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SN74AHCT240NSR Datasheet(PDF) 8 Page - Texas Instruments

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No. de pieza SN74AHCT240NSR
Descripción Electrónicos  SNx4AHCT240 Octal Buffers/Drivers With 3-State Outputs
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Fabricante Electrónico  TI1 [Texas Instruments]
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SN74AHCT240NSR Datasheet(HTML) 8 Page - Texas Instruments

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1Y1
1OE
1A1
1Y2
1A2
1Y3
1A3
1Y4
1A4
2Y1
2OE
2A1
2Y2
2A2
2Y3
2A3
2Y4
2A4
Copyright © 2016, Texas Instruments Incorporated
8
SN54AHCT240, SN74AHCT240
SCLS252M – OCTOBER 1995 – REVISED APRIL 2016
www.ti.com
Product Folder Links: SN54AHCT240 SN74AHCT240
Submit Documentation Feedback
Copyright © 1995–2016, Texas Instruments Incorporated
9 Detailed Description
9.1 Overview
The SN74AHCT240 devices are organized as two 4-bit buffers/line drivers with separate output-enable (OE)
inputs. When OE is low, the device passes inverted data from the A inputs to the Y outputs. When OE is high,
the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power
down, OE should be tied to VCC through a pull-up resistor; the minimum value of the resistor is determined by the
current-sinking capability of the driver.
9.2 Functional Block Diagram
9.3 Feature Description
VCC is optimized at 5 V
Allows up-voltage translation from 3.3 V to 5 V
Inputs accept VIH levels of 2 V
Slow edge rates minimize output ringing
Inputs are TTL-voltage compatible
9.4 Device Functional Modes
Table 1. Function Table
(Each 4-bit Buffer/Driver)
INPUTS
OUTPUT
Y
OE
A
L
H
H
L
L
L
H
X
Z


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