MC14549 ONSEMI [ON Semiconductor], MC14549 Datasheet
MC14549
Available stocks
Related parts for MC14549
MC14549 Summary of contents
Page 1
... These parts differ in only one control input. The Master Reset (MR) on the MC14549B is required in the cascaded mode when more than 8 bits are desired. The Feed Forward (FF) of the MC14559B is used for register shortening where End–of–Conversion (EOC) is required after less than eight cycles ...
Page 2
... MC14549B, MC14559B PIN ASSIGNMENT *For MC14549B Pin input. For MC14559B Pin input. TRUTH TABLES MC14549B SC SC MR( ) Clock Action t–1 t– None Reset Start Conversion Start Conversion Continue Conversion ...
Page 3
... To calculate total supply current at loads other than 50 pF (50 pF where (per package pF The formulas given are for the typical characteristics only at 25_C. MC14549B, MC14559B (Voltages Referenced – 55_C Min Max Min Vdc Symbol V 5 ...
Page 4
... PLH PHL L SC Setup Time Clock Pulse Width Pulse Width — Clock Rise and Fall Time Clock Pulse Frequency 6. The formulas given are for the typical characteristics only. MC14549B, MC14559B (6 pF 25_C Symbol V DD ...
Page 5
... MC14549B, MC14559B SWITCHING TIME TEST CIRCUIT AND WAVEFORMS NOTE: Pin TIMING DIAGRAM É É É É É É É É É É É É É É É É É É É É — Don’t care condition É É INH — Indicates Serial Out is inhibited low. ...
Page 6
... End of Convert (EOC) output is used as the controlling function, since with EOC = 0 (and with for MC14549B but either for MC14559B) no stable state exists under continual clocked operation. The MC14559B will automatically recirculate after EOC = 1 during externally strobed operation, provided ...
Page 7
... Continuously Cycling 8–Bit ADC (Figure 3) This ADC is running continuously because the EOC signal is fed back to the SC input, immediately initiating a new cycle on the next clock pulse. MC14549B, MC14559B TYPICAL APPLICATIONS Continuously Cycling 12–Bit ADC (Figure 4) Because each successive approximation register (SAR) has a capability of handling only an eight–bit word, two must be cascaded to make an ADC with more than eight bits. When it is necessary to cascade two SAR’ ...
Page 8
... With these two linear parts it is possible to construct SA–ADCs with an accuracy eight bits, using as the register one MC14549B or one MC14559B. An additional CMOS block will be necessary to generate the clock frequency. Additional information on successive approximation ADC is found in Motorola Application Note AN– ...
Page 9
... MC14549B, MC14559B PACKAGE DIMENSIONS PLASTIC DIP PACKAGE –A– –T– http://onsemi.com PDIP–16 P SUFFIX CASE 648–08 ISSUE ...
Page 10
... MC14549B, MC14559B PACKAGE DIMENSIONS DW SUFFIX PLASTIC SOIC PACKAGE CASE 751G– 16X e 14X C T http://onsemi.com SOIC–16 ISSUE ...
Page 11
... Notes MC14549B, MC14559B http://onsemi.com 11 ...
Page 12
... English Phone: (+1) 303–308–7142 (Mon–Fri 12:00pm to 5:00pm GMT) Email: ONlit@hibbertco.com EUROPEAN TOLL–FREE ACCESS*: 00–800–4422–3781 *Available from Germany, France, Italy, UK MC14549B, MC14559B CENTRAL/SOUTH AMERICA: Spanish Phone: 303–308–7143 (Mon–Fri 8:00am to 5:00pm MST) Email: ONlit–spanish@hibbertco.com ASIA/PACIFIC: LDC for ON Semiconductor – ...