74F399PC

© 2004 Fairchild Semiconductor Corporation DS009533 www.fairchildsemi.com
April 1988
Revised January 2004
74F399 Quad 2-Port Register
74F399
Quad 2-Port Register
General Description
The 74F399 is the logical equivalent of a quad 2-input mul-
tiplexer feeding into four edge-triggered flip-flops. A com-
mon Select input determines which of the two 4-bit words is
accepted. The selected data enters the flip-flops on the ris-
ing edge of the clock.
Features
Select inputs from two data sources
Fully positive edge-triggered operation
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols Connection Diagram
Unit Loading/Fan Out
Order Number Package Number Package Description
74F399SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
74F399SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F399PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Pin Names Description
U.L.
Input I
IH
/I
IL
HIGH/LOW
Output I
OH
/I
OL
S Common Select Input 1.0/1.0 20 µA/0.6 mA
CP Clock Pulse Input (Active Rising Edge) 1.0/1.0 20
µA/0.6 mA
I
0a
I
0d
Data Inputs from Source 0 1.0/1.0 20 µA/0.6 mA
I
1a
I
1d
Data Inputs from Source 1 1.0/1.0 20 µA/0.6 mA
Q
a
Q
d
Register True Outputs 50/33.3 1 mA/20 mA
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74F399
Functional Description
The 74F399 is a high-speed quad 2-port registers. They
select 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
0x
, I
1x
) and Select input (S) must be stable
only a setup time prior to and hold time after the LOW-to-
HIGH transition of the Clock input for predictable operation.
Function Table
H = HIGH Voltage Level
L = LOW Voltage Level
h = HIGH Voltage Level one setup time prior to the LOW-to-HIGH
clock transition
I = LOW Voltage Level one setup time prior to the LOW-to-HIGH
clock transition
X = Immaterial
Logic Diagram
*F398 Only
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Inputs Outputs
SI
0
I
1
Q
IIXL
IhXH
hX I L
hX hH
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74F399
Absolute Maximum Ratings(Note 1) Recommended Operating
Conditions
Note 1: Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Storage Temperature 65°C to +150°C
Ambient Temperature under Bias
55°C to +125°C
Junction Temperature under Bias
55°C to +150°C
V
CC
Pin Potential to Ground Pin 0.5V to +7.0V
Input Voltage (Note 2)
0.5V to +7.0V
Input Current (Note 2)
30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with V
CC
= 0V)
Standard Output
0.5V to V
CC
3-STATE Output 0.5V to +5.5V
Current Applied to Output
in LOW State (Max) twice the rated I
OL
(mA)
ESD Last Passing Voltage
(Min)74F399 4000V
Free Air Ambient Temperature 0
°C to +70°C
Supply Voltage
+4.5V to +5.5V
Symbol Parameter Min Typ Max Units
V
CC
Conditions
V
IH
Input HIGH Voltage 2.0 V Recognized as a HIGH Signal
V
IL
Input LOW Voltage 0.8 V Recognized as a LOW Signal
V
CD
Input Clamp Diode Voltage 1.2 V Min I
IN
= 18 mA
V
OH
Output HIGH 10% V
CC
2.5
VMin
I
OH
= 1 mA
Voltage 5% V
CC
2.7 I
OH
= 1 mA
V
OL
Output LOW 10% V
CC
0.5 V Min I
OL
= 20 mA
Voltage
I
IH
Input HIGH Current 5.0 µAMaxV
IN
= 2.7V
I
BVI
Input HIGH Current
7.0 µAMaxV
IN
= 7.0V
Breakdown Test
I
CEX
Output HIGH
50 µAMaxV
OUT
= V
CC
Leakage Current
V
ID
Input Leakage
4.75 V 0.0
I
ID
= 1.9 µA
Tes t All Other Pins Grounded
I
OD
Output Leakage
3.75 µA0.0
V
IOD
= 150 mV
Circuit Current All Other Pins Grounded
I
IL
Input LOW Current 0.6 mA Max V
IN
= 0.5V
I
OS
Output Short-Circuit Current 60 150 mA Max V
OUT
= 0V
I
CCH
Power Supply Current 22 34 mA Max V
O
= HIGH
I
CCL
Power Supply Current 22 34 mA Max V
O
= LOW

74F399PC

Mfr. #:
Manufacturer:
ON Semiconductor / Fairchild
Description:
Encoders, Decoders, Multiplexers & Demultiplexers Quad 2-Port Register
Lifecycle:
New from this manufacturer.
Delivery:
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