TL/F/11993
74LCX240
Low-Voltage
Octal
Buffer/Line
Driver
with
5V
Tolerant
Inputs
and
Outputs
December 1996
74LCX240
Low-Voltage Octal Buffer/Line Driver
with 5V Tolerant Inputs and Outputs
General Description
The LCX240 is an inverting octal buffer and line driver de-
signed to be employed as a memory address driver, clock
driver and bus oriented transmitter or receiver. The device is
designed for low voltage (3.3V) V
CC
applications with capa-
bility of interfacing to a 5V signal environment.
The LCX240 is fabricated with an advanced CMOS technol-
ogy to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
Y
5V tolerant inputs and outputs
Y
6.5 ns t
PD
max, 10 mAI
CCQ
max
Y
Power-down high impedance inputs and outputs
Y
Supports live insertion/withdrawal
Y
2.0V–3.6V V
CC
supply operation
Y
g24 mA output drive
Y
Implements patented Quiet Series
TM
noise/EMI
reduction circuitry
Y
Functionally compatible with the 74 series 240
Y
Latch-up performance exceeds 500 mA
Y
ESD performance:
Human Body Model
l
2000V
Machine Model
l
200V
Logic Symbol
IEEE/IEC
TL/F/11993–1
Connection Diagram
Pin Assignment
for SOIC, SSOP and TSSOP
TL/F/11993–2
Pin Names Description
OE
1
,OE
2
TRI-STATE Output Enable Inputs
I
0
–I
7
Inputs
O
0
–O
7
Outputs
Truth Tables
Inputs
(Pins 12, 14, 16, 18)
Outputs
OE
1
I
n
LL H
LH L
HX Z
Inputs
Outputs
OE
2
I
n
(Pins 3, 5, 7, 9)
LL H
LH L
HX Z
HeHIGH Voltage Level L e LOW Voltage Level X e Immaterial Z e High Impedance
SOIC JEDEC SOIC EIAJ SSOP Type II TSSOP
Order Number 74LCX240WM 74LCX240SJ 74LCX240MSA 74LCX240MTC
74LCX240WMX 74LCX240SJX 74LCX240MSAX 74LCX240MTCX
See NS Package Number M20B M20D MSA20 MTC20
TRI-STATE is a registered trademark of National Semiconductor Corporation.
Quiet SeriesTM is a trademark of National Semiconductor Corporation.
C
1996 National Semiconductor Corporation RRD-B30M17/Printed in U. S. A. http://www.national.com