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SN54ABTH245, SN74ABTH245

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS663D – APRIL 1996 – REVISED SEPTEMBER 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

State-of-the-Art

EPIC-

ΙΙ

 BiCMOS Design

Significantly Reduces Power Dissipation

Latch-Up Performance Exceeds 500 mA Per

JESD 17

Typical V

OLP

(Output Ground Bounce) < 1 V

at V

= 5 V, T

= 25°C

off

and Power-Up 3-State Support Hot

Insertion

High-Drive Outputs (–32-mA I

, 64-mA I

)

Bus Hold on Data Inputs Eliminates the

Need for External Pullup/Pulldown

Resistors

Package Options Include Plastic

Small-Outline (DW), Shrink Small-Outline

(DB), Thin Shrink Small-Outline (PW), and

Thin Very Small-Outline (DGV) Packages,

Ceramic Chip Carriers (FK), Plastic (N) and

Ceramic (J) DIPs, and Ceramic Flat (W)

Package

description

These octal bus transceivers are designed for

asynchronous communication between data

buses. The devices transmit data from the A bus

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

depending on the logic level at the

direction-control (DIR) input. The output-enable

(OE

) input can be used to disable the device so

the buses are effectively isolated.

When V

is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down.

However, to ensure the high-impedance state above 2.1 V, 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.

This device is fully specified for hot-insertion applications using I

off

and power-up 3-state. The I

off

circuitry

disables the outputs, preventing damaging current backflow through the device when it is powered down. The

power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,

which prevents driver conflict.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

The SN54ABTH245 is characterized for operation over the full military temperature range of –55°C to 125°C.

The SN74ABTH245 is characterized for operation from –40°C to 85°C.

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.

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.

EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.

SN54ABTH245 ...J OR W PACKAGE

SN74ABTH245 . . . DB, DGV, DW, N, OR PW PACKAGE

(TOP VIEW)

SN54ABTH245 . . . FK PACKAGE

(TOP VIEW)

DIR

GND

3212019

10 11 12 13

DIR

B6 OE

GND

Summary of content (21 pages)

PAGE 1
SN54ABTH245, SN74ABTH245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS663D – APRIL 1996 – REVISED SEPTEMBER 1999 D D D D description These octal bus transceivers are designed for asynchronous communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated.
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SN54ABTH245, SN74ABTH245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS663D – APRIL 1996 – REVISED SEPTEMBER 1999 FUNCTION TABLE INPUTS OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation logic symbol† 19 OE 1 DIR 2 A1 G3 3 EN1 [BA] 3 EN2 [AB] 18 1 B1 2 A2 A3 A4 A5 A6 A7 A8 3 17 4 16 5 15 6 14 7 13 8 12 9 11 B2 B3 B4 B5 B6 B7 B8 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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SN54ABTH245, SN74ABTH245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS663D – APRIL 1996 – REVISED SEPTEMBER 1999 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input voltage range, VI (except I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.
PAGE 4
SN54ABTH245, SN74ABTH245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS663D – APRIL 1996 – REVISED SEPTEMBER 1999 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH TEST CONDITIONS VCC = 4.5 V, VCC = 4.5 V, II = –18 mA IOH = –3 mA VCC = 5 V, VCC = 4 4.5 5V VOL VCC = 4 4.5 5V MIN SN54ABTH245 MIN –1.2 MAX SN74ABTH245 MIN –1.2 2.5 2.5 IOH = –3 mA IOH = –24 mA 3 3 3 2 2 IOH = –32 mA IOL = 48 mA 2* UNIT V V 2 0.
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SN54ABTH245, SN74ABTH245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS663D – APRIL 1996 – REVISED SEPTEMBER 1999 switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Figure 1) FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B B or A tPZH tPZL OE A or B tPHZ tPLZ OE A or B PARAMETER tsk(o) VCC = 5 V, TA = 25°C SN54ABTH245 MIN TYP MAX MIN MAX MIN MAX 1 2 3.2 0.8 3.8 1 3.6 1 2.6 3.5 0.8 4.
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SN54ABTH245, SN74ABTH245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS663D – APRIL 1996 – REVISED SEPTEMBER 1999 PARAMETER MEASUREMENT INFORMATION 500 Ω From Output Under Test S1 7V Open GND CL = 50 pF (see Note A) 500 Ω TEST S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 7V Open 3V LOAD CIRCUIT Timing Input 1.5 V 0V tw tsu 3V th 3V Input 1.5 V 1.5 V 0V 1.5 V Data Input 0V VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS SETUP AND HOLD TIMES 3V 1.5 V Input 1.5 V 0V 1.
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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 (4) 25-Sep-2013 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 17-Aug-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN74ABTH245DBR 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 SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 SN74ABTH245DWR SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1 SN74ABTH245PWR TSSOP PW 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 17-Aug-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74ABTH245DBR SSOP DB 20 2000 367.0 367.0 38.0 SN74ABTH245DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74ABTH245PWR TSSOP PW 20 2000 367.0 367.0 38.
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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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