Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Receiver, transceiver SO 20

SN54HCT245, SN74HCT245

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCLS020E – MARCH 1984 – REVISED AUGUST 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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 Max I

Typical t

= 14 ns

±6-mA Output Drive at 5 V

Low Input Current of 1 µA Max

Inputs Are TTL-Voltage Compatible

description/ordering information

These octal bus transceivers are designed for

asynchronous two-way communication between

data buses. The control-function implementation

minimizes external timing requirements.

The ’HCT245 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 effectively isolated.

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

–40 C to 85 C

PDIP – N Tube of 20 SN74HCT245N SN74HCT245N

–40 C to 85 C

SOIC – DW

Tube of 25 SN74HCT245DW

HCT245

–40 C to 85 C

SOIC – DW

Reel of 2000 SN74HCT245DWR

HCT245

–40

C to 85

SOP – NS Reel of 2000 SN74HCT245NSR HCT245

–40°C to 85°C

SSOP – DB Reel of 2000 SN74HCT245DBR HT245

TSSOP – PW

Tube of 70 SN74HCT245PW

HT245

TSSOP – PW

Reel of 2000 SN74HCT245PWR

HT245

Reel of 250 SN74HCT245PWT

–55 C to 125 C

CDIP – J Tube of 20 SNJ54HCT245J SNJ54HCT245J

–55

C to 125

CFP – W Tube of 85 SNJ54HCT245W SNJ54HCT245W

LCCC – FK Tube of 55 SNJ54HCT245FK SNJ54HCT245FK

†

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications o

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

3 2 1 20 19

910111213

DIR

GND

SN54HCT245 . . . FK PACKAGE

(TOP VIEW)

DIR

GND

SN54HCT245 ...J OR W PACKAGE

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

(TOP VIEW)

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.

Summary of content (22 pages)

PAGE 1
SN54HCT245, SN74HCT245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS020E – MARCH 1984 – REVISED AUGUST 2003 D D D D D D D 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 Max ICC Typical tpd = 14 ns ±6-mA Output Drive at 5 V Low Input Current of 1 µA Max Inputs Are TTL-Voltage Compatible SN54HCT245 . . . J OR W PACKAGE SN74HCT245 . . .
PAGE 2
SN54HCT245, SN74HCT245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS020E – MARCH 1984 – REVISED AUGUST 2003 FUNCTION TABLE INPUTS OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation logic diagram (positive logic) DIR 1 19 A1 OE 2 18 B1 To Seven Other Channels absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
SN54HCT245, SN74HCT245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS020E – MARCH 1984 – REVISED AUGUST 2003 recommended operating conditions (see Note 3) SN54HCT245 NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 VCC VIH Supply voltage VIL VI Low-level input voltage Input voltage 0 VO ∆t/∆v Output voltage 0 High-level input voltage VCC = 4.5 V to 5.5 V VCC = 4.5 V to 5.5 V SN74HCT245 MIN 2 2 Input transition rise/fall time V V 0.8 VCC VCC UNIT 0 0 500 0.
PAGE 4
SN54HCT245, SN74HCT245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS020E – MARCH 1984 – REVISED AUGUST 2003 switching characteristics over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tpd A or B B or A ten OE A or B tt A or B VCC MIN TA = 25°C TYP MAX SN54HCT245 MIN MAX SN74HCT245 MIN MAX 4.5 V 20 30 45 38 5.5 V 18 27 41 34 4.5 V 36 59 89 74 5.5 V 30 53 80 67 4.
PAGE 5
SN54HCT245, SN74HCT245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS020E – MARCH 1984 – REVISED AUGUST 2003 PARAMETER MEASUREMENT INFORMATION VCC From Output Under Test CL (see Note A) PARAMETER S1 Test Point tPZH ten RL S2 1 kΩ tPZL tPHZ tdis –– LOAD CIRCUIT 2.7 V 2.7 V S1 S2 50 pF or 150 pF Open Closed Closed Open 1 kΩ tPLZ tpd or tt Input 1.3 V 0.3 V CL RL 50 pF 50 pF or 150 pF Open Closed Closed Open Open Open 3V 1.3 V 0.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 9
PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 1-Jul-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74HCT245DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 SN74HCT245DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74HCT245NSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 1-Jul-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74HCT245DBR SN74HCT245DWR SSOP DB 20 2000 367.0 367.0 38.0 SOIC DW 20 2000 367.0 367.0 45.0 SN74HCT245NSR SO NS 20 2000 367.0 367.0 45.0 SN74HCT245PWR TSSOP PW 20 2000 364.0 364.0 27.0 SN74HCT245PWT TSSOP PW 20 250 367.0 367.0 38.
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MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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