Revised May 2003 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. ■ 2.3V to 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) ■ ±12 mA output drive (VCC = 3.0V) ■ Implements patented noise/EMI reduction circuitry ■ Latch-up performance exceeds 500 mA ■ ESD performance: Human body model > 2000V Machine model > 200V ■ Leadless DQFN package 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 Package Description 74LCX2244WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74LCX2244SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LCX2244BQ (Preliminary) MLP020B (Preliminary) 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 4.5mm 74LCX2244MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 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. © 2003 Fairchild Semiconductor Corporation DS012569 www.fairchildsemi.com 74LCX2244 Low Voltage Buffer/Line Driver with 5V Tolerant Inputs and Outputs with 26Ω Series Resistors in the Outputs October 1995 74LCX2244 Logic Symbol Pin Descriptions IEEE/IEC Pin Names Description OE1, OE2 3-STATE Output Enable Inputs I0–I7 Inputs O0–O7 Outputs Truth Tables Inputs OE1 Connection Diagrams Pin Assignments for SOIC, SOP, SSOP, and TSSOP In L L L H H H X Z OE2 In (Pins 3, 5, 7, 9) L H L L H H H X Z Inputs Pad Assignment for DQFN (Top Through View) 2 (Pins 12, 14, 16, 18) L H = HIGH Voltage Level X = Immaterial L = LOW Voltage Level Z = High Impedance www.fairchildsemi.com Outputs Outputs 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 0.0 5.5 HIGH or LOW State 0.0 VCC 3-STATE 0.0 5.5 Output Current TA Free-Air Operating Temperature ∆t/∆V Input Edge Rate, VIN = 0.8V − 2.0V, VCC = 3.0V Units V V V VCC = 3.0V − 3.6V ±12.0 VCC = 2.7V − 3.0V ±8.0 VCC = 2.3V − 2.7V ±4.0 mA −40.0 85.0 °C 0.0 10.0 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 www.fairchildsemi.com 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 0.0 10.0 ICC Quiescent Supply Current VI = VCC or GND 2.3 − 3.6 10.0 3.6V ≤ VI, VO ≤ 5.5V (Note 5) 2.3 − 3.6 ±10.0 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 7.0 pF COUT Output Capacitance VCC = 3.3V, VI = 0V or VCC 8.0 pF CPD Power Dissipation Capacitance VCC = 3.3V, VI = 0V or VCC, f = 10 MHz 25.0 pF www.fairchildsemi.com Conditions 4 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 www.fairchildsemi.com 74LCX2244 Schematic Diagram Generic for LCX Family www.fairchildsemi.com 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 www.fairchildsemi.com 74LCX2244 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D www.fairchildsemi.com 8 74LCX2244 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 4.5mm Package Number MLP020B (Preliminary) 9 www.fairchildsemi.com 74LCX2244 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package Number MSA20 www.fairchildsemi.com 10 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. www.fairchildsemi.com 11 www.fairchildsemi.com 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)