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74AVCH2T45DCTRE4 Datasheet(PDF) 19 Page - Texas Instruments

Part No. 74AVCH2T45DCTRE4
Description  2-Supply, Bus Transceiver with Configurable Level-Shifting
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

74AVCH2T45DCTRE4 Datasheet(HTML) 19 Page - Texas Instruments

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SN74AVCH2T45
www.ti.com
SCES582H – JULY 2004 – REVISED APRIL 2015
10.2.2.2.1
Enable Times
Calculate the enable times for the SN74AVCH2T45 using the following formulas:
tPZH (DIR to A) = tPLZ (DIR to B) + tPLH (B to A)
(1)
tPZL (DIR to A) = tPHZ (DIR to B) + tPHL (B to A)
(2)
tPZH (DIR to B) = tPLZ (DIR to A) + tPLH (A to B)
(3)
tPZL (DIR to B) = tPHZ (DIR to A) + tPHL (A to B)
(4)
In a bidirectional application, these enable times provide the maximum delay from the time the DIR bit is
switched until an output is expected. For example, if the SN74AVCH2T45 initially is transmitting from A to B, the
DIR bit is switched; the B port of the device must be disabled before presenting it with an input. After the B port
has been disabled, an input signal applied to it appears on the corresponding A port after the specified
propagation delay.
10.2.2.3 Application Curve
Refer to Figure 9.
Copyright © 2004–2015, Texas Instruments Incorporated
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