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| SAA7114E资料 | |
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SAA7114E PDF Download |
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File Size : 116 KB
Manufacturer:Philips Description:When a valid DTMF signal burst is present, ESt or DStD will go high. The application of four clock pulses on the ACK pin will provide a 4-bit serial binary code representing the decoded DTMF digit on the SD pin output. The rising edge of the first pulse applied on the ACK pin latches and shifts the least significant bit of the decoded digit on the SD pin. The next three pulses on ACK pin will shift the remaining latched bits in a serial format (see Figure 5). If less than four pulses are applied to the ACK pin, new data cannot be latched even though ESt/DStD can be valid. Clock pulses should be applied to clock out any remaining data bits to resume normal operation. Any transitions in excess of four pulses will be ignored until the next rising edge of the ESt/DStD. ACK should idle at logic low. The 4-bit binary representing all 16 standard DTMF digits are shown in Table 1. |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：SAA7114E 厂 家：Philips 封 装：BGA 批 号：03+ 数 量：2728 说 明：绝对原装正品底价 |
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