Low Voltage 16-Bit Buffer/Line Driver

www.DataSheet4U.com 54LCX16244 Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs April 1999 54LCX16244 Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description 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 to a 5V signal environment. The LCX16244 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation. Features n n n n n n n n 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 Ordering Code Order Number 54LCX16244W-QML Package Number WA48A Package Description 48-Lead Cerpack Package Logic Symbol Connection Diagram Pin Assignment for Cerpack DS101059-1 DS101059-2 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS101059 www.national.com Pin Descriptions Pin Names OEn I0–I15 O0–O15 Inputs Outputs Description Output Enable Input (Active Low) Functional Description 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. Truth Tables Inputs OE1 L L H Inputs OE3 L L H H = High Voltage Level L = Low Voltage Level X = Immaterial Z = High Impedance Outputs I0–I3 L H X O0–O3 L H Z Outputs I8–I11 L H X O8–O11 L H Z OE4 L L H OE2 L L H Inputs I4–I7 L H X Inputs I12–I15 L H X Outputs O4–O7 L H Z Outputs O12–O15 L H Z Logic Diagram DS101059-3 www.national.com 2 Absolute Maximum Ratings (Note 1) 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 +7.0V −0.5V to +7.0V −50 mA −50mA +50mA -0.5V to VCC + 0.5V -0.5V to 7.0V Recommended Operating Conditions (Note 2) 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 0.8V to 2.0V, VCC = 3.0V 2.0V to 3.6V 1.5V to 3.6V 0V to 5.5V 0V to VCC 0V to 5.5V −55˚C to +125˚C 0ns/V to 10ns/V ± 50mA ± 400mA −65˚C to +150˚C 750mW 175˚C 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. DC Electrical Characteristics Symbol VIH VIL VOH Parameter HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage IOH = −100 µA IOH = −12 mA IOH = −12 mA IOH = −24 mA IOL = 100 µA IOL = 12 mA IOL = 24 mA VIC II IOZ IOFF ICC ∆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 = -18mA 0 ≤ VI ≤ 5.5V 0 ≤ VO ≤ 5.5V VI = VIH or VIL VI or VO = 5.5V VI = VCC or GND 3.6V ≤ VI, VO ≤ 5.5V VIH = VCC −0.6V Conditions VCC (V) 2.7–3.6 2.7–3.6 2.7–3.6 2.7 3.0 3.0 2.7–3.6 2.7 3.0 3.0 2.7–3.6 2.7–3.6 0 2.7–3.6 2.7–3.6 2.7–3.6 VCC − 0.2 2.2 2.4 2.2 0.2 0.4 0.55 -1.2 TA = −55˚C to +125˚C Min 2.0 0.8 Max V V V V V V V V V V µA µA µA µA µA µA Units VOL LOW Level Output Voltage ± 5.0 ± 5.0 10 20 ± 20 500 3 www.national.com AC Electrical Characteristics Symbol Parameter TA = −55˚C to +125˚C, CL = 50pF, RL = 500 Ω VCC = 3.3V ± 0.3V VCC = 2.7V Min tPHL tPLH tPZL tPZH tPLZ tPHZ tOSHL tOSLH Note 3: 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). Parameter guaranteed by design. Units Max 6.0 6.0 7.0 7.0 6.0 6.0 1.0 ns ns ns ns Max 5.5 5.5 6.5 6.5 6.0 6.0 1.0 Min 1.0 1.0 1.0 1.0 1.0 1.0 Propagation Delay Data to Output Output Enable Time Output Disable Time Output to Output Skew (Note 3) 0.5 0.5 0.5 0.5 1.0 1.0 Dynamic Switching Characteristics Symbol VOLP VOLV Parameter Quiet Output Dynamic Peak VOL Quiet Output Dynamic Valley VOL Conditions CL = 50 pF, VIH = 3.3V, VIL = 0V CL = 50 pF, VIH = 3.3V, VIL = 0V VCC (V) 3.3 3.3 TA = 25˚C Max 1.2 -1.1 V V Units Capacitance Symbol CIN COUT CPD Parameter Input Capacitance Output Capacitance Power Dissipation Capacitance Conditions VCC = Open, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC, f = 10 MHz Max 10 12 40 Units pF pF pF www.national.com 4 54LCX16244 Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs Physical Dimensions inches (millimeters) unless otherwise noted 48-Lead Cerpack Package Number WA48A LIFE SUPPORT POLICY NATIONAL’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 NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 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 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. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 2. A critical component is 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. 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