Philips N74F242D, N74F243D, N74F243N, N74F242N Datasheet
INTEGRATED CIRCUITS
74F242
Quad transceiver, inverting (3-State)
74F243
Quad transceiver (3-State)
Product specification
IC15 Data Handbook
1990 Aug 31
Philips Semiconductors Product specification
74F242/74F243T ransceivers
74F242 Quad Transceiver, Inverting (3-State)
74F243 Quad Transceiver (3-State)
PIN CONFIGURATION
OE
NC
GND
TYPICAL
1
A
2
3
A0
4
A1
5
A2
6
A3
14
13
12
11
10
9
87
SF00765
V
OE
NC
B0
B1
B2
B3
CC
B
TYPE
74F242 4.3ns 31.2mA
74F243 4.0ns 66mA
ORDERING INFORMATION
DESCRIPTION
14-pin plastic DIP N74F242N, N74F243N SOT27-1
PROPAGATION
DELAY
COMMERCIAL RANGE
VCC = 5V ±10%,
T
= 0°C to +70°C
amb
14-pin plastic SO N74F242D, N74F243D SOT108-1
TYPICAL
SUPPLY CURRENT
(TOTAL)
PKG DWG #
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
OE
A
B
Output enable input (active Low) 1.0/1.67 20µA/1.0mA
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
74F242
A1 A2
56
A3A0
B2 B3
98
SF00767
= Pin 14
V
CC
GND = Pin 7
1
13
= Pin 14
V
CC
GND = Pin 7
34
1
13
OE
OE
A
B
B0 B1
11 10
34
OE
A
OE
B
B0 B1
11 10
74F243
A1 A2
56
A3A0
B2 B3
98
SF00768
1990 Aug 30 853–0356 00285
2
Philips Semiconductors Product specification
74F242/74F243Transceivers
LOGIC SYMBOLS (IEEE/IEC)
74F242
1
13
EN1
EN2
1
13
74F243
EN1
EN2
OE
3
4
5
6
1
2
11
10
9
8
SF00769
74F242
1
A
3
A0
4
A1
5
A2
6
A3
11
B0
10
B1
9
B2
8
B3
3
4
5
6
1
2
11
10
9
8
SF00770
74F243
1
OE
A
3
A0
4
A1
5
A2
6
A3
11
B0
10
B1
9
B2
8
B3
13
VCC = Pin 14
GND = Pin 7
OE
B
SF00771
LOGIC DIAGRAMS
FUNCTION TABLE, 74F242
INPUTS OUTPUTS
OE
A
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
1990 Aug 30
OE
B
An Bn
OE
VCC = Pin 14
GND = Pin 7
B
FUNCTION TABLE, 74F243
INPUTS OUTPUTS
OE
A
L L INPUT B=A
H L Z Z
L H a a
H H A=B INPUT
3
OE
13
SF00772
B
An Bn
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