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National Semiconductor Electronic Components Datasheet

74F545 Datasheet

Octal Bidirectional Transceiver with TRI-STATEE Outputs

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May 1995
54F 74F545 Octal Bidirectional
Transceiver with TRI-STATE Outputs
General Description
The ’F545 is an 8-bit TRI-STATE high-speed transceiver It
provides bidirectional drive for bus-oriented microprocessor
and digital communications systems Straight through bidi-
rectional transceivers are featured with 24 mA (20 mA Mil)
bus drive capability on the A ports and 64 mA (48 mA Mil)
bus drive capability on the B ports
One input Transmit Receive (T R) determines the direction
of logic signals through the bidirectional transceiver Trans-
mit enables data from A ports to B ports Receive enables
data from B ports to A ports The Output Enable input dis-
ables both A and B ports by placing them in a TRI-STATE
condition
Features
Y Higher drive than 8304
Y 8-bit bidirectional data flow reduces system package
count
Y TRI-STATE inputs outputs for interfacing with bus-ori-
ented systems
Y 24 mA (20 mA Mil) and 64 mA (48 mA Mil) bus drive
capability on A and B ports respectively
Y Transmit Receive and Output Enable simplify control
logic
Y Guaranteed 4000V minimum ESD protection
Y Pin for Pin compatible with Intel 8286
Commercial
74F545PC
74F545SC (Note 1)
74F545SJ (Note 1)
Military
54F545DM (Note 2)
54F545FM (Note 2)
54F545LM (Note 2)
Package
Number
N20A
J20A
M20B
M20D
W20A
E20A
Package Description
20-Lead (0 300 Wide) Molded Dual-In-Line
20-Lead Ceramic Dual-In-Line
20-Lead (0 300 Wide) Molded Small Outline JEDEC
20-Lead (0 300 Wide) Molded Small Outline EIAJ
20-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1 Devices also available in 13 reel Use suffix e SCX and SJX
Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Logic Symbols
IEEE IEC
TL F 9556 – 3
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9556
TL F 9556 – 5
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

74F545 Datasheet

Octal Bidirectional Transceiver with TRI-STATEE Outputs

No Preview Available !

Connection Diagrams
Pin Assignment for
DIP SOIC and Flatpak
Pin Assignment
for LCC
Truth Table
Inputs
OE T R
Outputs
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X High Z
TL F 9556–1
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Z e High Impedance
Unit Loading Fan Out
Pin Names
OE
TR
A0 – A7
B0 – B7
Description
Output Enable Input (Active LOW)
Transmit Receive Input
Side A TRI-STATE Inputs or
TRI-STATE Outputs
Side B TRI-STATE Inputs or
TRI-STATE Outputs
54F 74F
UL
HIGH LOW
10 20
10 20
3 5 1 083
150 40 (33 3)
3 5 1 083
600 106 6 (80)
Input IIH IIL
Output IOH IOL
20 mA b1 2 mA
20 mA b1 2 mA
70 mA b650 mA
b3 mA 24 mA (20 mA)
70 mA b650 mA
b12 mA 64 mA (48 mA)
TL F 9556 – 2
2


Part Number 74F545
Description Octal Bidirectional Transceiver with TRI-STATEE Outputs
Maker National
Total Page 8 Pages
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