© 2005 Fairchild Semiconductor Corporation DS500170 www.fairchildsemi.com
June 1999
Revised April 2005
7
4
VC
X22
45
Low V
o
lt
age Bidi
rec
t
i
onal T
r
an
sceive
r w
i
th 3.
6V
T
o
l
e
rant

I
nput
s and
Out
put
s and
2
6
G58
Seri
es
Res
i
st
ors in B
Out
put
s
74VCX2245
Low Voltage Bidirectional Transceiver
with 3.6V Tolerant Inputs and Outputs
and 26G58 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)
V
CC
applications with I/O compatibility up to 3.6V. The
VCX2245 is also designed with 26c58 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
a73 1.4V - 3.6V V
CC
supply operation
a73 3.6V tolerant inputs and outputs
a73 26c58 series resistors in B Port outputs
a73 Power-off high impedance inputs and outputs
a73 Supports Live Insertion and Withdrawal (Note 1)
a73 t
PD
(A to B)
4.4 ns max for 3.0V to 3.6V V
CC
a73 Static Drive (I
OH
/I
OL
B outputs):
c11412 mA @ 3.0V V
CC
a73 Uses patented Quiet Seriesc165 noise/EMI reduction
circuitry
a73 Latchup performance exceeds JEDEC 78 conditions
a73 ESD performance:
Human body model c33 2000V
Machine model c33 200V
a73 Leadless DQFN Pb-Free package
Note 1: To ensure the high impedance state during power up and power
down, OE
n
should be tied to V
CC
through a pull up resistor. The minimum
value of the 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.
Pb-Free package per JEDEC J-STD-020B.
Note 2: DQFN package available in Tape and Reel only.
Logic Symbol Pin Descriptions
Quiet Seriesc165 is a trademark of Fairchild Semiconductor Corporation.
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
Pin Names Description
OE Output Enable Input (Active LOW)
T/R Transmit/Receive Input
A
0
–A
7
Side A Inputs or 3-STATE Outputs
B
0
–B
7
Side B Inputs or 3-STATE Outputs