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National Semiconductor Electronic Components Datasheet

74F245 Datasheet

Octal Bidirectional Transceiver with TRI-STATE Outputs

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June 1995
54F 74F245
Octal Bidirectional Transceiver with TRI-STATE Outputs
General Description
The ’F245 contains eight non-inverting bidirectional buffers
with TRI-STATE outputs and is intended for bus-oriented
applications Current sinking capability is 24 mA (20 mA Mil)
at the A ports and 64 mA (48 mA Mil) at the B ports The
Transmit Receive (T R) input determines the direction of
data flow through the bidirectional transceiver Transmit (ac-
tive HIGH) enables data from A ports to B ports Receive
(active LOW) enables data from B ports to A ports The
Output Enable input when HIGH disables both A and B
ports by placing them in a High Z condition
Features
Y Non-inverting buffers
Y Bidirectional data path
Y A outputs sink 24 mA (20 mA Mil)
Y B outputs sink 64 mA (48 mA Mil)
Y Guaranteed 4000V minimum ESD protection
Commercial
74F245PC
74F245SC (Note 1)
74F245SJ (Note 1)
74F245MSA (Note 1)
Military
54F245DM (Note 2)
54F245FM (Note 2)
54F245LM (Note 2)
Package
Number
N20A
J20A
M20B
M20D
MSA20
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 Molded Shrink Small Outline EIAJ Type II
20-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1 Devices also available in 13 reel Use suffix e SCX SJX and MSAX
Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Logic Symbols
IEEE IEC
TL F 9503 – 3
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9503
TL F 9503 – 4
RRD-B30M75 Printed in U S A


National Semiconductor Electronic Components Datasheet

74F245 Datasheet

Octal Bidirectional Transceiver with TRI-STATE Outputs

No Preview Available !

Connection Diagrams
Pin Assignment for
DIP SOIC SSOP and Flatpak
Pin Assignment
for LCC
TL F 9503–1
Unit Loading Fan Out
Pin Names
OE
TR
A0 – A7
B0 – B7
Description
Output Enable Input (Active LOW)
Transmit Receive Input
Side A Inputs or
TRI-STATE Outputs
Side B Inputs or
TRI-STATE Outputs
54F 74F
UL
HIGH LOW
10 20
10 20
3 5 1 083
150 40(38 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 b0 65 mA
b3 mA 24 mA (20 mA)
70 mA b0 65 mA
b12 mA 64 mA (48 mA)
Truth Table
Inputs
OE T R
LL
LH
HX
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Output
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
TL F 9503 – 2
2


Part Number 74F245
Description Octal Bidirectional Transceiver with TRI-STATE Outputs
Maker National Semiconductor
Total Page 8 Pages
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