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SN74ABTH25245DW 数据表(PDF) 1 Page - Texas Instruments

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部件名 SN74ABTH25245DW
功能描述  25-W OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
Download  8 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

SN74ABTH25245DW 数据表(HTML) 1 Page - Texas Instruments

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SN54ABTH25245, SN74ABTH25245
25-
Ω OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS251F – JUNE 1992 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design
Significantly Reduces Power Dissipation
D ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
D Typical VOLP (Output Ground Bounce) < 1 V
at VCC = 5 V, TA = 25°C
D High-Impedance State During Power Up
and Power Down
D Designed to Facilitate Incident-Wave
Switching for Line Impedances of 25
Ω or
Greater
D Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise
D Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D Package Options Include Plastic
Small-Outline (DW) Package, Ceramic Chip
Carriers (FK), and Standard Plastic (NT)
and Ceramic (JT) DIPs
description
The ’ABTH25245 are 25-
Ω octal bus transceivers
designed
for
asynchronous
communication
between data buses. They improve both the
performance and density of 3-state memory
address drivers, clock drivers, and bus-oriented
transceivers.
These
devices
allow
noninverted
data
transmission from the A bus to the B bus or from
the B bus to the A bus, depending on the logic level
at
the
direction-control
(DIR)
input.
The
output-enable (OE) input can disable the device
so that both buses are effectively isolated. When
OE is low, the device is active.
These transceivers are capable of sinking 188 mA of IOL current, which facilitates switching 25-Ω transmission
lines on the incident wave. The distributed VCC and GND pins minimize switching noise for more-reliable system
operation.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
Copyright
© 1997, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
EPIC-
ΙΙB is a trademark of Texas Instruments Incorporated.
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12
24
23
22
21
20
19
18
17
16
15
14
13
A1
GND
A2
A3
GND
A4
A5
GND
A6
A7
GND
A8
DIR
B1
B2
VCC
B3
B4
B5
B6
VCC
B7
B8
OE
SN54ABTH25245 . . . JT PACKAGE
SN74ABTH25245 . . . DW OR NT PACKAGE
(TOP VIEW)
32 1 28 27
12 13
5
6
7
8
9
10
11
25
24
23
22
21
20
19
OE
A8
GND
NC
A7
A6
GND
B3
VCC
B2
NC
B1
DIR
A1
426
14 15 16 17 18
SN54ABTH25245 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection


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