Revised February 2002 74LCX760 Low Voltage Buffer/Line Driver with 5V Tolerant Inputs and Open Drain Outputs General Description Features The LCX760 is the Open Drain version of the LCX244. The LCX760 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 LCX760 is designed for low voltage (2.5V or 3.3V) VCC applications with capability of interfacing to a 5V signal environment. ■ Open drain version of the LCX244 The LCX760 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation. ■ 5V tolerant inputs and outputs ■ 2.3V–3.6V VCC specifications provided ■ 8.0 ns tPD max (VCC = 3.3V), 10 µA ICC max ■ Power down high impedance inputs and outputs ■ Supports live insertion/withdrawal (Note 1) ■ 24 mA output drive (VCC = 3.0V) ■ Implements patented noise/EMI reduction circuitry ■ Latch-up conforms to JEDEC JED78 ■ ESD performance: Human body model > 2000V Machine model > 200V 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 74LCX760WM 74LCX760SJ M20B M20D Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 4.4mm Wide 74LCX760MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide 74LCX760MTC 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 the suffix letter “X” to the ordering code. Logic Symbol Connection Diagram IEEE/IEC © 2002 Fairchild Semiconductor Corporation DS500413 www.fairchildsemi.com 74LCX760 Low Voltage Buffer/Line Driver with 5V Tolerant Inputs and Open Drain Outputs July 2001 74LCX760 Pin Descriptions Pin Names Description OE1, OE2 3-STATE Output Enable Inputs I0–I7 Inputs O0–O7 Outputs Truth Tables Inputs OE1 Outputs In (Pins 12, 14, 16, 18) L L L L H H H X Z Inputs Outputs OE2 In L L L L H H H X Z (Pins 3, 5, 7, 9) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance www.fairchildsemi.com 2 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 IIK DC Input Diode Current −50 VI < GND IOK DC Output Diode Current −50 VO < GND +50 VO > VCC IO DC Output Sink Current ICC DC Supply Current per Supply Pin IGND DC Ground Current per Ground Pin TSTG Storage Temperature Units V V Output in HIGH or LOW State (Note 3) V mA mA 50 mA ±100 mA ±100 mA −65 to +150 °C Recommended Operating Conditions (Note 4) Symbol VCC Parameter Min Max Operating 2.0 3.6 Data Retention 1.5 3.6 Supply Voltage Units V VI Input Voltage 0 5.5 V VO Output Voltage 0 5.5 V IOL Output Current TA Free-Air Operating Temperature ∆t/∆V Input Edge Rate, VIN = 0.8V–2.0V, VCC = 3.0V VCC = 3.0V − 3.6V 24 VCC = 2.7V − 3.0V 12 VCC = 2.3V − 2.7V 8 mA −40 85 °C 0 10 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 or I/Os must be held HIGH or LOW. They may not float. DC Electrical Characteristics Symbol VIH VIL VOL Parameter Conditions HIGH Level Input Voltage LOW Level Input Voltage LOW Level Output Voltage IOL = 100 µA VCC TA = −40°C to +85°C (V) Min 2.3 − 2.7 1.7 2.7 − 3.6 2.0 Units Max V 2.3 − 2.7 0.7 2.7 − 3.6 0.8 2.3 − 3.6 0.2 IOL = 8 mA 2.3 0.6 IOL = 12 mA 2.7 0.4 IOL = 16 mA 3.0 0.4 V V IOL = 24 mA 3.0 0.55 II Input Leakage Current 0 ≤ VI ≤ 5.5V 2.3 − 3.6 ±5.0 µA IOZ 3-STATE Output Leakage 0 ≤ VO ≤ 5.5V 2.3 − 3.6 ±5.0 µA µA VI = V IH or VIL IOFF Power-Off Leakage Current VI or VO = 5.5V 0 10 ICC Quiescent Supply Current VI = V CC or GND 2.3 − 3.6 10 3.6V ≤ VI, VO ≤ 5.5V (Note 5) 2.3 − 3.6 ±10 2.3 − 3.6 500 µA 2 - 3.6 10 µA ∆ICC Increase in ICC per Input VIH = VCC −0.6V IOHZ Off State Current VO = 5.5 µA Note 5: Outputs disabled or 3-STATE only. 3 www.fairchildsemi.com 74LCX760 Absolute Maximum Ratings(Note 2) 74LCX760 AC Electrical Characteristics TA = −40°C to +85°C, RL = 500Ω Symbol Parameter VCC = 3.3V ± 0.3V VCC = 2.7V VCC = 2.5V ± 0.2 CL= 50 pF CL = 50 pF CL = 30 pF Units Min Max Min Max Min Max tPZL Propagation Delay 0.5 8.0 0.5 9.0 0.5 10.0 tPLZ Data to Output 0.5 7.0 0.5 8.0 0.5 8.4 tPZL Output Enable Time 0.5 8.0 0.5 9.0 0.5 10.0 ns 0.5 7.0 0.5 8.0 0.5 8.4 ns OEn to Out tPLZ Output Disable Time OEn to Out tOSHL Output to Output Skew 1.0 tOSLH (Note 6) 1.0 ns ns 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 VCC TA = 25°C (V) Typical CL = 50 pF, VIH = 3.3V, VIL = 0V 3.3 0.8 CL = 30 pF, VIH = 2.5V, VIL = 0V 2.5 0.6 CL = 50 pF, VIH = 3.3V, VIL = 0V 3.3 −0.8 CL = 30 pF, VIH = 2.5V, VIL = 0V 2.5 −0.6 Parameter Quiet Output Dynamic Peak VOL Quiet Output Dynamic Valley VOL Conditions Units V V Capacitance Typical Units CIN Symbol Input Capacitance Parameter VCC = Open, VI = 0V or VCC 7 pF COUT Output Capacitance VCC = 3.3V, VI = 0V or VCC 8 pF CPD Power Dissipation Capacitance VCC = 3.3V, VI = 0V or VCC, f = 10 MHz 10 pF www.fairchildsemi.com Conditions 4 74LCX760 AC LOADING and WAVEFORMS FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance) Test tPZL, tPLZ Switch 6V at VCC = 3.3 ± 0.3V VCC x 2 at VCC = 2.5 ± 0.2V 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 74LCX760 Schematic Diagram Generic for LCX Family (output pull-up circuitry is not applicable to open drain versions) FIGURE 3. www.fairchildsemi.com 6 74LCX760 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 74LCX760 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 4.4mm Wide Package Number M20D www.fairchildsemi.com 8 74LCX760 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide Package Number MSA20 9 www.fairchildsemi.com 74LCX760 Low Voltage Buffer/Line Driver with 5V Tolerant Inputs and Open Drain 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 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 www.fairchildsemi.com 10