74F399 Philips, 74F399 Datasheet - Page 2

• Manufacturer Part Number: 74F399
• Description: Registers
• Manufacturer: Philips

Philips Semiconductors
FEATURES
DESCRIPTION
The 74F398 and 74F399 are the logical equivalent of a quad 2-input
multiplexer feeding into four edge-triggered flip-flops. A common
Select input determines which of two 4-bit words is accepted. The
selected data enters the flip-flops on the rising edge of the clock.
The 74F399 is the 16-pin version of the 74F398, with only the true
(Qn) outputs of the flip-flops available.
The 74F398 and 74F399 are high speed quad 2-port registers. They
select 4 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 (I0n, I1n) 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.
The 74F398 has both Q and Q outputs.
ORDERING INFORMATION
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
NOTE:
One (1.0) FAST unit load is defined as: 20 A in the High state and 0.6mA in the Low state.
* Discontinued part. Please see the Discontinued Products List..
16-pin plastic DIP
1999 Jan 08
16-pin plastic SO
I0a, I0b, I0c, I0d
I1a, I1b, I1c, I1d
Select inputs from two data sources
Fully positive edge-triggered
Both True and Complementary outputs–74F398
DESCRIPTION
Qa, Qb, Qc, Qd
Qa, Qb, Qc, Qd
Registers
74F398 Quad 2-Port Register with True and Complementary Outputs
74F399 Quad 2-Port Register
74F398
74F399
TYPE
PINS
CP
S
TYPICAL f
120MHz
120MHz
Data inputs from source 0
Data inputs from source 1
Common Select input
Clock input (active rising edge)
Register true outputs
Register complementary outputs (74F398)
COMMERCIAL RANGE
T
amb
V
MAX
CC
N74F399N
N74F399D
= 0 C to +70 C
= 5V 10%,
TYPICAL SUPPLY CURRENT
(TOTAL)
DESCRIPTION
25mA
22mA
PKG DWG #
SOT109-1
SOT38-4
2
PIN CONFIGURATION – 74F398
PIN CONFIGURATION – 74F399
GND
GND
HIGH/LOW
I1a
I1b
I0b
I1a
I1b
I0b
74F (U.L.)
Qa
Qa
I0a
Qb
Qb
Qa
I0a
Qb
S
S
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
50/33
50/33
10
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
74F398*,74F399
SF00951
SF00947
20
19
18
17
16
15
14
13
12
16
15
14
13
12
10
11
11
9
V
Qd
Qd
I0d
I1d
I1c
I0c
Qc
Qc
CP
V
Qd
I0d
I1d
I1c
I0c
Qc
CP
Product specification
LOAD VALUE
CC
CC
1.0mA/20mA
1.0mA/20mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
HIGH/LOW
853–0028 20616