and C ports perform
a transceiver function, like that of the 74ACT245.
The B and C ports perform the buffer/driver
function of the 74ACT244. The A and C port
outputs are designed to sink up to 12 mA.
The 74ACT16254 is designed for asynchronous
communication between data buses. The control
function implementation minimizes external
timing requirements.
Data transmission from the A port to the C port,
C port to A port, or B port to C port is accomplished
by setting the appropriate logic levels on the bus
enable (EN1 and EN2) inputs.
All outputs are disabled when logic highs are
placed on both EN1 and EN2; the buses are
effectively isolated.
The 74ACT16254 is packaged in TI’s thin shrink
small-outline package (DGG), which provides
twice the I/O pin count and functionality of
standard small-outline packages in the same
printed-circuit-board area.
Active bus-hold circuitry is provided to hold unused or floating data and I/O pins at a valid logic level.
The 74ACT16254 is characterized for operation from – 40
°C to 85°C.
Copyright
© 1995, 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.
Widebus is a trademark of Texas Instruments Incorporated.
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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B1
B3
B6
B7
B9
GND
B11
B13
B15
VCC
A16
A15
A14
GND
A13
A12
A11
A10
GND
A9
A8
A7
VCC
A6
A5
A4
GND
A3
A2
A1
EN2
EN1
B2
B4
B6
B8
B10
GND
B12
B14
B16
VCC
C16
C15
C14
GND
C13
C12
C11
C10
GND
C9
C8
C7
VCC
C6
C5
C4
GND
C3
C2
C1
NC
NC
DGG PACKAGE
(TOP VIEW)
NC – No internal connection


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