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SN74HC245PWRG4 データシート(PDF) 9 Page - Texas Instruments

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部品番号 SN74HC245PWRG4
部品情報  Octal Bus Transceivers
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

SN74HC245PWRG4 データシート(HTML) 9 Page - Texas Instruments

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5 V LEDs, Relays,
or other system boards
OE
V
GND
A1
A8
B1
B8
Regulated 5 V
3.3 V µC
CC
DIR
or other system
boards
5 V LEDs, Relays,
or other system boards
OE
V
GND
A1
A8
B1
B8
Regulated 5 V or 3.3 V
µC
CC
DIR
5 V LEDs, Relays,
or other system
boards
µC
SN54HC245, SN74HC245
www.ti.com
SCLS131E – DECEMBER 1982 – REVISED SEPTEMBER 2015
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 SNx4HC245 is a low-drive CMOS device that can be used for a multitude of bus interface type applications
where output ringing is a concern. The low drive and slow edge rates will minimize overshoot and undershoot on
the outputs.
9.2 Typical Application
Figure 4. Typical Application Schematic
9.2.1 Design Requirements
This device uses CMOS technology and has balanced output drive. Care should be taken to avoid bus
contention because it can drive currents that would exceed maximum limits. Outputs can be combined to
produce higher drive but the high drive will also create faster edges into light loads, so routing and load
conditions should be considered to prevent ringing.
9.2.2 Detailed Design Procedure
1. Recommended Input Conditions
Rise time and fall time specs: See (
Δt/ΔV) in the Recommended Operating Conditions.
Specified high and low levels: See (VIH and VIL) in the Recommended Operating Conditions.
2. Recommend Output Conditions
Load currents should not exceed 25 mA per output and 75 mA total for the part.
Outputs should not be pulled above VCC.
Copyright © 1982–2015, Texas Instruments Incorporated
Submit Documentation Feedback
9
Product Folder Links: SN54HC245 SN74HC245


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