Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Receiver, transceiver TSSOP 20

SN74AHCT245 . . . DB, DGV, DW, N, NS,

OR PW PACKAGE

(TOP VIEW)

3 2 1 20 19

10 11 12 13

DIR

B6 OE

GND

SN54AHCT245 . . . FK PACKAGE

(TOP VIEW)

DIR

GND

SN74AHCT245 . . . RGY PACKAGE

(TOP VIEW)

1 20

10 11

DIR

GND

SN54AHCT245 . . . J OR W PACKAGE

SN74AHCT245

SN54AHCT245

www.ti.com

SCLS233O –OCTOBER 1995–REVISED AUGUST 2013

OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

Check for Samples: SN74AHCT245, SN54AHCT245

FEATURES

DESCRIPTION

These octal bus transceivers are designed for

• Inputs Are TTL-Voltage Compatible

asynchronous two-way communication between data

• Latch-Up Performance Exceeds 250 mA Per

buses. The control-function implementation minimizes

JESD 17

external timing requirements.

• ESD Protection Exceeds JESD 22

The ’AHCT245 devices allow data transmission from

– 2000-V Human-Body Model (A114-A)

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

bus, depending on the logic level at the direction-

– 200-V Machine Model (A115-A)

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

– 1000-V Charged-Device Model (C101)

be used to disable the device so that the buses

effectively are isolated.

To ensure the high-impedance state during power up

or power down, OE should be tied to V

through a

pullup resistor; the minimum value of the resistor is

determined by the current-sinking capability of the

driver.

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

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

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (27 pages)

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SN74AHCT245 SN54AHCT245 www.ti.com SCLS233O – OCTOBER 1995 – REVISED AUGUST 2013 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS Check for Samples: SN74AHCT245, SN54AHCT245 FEATURES DESCRIPTION • • These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements.
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SN74AHCT245 SN54AHCT245 SCLS233O – OCTOBER 1995 – REVISED AUGUST 2013 www.ti.com FUNCTION TABLE (EACH TRANSCEIVER) 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) 1 DIR 19 OE A1 2 18 B1 To Seven Other Channels ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) Supply voltage range, VCC Input voltage range, VI (2) Output voltage range, VO (2) VALUE UNIT –0.5 to 7 V –0.
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SN74AHCT245 SN54AHCT245 www.ti.com SCLS233O – OCTOBER 1995 – REVISED AUGUST 2013 RECOMMENDED OPERATING CONDITIONS (1) SN54AHCT245 SN74AHCT245 MIN MAX MIN MAX 4.5 5.5 4.5 5.5 UNIT VCC Supply voltage VIH High-level input voltage VIL Low-level Input voltage 0.8 V VI Input voltage 0 5.5 0 5.
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SN74AHCT245 SN54AHCT245 SCLS233O – OCTOBER 1995 – REVISED AUGUST 2013 www.ti.com SWITCHING CHARACTERISTICS (continued) over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER tPHZ tPLZ FROM (INPUT) OE TO (OUTPUT) LOAD CAPACITANCE A or B CL = 50 pF tsk(o) (2) CL = 50 pF SN54AHCT245 –55°C TO 125°C TA = 25°C MAX MIN MAX Recommended SN74AHCT245 –40°C TO 125°C TYP MAX 10 15.4 1 17.5 1 16.5 1 17.5 10 15.4 1 17.
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SN74AHCT245 SN54AHCT245 www.ti.com SCLS233O – OCTOBER 1995 – REVISED AUGUST 2013 PARAMETER MEASUREMENT INFORMATION Test Point From Output Under Test RL = 1 kΩ From Output Under Test S1 VCC Open TEST GND CL (see Note A) CL (see Note A) S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Drain Open VCC GND VCC LOAD CIRCUIT FOR 3-STATE AND OPEN-DRAIN OUTPUTS LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS 3V 1.5 V Timing Input 0V tw 3V 1.5 V Input 1.5 V th tsu 3V 1.5 V Data Input 1.
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SN74AHCT245 SN54AHCT245 SCLS233O – OCTOBER 1995 – REVISED AUGUST 2013 www.ti.com REVISION HISTORY Changes from Revision N (March 2005) to Revision O • 6 Page Extended operating temperature range to 125°C .................................................................................................................
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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.com 6-Nov-2013 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-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) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 7.5 2.5 12.0 16.0 Q1 SN74AHCT245DBR SSOP DB 20 2000 330.0 16.4 SN74AHCT245DGVR TVSOP DGV 20 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74AHCT245DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.
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PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74AHCT245DBR SSOP DB 20 2000 367.0 367.0 38.0 SN74AHCT245DGVR TVSOP DGV 20 2000 367.0 367.0 35.0 SN74AHCT245DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74AHCT245NSR SO NS 20 2000 367.0 367.0 45.0 SN74AHCT245PWR TSSOP PW 20 2000 364.0 364.0 27.0 SN74AHCT245PWRG3 TSSOP PW 20 2000 364.0 364.0 27.
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MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,40 0,23 0,13 24 13 0,07 M 0,16 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 0°– 8° 1 0,75 0,50 12 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,08 14 16 20 24 38 48 56 A MAX 3,70 3,70 5,10 5,10 7,90 9,80 11,40 A MIN 3,50 3,50 4,90 4,90 7,70 9,60 11,20 DIM 4073251/E 08/00 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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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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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.