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PDF 74F2645 Data sheet ( Hoja de datos )
| Número de pieza | 74F2645 | |
| Descripción | Octal Bus Transceiver with 25 Series Resistors in the Outputs | |
| Fabricantes | Fairchild | |
| Logotipo |  |
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November 1989
Revised August 1999
74F2645
Octal Bus Transceiver
with 25Ω Series Resistors in the Outputs
General Description
This device is an octal bus transceiver designed for asyn-
chronous two-way data flow between the A and B busses
and is functionally equivalent to the 74F645. The 25Ω
series resistors in the outputs reduce ringing and eliminate
the need for external resistors. Both busses are capable of
sinking 12 mA, sourcing 15 mA, have 3-STATE outputs,
and a common output enable pin. The direction of data flow
is determined by the transmit/receive (T/R) input. The
74F2645 is a low power version of the 74F245 with 25Ω
series resistors in the outputs.
Features
s 25Ω series resistors in the outputs eliminates the need
for external resistors
s Designed for asynchronous two-way data flow between
busses
s Outputs sink 12 mA and source 15 mA
s Transmit/receive (T/R) input controls the direction of
data flow
s 74F2645 is a low power version of the 74F245 with 25Ω
series resistors in the outputs
Ordering Code:
Order Number Package Number
Package Description
74F2645SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
FAST® is a registered trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS010629
www.fairchildsemi.com
1 page  
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
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| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet 74F2645.PDF ] | |
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