SN74ABTH25245DWR Datasheet, PDF (1/10 Pages) Texas Instruments – 25-W OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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 V_OLP (Output Ground Bounce) < 1 V
at V_CC = 5 V, T_A = 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 V_CC 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.
SN54ABTH25245, SN74ABTH25245
25-Ω OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS251F – JUNE 1992 – REVISED MAY 1997
SN54ABTH25245 . . . JT PACKAGE
SN74ABTH25245 . . . DW OR NT PACKAGE
(TOP VIEW)
A1 1
GND 2
A2 3
A3 4
GND 5
A4 6
A5 7
GND 8
A6 9
A7 10
GND 11
A8 12
24 DIR
23 B1
22 B2
21 V_CC
20 B3
19 B4
18 B5
17 B6
16 V_CC
15 B7
14 B8
13 OE
SN54ABTH25245 . . . FK PACKAGE
(TOP VIEW)
B3
V_CC
B2
NC
B1
DIR
A1
4 3 2 1 28 27 26
5
25
6
24
7
23
8
22
9
21
10
20
11
19
12 13 14 15 16 17 18
OE
A8
GND
NC
A7
A6
GND
NC – No internal connection
These transceivers are capable of sinking 188 mA of I_OL current, which facilitates switching 25-Ω transmission
lines on the incident wave. The distributed V_CC 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.
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.
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.
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Copyright © 1997, Texas Instruments Incorporated
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