54LCX16244 Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs General Description Features 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. 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 54LCX16244 Low Voltage 16-Bit Buffer/Line Driver with 5V Tolerant Inputs and Outputs April 1999 Pin Descriptions Functional Description Pin Names 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. Description OEn Output Enable Input (Active Low) I0–I15 Inputs O0–O15 Outputs Truth Tables Inputs Outputs Inputs Outputs OE1 I0–I3 O0–O3 OE2 I4–I7 L L L L L L L H H L H H H X Z H X Z I12–I15 O12–O15 Inputs OE3 Outputs I8–I11 Inputs O8–O11 OE4 O4–O7 Outputs L L L L L L L H H L H H H X Z H X Z H = High Voltage Level L = Low Voltage Level X = Immaterial Z = High Impedance Logic Diagram DS101059-3 www.national.com 2 Absolute Maximum Ratings (Note 1) Recommended Operating Conditions (Note 2) 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) 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 −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 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 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. ± 50mA ± 400mA Note 2: IO Absolute Maximum Rating must be observed. −65˚C to +150˚C 750mW 175˚C DC Electrical Characteristics Symbol Parameter Conditions VCC TA = −55˚C to +125˚C (V) Min 2.0 VIH HIGH Level Input Voltage 2.7–3.6 VIL LOW Level Input Voltage 2.7–3.6 VOH HIGH Level Output Voltage VOL LOW Level Output Voltage Units Max V 0.8 V IOH = −100 µA IOH = −12 mA IOH = −12 mA IOH = −24 mA 2.7–3.6 VCC − 0.2 V 2.7 2.2 V 3.0 2.4 V 3.0 2.2 IOL = 100 µA IOL = 12 mA 2.7–3.6 0.2 V 2.7 0.4 V V IOL = 24 mA 3.0 0.55 V VIC Negative Input Clamp Voltage IIN = -18mA 3.0 -1.2 V II Input Leakage Current 0 ≤ VI ≤ 5.5V 2.7–3.6 3-STATE Output Leakage 0 ≤ VO ≤ 5.5V VI = VIH or VIL 2.7–3.6 ± 5.0 ± 5.0 µA IOZ IOFF Power-Off Leakage Current Quiescent Supply Current VI or VO = 5.5V VI = VCC or GND µA ICC Increase in ICC per Input 3.6V ≤ VI, VO ≤ 5.5V VIH = VCC −0.6V ∆ICC 3 µA 0 10 2.7–3.6 20 µA 2.7–3.6 ± 20 µA 2.7–3.6 500 µA 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 Units Min Max Min Max tPHL Propagation Delay 0.5 5.5 1.0 6.0 tPLH Data to Output 0.5 5.5 1.0 6.0 tPZL Output Enable Time tPZH tPLZ Output Disable Time tPHZ tOSHL 0.5 6.5 1.0 7.0 0.5 6.5 1.0 7.0 1.0 6.0 1.0 6.0 1.0 6.0 1.0 6.0 Output to Output Skew (Note 3) 1.0 1.0 ns ns ns ns 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. Dynamic Switching Characteristics Symbol Parameter VOLP Quiet Output Dynamic Peak VOL VOLV Quiet Output Dynamic Valley VOL Conditions CL = 50 pF, VIH = 3.3V, VIL = 0V CL = 50 pF, VIH = 3.3V, VIL = 0V VCC (V) TA = 25˚C Units Max 3.3 1.2 V 3.3 -1.1 V Capacitance Symbol Parameter CIN Input Capacitance COUT Output Capacitance CPD Power Dissipation Capacitance www.national.com Conditions VCC = Open, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC, f = 10 MHz 4 Max Units 10 pF 12 pF 40 pF 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. 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