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74LVX244 Low Voltage Octal Buffer/Line Driver with 3-STATE Outputs
February 1993 Revised March 1999
74LVX244 Low Voltage Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The LVX244 is an octal non-inverting buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter or receiver which provides improved PC board density. The inputs tolerate up to 7V allowing interface of 5V systems to 3V systems.
Features
s Input voltage translation from 5V to 3V s Ideal for low power/low noise 3.3V applications s Guaranteed simultaneous switching noise level and dynamic threshold performance
Ordering Code:
Order Number 74LVX244M 74LVX244SJ 74LVX244MTC Package Number M20B M20D MTC20 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 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
IEEE/IEC
Pin Descriptions
Pin Names OE1, OE2 I0-I7 O0-O7 Description 3-STATE Output Enable Inputs Inputs Outputs
Truth Tables
Inputs OE1 In L H X Inputs OE2 L L H
H = HIGH Voltage Level X = Immaterial
Outputs (Pins 12, 14, 16, 18) L H Z Outputs In L H X (Pins 3, 5, 7, 9) L H Z
L = LOW Voltage Level Z = High Impedance
Connection Diagram
L L H
(c) 1999 Fairchild Semiconductor Corporation
DS011552.prf
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74LVX244
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) DC Input Diode Current (IIK) VI = -0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = -0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current (ICC or IGND) Storage Temperature (TSTG) Power Dissipation 75 mA -65C to +150C 180 mW 25 mA -20 mA +20 mA -0.5V to VCC + 0.5V -20 mA -0.5V to 7V -0.5V to +7.0V
Recommended Operating Conditions (Note 2)
Supply Voltage (VCC) Input Voltage (VI) Output Voltage (Vo) Operating Temperature (TA) Input Rise and Fall Time (t/V) 2.0V to 3.6V 0V to 5.5V 0V to VCC -40C to +85C 0 ns/V to 100 ns/V
Note 1: 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 2: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol VIH Parameter HIGH Level Input Voltage VIL LOW Level Input Voltage VOH HIGH Level Output Voltage VOL LOW Level Output Voltage IOZ IIN ICC 3-STATE Output Off-State Current Input Leakage Current Quiescent Supply Current 3.6 3.6 0.1 4.0 1.0 40.0 A A VCC 2.0 3.0 3.6 2.0 3.0 3.6 2.0 3.0 3.0 2.0 3.0 3.0 3.6 1.9 2.9 2.58 0.0 0.0 0.1 0.1 0.36 0.25 2.0 3.0 TA = +25C Min 1.5 2.0 2.4 0.5 0.8 0.8 1.9 2.9 2.48 0.1 0.1 0.44 2.5 A VIN = VIH or VIL VOUT = VCC or GND VIN = 5.5V or GND VIN = VCC or GND V V Typ Max TA = -40C to +85C Min 1.5 2.0 2.4 0.5 0.8 0.8 VIN = VIH or VIL IOH = -50 A IOH = -50 A IOH = -4 mA VIN = VIH or VIL IOL = 50 A IOL = 50 A IOL = 4 mA V V Max Units Conditions
Noise Characteristics
Symbol VOLP VOLV VIHD VILD
(Note 3)
VCC (V) 3.3 3.3 3.3 3.3 TA = 25C Typ 0.5 -0.5 Limit 0.8 -0.8 2.0 0.8 V V V V Units CL (pF) 50 50 50 50
Parameter Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum LOW Level Dynamic Input Voltage
Note 3: Input tr = tf = 3 ns
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74LVX244
AC Electrical Characteristics
Symbol tPLH tPHL Parameter Propagation Delay Time 3.3 0.3 tPZL tPZH 3-STATE Output Enable Time 9.6 3.3 0.3 5.5 8.0 tPLZ tPHZ tOSLH tOSHL 3-STATE Output Disable Time Output to Output Skew (Note 4) 2.7 3.3 0.3 2.7 3.3 11.6 9.7 17.3 8.8 12.3 16.0 11.4 1.5 1.5 1.0 1.0 1.0 1.0 1.0 20.0 10.5 14.0 19.0 13.0 1.5 1.5 ns 2.7 VCC (V) 2.7 TA = +25C Min Typ 6.1 8.6 4.7 7.2 7.1 Max 11.4 14.9 7.1 10.6 13.8 TA = -40C to +85C Min 1.0 1.0 1.0 1.0 1.0 Max 13.5 17.0 8.5 12.0 16.5 ns Units Conditions CL = 15 pF CL = 50 pF CL = 15 pF CL = 50 pF CL = 15 pF, RL = 1 k CL = 50 pF, RL = 1 k CL = 15 pF, RL = 1 k CL = 50 pF, RL = 1 k ns ns CL = 50 pF, RL = 1 k CL = 50 pF
Note 4: Parameter guaranteed by design. tOSLH = |tPLHm - tPLHn|, tOSHL = |t PHLm - t PHLn|
Capacitance
Symbol CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance (Note 5) Parameter TA = +25C Min Typ 4 6 19 Max 10 TA =-40C to +85C Min Max 10 pF pF pF Units
Note 5: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
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74LVX244
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D
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74LVX244 Low Voltage Octal Buffer/Line Driver with 3-STATE 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 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 1. Life support devices or systems are devices or systems device or system whose failure to perform can be reawhich, (a) are intended for surgical implant into the sonably expected to cause the failure of the life support body, or (b) support or sustain life, and (c) whose failure device or system, or to affect its safety or effectiveness. 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 www.fairchildsemi.com user.
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.

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