Philips Semiconductors Product specification
74F258A
Quad 2-line to 1-line selector/multiplexer, inverting
(3-State)
2
1996 Jan 05 853-0361 16192
FEATURES
• Multifunction capability
• Non-inverting data path
• 3-State outputs
• See 74F257A for non-inverting version
DESCRIPTION
The 74F258A has four identical 2-input multiplexers with 3-State
outputs which select 4 bits of data from two sources under control of
a common Select (S) input. The I
0n
inputs are selected when the
Select input is Low and the I
1n
inputs are selected when the Select
input is High. Data appears at the outputs in inverted form.
The 74F258A is the logical implementation of a 4-pole, 2-position
switch where the position of the switch is determined by the logic
level supplied to the Select input. Outputs are forced to a High
impedance ‘‘off” state when the Output Enable input (OE
) is High. All
but one device must be in the High impedance state to avoid
currents that would exceed the maximum ratings if outputs are tied
together. Design of the output signals must ensure that there is no
overlap when outputs of 3-State devices are tied together.
PIN CONFIGURATION
16
15
14
13
12
11
10
98
7
6
5
4
3
2
1
V
CC
I
0d
I
1d
Y
d
I
0c
I
1c
Y
c
S
I
0a
I
1a
Y
a
I
0b
I
1b
Y
b
GND
OE
SF00815
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL SUPPLY
CURRENT (TOTAL)
74F258A 3.5ns 14mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION COMMERCIAL RANGE
V
CC
= 5V ±10%,
T
amb
= 0°C to +70°C
PKG.
DWG. #
16-pin plastic DIP N74F258AN SOT38-4
16-pin plastic SO N74F258AD SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION
74F(U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
I
0n
, I
1n
Data inputs 1.0/1.0 20µA/0.6mA
S Common select input 1.0/1.0 20µA/0.6mA
OE Output Enable input (active Low) 1.0/1.0 20µA/0.6mA
Y
a
- Y
d
Data outputs 150/40 3.0mA/24mA
NOTE:
One (1.0) FAST Unit Load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
OE
I
0a
I
1a
I
0b
I
1b
I
0c
I
1c
I
0d
I
1d
15
2 3 5 6 11 10 14 13
47912
1S
Y
a
Y
b
Y
c
Y
d
V
CC
=Pin 16
GND=Pin 8
SF00816
LOGIC SYMBOL (IEEE/IEC)
EN
15
G1
4
7
9
12
2
5
10
13
1
MUX
SF00817
1
3
6
11
14
1
