Philips 74f539 DATASHEETS
Philips Semiconductors Product specification
74F539Dual 1-of-4 decoder (3-State)
DESCRIPTION
PIN CONFIGURA TION
The 74F539 contains two independent decoders. Each accepts two
address (A0 - A1) input signals and decodes them to select one of
four mutually exclusive outputs. A Polarity control (P) input
determines whether the outputs are active Low (P=H) or active High
(P=L). An active-Low Enable (E
) is available for data demultiplexing.
Data is routed to the selected output in non-inverted or inverted form
in the active-Low mode or inverted form in the active-High mode. A
High signal on the Output Enable (OE
n) input forces the 3-State
outputs to the high impedance state.
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL SUPPL Y
CURRENT
(TOTAL)
74F539 7.5ns 40mA
Q2b
1
Q1b
2
Q0b
3
Pb
4
OEb
5
A0a
6
A1a
7
Q3a
8
Q2a
9
10 11
GND
V
20
CC
Q3b
19
A1b
18
A0b
17
E
b
16
Ea
15
OE
a
14
Pa
13
12
Q0a
Q1a
ORDERING INFORMATION
DESCRIPTION COMMERCIAL RANGE
20-Pin Plastic DIP N74F539N
20-Pin Plastic SOL N74F539D
= 5V ±10%, T
V
CC
= 0°C to +70°C
amb
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION
74F(U.L.)
HIGH/LOW
A0a - A1a Decoder A Address inputs 1.0/1.0 20µA/0.6mA
A0b - A1b Decoder B Address inputs 1.0/1.0 20µA/0.6mA
Ea, Eb Enable inputs (active Low) 1.0/1.0 20µA/0.6mA
OEa, OEb Output Enable inputs (active Low) 1.0/1.0 20µA/0.6mA
Pa, Pb Polarity control inputs 1.0/1.0 20µA/0.6mA
Q0a–Q3a Decoder A Data outputs 150/40 3.0mA/24mA
Q0b–Q3b Decoder A 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.
LOAD VALUE
HIGH/LOW
SF01013
LOGIC SYMBOL
6717
13
15
14
4
16
5
VCC = Pin 20
GND = Pin 10
Pa
Ea
OEa
Pb
Eb
OEb
Q0a Q1a Q2a Q3a Q0b Q1b Q2b Q3b
A0a A1a A0b
12 11 9 8 3 2 1 19
1990 Feb 23 853–1274 98905
18
A1b
SF01014
LOGIC SYMBOL (IEEE/IEC)
4
5
17
18
16
13
14
6
7
15
1
DMUX
N4
EN
0
G
1
0,4
1,4
0
2,4
3
3,4
3
2
1
19
12
11
9
8
SF01015
Philips Semiconductors Product specification
OPERATING MODE
74F539Dual 1-of-4 decoder (3-State)
LOGIC DIAGRAM
7, 18
A1n
6, 17
A0n
15, 16
En
13, 4
Pn
14, 5
V
= Pin 20
CC
GND = Pin 10
OEn
12, 3 11, 2 9, 1 8, 19
Q0n Q1n Q2n Q3n
SF01016
FUNCTION TABLE
INPUTS OUTPUTS
OE
n
En A1n A0n Q0n Q1n Q2n Q3n
H X X X Z Z Z Z High Impedance
L H X X Qn=P Disable
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
H
L
L
L
L
H
H
H
L
H
L
L
H
L
H
H
L
L
H
L
H
H
L
H
L
L
Active High output
L
H
H
H
Active Low output
H
L
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
V
CC
V
IN
I
IN
V
OUT
I
OUT
T
amb
T
stg
Supply voltage –0.5 to +7.0 V
Input voltage –0.5 to +7.0 V
Input current –30 to +5 mA
Voltage applied to output in High output state –0.5 to +V
Current applied to output in Low output state 48 mA
Operating free-air temperature range 0 to +70 °C
Storage temperature –65 to +150 °C
PARAMETER RATING UNIT
(P = L)
(P = H)
CC
V
1990 Feb 23
2
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