Philips 74f641 DATASHEETS
INTEGRATED CIRCUITS
74F641
Octal bus transceiver with
common output enable,
non-inverting (open collector)
Product specification
Supersedes data of 1999 Jan 08
IC15 Data Handbook
2000 Jun 30
Philips Semiconductors Product specification
Octal bus transceiver with common output enable,
non-inverting (open-collector)
FEA TURES
•High-impedance NPN base inputs for reduced loading
(20µA in High and Low states)
•Octal bidirectional bus interface
•Common Output Enable for both Transmit and Receive modes
•Open collector outputs sink 64mA
•Non-inverting
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION
A0 - A7, B0 - B7 Data inputs 1.0/0.033 20µA/20µA
T/R Transmit/Receive input 2.0/0.067 40µA/40µA
OE Output Enable inputs 2.0/0.067 40µA/40µA
A0 - A7 Data outputs OC/40 OC/24mA
B0 - B7 Data outputs OC/106.7 OC/64mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state. OC = Open Collector.
ORDERING INFORMATION
COMMERCIAL RANGE
DESCRIPTION
20-pin plastic DIP N74F641N SOT146-1
20-pin plastic SOL N74F641D SOT163-1
TYPICAL
TYPE
PROPAGATION
DELA Y
74F641 8.0ns 69mA
VCC = 5V ±10%,
T
= 0°C to +70°C
amb
TYPICAL SUPPL Y CURRENT
74F(U.L.)
HIGH/LOW
74F641
PKG DWG #
(TOTAL)
LOAD VALUE
HIGH/LOW
PIN CONFIGURATION
1
T/R
2
A0
3
A1
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10 11
GND
20
19
18
17
16
15
14
13
12
SF00198
V
OE
B0
B1
B2
B3
B4
B5
B6
B7
LOGIC SYMBOL
CC
1
19
VCC= Pin 20
GND = Pin 10
23
A0 A1
T/R
OE
B0 B1 B2 B3
18 17 16 15 14 13 12 11
456
A2 A3
A4 A5 A67A7
B4 B5 B6 B7
89
SF01154
2000 Jun 30 853–0382 24025
2
Philips Semiconductors Product specification
Octal bus transceiver with common output enable,
non-inverting (open-collector)
LOGIC SYMBOL (IEEE/IEC)
19
1
G3
3EN1
3EN2
2
3
4
5
6
7
8
9
1
18
2
17
16
15
14
13
12
11
FUNCTION TABLE
OE T/R An Bn
H = High voltage level
L = Low voltage level
X = Don’t care
OFF= High if pull-up resistor is connected to open collector output
74F641
INPUTS INPUTS/OUTPUTS
L L A=B INPUTS
H H INPUTS B=A
H X OFF OFF
LOGIC DIAGRAM
1
T/R
19
OE
A0
A1
A2
A3
A4
A5
A6
SF01147
2
3
4
5
6
7
8
18
B0
17
B1
16
B2
15
B3
14
B4
13
B5
12
B6
VCC= Pin 20
GND = Pin 10
2000 Jun 30
9
A7
11
SF01149
B7
3
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