74ACTQ16245 Fairchild Semiconductor, 74ACTQ16245 Datasheet - Page 2

• Manufacturer Part Number: 74ACTQ16245
• Description: 16-Bit Transceiver with 3-STATE Outputs
• Manufacturer: Fairchild Semiconductor

www.fairchildsemi.com
Functional Description
The ACTQ16245 contains sixteen non-inverting bidirec-
tional buffers with 3-STATE outputs. The device is byte
controlled with each byte functioning identically, but inde-
pendent of the other. The control pins can be shorted
together to obtain full 16-bit operation. The following
description applies to each byte. When the T/R input is
HIGH, then Bus A data is transmitted to Bus B. When the
T/R input is LOW, Bus B data is transmitted to Bus A. The
3-STATE outputs are controlled by an Output Enable (OE
input for each byte. When OE
2-state mode. When OE
high impedance mode, but this does not interfere with
entering new data into the inputs.
Logic Diagram
n
is HIGH, the outputs are in the
n
is LOW, the outputs are in
n
)
2
Truth Tables
H
L
X
Z
LOW Voltage Level
High Impedance
OE
HIGH Voltage Level
Immaterial
OE
H
L
L
H
L
L
2
1
Inputs
Inputs
T/R
T/R
H
X
L
H
X
L
2
1
Bus B
Bus A
HIGH-Z State on A
Bus B
Bus A
HIGH-Z State on A
8
8
–B
–A
0
0
–B
–A
15
15
7
7
Data to Bus A
Data to Bus B
Data to Bus A
Data to Bus B
Outputs
Outputs
8
–A
0
–A
15
7
, B
, B
8
8
0
0
–A
–B
8
–A
–B
0
–B
–B
15
15
7
7
15
7