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54LS14 Hex Inverters with Schmitt Trigger Inputs Literature Number: SNOS281
54LS14/DM74LS14 Hex Inverters with Schmitt Trigger Inputs June 1989 54LS14/DM74LS14 Hex Inverters with Schmitt Trigger Inputs General Description This device contains six independent gates each of which performs the logic INVERT function. Each input has hyster- esis which increases the noise immunity and transforms a slowly changing input signal to a fast changing, jitter free output. Connection Diagram Dual-In-Line Package TL/F/6353–1 Order Number 54LS14DMQB, 54LS14FMQB, 54LS14LMQB, DM74LS14M or DM74LS14N See NS Package Number E20A, J14A, M14A, N14A or W14B Function Table Y e A Input Output AY LH HL H e High Logic Level L e Low Logic Level C1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.
Absolute Maximum Ratings (Note) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range 54LS b55§Ct o a125§C DM74LS 0 §Ct o a70§C Storage Temperature Range b65§Ct o a150§C Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed. The device should not be operated at these limits. The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings. The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation. Recommended Operating Conditions Symbol Parameter 54LS14 DM74LS14 Units Min Nom Max Min Nom Max VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V HYS Input Hysteresis (Note 1) 0.4 0.8 0.4 0.8 V IOH High Level Output Current b0.4 b0.4 mA IOL Low Level Output Current 4 8 mA TA Free Air Operating Temperature b55 125 0 70 §C Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units(Note 2) VI Input Clamp Voltage V CC e Min, I I eb 18 mA b1.5 V VOH High Level Output V CC e Min, I OH e Max 54LS 2.5 3.4 VVoltage V IL e Max DM74 2.7 3.4 VOL Low Level Output V CC e Min, I OL e Max 54LS 0.25 0.4 Voltage V IH e Min DM74 0.35 0.5 V VCC e Min, I OL e 4 mA DM74 0.25 0.4 ITa Input Current at V CC e 5V, V I e VTa DM74 b0.14 mAPositive-Going Threshold ITb Input Current at V CC e 5V, V I e VTb DM74 b0.18 mANegative-Going Threshold II Input Current @ Max V CC e Max, V I e 7V DM74 0.1 mAInput Voltage VCC e Max, V I e 10.0V 54LS IIH High Level Input Current V CC e Max, V I e 2.7V 20 mA IIL Low Level Input Current V CC e Max, V I e 0.4V b0.4 mA IOS Short Circuit V CC e Max 54LS b20 b100 mAOutput Current (Note 3) DM74 b20 b100 ICCH Supply Current with V CC e Max 8.6 16 mAOutputs High ICCL Supply Current with V CC e Max 12 21 mAOutputs Low Note 1: VCC e 5V. Note 2: All typicals are at V CC e 5V, T A e 25§C. Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Switching Characteristics at V CC e 5V and T A e 25§C (See Section 1 for Test Waveforms and Output Load) RL e 2k X Symbol Parameter C L e 15 pF C L e 50 pF Units Min Max Min Max tPLH Propagation Delay Time 52 282 5 n sLow to High Level Output tPHL Propagation Delay Time 52 2 1 0 3 3 n sHigh to Low Level Output
Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier (E) Order Number 54LS14LMQB 14-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS14DMQB
Physical Dimensions inches (millimeters) (Continued) 14-Lead Small Outline Molded Package (M) Order Number DM74LS14M 14-Lead Molded Dual-In-Line Package (N) Order Number DM74LS14N
54LS14/DM74LS14 Hex Inverters with Schmitt Trigger Inputs Physical Dimensions inches (millimeters) (Continued) 14-Lead Ceramic Flat Package (W) Order Number 54LS14FMQB LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.
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a49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309 Arlington, TX 76017 Email: cnjwge @ tevm2.nsc.com Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408 Tel: 1(800) 272-9959 Deutsch Tel: ( a49) 0-180-530 85 85 Tsimshatsui, Kowloon Fax: 1(800) 737-7018 English Tel: ( a49) 0-180-532 78 32 Hong Kong Fran3ais Tel: ( a49) 0-180-532 93 58 Tel: (852) 2737-1600 Italiano Tel: ( a49) 0-180-534 16 80 Fax: (852) 2736-9960 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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