SN64BCT245 Datasheet, PDF (1/5 Pages) Texas Instruments – OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS

SN64BCT245
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCBS040A – JANUARY 1990 – REVISED JANUARY 1994
• BiCMOS Design Significantly Reduces I_CCZ
• 3-State True Outputs Drive Bus Lines
Directly
• High-Impedance State During Power Up
and Power Down
• ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
• Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (N)
description
DW 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
This octal bus transceiver 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 can be used to disable the device
so the buses are effectively isolated.
The outputs are in a high-impedance state during power up and power down while the supply voltage is less
than approximately 3 V.
The SN64BCT245 is characterized for operation from – 40°C to 85°C and 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
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 © 1994, Texas Instruments Incorporated
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