© 2005 Fairchild Semiconductor Corporation DS012404 www.fairchildsemi.com
March 1995
Revised March 2005
7
4LCX541 Low
V
o
lt
age
Oct
a
l
Buf
f
er
/Li
ne Dr
iver
wi
th
5V T
o
l
e
rant
I
nput
s
and
O
u
tput
s
74LCX541
Low Voltage Octal Buffer/Line Driver
with 5V Tolerant Inputs and Outputs
General Description
The LCX541 is an octal buffer/line driver designed to be
employed as memory and address drivers, clock drivers
and bus oriented transmitter/receivers. The LCX541 is a
non inverting option of the LCX540.
This device is similar in function to the LCX244 while pro-
viding flow-through architecture (inputs on opposite side
from outputs). This pinout arrangement makes this device
especially useful as an output port for microprocessors,
allowing ease of layout and greater PC board density.
The LCX541 is designed for low voltage (2.5V or 3.3V) V
CC
applications with capability of interfacing to a 5V signal
environment. The LCX541 is fabricated with an advanced
CMOS technology to achieve high speed operation while
maintaining CMOS low power dissipation.
Features
a73 5V tolerant input and outputs
a73 2.3V–3.6V V
CC
specifications provided
a73 6.5 ns t
PD
max (V
CC
c32 3.3V), 10 c80A I
CC
max
a73 Power-down high impedance inputs and outputs
a73 Supports live insertion/withdrawal (Note 1)
a73 c11424 mA output drive (V
CC
c32 3.0V)
a73 Implements patented noise/ EMI reduction circuitry
a73 Latch-up performance exceeds JEDEC 78 conditions
a73 ESD performance:
Human body model c33 2000V
Machine model c33 200V
a73 Leadless Pb-Free DQFN package
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.
Pb-Free package per JEDED J-STD-020B.
Note 2: DQFN package available in Tape and Reel only.
Note 3: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.
Order Number
Package
Package Description
Number
74LCX541WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LCX541SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCX541BQX
(Preliminary)
(Note 2)
MLP020B Pb-Free 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC
MO-241, 2.5 x 4.5mm
74LCX541MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
74LCX541MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74LCX541MTC_NL
(Note 3)
MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide