74act16245sscx-nl Fairchild Semiconductor, 74act16245sscx-nl Datasheet - Page 2

• Manufacturer Part Number: 74act16245sscx-nl
• Description: 74act16245 16-bit Transceiver With 3-state Outputs
• Manufacturer: Fairchild Semiconductor

www.fairchildsemi.com
Functional Description
The ACT16245 contains sixteen non-inverting bidirectional
buffers with 3-STATE outputs. The device is byte controlled
with each byte functioning identically, but independent 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,
Truth Tables
H
L
X
Z
Logic Diagram
LOW Voltage Level
High Impedance
HIGH Voltage Level
Immaterial
OE
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
2
15
15
Bus B data is transmitted to Bus A. The 3-STATE outputs
are controlled by an Output Enable (OE
byte. When OE
When OE
mode, but this does not interfere with entering new data
into the inputs.
7
7
Data to Bus A
Data to Bus B
Data to Bus A
Data to Bus B
Outputs
Outputs
8
–A
n
0
–A
is HIGH, the outputs are in the high impedance
15
7
, B
, B
n
8
8
0
0
–A
–B
8
–A
–B
0
is LOW, the outputs are in 2-state mode.
–B
–B
15
15
7
7
15
7
n
) input for each