© 2002 Fairchild Semiconductor Corporation DS500648 www.fairchildsemi.com
September 2001
Revised February 2002
74ALVCH245 Low Voltage Bidirectional Transceiver with Bushold
74ALVCH245
Low Voltage Bidirectional Transceiver with Bushold
General Description
The ALVCH245 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 ALVCH245
data inputs include active bushold circuitry, eliminating the
need for external pull-up resistors to hold unused or float-
ing data inputs at a valid logic level.
The 74ALVCH245 is designed for low voltage (1.65V to
3.6V) V
CC
applications.
The 74ALVCH245 is fabricated with an advanced CMOS
technology to achieve high-speed operation while main-
taining low CMOS power dissipation.
Features
■ 1.65V to 3.6V V
CC
supply operation
■ Bushold on data inputs eliminates the need for external
pull-up/pull-down resistors
■ t
PD
3.6 ns max for 3.0V to 3.6V V
CC
4.2 ns max for 2.3V to 2.7V V
CC
6 ns max for 1.65V to 1.95V V
CC
■ Uses patented Quiet Series noise/EMI reduction
circuitry
■ Latchup conforms to JEDEC JED78
■ ESD performance:
Human body model
> 2000V
Machine model
> 200V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol Pin Descriptions
Quiet Series is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74ALVCH245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74ALVCH245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names Description
OE
Output Enable Input (Active LOW)
T/R
Transmit/Receive Input
A
0
–A
7
Side A Bushold Inputs or 3-STATE Outputs
B
0
–B
7
Side B Bushold Inputs or 3-STATE Outputs
