Revised January 2001 74LCX14 Low Voltage Hex Inverter with 5V Tolerant Schmitt Trigger Inputs General Description Features The LCX14 contains six inverter gates each with a Schmitt trigger input. They are capable of transforming slowly changing input signals into sharply defined, jitter-free output signals. In addition, they have a greater noise margin than conventional inverters. ■ 5V tolerant inputs The LCX14 has hysteresis between the positive-going and negative-going input thresholds (typically 1.0V) which is determined internally by transistor ratios and is essentially insensitive to temperature and supply voltage variations. ■ ±24 mA output drive (VCC = 3.0V) The inputs tolerate voltages up to 7V allowing the interface of 5V, 3V and 2.5V systems. The 74LCX14 is fabricated with advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation. ■ 2.3V–3.6V VCC specifications provided ■ 6.5 ns tPD max (VCC = 3.3V), 10 µA ICC max ■ Power down high impedance inputs and outputs ■ Implements patented noise/EMI reduction circuitry ■ Latch-up performance exceeds 500 mA ■ ESD performance: Machine model > 2000V Human model > 200V Ordering Code: Order Number Package Number 74LCX14M M14A 74LCX14SJ M14D 74LCX14MTC MTC14 Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 14-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. Connection Diagram Logic Symbol IEEE/IEC Truth Table Pin Descriptions Input Output Pin Names Description A O In Inputs L H On Outputs H L © 2001 Fairchild Semiconductor Corporation DS012412 www.fairchildsemi.com 74LCX14 Low Voltage Hex Inverter with 5V Tolerant Schmitt Trigger Inputs March 1995 74LCX14 Absolute Maximum Ratings(Note 1) 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 IIK DC Input Diode Current −50 VI < GND IOK DC Output Diode Current −50 VO < GND +50 VO > VCC Units V V −0.5 to VCC + 0.5 Output in HIGH or LOW State (Note 2) V 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 3) Symbol VCC Parameter Supply Voltage Min Max Operating 2.0 3.6 Data Retention 1.5 3.6 VI Input Voltage VO Output Voltage HIGH or LOW State IOH/IOL Output Current VCC = 3.0V − 3.6V ±24 VCC = 2.7V − 3.0V ±12 VCC = 2.3V − 2.7V ±8 Units V 0 5.5 V 0 VCC V mA 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. Note 3: Unused inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics Symbol Vt+ Vt− VH VOH Parameter Conditions Positive Input Threshold Negative Input Threshold Hysteresis HIGH Level Output Voltage IOH = −100µA LOW Level Output Voltage (V) TA = −40°C to +85°C Min Max 2.5 0.9 1.7 3.0 1.2 2.2 2.5 0.4 1.1 3.0 0.6 1.5 2.5 0.3 1.0 3.0 0.4 1.2 2.3 − 3.6 VCC - 0.2 IOH = -8 mA 2.3 1.8 IOH = −12 mA 2.7 2.2 IOH = −18 mA 3.0 2.4 3.0 2.2 IOH = −24 mA VOL VCC IOL = 100µA 2.3 − 3.6 Units V V V V 0.2 IOL = 8mA 2.3 0.6 IOL = 12 mA 2.7 0.4 IOL = 16 mA 3.0 0.4 V IOL = 24 mA 3.0 0.55 II Input Leakage Current 0 ≤ VI ≤ 5.5V 2.3 − 3.6 ±5.0 µA IOFF Power-Off Leakage Current VI or VO = 5.5V 0 10 µA ICC Quiescent Supply Current VI = VCC or GND 2.3 − 3.6 10 3.6V ≤ VI ≤ 5.5V 2.3 − 3.6 ±10 VIH = VCC −0.6V 2.3 − 3.6 500 ∆ICC Increase in ICC per Input www.fairchildsemi.com 2 µA µA TA = −40°C to +85°C, RL = 500 Ω Symbol tPHL Parameter Propagation Delay Time tPLH VCC = 3.3V ± 0.3V VCC = 2.7V VCC = 2.5V ± 0.2V CL= 50 pF CL = 50 pF CL = 30 pF Min Max Min Max Min 1.5 6.5 1.5 7.5 1.5 7.8 1.5 6.5 1.5 7.5 1.5 7.8 tOSHL Output to Output Skew 1.0 tOSLH (Note 4) 1.0 Units Max ns ns Note 4: 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 Conditions 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 25 pF 3 www.fairchildsemi.com 74LCX14 AC Electrical Characteristics 74LCX14 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 Low Enable and Disable Times for Logic Propagation Delay, Pulse Width and trec Waveforms Setup Time, Hold TIme and Recovery TIme for Logic 3-STATE Output High Enable and Disable TImes for Logic trise and tfall FIGURE 2. Waveforms (Input Pulse Characteristics; f = 1MHz, tr = tf = 3ns) 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 Symbol www.fairchildsemi.com 4 74LCX14 Schematic Diagram Generic for LCX Family 5 www.fairchildsemi.com 74LCX14 Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M14A www.fairchildsemi.com 6 74LCX14 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M14D 7 www.fairchildsemi.com 74LCX14 Low Voltage Hex Inverter with 5V Tolerant Schmitt Trigger Inputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC14 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. 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