74F641 Datasheet, PDF (2/10 Pages) NXP Semiconductors – Transceivers

Philips Semiconductors
Transceivers
Product specification
74F641/74F642*
74F641 Octal Bus Transceiver with Common Output Enable, Non-Inverting (Open Collector)
74F642 Octal Bus Transceiver with Common Output Enable, Inverting (Open Collector)
FEATURES
• 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
• —74F641, non-inverting
—74F642, inverting
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V_CC = 5V ±10%,
T_amb = 0°C to +70°C
20-pin plastic DIP
N74F641N
20-pin plastic SOL
N74F641D
PKG DWG #
SOT146-1
SOT163-1
TYPE
74F641
74F642
TYPICAL
PROPAGATION
DELAY
8.0ns
8.5ns
TYPICAL SUPPLY CURRENT
(TOTAL)
69mA
52mA
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F(U.L.)
HIGH/LOW
A0 - A7, B0 - B7
Data inputs
1.0/0.033
T/R
Transmit/Receive input
2.0/0.067
OE
Output Enable inputs
2.0/0.067
A0 - A7
Data outputs
OC/40
B0 - B7
Data outputs
OC/106.7
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.
LOAD VALUE
HIGH/LOW
20µA/20µA
40µA/40µA
40µA/40µA
OC/24mA
OC/64mA
PIN CONFIGURATION – 74F641
T/R ¹
A0 ²
A1 ³
A2 ⁴
A3 ⁵
A4 ⁶
A5 ⁷
A6 ⁸
A7 ⁹
GND ¹⁰
20 V_CC
19 _OE
18 _B0
17 _B1
16 _B2
15 _B3
14 _B4
13 _B5
12 _B6
11 _B7
SF00198
PIN CONFIGURATION – 74F642
T/R ¹
A0 ²
A1 ³
A2 ⁴
A3 ⁵
A4 ⁶
A5 ⁷
A6 ⁸
A7 ⁹
GND ¹⁰
20 V_CC
19 _OE
18 _B0
17 _B1
16 _B2
15 _B3
14 _B4
13 _B5
12 _B6
11 _B7
SF00198
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08
2
853–0382 20616