| Part Numbert | Mfg | Packt | D/C | Descriptiont | Qty | Company/Contact |
74LS157E Datasheet
74LS157E Price MECHANICAL CHARACTERISTICS CASE: Hermetically sealed glass case. D0-41. FINISH: All externaI surfaces are corrosion resistant and leads sol- derable. THERMAL RESISTANCE: Less than lOOoC/ Watt junction t lead at 0.375-inches from body. POLARITY: Banded end is cathode. WEIGHT: 0.378 grams (Typical). 74LS157E on stock
Integrated VSB/QAM QAMLink~ receiver - 12-bit A/D converter with internal AGC amplifier - Full equalizer architecture spans up to -35 t0 49 ys delays - Direct IF sampled architecture reduces system cost - Single IF signal path for QAM/VSB/NTSC to reduce system costs - ITU-T J.83 Annex A/B/C FEC modes - MPEG-2 transport output (serial/parallel) - All-digital clock and carrier recovery - Integrated PLLs to minimize external components - All acquisition times typically less than 50 ms QPSK out-of-band receiver - 100-200 MHz receiver LO with input AGC and 6-bit A/D - Variable symbol rate QPSK receiver - Digital demodulator, Nyquist filters, tracking loops, and four-tap adaptive equalizer - DVS-167 (DavicrM)/DVS_178 (DigiCipherIFM) FEC decoder NTSC/PAL IF Demodulator - Adjacent channel rejection filters - Programmable digital audio trap filter - Programmable group delay compensation filter - Analog Composite Video Baseband Signal (CVBS) output - FM demod output supports internal BTSC stereo decoder, external BTSC stereo decoder (baseband or IF input), or external Zweiton M decoder |
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