74ACT399SCX Fairchild Semiconductor, 74ACT399SCX Datasheet - Page 2
![IC REGISTER QUAD 2PORT 16SOIC](/photos/5/45/54533/261-16-soic_sml.jpg)
74ACT399SCX
Manufacturer Part Number
74ACT399SCX
Description
IC REGISTER QUAD 2PORT 16SOIC
Manufacturer
Fairchild Semiconductor
Series
74ACTr
Type
Multiplexerr
Datasheet
1.74ACT399MTCX.pdf
(9 pages)
Specifications of 74ACT399SCX
Circuit
4 x 2:1
Independent Circuits
1
Current - Output High, Low
24mA, 24mA
Voltage Supply Source
Single Supply
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
www.fairchildsemi.com
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