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SN74CB3T3245DWRG4 Fiches technique(PDF) 10 Page - Texas Instruments

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No de pièce SN74CB3T3245DWRG4
Description  8-Bit FET Bus Switch
Download  28 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

SN74CB3T3245DWRG4 Fiches technique(HTML) 10 Page - Texas Instruments

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2
19
1
RON
SN74CB3T3245
Bus
Controller
8
Device
8
20
A1
VCC
NC
OE
0.1 2F
VCC
3
RON
A2
4
RON
A3
5
RON
A4
6
RON
A5
7
RON
A6
8
RON
A7
9
RON
A8
10
GND
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
B8
SN74CB3T3245
SCDS136B – OCTOBER 2003 – REVISED JUNE 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
This application is specifically to connect a 5-V bus to a 3.3-V device. It is assumed that communication in this
particular application is one-directional, going from the bus controller to the device.
9.2 Typical Application
Figure 8. Typical Application Schematic
9.2.1 Design Requirements
This device uses CMOS technology and has balanced output drive. Take care to avoid bus contention because it
can drive currents that would exceed maximum limits.
Because this design is for down-translating voltage, no pullup resistors are required.
9.2.2 Detailed Design Procedure
1. Recommended Input conditions
Specified high and low levels. See (VIH and VIL) in Recommended Operating Conditions
Inputs are overvoltage tolerant allowing them to go as high as 7 V at any valid VCC
2. Recommend output conditions
Load currents should not exceed 128 mA on each channel
10
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