Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Receiver, transceiver SOIC 20

www.ti.com

FEATURES

DESCRIPTION/ORDERING INFORMATION

DGV, DW, NS, OR PW PACKAGE

(TOP VIEW)

DIR

GND

SN74ALVCH245

OCTAL BUS TRANSCEIVER

WITH 3-STATE OUTPUTS

SCES119G – JULY 1997 – REVISED SEPTEMBER 2004

• Operates From 1.65 V to 3.6 V

• Max t

of 3.4 ns at 3.3 V

• ± 24-mA Output Drive at 3.3 V

• Bus Hold on Data Inputs Eliminates the Need

for External Pullup/Pulldown Resistors

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

This octal bus transceiver is designed for 1.65-V to

3.6-V V

operation.

The SN74ALVCH245 is designed for asynchronous

communication between data buses. The device

transmits 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.

<br/>

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.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors

with the bus-hold circuitry is not recommended.

ORDERING INFORMATION

PACKAGE

(1)

ORDERABLE PART NUMBER TOP-SIDE MARKING

Tube SN74ALVCH245DW

SOIC - DW ALVCH245

Tape and reel SN74ALVCH245DWR

SOP - NS Tape and reel SN74ALVCH245NSR ALVCH245

-40 ° C to 85 ° C

Tube SN74ALVCH245PW

TSSOP - PW VB245

Tape and reel SN74ALVCH245PWR

TVSOP - DGV Tape and reel SN74ALVCH245DGVR VB245

(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

FUNCTION TABLE

INPUTS

OPERATION

OE DIR

L L B data to A bus

L H A data to B bus

H X Isolation

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 (15 pages)

PAGE 1
SN74ALVCH245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCES119G – JULY 1997 – REVISED SEPTEMBER 2004 FEATURES • • • • • DGV, DW, NS, OR PW PACKAGE (TOP VIEW) Operates From 1.65 V to 3.6 V Max tpd of 3.4 ns at 3.3 V ±24-mA Output Drive at 3.
PAGE 2
SN74ALVCH245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCES119G – JULY 1997 – REVISED SEPTEMBER 2004 LOGIC DIAGRAM (POSITIVE LOGIC) DIR 1 19 A1 OE 2 18 B1 To Seven Other Channels ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) VCC Supply voltage range MIN MAX -0.5 4.6 Except I/O ports (2) -0.5 4.6 I/O ports (2) (3) -0.5 VCC + 0.5 -0.5 VCC + 0.
PAGE 3
SN74ALVCH245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCES119G – JULY 1997 – REVISED SEPTEMBER 2004 RECOMMENDED OPERATING CONDITIONS (1) VCC Supply voltage VCC = 1.65 V to 1.95 V VIH High-level input voltage MIN MAX 1.65 3.6 Low-level input voltage VI Input voltage VO Output voltage IOH High-level output current IOL Low-level output current ∆t/∆v Input transition rise or fall rate TA Operating free-air temperature (1) V 0.65 × VCC VCC = 2.3 V to 2.7 V 1.7 VCC = 2.
PAGE 4
SN74ALVCH245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCES119G – JULY 1997 – REVISED SEPTEMBER 2004 ELECTRICAL CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC IOH = -100 µA 1.65 V to 3.6 V 1.65 V IOH = -6 mA 2.3 V 2 2.3 V 1.7 2.7 V 2.2 3V 2.4 IOH = -24 mA 3V 2 IOL = 100 µA IOH = -12 mA II(hold) V 1.65 V to 3.6 V 0.2 1.65 V 0.45 IOL = 6 mA 2.3 V 0.4 2.3 V 0.7 IOL = 24 mA 2.7 V 0.
PAGE 5
SN74ALVCH245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS www.ti.com SCES119G – JULY 1997 – REVISED SEPTEMBER 2004 PARAMETER MEASUREMENT INFORMATION VLOAD S1 RL From Output Under Test Open GND CL (see Note A) RL TEST S1 tpd tPLZ/tPZL tPHZ/tPZH Open VLOAD GND LOAD CIRCUIT INPUT VCC 1.8 V ± 0.15 V 2.5 V ± 0.2 V 2.7 V 3.3 V ± 0.3 V VI tr/tf VCC VCC 2.7 V 2.7 V ≤2 ns ≤2 ns ≤2.5 ns ≤2.5 ns VM VLOAD CL RL V∆ VCC/2 VCC/2 1.5 V 1.
PAGE 6
PACKAGE OPTION ADDENDUM www.ti.
PAGE 7
PACKAGE OPTION ADDENDUM www.ti.com 21-Mar-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.
PAGE 8
PACKAGE MATERIALS INFORMATION www.ti.com 17-Aug-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN74ALVCH245DGVR 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 TVSOP DGV 20 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74ALVCH245DWR SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1 SN74ALVCH245PWR TSSOP PW 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.
PAGE 9
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) SN74ALVCH245DGVR TVSOP DGV 20 2000 367.0 367.0 35.0 SN74ALVCH245DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74ALVCH245PWR TSSOP PW 20 2000 367.0 367.0 38.
PAGE 10
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.
PAGE 11
PAGE 12
PAGE 13
PAGE 14
PAGE 15
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.