74ABT245
器件描述：Octal Bi-Directional Transceiver with 3-STATE Outputs
器件厂商：FAIRCHILD [Fairchild Semiconductor]
文件大小：118.56KB，共11页
Sponsor by e络盟器件资料摘要：
© 1999 Fairchild Semiconductor Corporation DS010945 www.fairchildsemi.com
September 1991
Revised November 1999
7
4
AB
T2
45 Oct
a
l
Bi-
D
ir
ecti
onal
T
r
anscei
ver
wit
h
3-
ST
A
T
E
Output
s
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
a73 Bidirectional non-inverting buffers
a73 A and B output sink capability of 64 mA, source
capability of 32 mA
a73 Guaranteed output skew
a73 Guaranteed multiple output switching specifications
a73 Output switching specified for both 50 pF and 250 pF
loads
a73 Guaranteed simultaneous switching, noise level and
dynamic threshold performance
a73 Guaranteed latchup protection
a73 High impedance glitch-free bus loading during entire
power up and power down cycle
a73 Non-destructive hot insertion capability
a73 Disable time is less than enable time to avoid bus
contention
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram Pin Descriptions
Order Number Package Number Package Description
74ABT245CSC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide 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, 0.300” Wide
Pin Names Description
OE Output Enable Input (Active LOW)
T/R Transmit/Receive Input
A
0
–A
7
Side A Inputs or 3-STATE Outputs
B
0
–B
7
Side B Inputs or 3-STATE Outputs
September 1991
Revised November 1999
7
4
AB
T2
45 Oct
a
l
Bi-
D
ir
ecti
onal
T
r
anscei
ver
wit
h
3-
ST
A
T
E
Output
s
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
a73 Bidirectional non-inverting buffers
a73 A and B output sink capability of 64 mA, source
capability of 32 mA
a73 Guaranteed output skew
a73 Guaranteed multiple output switching specifications
a73 Output switching specified for both 50 pF and 250 pF
loads
a73 Guaranteed simultaneous switching, noise level and
dynamic threshold performance
a73 Guaranteed latchup protection
a73 High impedance glitch-free bus loading during entire
power up and power down cycle
a73 Non-destructive hot insertion capability
a73 Disable time is less than enable time to avoid bus
contention
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram Pin Descriptions
Order Number Package Number Package Description
74ABT245CSC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide 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, 0.300” Wide
Pin Names Description
OE Output Enable Input (Active LOW)
T/R Transmit/Receive Input
A
0
–A
7
Side A Inputs or 3-STATE Outputs
B
0
–B
7
Side B Inputs or 3-STATE Outputs