ETC 74LCX2244SJX

Revised March 2001
74LCX2244
Low Voltage Buffer/Line Driver with 5V Tolerant Inputs
and Outputs with 26Ω Series Resistors in the Outputs
General Description
Features
The LCX2244 contains eight non-inverting buffers with
3-STATE outputs. The device may be employed as a memory address driver, clock driver and bus-oriented transmitter/receiver. The LCX2244 is designed for low voltage
(2.5V or 3.3V) VCC applications with capability of interfacing to a 5V signal environment. The 26Ω series resistors
help reduce output overshoot and undershoot.
■ 5V tolerant inputs and outputs
The LCX2244 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining
CMOS low power dissipation.
■ ±12 mA output drive (VCC = 3.0V)
■ 2.3V–3.6V VCC specifications provided
■ 7.5 ns tPD max (VCC = 3.3V) 10 µA ICC max
■ Power down high impedance inputs and outputs
■ 26Ω-series resistors in the outputs
■ Supports live insertion/withdrawal (Note 1)
■ Implements patented noise/EMI reduction circuitry
■ Latch-up performance exceeds 500 mA
■ ESD performance:
Human body model > 2000V
Machine model > 200V
Note 1: To ensure the high-impedance state during power up or down, OE
should be tied to VCC through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number
Package Number
74LCX2244WM
74LCX2244SJ
M20B
M20D
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCX2244MSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74LCX2244MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
IEEE/IEC
© 2001 Fairchild Semiconductor Corporation
DS012569
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74LCX2244 Low Voltage Buffer/Line Driver with 5V Tolerant Inputs and Outputs with 26Ω Series Resistors in the
Outputs
October 1995
74LCX2244
Pin Descriptions
Pin Names
Description
OE1, OE2
3-STATE Output Enable Inputs
I0–I7
Inputs
O0–O7
Outputs
Truth Tables
Inputs
Outputs
In
OE1
(Pins 12, 14, 16, 18)
L
L
L
L
H
H
H
X
Z
Inputs
Outputs
OE2
In
L
H
L
L
H
H
H
X
Z
(Pins 3, 5, 7, 9)
H = HIGH Voltage Level
X = Immaterial
L = LOW Voltage Level
Z = High Impedance
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2
Symbol
Parameter
Value
Conditions
VCC
Supply Voltage
−0.5 to +7.0
VI
DC Input Voltage
−0.5 to +7.0
VO
DC Output Voltage
−0.5 to +7.0
Units
V
V
Output in 3-STATE
−0.5 to VCC + 0.5
V
Output in HIGH or LOW State (Note 3)
IIK
DC Input Diode Current
−50
VI < GND
IOK
DC Output Diode Current
−50
VO < GND
+50
VO > VCC
mA
mA
IO
DC Output Source/Sink Current
±50
mA
ICC
DC Supply Current per Supply Pin
±100
mA
IGND
DC Ground Current per Ground Pin
±100
mA
TSTG
Storage Temperature
−65 to +150
°C
Recommended Operating Conditions (Note 4)
Symbol
VCC
Parameter
VI
Input Voltage
VO
Output Voltage
IOH/IOL
Min
Max
Operating
2.0
3.6
Data Retention
1.5
3.6
Supply Voltage
0
5.5
HIGH or LOW State
0
VCC
3-STATE
0
5.5
Output Current
TA
Free-Air Operating Temperature
∆t/∆V
Input Edge Rate, VIN = 0.8V − 2.0V, VCC = 3.0V
VCC = 3.0V − 3.6V
±12
VCC = 2.7V − 3.0V
±8
VCC = 2.3V − 2.7V
±4
Units
V
V
V
mA
−40
85
°C
0
10
ns/V
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 Conditions” table will define the conditions for actual device operation.
Note 3: IO Absolute Maximum Rating must be observed.
