© 2000 Fairchild Semiconductor Corporation

DS500410

www.fairchildsemi.com

October 2000

Revised October 2000

74LCXZ2245

Low Voltage Bidirectional Transceiver

with 5V Tolerant Inputs and Outputs

and 26

Ω Series Resistors in B Outputs

General Description

The LCXZ2245 contains eight non-inverting bidirectional

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

ented applications. The device is designed for low voltage

ing to a 5V signal environment. The T/R input determines

the direction of data flow through the device. The OE input

disables both the A and B ports by placing them in a high

impedance state. The 26

Ω series resistor in the B Port out-

put helps reduce output overshoot and undershoot.

The LCXZ2245 is fabricated with an advanced CMOS

technology to achieve high speed operation while maintain-

ing CMOS low power dissipation.

high impedance state during power up or power down. This

places the outputs in the high impedance (Z) state prevent-

ing intermittent low impedance loading or glitching in bus

oriented applications.

Features

s 5V tolerant inputs and outputs

s Power down high impedance inputs and outputs

s Supports live insertion/withdrawal (Note 1)

s

±12 mA output drive on the B Port (V

s Implements patented noise/EMI reduction circuitry

s Latch-up performance exceeds 500 mA

s Equivalent 26

Ω series resistor on all B Port outputs

s ESD performance:

Human body model

> 2000V

Machine model

> 200V

Note 1: To ensure the high-impedance state during power up or down, OE

resistor is determined by the current-sourcing capability of the driver.

Ordering Code:

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

Logic Symbol

Pin Descriptions

Connection Diagram

Order Number

Package Number

Package Description

74LCXZ2245WM

M20B

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

74LCXZ2245SJ

M20D

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74LCXZ2245MSA

MSA20

20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide

74LCXZ2245MTC

MTC20

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

Pin Names

Description

OE

Output Enable Input

T/R

Transmit/Receive Input

Side A Inputs or 3-STATE Outputs

Side B Inputs or 3-STATE Outputs