54ACTQ16245FMQR National Semiconductor, 54ACTQ16245FMQR Datasheet - Page 2

• Manufacturer Part Number: 54ACTQ16245FMQR
• Manufacturer: National Semiconductor

Specifications of 54ACTQ16245FMQR

• Logic Family: ACTQ
• Operating Supply Voltage (typ): 5V
• Propagation Delay Time: 13ns
• Number Of Elements: 2
• Number Of Channels: 16
• Input Logic Level: TTL
• Output Logic Level: CMOS
• Output Type: 3-State
• Package Type: CPAK
• Polarity: Non-Inverting
• Logical Function: Bus Transceiver
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Technology: CMOS
• Operating Temp Range: -55C to 125C
• Operating Temperature Classification: Military
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / RoHS Status: Not Compliant

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Functional Description
The ’ACTQ16245 contains sixteen non-inverting bidirec-
tional buffers with TRI-STATE outputs. The device is byte
controlled with each byte functioning identically, but indepen-
dent 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
Truth Tables
Logic Diagram
H = High Voltage Level
L = Low Voltage Level
X = Immaterial
Z = High Impedance
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
2
–B
–A
15
15
7
7
is transmitted to Bus B. When the T/R input is LOW, Bus B
data is transmitted to Bus A. The TRI-STATE outputs are
controlled by an Output Enable (OE
When OE
OE
but this does not interfere with entering new data into the
inputs.
Data to Bus A
Data to Bus B
Data to Bus A
Data to Bus B
Outputs
Outputs
n
is HIGH, the outputs are in the high impedance mode,
8
–A
0
–A
n
15
is LOW, the outputs are in 2-state mode. When
7
, B
, B
8
8
0
0
–A
–B
8
–A
–B
0
–B
–B
15
15
7
7
15
7
DS010926-3
n
) input for each byte.