SN74LVC245
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCAS218C – JANUARY 1993 – REVISED JULY 1994
•
•
•
•
EPIC ™ (Enhanced-Performance Implanted
CMOS) Submicron Process
Typical VOLP (Output Ground Bounce)
< 0.8 V at VCC = 3.3 V, TA = 25°C
Typical VOHV (Output VOH Undershoot)
> 2 V at VCC = 3.3 V, TA = 25°C
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
DB, DW, OR PW PACKAGE
(TOP VIEW)
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
description
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
OE
B1
B2
B3
B4
B5
B6
B7
B8
This octal bus transceiver is designed for 2.7-V to
3.6-V VCC operation.
The SN74LVC245 is designed for asynchronous communication between data buses. The device transmits
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 SN74LVC245 is characterized for operation from – 40°C to 85°C.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
logic symbol†
OE
DIR
A1
A2
A3
A4
A5
A6
A7
A8
19
1
2
3
logic diagram (positive logic)
G3
DIR
1
3EN1[BA]
3EN2[AB]
19
18
1
2
17
4
16
5
15
6
14
7
13
8
12
9
11
B1
A1
OE
2
B2
18
B3
B1
B4
B5
B6
B7
To Seven Other Channels
B8
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright © 1994, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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