© 2005 Fairchild Semiconductor Corporation DS500052 www.fairchildsemi.com
August 1998
Revised June 2005
7
4LCXR
1
62245
Low

V
o
lt
age
16-
Bit
Bi
dir
ecti
onal
T
r
anscei
ver
wit
h
5V
T
o
ler
ant
I
nput
s/
O
u
t
put
s
and 2
6
G58
Seri
es
Res
i
st
ors in the

Outp
ut
s
Print form created on June 10, 2005 12:56 pm
74LCXR162245
Low Voltage 16-Bit Bidirectional Transceiver
with 5V Tolerant Inputs/Outputs
and 26G58 Series Resistors in the Outputs
General Description
The LCXR162245 contains sixteen non-inverting bidirec-
tional buffers with 3-STATE outputs and is intended for bus
oriented applications. The device is designed for low volt-
age (2.5V or 3.3V) V
CC
applications with capability of inter-
facing to a 5V signal environment. The device is byte
controlled. Each byte has separate control inputs which
could be shorted together for full 16-bit operation. The T/R
inputs determine the direction of data flow through the
device. The OE inputs disable both the A and B ports by
placing them in a high impedance state.
In addition, all A and B outputs include equivalent 26c58
(nominal) series resistors to reduce overshoot and under-
shoot and are designed to sink/source up to 12 mA at
V
CC
c32 3.0V.
The LCXR162245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Features
a73 5V tolerant inputs and outputs
a73 2.3V–3.6V V
CC
specifications provided
a73 A and B side outputs have equivalent 26c58 series
resistors
a73 5.3 ns t
PD
max (V
CC
c32 3.3V), 20 c80A I
CC
max
a73 Power down high impedance inputs and outputs
a73 Supports live insertion/withdrawal (Note 1)
a73 Flow through pinout
a73 Implements patented noise/EMI reduction circuitry
a73 Latch-up performance exceeds 500 mA
a73 ESD performance:
Human body model c33 2000V
Machine model c33 200V
Note 1: To ensure the high-impedance state during power up or down OE
should be tied to V
CC
through a pull-up resistor: the minimum value or 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.
Logic Symbol Pin Descriptions
Order Number Package Number Package Description
74LCXR162245MEA MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
[RAIL]
74LCXR162245MEX MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
[TAPE and REEL]
74LCXR162245MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
[RAIL]
74LCXR162245MTX MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
[TAPE and REEL]
Pin Names Description
OE
n
Output Enable Input
T/R
n
Transmit/Receive Input
A
0
–A
15
Side A Inputs or 3-STATE Outputs
B
0
–B
15
Side B Inputs or 3-STATE Outputs