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74ABT245 Datasheet

Octal Bi-Directional Transceiver with 3-STATE Outputs

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September 1991
Revised November 1999
74ABT245
Octal Bi-Directional Transceiver with 3-STATE Outputs
General Description
The ABT245 contains eight non-inverting bidirectional buff-
ers with 3-STATE outputs and is intended for bus-oriented
applications. Current sinking capability is 64 mA on both
the A and B ports. The Transmit/Receive (T/R) input deter-
mines the direction of data flow through the bidirectional
transceiver. Transmit (active 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
s Bidirectional non-inverting buffers
s A and B output sink capability of 64 mA, source
capability of 32 mA
s Guaranteed output skew
s Guaranteed multiple output switching specifications
s Output switching specified for both 50 pF and 250 pF
loads
s Guaranteed simultaneous switching, noise level and
dynamic threshold performance
s Guaranteed latchup protection
s High impedance glitch-free bus loading during entire
power up and power down cycle
s Non-destructive hot insertion capability
s Disable time is less than enable time to avoid bus
contention
Ordering Code:
Order Number Package Number
Package Description
74ABT245CSC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74ABT245CSJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ABT245CMSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74ABT245CMTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ABT245CPC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
OE
T/R
A0A7
B0B7
Description
Output Enable Input (Active LOW)
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
© 1999 Fairchild Semiconductor Corporation DS010945
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

74ABT245 Datasheet

Octal Bi-Directional Transceiver with 3-STATE Outputs

No Preview Available !

Logic Symbol
Logic Diagram
Truth Table
Inputs
OE T/R
LL
LH
HX
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Output
Bus B Data to Bus A
Bus A Data to Bus B
HIGH Z State
www.fairchildsemi.com
2


Part Number 74ABT245
Description Octal Bi-Directional Transceiver with 3-STATE Outputs
Maker Fairchild Semiconductor
Total Page 11 Pages
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