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DM5490J Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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DM5490J Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 10 page TLF6533 July 1992 DM5490DM7490A DM7493A Decade and Binary Counters General Description Each of these monolithic counters contains four master- slave flip-flops and additional gating to provide a divide-by- two counter and a three-stage binary counter for which the count cycle length is divide-by-five for the 90A and divide- by-eight for the 93A All of these counters have a gated zero reset and the 90A also has gated set-to-nine inputs for use in BCD nine’s com- plement applications To use their maximum count length (decade or four-bit bina- ry) the B input is connected to the QA output The input count pulses are applied to input A and the outputs are as described in the appropriate truth table A symmetrical di- vide-by-ten count can be obtained from the 90A counters by connecting the QD output to the A input and applying the input count to the B input which gives a divide-by-ten square wave at output QA Features Y Typical power dissipation 90A 145 mW 93A 130 mW Y Count frequency 42 MHz Connection Diagrams Dual-In-Line Package TLF6533 – 1 Order Number DM5490J DM5490W or DM7490AN See NS Package Number J14A N14A or W14B Dual-In-Line Package TLF6533 – 2 Order Number DM7493AN See NS Package Number N14A C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
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