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74LCX14 Low Voltage Hex Inverter with 5V Tolerant Schmitt Trigger Inputs
March 1995 Revised January 2001
74LCX14 Low Voltage Hex Inverter with 5V Tolerant Schmitt Trigger Inputs
General Description
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. 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. 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.
Features
s 5V tolerant inputs s 2.3V-3.6V VCC specifications provided s 6.5 ns tPD max (VCC = 3.3V), 10 A ICC max s Power down high impedance inputs and outputs s 24 mA output drive (VCC = 3.0V) s Implements patented noise/EMI reduction circuitry s Latch-up performance exceeds 500 mA s ESD performance: Machine model > 2000V Human model > 200V
Ordering Code:
Order Number 74LCX14M 74LCX14SJ 74LCX14MTC Package Number M14A M14D 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.
Logic Symbol
IEEE/IEC
Connection Diagram
Truth Table Pin Descriptions
Pin Names In On Description Inputs Outputs Input A L H Output O H L
(c) 2001 Fairchild Semiconductor Corporation
DS012412
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74LCX14
Absolute Maximum Ratings(Note 1)
Symbol VCC VI VO IIK IOK IO ICC IGND TSTG Parameter Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source/Sink Current DC Supply Current per Supply Pin DC Ground Current per Ground Pin Storage Temperature Value Conditions Units V V Output in HIGH or LOW State (Note 2) VI < GND VO < GND VO > VCC V mA mA mA mA mA
-0.5 to +7.0 -0.5 to +7.0 -0.5 to VCC + 0.5 -50 -50 +50 50 100 100 -65 to +150
C
Recommended Operating Conditions (Note 3)
Symbol VCC VI VO IOH/IOL Supply Voltage Input Voltage Output Voltage Output Current HIGH or LOW State VCC = 3.0V - 3.6V VCC = 2.7V - 3.0V VCC = 2.3V - 2.7V Parameter Operating Data Retention Min 2.0 1.5 0 0 Max 3.6 3.6 5.5 VCC Units V V V mA
24 12 8
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 Positive Input Threshold Negative Input Threshold Hysteresis HIGH Level Output Voltage IOH = -100A IOH = -8 mA IOH = -12 mA IOH = -18 mA IOH = -24 mA VOL LOW Level Output Voltage IOL = 100A IOL = 8mA IOL = 12 mA IOL = 16 mA IOL = 24 mA II IOFF ICC ICC Input Leakage Current Power-Off Leakage Current Quiescent Supply Current Increase in ICC per Input 0 VI 5.5V VI or VO = 5.5V VI = VCC or GND 3.6V VI 5.5V VIH = VCC -0.6V Conditions VCC (V) 2.5 3.0 2.5 3.0 2.5 3.0 2.3 - 3.6 2.3 2.7 3.0 3.0 2.3 - 3.6 2.3 2.7 3.0 3.0 2.3 - 3.6 0 2.3 - 3.6 2.3 - 3.6 2.3 - 3.6 TA = -40C to +85C Min 0.9 1.2 0.4 0.6 0.3 0.4 VCC - 0.2 1.8 2.2 2.4 2.2 0.2 0.6 0.4 0.4 0.55 5.0 10 10 10 500 A A A A V V Max 1.7 2.2 1.1 1.5 1.0 1.2 Units V V V
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74LCX14
AC Electrical Characteristics
TA = -40C to +85C, RL = 500 Symbol Parameter VCC = 3.3V 0.3V CL= 50 pF Min tPHL tPLH tOSHL tOSLH Output to Output Skew (Note 4) Propagation Delay Time 1.5 1.5 Max 6.5 6.5 1.0 1.0 VCC = 2.7V CL = 50 pF Min 1.5 1.5 Max 7.5 7.5 VCC = 2.5V 0.2V CL = 30 pF Min 1.5 1.5 Max 7.8 7.8 ns ns Units
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 Parameter Quiet Output Dynamic Peak VOL Quiet Output Dynamic Valley VOL Conditions CL = 50 pF, VIH =3.3V, VIL = 0V CL = 30 pF, VIH = 2.5V, VIL = 0V CL = 50 pF, VIH = 3.3V, VIL = 0V CL = 30 pF, VIH =2.5V, VIL = 0V VCC (V) 3.3 2.5 3.3 2.5 TA = 25C Typical 0.8 0.6 -0.8 -0.6 Units V V
Capacitance
Symbol CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance Parameter Conditions VCC = Open, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC, f = 10 MHz Typical 7 8 25 Units pF pF pF
3
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74LCX14
AC Loading and Waveforms Generic for LCX Family
FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance) Test tPLH, tPHL tPZL, tPLZ tPZH,tPHZ Switch Open 6V at VCC = 3.3 0.3V VCC x 2 at VCC = 2.5 0.2V 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 FIGURE 2. Waveforms
trise and tfall
(Input Pulse Characteristics; f = 1MHz, tr = tf = 3ns) VCC Symbol Vmi Vmo Vx Vy 3.3V 0.3V 1.5V 1.5V VOL + 0.3V VOH - 0.3V 2.7V 1.5V 1.5V VOL + 0.3V VOH - 0.3V 2.5V 0.2V VCC/2 VCC/2 VOL + 0.15V VOH - 0.15V
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74LCX14
Schematic Diagram Generic for LCX Family
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74LCX14
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M14A
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74LCX14
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M14D
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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. 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: 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 8 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. www.fairchildsemi.com

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