74VCX2245 View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

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74VCX2245

Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs and 26
Ω Series Resistors in B Outputs

Fairchild Semiconductor 

June 1999

Revised April 2005

74VCX2245

Low Voltage Bidirectional Transceiver

with 3.6V Tolerant Inputs and Outputs

and 26: Series Resistors in B Outputs

General Description

The VCX2245 contains eight non-inverting bidirectional

buffers with 3-STATE outputs and is intended for bus ori-

ented applications. The T/R input determines the direction

of data flow. The OE input disables both the A and B ports

by placing them in a high impedance state.

The 74VCX2245 is designed for low voltage (1.4V to 3.6V)

VCC applications with I/O compatibility up to 3.6V. The

VCX2245 is also designed with 26: series resistance in

the B Port outputs. This design reduces line noise in appli-

cations such as memory address drivers, clock drivers, and

bus transceivers transmitters

The 74VCX2245 is fabricated with an advanced CMOS

technology to achieve high-speed operation while main-

taining low CMOS power dissipation.

Features

s 1.4V - 3.6V VCC supply operation

s 3.6V tolerant inputs and outputs

s 26: series resistors in B Port outputs

s Power-off high impedance inputs and outputs

s Supports Live Insertion and Withdrawal (Note 1)

s tPD (A to B)

4.4 ns max for 3.0V to 3.6V VCC

s Static Drive (IOH/IOL B outputs):

r12 mA @ 3.0V VCC

s Uses patented Quiet Series¥ noise/EMI reduction

circuitry

s Latchup performance exceeds JEDEC 78 conditions

s ESD performance:

Human body model ! 2000V

Machine model ! 200V

s Leadless DQFN Pb-Free package

Note 1: To ensure the high impedance state during power up and power

down, OEn should be tied to VCC through a pull up resistor. The minimum

value of the resistor is determined by the current sourcing capability of the

driver.

Ordering Code:

Order Number

Package

Number

Package Description

74VCX2245WM

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74VCX2245BQX

(Note 2)

MLP020B

Pb-Free 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC

MO-241, 2.5 x 4.5mm

74VCX2245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Pb-Free package per JEDEC J-STD-020B.

Note 2: DQFN package available in Tape and Reel only.

Logic Symbol

Pin Descriptions

Quiet Series¥ is a trademark of Fairchild Semiconductor Corporation.

Pin Names

Description

OE

T/R

A0–A7

B0–B7

Output Enable Input (Active LOW)

Transmit/Receive Input

Side A Inputs or 3-STATE Outputs

Side B Inputs or 3-STATE Outputs

© 2005 Fairchild Semiconductor Corporation DS500170

www.fairchildsemi.com

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