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SN74CBT3244DGVR Folha de dados(PDF) 8 Page - Texas Instruments

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Nome de Peças SN74CBT3244DGVR
Descrição Electrónicos  Octal FET Bus Switch
Download  31 Pages
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

SN74CBT3244DGVR Folha de dados(HTML) 8 Page - Texas Instruments

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3
12
18
8
11
2
Bus
Controller
ron
ron
1
1OE
1A1
1A4
8
1A2
1A3
Device
8
ron
ron
19
17
2OE
2A1
2A4
2A2
2A3
1B1
1B4
1B2
1B3
2B1
2B4
9
2B2
2B3
20
10
0.1uF
VCC
Gnd
SN74CBT3244
SCDS001O – NOVEMBER 1992 – REVISED SEPTEMBER 2015
www.ti.com
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The SN74CBT3244 device can be used to control up to 4 bits with 2 channels simultaneously. The application
shown in Figure 4 is a 8-bit bus being controlled. The OE pins are used to control the chip from the bus
controller. This is a generic example and can apply to many situations. If an application requires fewer than 8
bits, ensure that the A side is tied either high or low on unused channels.
9.2 Typical Application
Figure 4. Typical Application
9.2.1 Design Requirements
A 0.1-µF bypass capacitor should be placed between each VCC pin and GND. Each capacitor should be placed
as close as possible to the SN74CBT3244 device.
9.2.2 Detailed Design Procedure
1. Recommended input conditions:
For specified high and low levels, see VIH and VIL in Electrical Characteristics
Inputs and outputs are overvoltage tolerant, which allows them to go as high as 5.5 V at any valid VCC
2. Recommended output conditions:
Load currents must not exceed ±64 mA per channel
3. Frequency selection criterion:
Added trace resistance or capacitance can reduce maximum frequency capability; use layout practices as
directed in Layout Guidelines
8
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Copyright © 1992–2015, Texas Instruments Incorporated
Product Folder Links: SN74CBT3244


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