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DM74AS245N

Description
Octal Bus Transceiver with 3-STATE Outputs
Categorylogic    logic   
File Size59KB,5 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
Environmental Compliance
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DM74AS245N Overview

Octal Bus Transceiver with 3-STATE Outputs

DM74AS245N Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerFairchild
Parts packaging codeDIP
package instructionDIP, DIP20,.3
Contacts20
Reach Compliance Codeunknown
Other featuresWITH DIRECTION CONTROL
Control typeCOMMON CONTROL
Counting directionBIDIRECTIONAL
seriesAS
JESD-30 codeR-PDIP-T20
length26.075 mm
Logic integrated circuit typeBUS TRANSCEIVER
MaximumI(ol)0.048 A
Number of digits8
Number of functions1
Number of ports2
Number of terminals20
Maximum operating temperature70 °C
Minimum operating temperature
Output characteristics3-STATE
Output polarityTRUE
Package body materialPLASTIC/EPOXY
encapsulated codeDIP
Encapsulate equivalent codeDIP20,.3
Package shapeRECTANGULAR
Package formIN-LINE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply5 V
Maximum supply current (ICC)149 mA
Prop。Delay @ Nom-Sup7.5 ns
propagation delay (tpd)7.5 ns
Certification statusNot Qualified
Maximum seat height5.08 mm
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)4.5 V
Nominal supply voltage (Vsup)5 V
surface mountNO
technologyTTL
Temperature levelCOMMERCIAL
Terminal formTHROUGH-HOLE
Terminal pitch2.54 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
translateN/A
width7.62 mm
Base Number Matches1
DM74AS245 Octal Bus Transceiver with 3-STATE Outputs
October 1986
Revised February 2000
DM74AS245
Octal Bus Transceiver with 3-STATE Outputs
General Description
This advanced Schottky device contains 8 pairs of
3-STATE logic elements configured as octal bus transceiv-
ers. These circuits are designed for use in memory, micro-
processor systems and in asynchronous bidirectional data
buses. Two way communication between buses is con-
trolled by the (DIR) input. Data transmits either from the A
bus to the B bus or from the B bus to the A bus. Both the
driver and receiver outputs can be disabled via the (G)
enable input which causes outputs to enter the high imped-
ance mode so that the buses are effectively isolated.
Features
s
Advanced oxide-isolated, ion-implanted Schottky
TTL process
s
Non-inverting logic output
s
3-STATE outputs independently controlled on
A and B buses
s
Low output impedance to drive terminated transmission
lines to 133Ω
s
Switching response specified into 500Ω/50 pF
s
Specified to interface with CMOS at V
OH
=
V
CC
2V
s
PNP inputs reduce input loading
s
Switching specifications guaranteed over full
temperature and V
CC
range
Ordering Code:
Order Number
DM74AS245WM
DM74AS245SJ
DM74AS245N
Package Number
M20B
M20D
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Control
Inputs
G
L
L
H
DIR
L
H
X
B Data to A Bus
A Data to B Bus
Hi-Z
Operation
© 2000 Fairchild Semiconductor Corporation
DS006299
www.fairchildsemi.com

DM74AS245N Related Products

DM74AS245N DM74AS245 DM74AS245SJ DM74AS245WM
Description Octal Bus Transceiver with 3-STATE Outputs Octal Bus Transceiver with 3-STATE Outputs Octal Bus Transceiver with 3-STATE Outputs Octal Bus Transceiver with 3-STATE Outputs
Is it Rohs certified? conform to - incompatible conform to
Parts packaging code DIP - SOIC SOIC
package instruction DIP, DIP20,.3 - SOP, SOP20,.3 0.300 INCH, MS-013, SOIC-20
Contacts 20 - 20 20
Reach Compliance Code unknown - unknow unknown
Other features WITH DIRECTION CONTROL - WITH DIRECTION CONTROL WITH DIRECTION CONTROL
Control type COMMON CONTROL - COMMON CONTROL COMMON CONTROL
Counting direction BIDIRECTIONAL - BIDIRECTIONAL BIDIRECTIONAL
series AS - AS AS
JESD-30 code R-PDIP-T20 - R-PDSO-G20 R-PDSO-G20
length 26.075 mm - 12.6 mm 12.8 mm
Logic integrated circuit type BUS TRANSCEIVER - BUS TRANSCEIVER BUS TRANSCEIVER
MaximumI(ol) 0.048 A - 0.048 A 0.048 A
Number of digits 8 - 8 8
Number of functions 1 - 1 1
Number of ports 2 - 2 2
Number of terminals 20 - 20 20
Maximum operating temperature 70 °C - 70 °C 70 °C
Output characteristics 3-STATE - 3-STATE 3-STATE
Output polarity TRUE - TRUE TRUE
Package body material PLASTIC/EPOXY - PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code DIP - SOP SOP
Encapsulate equivalent code DIP20,.3 - SOP20,.3 SOP20,.4
Package shape RECTANGULAR - RECTANGULAR RECTANGULAR
Package form IN-LINE - SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) NOT SPECIFIED - NOT SPECIFIED 260
power supply 5 V - 5 V 5 V
Maximum supply current (ICC) 149 mA - 149 mA 149 mA
propagation delay (tpd) 7.5 ns - 7.5 ns 7.5 ns
Certification status Not Qualified - Not Qualified Not Qualified
Maximum seat height 5.08 mm - 2.1 mm 2.65 mm
Maximum supply voltage (Vsup) 5.5 V - 5.5 V 5.5 V
Minimum supply voltage (Vsup) 4.5 V - 4.5 V 4.5 V
Nominal supply voltage (Vsup) 5 V - 5 V 5 V
surface mount NO - YES YES
technology TTL - TTL TTL
Temperature level COMMERCIAL - COMMERCIAL COMMERCIAL
Terminal form THROUGH-HOLE - GULL WING GULL WING
Terminal pitch 2.54 mm - 1.27 mm 1.27 mm
Terminal location DUAL - DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED - NOT SPECIFIED NOT SPECIFIED
translate N/A - N/A N/A
width 7.62 mm - 5.3 mm 7.5 mm
Base Number Matches 1 - 1 1
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