SN74F2245 Datasheet, PDF (1/5 Pages) Texas Instruments – 25-ohm OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS

SN74F2245
25-Ω OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SDFS099 – MAY 1995
D 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
D Package Options Include Plastic
Small-Outline (DB) Packages and Plastic
300-mil DIPs (N)
description
The SN74F2245 is designed for asynchronous
communication between data buses. The devices
transmit data from the A bus to the B bus or from
the B bus to the A bus depending upon the logic
level at the direction-control (DIR) input. The
output-enable (OE) input disables the device so
the buses are effectively isolated.
DB OR N PACKAGE
(TOP VIEW)
DIR ₁
A1 ₂
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 ^V_CC
19 ^OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
Both A and B outputs can sink up to 12 mA; 25-Ω resistors are included in the lower output circuit to reduce
overshoot and undershoot.
The SN74F2245 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OE DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
logic symbol^†
logic diagram (positive logic)
19
OE
1
DIR
G3
3EN1[BA]
3EN2[AB]
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
1
2
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
B8
† _{This symbol is in accordance with ANSI/IEEE Std 91-1984 and}
IEC Publication 617-12.
DIR ¹
2
A1
19
OE
18 _B1
To Seven Other Channels
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
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Copyright © 1995, Texas Instruments Incorporated
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