Datasheet

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CY74FCT2245T

8-BIT TRANSCEIVER

WITH 3-STATE OUTPUTS

SCCS037B – JULY 1994 – REVISED NOVEMBER 2001

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Function and Pinout Compatible With FCT

and F Logic

25-Ω Output Series Resistors to Reduce

Transmission-Line Reflection Noise

Edge-Rate Control Circuitry for

Significantly Improved Noise

Characteristics

off

Supports Partial-Power-Down Mode

Operation

Fully Compatible With TTL Input and

Output Logic Levels

ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

12-mA Output Sink Current

15-mA Output Source Current

3-State Outputs

description

The CY74FCT2245T contains eight noninverting, bidirectional buffers with 3-state outputs intended for

bus-oriented applications. On-chip termination resistors at the outputs reduce system noise caused by

reflections. For this reason, the CY74FCT2245T can replace the CY74FCT245T in an existing design. The

CY74FCT2245T current-sinking capability is 12 mA at the A and B ports.

The transmit/receive (T/R) input determines the direction of data flow through the bidirectional transceiver.

Transmit (active high) enables data from A ports to B ports; receive (active low) enables data from B ports to

A ports. The output-enable (OE

) input, when high, disables both the A and B ports by putting them in the

high-impedance state.

This device is fully specified for partial-power-down applications using I

off

. The I

off

circuitry disables the outputs,

preventing damaging current backflow through the device when it is powered down.

ORDERING INFORMATION

PACKAGE

†

SPEED

(ns)

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

QSOP – Q Tape and reel 4.1 CY74FCT2245CTQCT FCT2245

SOIC SO

Tube 4.1 CY74FCT2245CTSOC

FCT2245

SOIC

–

Tape and reel 4.1 CY74FCT2245CTSOCT

FCT2245

DIP – P Tube 4.6 CY74FCT2245ATPC 74FCT2245ATPC

40°Cto85°C

QSOP – Q Tape and reel 4.6 CY74FCT2245ATQCT FCT2245A

–

40°C

85°C

SOIC SO

Tube 4.6 CY74FCT2245ATSOC

FCT2245A

SOIC

–

Tape and reel 4.6 CY74FCT2245ATSOCT

FCT2245A

QSOP – Q Tape and reel 7.0 CY74FCT2245TQCT FCT2245

SOIC SO

Tube 7.0 CY74FCT2245TSOC

FCT2245

SOIC

–

Tape and reel 7.0 CY74FCT2245TSOCT

FCT2245

†

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.

T/R

GND

P, Q, OR SO PACKAGE

(TOP VIEW)

Summary of content (18 pages)

PAGE 1
CY74FCT2245T 8-BIT TRANSCEIVER WITH 3-STATE OUTPUTS SCCS037B – JULY 1994 – REVISED NOVEMBER 2001 D D D D D D D D P, Q, OR SO PACKAGE (TOP VIEW) Function and Pinout Compatible With FCT and F Logic 25-Ω Output Series Resistors to Reduce Transmission-Line Reflection Noise Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics Ioff Supports Partial-Power-Down Mode Operation Fully Compatible With TTL Input and Output Logic Levels ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (
PAGE 2
CY74FCT2245T 8-BIT TRANSCEIVER WITH 3-STATE OUTPUTS SCCS037B – JULY 1994 – REVISED NOVEMBER 2001 FUNCTION TABLE INPUTS OE OUTPUT T/R L L Bus B data to bus A L H Bus A data to bus B H X Z H = High logic level, L = Low logic level, X = Don’t care, Z = High-impedance state logic diagram (positive logic) T/R 1 19 A0 OE 2 18 B0 To Seven Other Channels absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range to ground potential . . . .
PAGE 3
CY74FCT2245T 8-BIT TRANSCEIVER WITH 3-STATE OUTPUTS SCCS037B – JULY 1994 – REVISED NOVEMBER 2001 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIK VOH VCC = 4.75, VCC = 4.75, IIN = –18 mA IOH = –15 mA VOL Rout VCC = 4.75, VCC = 4.75, IOL = 12 mA IOL = 12 mA Vhys II All inputs IIH IIL IOZH IOZL IOS‡ Ioff ICC ∆ICC ICCD¶ IC# MIN 2.4 20 TYP† MAX UNIT –0.7 –1.2 V 3.3 V 0.3 0.
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CY74FCT2245T 8-BIT TRANSCEIVER WITH 3-STATE OUTPUTS SCCS037B – JULY 1994 – REVISED NOVEMBER 2001 switching characteristics over operating free-air temperature range (see Figure 1) 4 PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL An or Bn Bn or An tPZH tPZL OE A or B tPHZ tPLZ OE A or B POST OFFICE BOX 655303 CY74FCT2245T CY74FCT2245AT CY74FCT2245CT MIN MAX MIN MAX MIN MAX 1.5 7 1.5 4.6 1.5 4.1 1.5 7 1.5 4.6 1.5 4.1 1.5 9.5 1.5 6.2 1.5 5.8 1.5 9.5 1.5 6.2 1.5 5.
PAGE 5
CY74FCT2245T 8-BIT TRANSCEIVER WITH 3-STATE OUTPUTS SCCS037B – JULY 1994 – REVISED NOVEMBER 2001 PARAMETER MEASUREMENT INFORMATION 7V From Output Under Test From Output Under Test Test Point CL = 50 pF (see Note A) Open TEST GND CL = 50 pF (see Note A) 500 Ω S1 500 Ω S1 Open 7V Open tPLH/tPHL tPLZ/tPZL tPHZ/tPZH 500 Ω LOAD CIRCUIT FOR 3-STATE OUTPUTS LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS 3V 1.5 V Timing Input 0V tw tsu 3V 1.5 V Input 1.5 V th 3V 1.5 V Data Input 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 (3) 16-Aug-2012 MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information.
PAGE 9
PACKAGE MATERIALS INFORMATION www.ti.com 16-Aug-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) CY74FCT2245ATPWR TSSOP PW 20 2000 330.0 16.4 6.95 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 7.1 1.6 8.0 16.0 Q1 CY74FCT2245ATQCT SSOP DBQ 20 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 CY74FCT2245ATSOCT SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 16-Aug-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) CY74FCT2245ATPWR CY74FCT2245ATQCT TSSOP PW 20 2000 367.0 367.0 38.0 SSOP DBQ 20 2500 367.0 367.0 38.0 CY74FCT2245ATSOCT SOIC DW 20 2000 367.0 367.0 45.0 CY74FCT2245CTQCT SSOP DBQ 20 2500 367.0 367.0 38.0 CY74FCT2245CTSOCT SOIC DW 20 2000 367.0 367.0 45.0 CY74FCT2245TQCT SSOP DBQ 20 2500 367.
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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 JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.