Note 4: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
VIH
VIL
VOH
VOL
Parameter
Conditions
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
LOW Level Output Voltage
IOH = −100 µA
VCC
TA = −40°C to +85°C
(V)
Min
2.3 − 2.7
1.7
2.7 − 3.6
2.0
Max
V
2.3 − 2.7
0.7
2.7 − 3.6
0.8
2.3 − 3.6
VCC − 0.2
IOH = −4 mA
2.3
1.8
IOH = −4 mA
2.7
2.2
IOH = −6 mA
3.0
2.4
IOH = − 8mA
2.7
2.0
IOH = −12 mA
3.0
2.0
IOL = 100 µA
2.3 − 3.6
0.2
IOL = 4 mA
2.3
0.6
IOL = 4 mA
2.7
0.4
IOL = 6 mA
3.0
0.55
2.7
0.6
IOL = 12 mA
3.0
0.8
II
Input Leakage Current
0 ≤ VI ≤ 5.5V
2.3 − 3.6
±5.0
IOZ
3-STATE Output Leakage
0 ≤ VO ≤ 5.5V
2.3 − 3.6
±5.0
3
V
V
IOL = 8 mA
VI = V IH or VIL
Units
V
µA
µA
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74LCX2244
Absolute Maximum Ratings(Note 2)
74LCX2244
DC Electrical Characteristics
Symbol
Parameter
(Continued)
VCC
Conditions
TA = −40°C to +85°C
(V)
Min
IOFF
Power-Off Leakage Current
VI or VO = 5.5V
0
10
ICC
Quiescent Supply Current
VI = VCC or GND
2.3 − 3.6
10
3.6V ≤ VI, VO ≤ 5.5V (Note 5)
2.3 − 3.6
±10
VIH = VCC − 0.6V
2.3 − 3.6
500
∆ICC
Increase in ICC per Input
Units
Max
µA
µA
µA
Note 5: Outputs disabled or 3-STATE only.
AC Electrical Characteristics
TA = −40°C to +85°C, RL = 500Ω
Symbol
Parameter
VCC = 3.3V ± 0.3V
VCC = 2.7V
VCC = 2.5 ± 0.2V
CL = 50pF
CL = 50pF
CL = 30pF
Min
Max
Min
Max
Min
tPHL
Propagation Delay
1.5
7.5
1.5
8.5
1.5
9.0
tPLH
Data to Output
1.5
7.5
1.5
8.5
1.5
9.0
tPZL
Output Enable Time
1.5
9.0
1.5
10.0
1.5
10.5
1.5
9.0
1.5
10.0
1.5
10.5
tPZH
tPLZ
Output Disable Time
tPHZ
tOSHL
Max
1.5
7.0
1.5
8.0
1.5
8.4
1.5
7.0
1.5
8.0
1.5
8.4
Output to Output Skew (Note 6)
1.0
tOSLH
Units
ns
ns
ns
ns
1.0
Note 6: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH).
Dynamic Switching Characteristics
Symbol
VOLP
VOLV
Parameter
Quiet Output Dynamic Peak VOL
Quiet Output Dynamic Valley VOL
VCC
TA = 25°C
(V)
Typical
CL = 50 pF, VIH = 3.3V, VIL = 0V
3.3
0.35
CL = 30 pF, VIH = 2.5V, VIL = 0V
2.5
0.25
CL = 50 pF, VIH = 3.3V, VIL = 0V
3.3
−0.35
CL = 30 pF, VIH = 2.5V, VIL = 0V
2.5
−0.25
Conditions
Units
V
V
Capacitance
Typical
Units
CIN
Symbol
Input Capacitance
Parameter
VCC = Open, VI = 0V or VCC
7
pF
COUT
Output Capacitance
VCC = 3.3V, VI = 0V or VCC
8
pF
CPD
Power Dissipation Capacitance
VCC = 3.3V, VI = 0V or VCC, f = 10 MHz
25
pF
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Conditions
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74LCX2244
AC LOADING and WAVEFORMS Generic for LCX Family
FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance)
Test
Switch
tPLH, tPHL
Open
tPZL, tPLZ
6V at VCC = 3.3 ± 0.3V
VCC x 2 at VCC = 2.5 ± 0.2V
tPZH,tPHZ
GND
Waveform for Inverting and Non-Inverting Functions
3-STATE Output High Enable and
Disable Times for Logic
Propagation Delay. Pulse Width and trec Waveforms
Setup Time, Hold Time and Recovery Time for Logic
trise and tfall
3-STATE Output Low Enable and
Disable Times for Logic
FIGURE 2. Waveforms
(Input Characteristics; f =1MHz, tr = tf = 3ns)
Symbol
VCC
3.3V ± 0.3V
2.7V
2.5V ± 0.2V
Vmi
1.5V
1.5V
VCC/2
Vmo
1.5V
1.5V
VCC/2
Vx
VOL + 0.3V
VOL + 0.3V
VOL + 0.15V
Vy
VOH − 0.3V
VOH − 0.3V
VOH − 0.15V
5
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74LCX2244
Schematic Diagram Generic for LCX Family
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6
74LCX2244
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M20B
7
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74LCX2244
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
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8
74LCX2244
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
Package Number MSA20
9
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74LCX2244 Low Voltage Buffer/Line Driver with 5V Tolerant Inputs and Outputs with 26Ω Series Resistors in the
Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC20
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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