SL74HCT14 Hex Schmitt-Trigger Inverter High-Performance Silicon-Gate CMOS The SL74HCT14 may be used as a level converter for interfacing TTL or NMOS outputs to high-speed CMOS inputs. The SL74HCT14 is identical in pinout to the LS/ALS14. The SL74HCT14 is useful to “square up” slow input rise and fall times. Due to the hysteresis voltage of the Schmitt trigger, the SL74HCT14 finds applications in noisy environments. • TTL/NMOS-Compatible Input Levels. • Outputs Directly Inferface to CMOS, NMOS and TTL. • Operating Voltage Range: 4.5 to 5.5 V • Low Input Current: 1.0 µA ORDERING INFORMATION SL74HCT14N Plastic SL74HCT14D SOIC TA = -55° to 125° C for all packages LOGIC DIAGRAM PIN ASSIGNMENT FUNCTION TABLE PIN 14 =VCC PIN 7 = GND SLS System Logic Semiconductor Inputs Output A Y L H H L SL74HCT14 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 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 IOUT 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 Parameter DC Supply Voltage (Referenced to GND) VIN, VOUT * DC Input Voltage, Output Voltage (Referenced to GND) TA Operating Temperature, All Package Types tr, t f Input Rise and Fall Time (Figure 1) Min Max Unit 4.5 5.5 V 0 VCC V -55 +125 °C 0 No Limit* ns When VIN ≈ 50% VCC ,ICC>1.0 mA. 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. SLS System Logic Semiconductor SL74HCT14 DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND) VCC Symbol Parameter Test Conditions Guaranteed Limit V 25 °C to -55°C ≤85 °C ≤125 °C Unit VT+max Maximum PositiveGoing Input Threshold Voltage VOUT=0.1 V IOUT ≤ 20 µA 4.5 5.5 1.9 2.1 1.9 2.1 1.9 2.1 V VT+min Minimum PositiveGoing Input Threshold Voltage VOUT=0.1 V IOUT ≤ 20 µA 4.5 5.5 1.2 1.4 1.2 1.4 1.2 1.4 V VT-max Maximum NegativeGoing Input Threshold Voltage VOUT=VCC -0.1 V IOUT≤ 20 µA 4.5 5.5 1.2 1.4 1.2 1.4 1.2 1.4 V VT-min Minimum NegativeGoing Input Threshold Voltage VOUT=VCC-0.1 V IOUT≤ 20 µA 4.5 5.5 0.5 0.6 0.5 0.6 0.5 0.6 V VHmax Note 1 Maximum Hysteresis Voltage VOUT=0.1 V or VCC-0.1V IOUT≤ 20 µA 4.5 5.5 1.4 1.5 1.4 1.5 1.4 1.5 V VHmin Note 1 Minimum Hysteresis Voltage VOUT=0.1 V or VCC-0.1V IOUT≤ 20 µA 4.5 5.5 0.4 0.4 0.4 0.4 0.4 0.4 V VOH Minimum High-Level Output Voltage VIN≤VT -min IOUT ≤ 20 µA 4.5 5.5 4.4 5.4 4.4 5.4 4.4 5.4 V VIN≤VT -min IOUT≤4mA 4.5 3.98 3.84 3.7 VIN≥VT +max IOUT ≤ 20 µA 4.5 5.5 0.1 0.1 0.1 0.1 0.1 0.1 VIN≥VT +max IOUT≤ 4mA 4.5 0.26 0.33 0.4 VOL Maximum Low-Level Output Voltage V IIN Maximum Input Leakage Current VIN=VCC or GND 5.5 ±0.1 ±1.0 ±1.0 µA ICC Maximum Quiescent Supply Current (per Package) VIN=VCC or GND IOUT=0µA 5.5 1.0 10 40 µA ∆ICC Additional Quiescent Supply Current VIN=2.4 V, Any One Input VIN=VCC or GND, Other Inputs IOUT=0 µA Note: 1 VHmin>(VT+min)-(VT-max); VHmax=(VT+max)-(VT-min) SLS System Logic Semiconductor 5.5 ≥-55° C 25°C to 125 °C 2.9 2.4 mA SL74HCT14 AC ELECTRICAL CHARACTERISTICS (VCC=5.0 V ± 10%, CL=50pF,Input t r=t f=6.0 ns) Temperature Limits Symbol Parameter 25 °C to -55°C ≤85°C ≤125°C Unit tPLH, t PHL Maximum Propagation Delay, Input A or B to Output Y (L to H) (Figures 1 and 2) 32 40 48 ns tTLH, t THL Maximum Output Transition Time, Any Output (Figures 1 and 2) 15 19 22 ns Maximum Input Capacitance 10 10 10 pF CIN Power Dissipation Capacitance (Per Inverter) CPD Used to determine the no-load dynamic power consumption: PD=CPDVCC2f+ICCVCC Figure 1. Switching Waveforms Typical @25°C,VCC=5.0 V 32 pF Figure 2. Test Circuit SLS System Logic Semiconductor