74AC399PC Fairchild Semiconductor, 74AC399PC Datasheet - Page 2

• Manufacturer Part Number: 74AC399PC
• Description: IC REGISTER QUAD 2PORT 16DIP
• Manufacturer: Fairchild Semiconductor
• Series: 74ACr
• Type: Multiplexerr

Specifications of 74AC399PC

• Circuit: 4 x 2:1
• Independent Circuits: 1
• Current - Output High, Low: 24mA, 24mA
• Voltage Supply Source: Single Supply
• Voltage - Supply: 2 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Functional Description
The AC/ACT399 is a high-speed quad 2-port register. It
selects four bits of data from either of two sources (Ports)
under control of a common Select input (S). The selected
data is transferred to a 4-bit output register synchronous
with the LOW-to-HIGH transition of the Clock input (CP).
The 4-bit D-type output register is fully edge-triggered. The
Data inputs (I
only a setup time prior to and hold time after the LOW-to-
HIGH transition of the Clock input for predictable operation.
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
0x
, I
1x
) and Select input (S) must be stable
2
Function Table
H
L

X
LOW Voltage Level
HIGH Voltage Level
Immaterial
S
H
H
LOW-to-HIGH Clock Transition
L
L
I
H
L
X
X
0
Inputs
I
H
X
X
L
1
CP




Q
L
H
L
H
Outputs
Q
H
H
L
L