N74F242D
74F242
Quad transceiver, inverting (3-State)
74F243
Quad transceiver (3-State)
Product specification
IC15 Data Handbook
1990 Aug 31
INTEGRATED CIRCUITS
Philips Semiconductors Product specification
74F242/74F243T ransceivers
74F242 Quad Transceiver, Inverting (3-State)
74F243 Quad Transceiver (3-State)
2
1990 Aug 30 853–0356 00285
PIN CONFIGURATION
14
13
12
11
10
9
87
6
5
4
3
2
1
GND
V
CC
B1
B2
B3
B0
OE
B
NC
OE
A
NC
A3
A0
A1
A2
SF00765
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F242 4.3ns 31.2mA
74F243 4.0ns 66mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V ±10%,
T
amb
= 0°C to +70°C
PKG DWG #
14-pin plastic DIP N74F242N, N74F243N SOT27-1
14-pin plastic SO N74F242D, N74F243D SOT108-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW
An, Bn Data inputs (74F242) 3.5/1.67 70µA/1.0mA
An, Bn Data inputs (74F243) 3.5/2.67 70µA/1.6mA
OE
A
Output enable input (active Low) 1.0/1.67 20µA/1.0mA
OE
B
Output enable input 1.0/1.67 20µA/1.0mA
An, Bn Data outputs 750/106.7 15mA/64mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOGIC SYMBOLS
B0 B1
B2 B3
11 10
98
V
CC
= Pin 14
GND = Pin 7
1
13
A1 A2
56
SF00767
A3A0
34
OE
A
OE
B
74F242
B0 B1
B2 B3
11 10
98
V
CC
= Pin 14
GND = Pin 7
1
13
A1 A2
56
SF00768
A3A0
34
OE
A
OE
B
74F243
Philips Semiconductors Product specification
74F242/74F243Transceivers
1990 Aug 30
3
LOGIC SYMBOLS (IEEE/IEC)
SF00769
3
4
1
EN1
13
EN2
5
6
11
10
9
8
74F242
1
2
SF00771
V
CC
= Pin 14
GND = Pin 7
74F242
11
OE
A
10
A0
9
A1
8
A2
A3
B0
B1
B2
B3
1
3
4
5
6
13
OE
B
SF00770
3
4
1
EN1
13
EN2
5
6
11
10
9
8
74F243
1
2
11
OE
A
10
A0
9
A1
8
A2
A3
B0
B1
B2
B3
1
3
4
5
6
13
OE
B
74F243
SF00772
V
CC
= Pin 14
GND = Pin 7
LOGIC DIAGRAMS
FUNCTION TABLE, 74F242
INPUTS OUTPUTS
OE
A
OE
B
An Bn
L L INPUT B=A
H L Z Z
L H a a
H H A=B INPUT
H = High voltage level
L = Low voltage level
Z = High impedance “off” state
a = This condition is not allowed due to excessive currents
FUNCTION TABLE, 74F243
INPUTS OUTPUTS
OE
A
OE
B
An Bn
L L INPUT B=A
H L Z Z
L H a a
H H A=B INPUT
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