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 SN74LS14 VCC 1 14 13 12 11 10 9 8 1 2 3 4 5 6 7 PLASTIC N SUFFIX CASE 646 14 GND 1 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, 2006 June, 2006 − Rev. 2 1 ORDERING INFORMATION 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 mA VCC = 5.0 V, VIN = VT+ IT− Input Current at Negative-Going Threshold −0.18 mA VCC = 5.0 V, VIN = VT− IIH Input HIGH Current IIL Input LOW Current IOS Short Circuit Current (Note 1) 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 −20 Power Supply Current ICC −1.5 3.4 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 Total, Output HIGH 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 V T , THRESHOLD VOLTAGE (VOLTS) Δ V T, HYSTERESIS (VOLTS) VCC = 5 V TA = 25°C 3 VT+ 1.2 2 VT− 0.8 1 0 TA = 25°C 1.6 DVT 0.4 0 0.4 0.95 1.2 VIN, INPUT VOLTAGE (VOLTS) 1.8 0 4.5 2 Figure 2. VIN versus VOUT Transfer Function 4.75 5 5.25 VCC, POWER SUPPLY VOLTAGE (VOLTS) Figure 3. Threshold Voltage and Hysteresis versus Power Supply Voltage 1.9 V T , THRESHOLD VOLTAGE (VOLTS) Δ V T, HYSTERESIS (VOLTS) V O , OUTPUT VOLTAGE (VOLTS) 5 1.7 VT+ 1.5 1.3 1.1 0.9 0.7 −55 ° VT− Δ VT 0° 25° 75° TA, AMBIENT TEMPERATURE (°C) Figure 4. Threshold Voltage Hysteresis versus Temperature http://onsemi.com 3 125° 5.5 SN74LS14 PACKAGE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 646−06 ISSUE M 14 8 B 1 7 A F L N C −T− SEATING PLANE H G D 14 PL J K 0.13 (0.005) M M http://onsemi.com 4 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 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 0.25 (0.010) 7 G 0.25 (0.010) M T B B M F J M K D 14 PL M R X 45 _ C −T− SEATING PLANE P 7 PL 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 registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 5 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative SN74LS14/D