TECHNICAL DATA IN74LS14 Hex Schmitt-Trigger Inverter This device contains six independent gates each of which performs the logic INVERT function. Each input has hysteresis which increases the noise immunity and transforms a slowly changing input signal to a fast changing, jitter free output. ORDERING INFORMATION IN74LS14N Plastic IN74LS14D SOIC TA = 0° to 70° C for all packages LOGIC DIAGRAM PIN ASSIGNMENT FUNCTION TABLE Inputs Output A Y L H H L PIN 14 =VCC PIN 7 = GND 1 IN74LS14 MAXIMUM RATINGS* Symbol Parameter Value Unit VCC Supply Voltage 7.0 V VIN Input Voltage 7.0 V VOUT Output Voltage 5.5 V Tstg Storage Temperature Range -65 to +150 °C * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit 4.75 5.25 V VCC Supply Voltage IOH High Level Output Current -15 mA IOL Low Level Output Current 24 mA TA Ambient Temperature Range +70 °C 0 DC ELECTRICAL CHARACTERISTICS over full operating conditions Guaranteed Limit Symbol Parameter Test Conditions Min Max Unit VT+ - Positive-Going Input Threshold Voltage VCC = 5 V 0.5 1 V VT- - Negative-Going Input Threshold Voltage VCC = 5 V 1.4 1.9 V Hysteresis VCC = 5 V 0.4 VIK Input Clamp Voltage VCC = min, IIN = -18 mA VOH High Level Output Voltage VCC = min, IOH = -0.4 mA, VI=0.5 V VOL Low Level Output Voltage VCC = min, IOL = 4 mA VI=1.9 V 0.4 VCC = min, IOL = 8 mA VI=1.9 V 0.5 VCC = max, VIN = 2.7 V 20 µA VCC = max, VIN = 7.0 V 0.1 mA -0.4 mA -100 mA 16 mA VT+ - VT- IIH High Level Input Current IIL Low Level Input Current VCC = max, VIN = 0.4 V IO Output Short Circuit Current VCC = max, VO =0 V (Note 1) ICC Supply Current VCC = max Total with outputs high Total with outputs low V -1.5 2.7 -20 V V V 21 Note 1: Not more than one output should be shorted at a time, and the duration should not exceed one second. 2 IN74LS14 AC ELECTRICAL CHARACTERISTICS (TA = 25°C, VCC = 5.0 V, CL = 15 pF, RL = 2 kΩ, tr = 15 ns, tf = 6.0 ns) Symbol Parameter Min Max Unit tPLH Propagation Delay, Input A to Output Y 22 ns tPHL Propagation Delay, Input A to Output Y 22 ns Figure 1. Switching Waveforms NOTES A. CL includes probe and jig capacitance. B. All diodes are 1N916 or 1N3064. Figure 2. Test Circuit 3