54LCX16244W-QML Datasheet

Low Voltage 16-bit Buffer/line Driver With 5v Tolerant Inputs And Outputs


Features, Applications
54LCX16244 Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs

The LCX16244 contains sixteen non-inverting buffers with TRI-STATE � outputs designed to be employed as a memory and address driver, clock driver, or bus oriented transmitter/ receiver. The device is nibble controlled. Each nibble has separate TRI-STATE control inputs which can be shorted together for full 16-bit operation. The LCX16244 is designed for low voltage (3.3V) VCC applications with capability of interfacing a 5V signal environment. The LCX16244 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation.


5V tolerant inputs and outputs Power down high impedance inputs and outputs Supports live insertion/withdrawal 2.0V�3.6V VCC supply operation 24 mA output drive Implements patented noise/EMI reduction circuitry Functionally compatible with 54 series 16244 ESD performance: Human body model > 2000V Machine model 200V n Standard Microcircuit Drawing (SMD) 5962-9950501

Order Number 54LCX16244W-QML Package Number WA48A Package Description 48-Lead Cerpack Package
TRI-STATE is a registered trademark of National Semiconductor Corporation.
Pin Names OEn I0�I15 O0�O15 Inputs Outputs Description Output Enable Input (Active Low)

The LCX16244 contains sixteen non-inverting buffers with TRI-STATE standard outputs. The device is nibble (4 bits) controlled with each nibble functioning identically, but independent of the other. The control pins can be shorted together to obtain full 16-bit operation. The TRI-STATE outputs are controlled by an Output Enable (OEn) input for each nibble. When OEn is LOW, the outputs are in bi-state mode. When OEn is HIGH, the outputs are in the high impedance mode, but this does not interfere with entering new data into the inputs.

H = High Voltage Level L = Low Voltage Level X = Immaterial Z = High Impedance

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Voltage (VI) DC Input Diode Current (IIK) VI < GND DC Output Diode Current (IOK) VO < GND VO VCC DC Output Voltage (VO) (Note 2) Output in High or Low State Output in TRI-STATE DC Output Source or Sink Current (IO) DC VCC or Ground Current Storage Temperature Range (TSTG) Power Dissapation Junction Temperature (TJ) -0.5V to VCC to 7.0V

Supply Voltage (VCC) Operating Data Retention Input Voltage (VI) Output Voltage (VO) High or Low State TRI-STATE Operating Temperature (TA) Minimum Input Edge Rate (t/V) VIN from to 2.0V, VCC 0V to VCC to 10ns/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: IO Absolute Maximum Rating must be observed.

Symbol VIH VIL VOH Parameter HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage IOH -100 �A IOH -12 mA IOH -12 mA IOH -24 mA IOL 100 �A IOL 12 mA IOL 24 mA VIC II IOZ IOFF ICC Negative Input Clamp Voltage Input Leakage Current 3-STATE Output Leakage Power-Off Leakage Current Quiescent Supply Current Increase in ICC per Input IIN VI = VIH or VIL VI = VCC or GND 3.6V VI, VO 5.5V VIH = VCC -0.6V Conditions VCC (V) VCC to +125�C Min 2.0 0.8 Max �A Units



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