SL74HCT20

SL74HCT20 Dual 4-Input NAND Gate High-Performance Silicon-Gate CMOS The SL74HCT20 is identical in pinout to the LS/ALS20. The SL74HCT20 may be used as a level converter for interfacing TTL or NMOS outputs to High-Speed CMOS inputs. • TTL/NMOS-Compatible Input Levels • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 4.5 to 5.5 V • Low Input Current: 1.0 µA • High Noise Immunity Characteristic of CMOS Devices ORDERING INFORMATION SL74HCT20N Plastic SL74HCT20D SOIC TA = -55° to 125° C for all packages LOGIC DIAGRAM PIN ASSIGNMENT NC = NO CONNECTION PIN 14 =VCC PIN 7 = GND PINS 3,11 = NO CONNECTION FUNCTION TABLE Inputs A L X X X H B X L X X H C X X L X H D X X X L H Output Y H H H H L X = don’t care SLS System Logic Semiconductor SL74HCT20 MAXIMUM RATINGS * Symbol VCC VIN VOUT IIN IOUT ICC PD T stg TL * Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Current, per Pin DC Supply Current, VCC and GND Pins Power Dissipation in Still Air, Plastic DIP+ SOIC Package+ Storage Temperature Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package) Value -0.5 to +7.0 -1.5 to VCC +1.5 -0.5 to VCC +0.5 ±20 ±25 ±50 750 500 -65 to +150 260 Unit V V V mA mA mA mW °C °C 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 TA tr, t f Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage, Output Voltage (Referenced to GND) Operating Temperature, All Package Types Input Rise and Fall Time (Figure 1) Min 4.5 0 -55 0 Max 5.5 VCC +125 500 Unit V V °C ns 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 a nd 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 V ). CC Unused outputs must be left open. SLS System Logic Semiconductor SL74HCT20 DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND) VCC Symbol Parameter Test Conditions V Guaranteed Limit 25 °C to -55°C 2.0 2.0 0.8 0.8 4.4 5.4 3.98 0.1 0.1 0.26 ±0.1 2.0 ≤85 °C 2.0 2.0 0.8 0.8 4.4 5.4 3.84 0.1 0.1 0.33 ±1.0 20 ≤125 °C 2.0 2.0 0.8 0.8 4.4 5.4 3.7 0.1 0.1 0.4 ±1.0 40 µA µA V Unit VIH VIL VOH Minimum High-Level Input Voltage Maximum Low -Level Input Voltage Minimum High-Level Output Voltage VOUT=0.1 V or VCC-0.1 V IOUT≤ 20 µA VOUT=0.1 V or VCC-0.1 V IOUT ≤ 20 µA VIN= VIH or VIL IOUT ≤ 20 µA VIN= VIH or VIL IOUT ≤ 4.0 mA 4.5 5.5 4.5 5.5 4.5 5.5 4.5 4.5 5.5 4.5 5.5 5.5 V V V VOL Maximum Low-Level Output Voltage VIN=VIH IOUT ≤ 20 µA VIN=VIH IOUT ≤ 4.0 mA IIN ICC Maximum Input Leakage Current Maximum Quiescent Supply Current (per Package) Quiescent Additional Supply Current VIN=VCC or GND VIN=VCC or GND IOUT=0µA VIN=2.4 V,Any One Input VIN=VCC or GND, Other Inputs IOUT=0µA ∆ICC ≥-55 °C 25 °C to 125°C 2.4 mA 5.5 2.9 SLS System Logic Semiconductor SL74HCT20 AC ELECTRICAL CHARACTERISTICS (VCC =5.0 V ±10%,CL=50pF,Input t r=t f=6.0 ns) Guaranteed Limit Symbol tPLH, t PHL tTLH, t THL CIN Parameter Maximum Propagation Delay, Input A ,B,C or D to Output Y (Figures 1 and 2) Maximum Output Transition Time, Any Output (Figures 1 and 2) Maximum Input Capacitance 25 °C to -55°C 28 15 10 ≤85°C 35 19 10 ≤125°C 42 22 10 Unit ns ns pF Power Dissipation Capacitance (Per Gate) CPD Used to determine the no-load dynamic power consumption: PD=CPDVCC2f+ICCVCC Typical @25°C,VCC=5.0 V 29 pF Figure 1. Switching Waveforms Figure 2. Test Circuit EXPANDED LOGIC DIAGRAM (1/2 of the Device) SLS System Logic Semiconductor