Fairchild Semiconductor 74LCX241WMX, 74LCX241WM, 74LCX241SJX, 74LCX241SJ, 74LCX241MTCX Datasheet
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August 1998
Revised April 1999
74LCX241 Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
© 1999 Fairchild Semiconductor Corporation DS012639.prf www.fairchildsemi.com
74LCX241
Low Voltage Octal Buffer/Line Driver with
5V Tolerant Inputs and Outputs
General Description
The LCX241 is an octal buffer and line dr iver designed to
be employed as a mem ory add re ss dr iver, clock drive r a nd
bus oriented transmitter or receiver. The device is designed
for low voltage (2.5V o r 3.3V) V
CC
applications with capability of interfacing to a 5V signal environment.
The LCX241 is fabrica ted with an advanced CMOS tech-
nology to achieve high spee d operation while mai ntaining
CMOS low power dissipation.
Features
■ 5V tolerant inputs and outputs
■ 2.3V – 3.6V V
CC
specifications provided
■ 6.5 ns t
PD
max (VCC = 3.3V), 10 µA ICC max
■ Power-down high impedance inputs and outputs
■ Supports live insertion/withdrawal (Note 1)
■ Implements patented noise/EMI reduction circuitry
■ Latch-up performance exceeds 500 mA
■ ESD performance:
Human Body Model > 200 0V
Machine Model > 200V
Note 1: To ensure the high-impedan c e state during power up or down, OE
should be tied to VCC and OE should be tied to GND through a resistor: the
minimum value or the resistor is deter mined b y the curr ent-sourc ing ca pability of the driver.
Ordering Code:
Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.
Connection Diagram Pin Descriptions
Order Number Package Number Package Description
74LCX241WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
74LCX241MSA M20D 20-Lead Small Outline Package (SOP), EIAJ Type II, 5.3mm Wide
74LCX241SJ MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm WIde
74LCX241MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names Description
OE
1
, OE23-STATE Output Enable Inputs
I
0–I7
Inputs
O
0–O7
Outputs
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74LCX241
Logic Symbol
Truth Tables
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Inputs
Outputs
(Pins 12, 14, 16, 18)
OE
1
I
n
LL L
LH H
HX Z
Inputs
Outputs
(Pins 3, 5, 7, 9)
OE
2
I
n
HH H
HL L
LX Z
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74LCX241
Absolute Maximum Ratings(Note 2)
Recommended Operating Conditions (Note 4)
Note 2: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated
at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recommended Operating C onditions” table will def ine the conditions for actual device operation.
Note 3: I
O
Absolute Maximum Rating must be observed.
Note 4: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol Parameter Value Conditions Units
V
CC
Supply Voltage −0.5 to +7.0 V
V
I
DC Input Voltage −0.5 to +7.0 V
V
O
DC Output Voltage −0.5 to +7.0 Output in 3-STATE
V
−0.5 to V
CC
+0.5 Output in HIGH or LOW State (Note 3)
I
IK
DC Input Diode Current −50 VI< GND mA
I
OK
DC Output Diode Current −50 VO< GND
mA
+50 V
O
< V
CC
I
O
DC Output Source/Sink Current ±50 mA
I
CC
DC Supply Current per Supply Pin ±100 mA
I
GND
DC Ground Current per Ground Pin ±100 mA
T
STG
Storage Temperature −65 to +150 °C
Symbol Parameter Min Max Units
V
CC
Supply Voltage Operating 2.0 3.6
V
Data Retention 1.5 3.6
V
I
Input Voltage 0 5.5 V
V
O
Output Voltage HIGH or LOW State 0 V
CC
V
3-STATE 0 5.5
I
OH/IOL
Output Current V
CC
= 3.0V − 3.6V ±24
mAV
CC
= 2.7V − 3.0V ±12
V
CC
= 2.3V − 2.7V ±8
T
A
Free-Air Operating Temperature −40 85 °C
∆t/∆V Input Edge R ate, V
IN
= 0.8V−2.0V, VCC = 3.0V 0 10 ns/V
Symbol Parameter Conditions
V
CC
TA = −40°C to +85°C
Units
(V) Min Max
VIHHIGH Level Input Voltage 2.3 − 2.7 1.7
V
2.7 − 3.6 2.0
VILLOW Level Input Voltage 2.3 − 2.7 0.7
V
2.7 − 3.6 0.8
V
OH
HIGH Level Output Voltage IOH = −100µA2.3 − 3.6 VCC - 0.2
V
IOH = −8 mA 2.3 1.8
IOH = −12 mA 2.7 2.2
IOH = −18 mA 3.0 2.4
IOH = −24 mA 3.0 2.2
V
OL
LOW Level Output Voltage IOL = 100 µA2.3 − 3.6 0.2
V
IOL = 8 mA 2.3 0.6
IOL = 12 mA 2.7 0.4
IOL 16 mA 3.0 0.4
IOL = 24 mA 3.0 0.55
I
I
Input Leakage Current 0 ≤ VI ≤ 5.5V 2.3 - 3.6 ±5.0 µA
I
OZ
3-STATE Output Leakage 0 ≤ VO ≤ 5.5V
2.3 - 3.6 ±5.0 µA
VI = VIH or V
IL
I
OFF
Power-Off Leakage Current VI or VO = 5.5V 0 10 µA
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