TECHNICAL DATA IN74HC14A Hex Schmitt-Trigger Inverter High-Performance Silicon-Gate CMOS The IN74HC14A is identical in pinout to the LS/ALS14, LS/ALS04. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL outputs. The IN74HC14A is useful to “square up” slow input rise and fall times. Due to the hysteresis voltage of the Schmitt trigger, the IN74HC14A finds applications in noisy environments. • • • • Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2.0 to 6.0 V Low Input Current: 1.0 µA High Noise Immunity Characteristic of CMOS Devices ORDERING INFORMATION IN74HC14AN Plastic IN74HC14AD SOIC TA = -55° to 125° C for all packages LOGIC DIAGRAM PIN ASSIGNMENT FUNCTION TABLE Inputs Output A Y L H H L PIN 14 =VCC PIN 7 = GND 55 IN74HC14A MAXIMUM RATINGS* Symbol Parameter Value Unit -0.5 to +7.0 V VCC DC Supply Voltage (Referenced to GND) VIN DC Input Voltage (Referenced to GND) -1.5 to VCC +1.5 V DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V DC Input Current, per Pin ±20 mA IOUT DC Output Current, per Pin ±25 mA ICC DC Supply Current, VCC and GND Pins ±50 mA PD Power Dissipation in Still Air, Plastic DIP+ SOIC Package+ 750 500 mW -65 to +150 °C 260 °C VOUT IIN Tstg TL Storage Temperature Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package) * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. +Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C SOIC Package: : - 7 mW/°C from 65° to 125°C RECOMMENDED OPERATING CONDITIONS Symbol VCC VIN, VOUT Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage, Output Voltage (Referenced to GND) TA Operating Temperature, All Package Types tr , tf Input Rise and Fall Time (Figure 1) Min Max Unit 2.0 6.0 V 0 VCC V -55 +125 °C - No Limit* ns * When VIN ≈50% VCC , ICC > 1mA This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, VIN and VOUT should be constrained to the range GND≤(VIN or VOUT)≤VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open. 56 IN74HC14A DC ELECTRICAL CHARACTERISTICS(Voltages Referenced to GND) VCC Guaranteed Limit V 25 °C to -55°C ≤85 °C ≤125 °C Unit VOUT=0.1 V IOUT ≤ 20 µA 2.0 4.5 6.0 1.5 3.15 4.2 1.5 3.15 4.2 1.5 3.15 4.2 V Minimum PositiveGoing Input Threshold Voltage VOUT=0.1 V IOUT ≤ 20 µA 2.0 4.5 6.0 1.0 2.3 3.0 0.95 2.25 2.95 0.95 2.25 2.95 V VT-max Maximum NegativeGoing Input Threshold Voltage VOUT=VCC -0.1 V IOUT≤ 20 µA 2.0 4.5 6.0 0.9 2.0 2.6 0.95 2.05 2.65 0.95 2.05 2.65 V VT-min Minimum NegativeGoing Input Threshold Voltage VOUT=VCC-0.1 V IOUT≤ 20 µA 2.0 4.5 6.0 0.3 0.9 1.2 0.3 0.9 1.2 0.3 0.9 1.2 V VHmax Note 1 Maximum Hysteresis Voltage VOUT=0.1 V or VCC-0.1 V IOUT≤ 20 µA 2.0 4.5 6.0 1.2 2.25 3.0 1.2 2.25 3.0 1.2 2.25 3.0 V VHmin Note 1 Minimum Hysteresis Voltage VOUT=0.1 V or VCC-0.1 V IOUT≤ 20 µA 2.0 4.5 6.5 0.2 0.4 0.5 0.2 0.4 0.5 0.2 0.4 0.5 V Minimum High-Level Output Voltage VIN≤VT -min IOUT ≤ 20 µA 2.0 4.5 6.0 1.9 4.4 5.9 1.9 4.4 5.9 1.9 4.4 5.9 V 4.5 6.0 3.98 5.48 3.84 5.34 3.7 5.2 2.0 4.5 6.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 VIN≥VT +max IOUT≤ 4mA IOUT≤5.2mA 4.5 6.0 0.26 0.26 0.33 0.33 0.4 0.4 Symbol Parameter VT+max Maximum PositiveGoing Input Threshold Voltage VT+min VOH Test Conditions VIN≤VT -min IOUT≤4mA IOUT≤5.2mA VOL Maximum Low-Level Output Voltage VIN≥VT +max IOUT ≤ 20 µA V IIN Maximum Input Leakage Current VIN=VCC or GND 6.0 ±0.1 ±1.0 ±1.0 µA ICC Maximum Quiescent Supply Current (per Package) VIN=VCC or GND IOUT=0µA 6.0 1.0 10 40 µA Note: 1 VHmin>(VT+min)-(VT-max); VHmax=(VT+max)-(VT-min) . 57 IN74HC14A AC ELECTRICAL CHARACTERISTICS(CL=50pF,Input tr=tf=6.0 ns) Guaranteed Limit VCC Symbol Parameter V 25 °C to -55°C ≤85°C ≤125°C Unit tPLH, tPHL Maximum Propagation Delay, Input A to Output Y (Figures 1 and 2) 2.0 4.5 6.0 95 19 16 120 24 20 145 29 25 ns tTLH, tTHL Maximum Output Transition Time, Any Output (Figures 1 and 2) 2.0 4.5 6.0 75 15 13 95 19 16 110 22 19 ns - 10 10 10 pF CIN CPD Maximum Input Capacitance Power Dissipation Capacitance (Per Inverter) Typical @25°C,VCC=5.0 V Used to determine the no-load dynamic power consumption: PD=CPDVCC2f+ICCVCC 22 Figure 1. Switching Waveforms 58 Figure 2. Test Circuit pF