© 2005 Fairchild Semiconductor Corporation DS500409 www.fairchildsemi.com
October 2000
Revised March 2005
74LCXH2245 Low Voltage Bidirectional Transceiver with Bushold and 26: Series Resistors in B Outputs
74LCXH2245
Low Voltage Bidirectional Transceiver with Bushold
and 26: Series Resistors in B Outputs
General Description
The LCXH2245 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
(2.5V and 3.3V) V
CC
applications. The T/R input deter-
mines 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
series resistor in the B Port
output helps reduce output overshoot and undershoot.
The LCXH2245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
The LCXH2245 data inputs include active bushold circuitry,
eliminating the need for external pull-up resistors to hold
unused or floating data inputs at a valid logic level.
Features
■ 5V tolerant control inputs
■ 2.3V–3.6V V
CC
specifications provided
■ Bushold on inputs eliminates the need for external
pull-up/pull-down resistors
■ 7.0 ns t
PD
max (V
CC
3.3V), 10 A I
CC
max
■ Power down high impedance outputs
■ 12 mA output drive B Port (V
CC
3.0V)
■ Implements patented noise/EMI reduction circuitry
■ Latch-up performance exceeds 500 mA
■ Equivalent 26 series resistor on B Port outputs
■ 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.
Pb-Free package per JEDEC J-STD-020B.
Logic Symbol
Pin Descriptions
Connection Diagram
GTO is a trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74LCXH2245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LCXH2245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCXH2245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
74LCXH2245MTC 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
A
0
–A
7
Side A Inputs or 3-STATE Outputs (Bushold)
B
0
–B
7
Side B Inputs or 3-STATE Outputs (Bushold)