Datasheet

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SN54AHC245, SN74AHC245

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCLS230I – OCTOBER 1995 – REVISED JULY 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Operating Range 2-V to 5.5-V V

Latch-Up Performance Exceeds 250 mA Per

JESD 17

description/ordering information

The ’AHC245 octal bus transceivers are designed

for asynchronous two-way communication

between data buses. The control-function

implementation minimizes external timing

requirements.

These devices allow data transmission 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

that the buses are effectively 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.

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP – N Tube SN74AHC245N SN74AHC245N

SOIC DW

Tube SN74AHC245DW

AHC245

SOIC

–

Tape and reel SN74AHC245DWR

AHC245

–40°C to 85°C

SSOP – DB Tape and reel SN74AHC245DBR HA245

TSSOP PW

Tube SN74AHC245PW

HA245

TSSOP

–

Tape and reel SN74AHC245PWR

HA245

TVSOP – DGV Tape and reel SN74AHC245DGVR HA245

CDIP – J Tube SNJ54AHC245J SNJ54AHC245J

–55°C to 125°C

CFP – W Tube SNJ54AHC245W SNJ54AHC245W

LCCC – FK Tube SNJ54AHC245FK SNJ54AHC245FK

†

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

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

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.

SN54AHC245 ...J OR W PACKAGE

SN74AHC245 . . . DB, DGV, DW, N, OR PW PACKAGE

(TOP VIEW)

SN54AHC245 . . . FK PACKAGE

(TOP VIEW)

DIR

GND

3212019

910111213

DIR

GND

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 (24 pages)

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SN54AHC245, SN74AHC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS230I – OCTOBER 1995 – REVISED JULY 2003 D D SN54AHC245 . . . J OR W PACKAGE SN74AHC245 . . . DB, DGV, DW, N, OR PW PACKAGE (TOP VIEW) Operating Range 2-V to 5.5-V VCC Latch-Up Performance Exceeds 250 mA Per JESD 17 DIR A1 A2 A3 A4 A5 A6 A7 A8 GND description/ordering information The ’AHC245 octal bus transceivers are designed for asynchronous two-way communication between data buses.
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SN54AHC245, SN74AHC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS230I – OCTOBER 1995 – REVISED JULY 2003 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) 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SN54AHC245, SN74AHC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS230I – OCTOBER 1995 – REVISED JULY 2003 recommended operating conditions (see Note 3) SN54AHC245 VCC VIH Supply voltage VCC = 2 V VCC = 3 V High-level input voltage VI VO IOH Low-level input voltage MAX 2 5.5 1.5 VCC = 5.5 V VCC = 2 V VIL MIN ∆t/∆v MIN MAX 2 5.5 2.1 2.1 3.85 0.5 VCC = 3 V VCC = 5.5 V UNIT V 1.5 3.85 V 0.5 0.9 0.9 1.65 1.65 V Input voltage OE or DIR 0 5.5 0 5.
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SN54AHC245, SN74AHC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS230I – OCTOBER 1995 – REVISED JULY 2003 switching characteristics over recommended operating VCC = 3.3 V ± 0.
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SN54AHC245, SN74AHC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS230I – OCTOBER 1995 – REVISED JULY 2003 noise characteristics, VCC = 5 V, CL = 50 pF, TA = 25°C (see Note 4) SN74AHC245 PARAMETER MIN TYP MAX UNIT VOL(P) VOL(V) Quiet output, maximum dynamic VOL 0.9 V Quiet output, minimum dynamic VOL –0.9 V VOH(V) VIH(D) Quiet output, minimum dynamic VOH 4.3 V High-level dynamic input voltage 3.
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SN54AHC245, SN74AHC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS230I – OCTOBER 1995 – REVISED JULY 2003 PARAMETER MEASUREMENT INFORMATION From Output Under Test RL = 1 kΩ From Output Under Test Test Point 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 VCC 50% VCC Timing Input tw tsu VCC Input 50% VCC 50% VCC 0V th VCC 50% VCC D
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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 Orderable Device 18-Oct-2013 Status (1) SNJ54AHC245W ACTIVE Package Type Package Pins Package Drawing Qty CFP W 20 1 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) TBD Call TI N / A for Pkg Type Op Temp (°C) Device Marking (4/5) -55 to 125 5962-9681801QS A SNJ54AHC245W (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 15-Aug-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 SN74AHC245DBR SSOP DB 20 2000 330.0 16.4 SN74AHC245DGVR TVSOP DGV 20 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74AHC245DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.
PAGE 12
PACKAGE MATERIALS INFORMATION www.ti.com 15-Aug-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74AHC245DBR SSOP DB 20 2000 367.0 367.0 38.0 SN74AHC245DGVR TVSOP DGV 20 2000 367.0 367.0 35.0 SN74AHC245DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74AHC245NSR SO NS 20 2000 367.0 367.0 45.0 SN74AHC245PWR 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.
PAGE 24
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.