Texas Instruments SN74HCT245PWR Bedienungsanleitung

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

SN54HCT245

SN74HCT245

SCLS020F – MARCH 1984 – REVISED AUGUST 2016

SNx4HCT245 Octal Bus Transceivers With 3-State Outputs

1 Features

• Operating Voltage Range of 4.5 V to 5.5 V

• High-Current 3-State Outputs Drive Bus Lines

Directly or up To 15-LSTTL Loads

• Low Power Consumption, 80-µA Maximum ICC

• Typical tpd = 14 ns

• ±6-mA Output Drive at 5 V

• Low Input Current of 1 µA Maximum

• Inputs Are TTL-Voltage Compatible

2 Applications

• Factory Automation and Control

• Grid Infrastructure

• Electronic Point of Sale

• Multi-Function Printers

• Motor Drives

• Storage

• Telecom Infrastructure

3 Description

The SNx4HCT245 octal bus transceivers are

designed for asynchronous two-way communication

between data buses. The control-function

implementation minimizes external timing

requirements.

The SNx4HCT245 devices allow data transmission

from the A bus to the B bus or from the B bus to the

A bus, depending upon the logic level at the direction-

control (DIR) input. The output-enable (OE) input can

be used to disable the device so that the buses are

eectively isolated.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)

SN54HCT245J CDIP (20) 24.20 mm × 6.92 mm

SN54HCT245FK LCCC (20) 8.89 mm × 8.89 mm

SN54HCT245W CFP (20) 13.09 mm × 6.92 mm

SN74HCT245DW SOIC (20) 12.80 mm × 7.50 mm

SN74HCT245N PDIP (20) 24.33 mm × 6.35 mm

SN74HCT245NS SOP (20) 12.60 mm × 5.30 mm

SN74HCT245PW TSSOP (20) 6.50 mm × 4.40 mm

SN74HCT245DB SSOP (20) 7.80 mm × 7.20 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Logic Diagram (Positive Logic)

SN54HCT245

SN74HCT245

SCLS020F – MARCH 1984 – REVISED AUGUST 2016

www.ti.com

Product Folder Links: SN54HCT245 SN74HCT245

Table of Contents

1 Features .................................................................. 1

2 Applications ........................................................... 1

3 Description ............................................................. 1

4 Revision History..................................................... 2

5 Pin Conguration and Functions ......................... 3

6 Specications......................................................... 4

6.1 Absolute Maximum Ratings ...................................... 4

6.2 ESD Ratings.............................................................. 4

6.3 Recommended Operating Conditions ....................... 4

6.4 Thermal Information.................................................. 5

6.5 Electrical Characteristics........................................... 5

6.6 Switching Characteristics: CL= 50 pF ...................... 6

6.7 Switching Characteristics: CL= 150 pF .................... 7

6.8 Operating Characteristics.......................................... 7

6.9 Typical Characteristics.............................................. 7

7 Parameter Measurement Information .................. 8

8 Detailed Description .............................................. 9

8.1 Overview ................................................................... 9

8.2 Functional Block Diagram ......................................... 9

8.3 Feature Description................................................... 9

8.4 Device Functional Modes.......................................... 9

9 Application and Implementation ........................ 10

9.1 Application Information............................................ 10

9.2 Typical Application ................................................. 10

10 Power Supply Recommendations ..................... 12

11 Layout................................................................... 12

11.1 Layout Guidelines ................................................. 12

11.2 Layout Example .................................................... 12

12 Device and Documentation Support ................. 13

12.1 Documentation Support ........................................ 13

12.2 Related Links ........................................................ 13

12.3 Receiving Notication of Documentation Updates 13

12.4 Community Resource............................................ 13

12.5 Trademarks ........................................................... 13

12.6 Electrostatic Discharge Caution............................ 13

12.7 Glossary ................................................................ 13

13 Mechanical, Packaging, and Orderable

Information ........................................................... 13

4 Revision History

NOTE: Page numbers for previous revisions may dier from page numbers in the current version.

Changes from Revision E (August 2003) to Revision F Page

• Deleted Ordering Information, see POA at the end of the datasheet. ................................................................................... 1

• Added table, section, ,ESD Ratings Feature Description Device Functional Modes Application and Implementation

section, section, section, section, andPower Supply Recommendations Layout Device and Documentation Support

Mechanical, Packaging, and Orderable Information section ................................................................................................. 1

• Updated values in the table...................................................................................................................Thermal Information 5

3 2 1 20 19

9 10 11 12 13

DIR

B6 OE

GND

SN54HCT245 . . . FK PACKAGE

(TOP VIEW)

DIR

GND

VCC

SN54HCT245 . . . J OR W PACKAGE

SN74HCT245 . . . DB, DW, N, NS, OR PW PACKAGE

(TOP VIEW)

SN54HCT245

SN74HCT245

www.ti.com

SCLS020F – MARCH 1984 –REVISED AUGUST 2016

Product Folder Links: SN54HCT245 SN74HCT245

5 Pin Conguration and Functions

Pin Functions

PIN I/O DESCRIPTION

NO. NAME

1 DIR I Direction select. High = A to B, Low = B to A

2 A1 I/O Channel 1 port A

3 A2 I/O Channel 2 port A

4 A3 I/O Channel 3 port A

5 A4 I/O Channel 4 port A

6 A5 I/O Channel 5 port A

7 A6 I/O Channel 6 port A

8 A7 I/O Channel 7 port A

9 A8 I/O Channel 8 port A

10 GND — Ground

11 B8 O/I Channel 1 port B

12 B7 O/I Channel 2 port B

13 B6 O/I Channel 3 port B

14 B5 O/I Channel 4 port B

15 B4 O/I Channel 5 port B

16 B3 O/I Channel 6 port B

17 B2 O/I Channel 7 port B

18 B1 O/I Channel 8 port B

19 OE I Output enable, active low. High = all ports in high impedance mode, Low = all ports active

20 VCC — Power supply

Produktspezifikationen

Marke:	Texas Instruments
Kategorie:	Nicht kategorisiert
Modell:	SN74HCT245PWR
Breite:	6.6 mm
Tiefe:	4.5 mm
Höhe:	1.05 mm
Betriebstemperatur:	-40 - 85 °C
Verpackungsbreite:	449 mm
Verpackungstiefe:	853 mm
Verpackungshöhe:	35 mm
Typ:	Logik-IC
Menge pro Packung:	2000 Stück(e)
Verpackungsart:	TSSOP
Temperaturbereich bei Lagerung:	-65 - 150 °C
Anzahl Pins:	20
Breite (mit Pins):	6.6 mm
Tiefe (mit Pins):	6.6 mm
Höhe (mit Pins):	1.2 mm