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DM74LS93N 数据表(PDF) 1 Page - National Semiconductor (TI) |
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DM74LS93N 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 10 page TLF6381 June 1989 DM74LS90DM74LS93 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 ’LS90 and divide- by-eight for the ’LS93 All of these counters have a gated zero reset and the LS90 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 ’LS90 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 45 mW Y Count frequency 42 MHz Connection Diagrams (Dual-In-Line Packages) TLF6381 – 1 Order Number DM74LS90M or DM74LS90N See NS Package Number M14A or N14A TLF6381 – 2 Order Number DM74LS93M or DM74LS93N See NS Package Number M14A or N14A C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
类似零件编号 - DM74LS93N |
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类似说明 - DM74LS93N |
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