SN74LS14 Schmitt Triggers Dual Gate/Hex Inverter The SN74LS14 contains logic gates/inverters which accept standard TTL input signals and provide standard TTL output levels. They are capable of transforming slowly changing input signals into sharply defined, jitter-free output signals. Additionally, they have greater noise margin than conventional inverters. Each circuit contains a Schmitt trigger followed by a Darlington level shifter and a phase splitter driving a TTL totem pole output. The Schmitt trigger uses positive feedback to effectively speed-up slow input transitions, and provide different input threshold voltages for positive and negative-going transitions. This hysteresis between the positive-going and negative-going input thresholds (typically 800 mV) is determined internally by resistor ratios and is essentially insensitive to temperature and supply voltage variations. http://onsemi.com LOW POWER SCHOTTKY LOGIC AND CONNECTION DIAGRAMS 14 1 SN74LS14 VCC 14 13 12 11 10 9 8 1 2 3 4 5 6 7 PLASTIC N SUFFIX CASE 646 14 1 GND SOIC D SUFFIX CASE 751A GUARANTEED OPERATING RANGES Symbol VCC Parameter Supply Voltage Min Typ Max Unit 4.75 5.0 5.25 V 0 25 70 °C TA Operating Ambient Temperature Range IOH Output Current – High –0.4 mA IOL Output Current – Low 8.0 mA Semiconductor Components Industries, LLC, 2001 October, 2001 – Rev. 1 ORDERING INFORMATION 1 Device Package Shipping SN74LS14N 14 Pin DIP 2000 Units/Box SN74LS14D SOIC–14 55 Units/Rail SN74LS14DR2 SOIC–14 2500/Tape & Reel Publication Order Number: SN74LS14/D SN74LS14 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Min Parameter Typ Max Unit Test Conditions VT+ Positive-Going Threshold Voltage 1.5 2.0 V VCC = 5.0 V VT– Negative-Going Threshold Voltage 0.6 1.1 V VCC = 5.0 V VT+–VT– Hysteresis 0.4 V VCC = 5.0 V VIK Input Clamp Diode Voltage V VCC = MIN, IIN = –18 mA VOH Output HIGH Voltage V VCC = MIN, IOH = –400 µA, VIN = VIL VOL Output LOW Voltage IT+ Input Current at Positive-Going Threshold –0.14 IT– Input Current at Negative-Going Threshold –0.18 0.8 –0.65 2.7 0.25 0.4 V VCC = MIN, IOL = 4.0 mA, VIN = 2.0 V 0.35 0.5 V VCC = MIN, IOL = 8.0 mA, VIN = 2.0 V 1.0 IIH Input HIGH Current IIL Input LOW Current IOS Short Circuit Current (Note 1) –20 Power Supply Current ICC –1.5 3.4 mA VCC = 5.0 V, VIN = VT+ mA VCC = 5.0 V, VIN = VT– 20 µA VCC = MAX, VIN = 2.7 V 0.1 mA VCC = MAX, VIN = 7.0 V –0.4 mA VCC = MAX, VIN = 0.4 V –100 mA VCC = MAX, VOUT = 0 V mA VCC = MAX 8.6 16 12 21 ut HIGH Total, Out Output Total, Output LOW Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C) Symbol Parameter Max Unit Test Conditions VCC = 5.0 V CL = 15 pF tPLH Propagation Delay, Input to Output 22 ns tPHL Propagation Delay, Input to Output 22 ns 3V 1.6 V VIN 0.8 V 0V tPHL VOUT tPLH 1.3 V Figure 1. AC Waveforms http://onsemi.com 2 1.3 V SN74LS14 2 4 VT+ 1.6 3 1.2 2 VT- 0.8 1 0 TA = 25°C V T , THRESHOLD VOLTAGE (VOLTS) ∆ V T, HYSTERESIS (VOLTS) VCC = 5 V TA = 25°C VT 0.4 0 0.4 0.95 1.2 VIN, INPUT VOLTAGE (VOLTS) 1.8 0 4.5 2 4.75 5 5.25 VCC, POWER SUPPLY VOLTAGE (VOLTS) Figure 2. VIN versus VOUT Transfer Function Figure 3. Threshold Voltage and Hysteresis versus Power Supply Voltage 1.9 V T , THRESHOLD VOLTAGE (VOLTS) ∆ V T, HYSTERESIS (VOLTS) V O , OUTPUT VOLTAGE (VOLTS) 5 VT+ 1.7 1.5 1.3 1.1 VT- 0.9 ∆VT 0° 25° 75° TA, AMBIENT TEMPERATURE (°C) 0.7 -55° 125° Figure 4. Threshold Voltage Hysteresis versus Temperature PACKAGE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 646–06 ISSUE M 14 8 1 7 B A F L N C –T– SEATING PLANE J K H G D 14 PL 0.13 (0.005) M M http://onsemi.com 3 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. DIM A B C D F G H J K L M N INCHES MIN MAX 0.715 0.770 0.240 0.260 0.145 0.185 0.015 0.021 0.040 0.070 0.100 BSC 0.052 0.095 0.008 0.015 0.115 0.135 0.290 0.310 --10 0.015 0.039 MILLIMETERS MIN MAX 18.16 18.80 6.10 6.60 3.69 4.69 0.38 0.53 1.02 1.78 2.54 BSC 1.32 2.41 0.20 0.38 2.92 3.43 7.37 7.87 --10 0.38 1.01 5.5 SN74LS14 PACKAGE DIMENSIONS D SUFFIX PLASTIC SOIC PACKAGE CASE 751A–03 ISSUE F NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. –A– 14 8 –B– 1 P 7 PL 0.25 (0.010) 7 G M B M F R X 45 C –T– SEATING PLANE D 14 PL 0.25 (0.010) M T B J M K S A S DIM A B C D F G J K M P R MILLIMETERS MIN MAX 8.55 8.75 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.19 0.25 0.10 0.25 0 7 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.337 0.344 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.008 0.009 0.004 0.009 0 7 0.228 0.244 0.010 0.019 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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