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| DM74ALS14 Hex Inverter with Schmitt Trigger Inputs March 1986 Revised February 2000 DM74ALS14 Hex Inverter with Schmitt Trigger Inputs General Description 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. Features s Input hysteresis s Low output noise generation s High input noise immunity s Switching specification at 50 pF s Switching specifications guaranteed over full temperature and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally and pin-for-pin compatible with Schottky and low power Schottky TTL counterparts s Improved AC performance over low power Schottky counterpart Ordering Code: Order Number DM74ALS14M DM74ALS14SJ DM74ALS14N Package Number M14A M14D N14A Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code. Connection Diagram Function Table Y=A Input A L H H = HIGH Logic Level L = LOW Logic Level Output Y H L (c) 2000 Fairchild Semiconductor Corporation DS008773 www.fairchildsemi.com DM74ALS14 Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Storage Temperature Range Operating Free Air Temperature Range Typical JA N Package M Package 78.5C/W 109.0C/W 7V 7V -65C to +150C 0C to +70C Note 1: The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables 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 VCC VT+ VT- HYS IOH IOL TA Supply Voltage Positive-Going Input Threshold Voltage Negative-Going Input Threshold Voltage Input Hysteresis HIGH Level Output Current LOW Level Output Current Operating Free Air Temperature Range 0 VCC = Min to Max VCC = 5V VCC = Min to Max VCC = 5V VCC = Min to Max VCC = 5V Parameter Min 4.5 1.4 1.55 0.75 0.85 0.5 0.6 -0.4 8 70 Nom 5 Max 5.5 2 1.85 1.2 1.1 Units V V V V mA mA C Electrical Characteristics over recommended free air temperature range (unless otherwise noted) Symbol VIK VOH VOL IT+ IT- II IIH IIL IO ICCH ICCL VOLP VOLV VIHD VILD Parameter Input Clamp Voltage HIGH Level Output Voltage LOW Level Output Voltage Input Current at Positive-Going Threshold Voltage Input Current at Maximum Input Voltage HIGH Level Input Current LOW Level Input Current Output Drive Current Supply Current with Outputs HIGH Supply Current with Outputs LOW Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum LOW Level Dynamic Input Voltage Note 2: Plastic DIP package. Note 3: n = number of device outputs, n - 1 outputs switching, each driven 0V to 3V one output @ GND. Note 4: n = number of device outputs, n outputs switching, n - 1 inputs switching 0V to 3V. Input under test switching 3V to threshold (VILD); 0V to threshold (VIHD); f = 1 MHz. Test Conditions VCC = Min, II = -18 mA VCC = 4.5V to 5.5V, IOH = Max VCC = Min IOL = 4 mA IOL = 8 mA VCC = 5V, VI = VT+ VCC = Max, VI = 7V VCC = Max, VI = 2.7V VCC = Max, VI = 0.4V VCC = Max, VO = 2.25V VCC = Max VCC = Max VCC = 5.0V, TA = 25C (Figures 1, 2); (Note 2)(Note 3) VCC = 5.0V, TA = 25C (Figures 1, 2); (Note 2)(Note 3) VCC = 5.0V, TA = 25C (Note 2)(Note 4) VCC = 5.0V, TA = 25C (Note 2)(Note 4) Min VCC - 2 Typ Max -1.5 Units V V V V A A A A A mA mA mA V V V V 0.25 0.35 0.4 0.5 20 -100 100 20 -100 Input Current at Negative-Going Threshold Voltage VCC = 5V, VI = VT- -30 -112 12 12 0.16 -0.27 1.44 1.15 www.fairchildsemi.com 2 DM74ALS14 Switching Characteristics Symbol tPLH tPHL Parameter over recommended operating free air temperature range Conditions VCC = 4.5V to 5.5V RL = 500, CL = 50 pF Min 2 2 Max 12 10 Units ns ns Propagation Delay Time LOW-to-HIGH Level Output Propagation Delay Time HIGH-to-LOW Level Output ALS Noise Characteristics The setup of a noise characteristics measurement is critical to the accuracy and repeatability of the tests. The following is a brief description of the setup used to measure the noise characteristics of ALS. Equipment: Word Generator Printed Circuit Board Test Fixture scope Procedure: 1. Verify Test Fixture Loading: Standard Load 50 pF, 500. 2. Deskew the word generator so that no two channels have greater than 150 ps skew between them. This requires that the oscilloscope be deskewed first. Swap out the channels that have more than 150 ps of skew until all channels being used are within 150 ps. It is important to deskew the word generator channels before testing. This will ensure that the outputs switch simultaneously. 3. Terminate all inputs and outputs to ensure proper loading of the outputs and that the input levels are at the correct voltage. 4. Set VCC to 5.0V. 5. Set the word generator to toggle all but one output at a frequency of 1 MHz. Greater frequencies will increase DUT heating and affect the results of the measurement. 6. Set the word generator input levels at 0V LOW and 3V HIGH. Verify levels with a digital volt meter. VOLP/VOLV and VOHP/VOHV: * Determine the quiet output pin that demonstrates the greatest noise levels. The worst case pin will usually be the furthest from the ground pin. Monitor the output voltages using a 50 coaxial cable plugged into a standard SMB type connector on the test fixture. Do not use an active FET probe. Dual Trace Oscillo* Verify that the GND reference recorded on the oscilloscope has not drifted to ensure the accuracy and repeatability of the measurements. VILD and VIHD: * Monitor one of the switching outputs using a 50 coaxial cable plugged into a standard SMB type connector on the test fixture. Do not use an active FET probe. * First increase the input LOW voltage level, VIL, until the output begins to oscillate. Oscillation is defined as noise on the output LOW level that exceeds VIL limits, or on output HIGH levels that exceed VIH limits. The input LOW voltage level at which oscillation occurs is defined as VILD. * Next decrease the input HIGH voltage level on the word generator, VIH until the output begins to oscillate. Oscillation is defined as noise on the output LOW level that exceeds VIL limits, or on output HIGH levels that exceed VIH limits. The input HIGH voltage level at which oscillation occurs is defined as VIHD. * Verify that the GND reference recorded on the oscilloscope has not drifted to ensure the accuracy and repeatability of the measurements. VOHV and VOHP are measured with respect to VOH reference. VOLV and VOLP are measured with respect to ground reference. Input pulses have the following characteristics: f = 1 MHz, tr = 3 ns, t f = 3 ns, skew < 150 ps. FIGURE 1. Quiet Output Noise Voltage Waveforms FIGURE 2. Simultaneous Switching Test Circuit 3 www.fairchildsemi.com DM74ALS14 Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M14A www.fairchildsemi.com 4 DM74ALS14 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M14D 5 www.fairchildsemi.com DM74ALS14 Hex Inverter with Schmitt Trigger Inputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N14A Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD'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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com 6 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com |
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