Datenblatt-Suchmaschine für elektronische Bauteile |
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M-993 Datenblatt(PDF) 3 Page - Clare, Inc. |
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M-993 Datenblatt(HTML) 3 Page - Clare, Inc. |
3 / 6 page Data/Tone Selection D3 D2 D1 D0 Frequency (Hz) Use 12 0000 1100 1700 Key Pulse (KP) 0 0 0 1 700 900 Digit 1 0010 700 1100 Digit 2 0011 900 1100 Digit 3 0100 700 1300 Digit 4 0101 900 1300 Digit 5 0110 1100 1300 Digit 6 0111 700 1500 Digit 7 1000 900 1500 Digit 8 1001 1100 1500 Digit 9 1010 1300 1500 Digit 0 1011 1500 1700 ST 1100 900 1700 ST1 1101 1300 1700 ST2 1110 700 1700 ST3 Pin Function Pin Function CE Latches data and enables output (active low input). D0 - D3 Data input pins. (See Data/Tone Selection.) D4-D5 Leave open. MUTE Output indicates that a signal is being generated at OUTDRIVE. OUTDRIVE Linear buffered tone output. V DD Most positive power supply input pin. V REF Internally generated mid-power supply voltage (output). V SS Most negative power supply input pin. X IN Crystal oscillator or digital clock input. X OUT Crystal oscillator output. M-993 www.clare.com 3 Rev. 1 A typical control sequence for the M-993 is: (1) set data lines Selection for data settings for a particular tone pair output).to desired frequency selection, (2) wait for data lines to settle, (3) drive the chip enable (CE) low, (4) maintain CE low for desired tone duration (Note: data lines may be changed after data hold time), and (5) return CE to a logic high. In a bus-oriented system, noise on the data lines may propagate through the device and appear at the out- put. To safeguard against this, use an external latch to clock the data into the device. In addition, it is good practice to bypass the V REF pin to ground with a small capacitor (~0.01mF) to reduce power supply noise. The designer should be aware of device timing requirements and design accordingly. Beware of hard- wiring the data input pins for dedicated tone genera- tion. An RC network like that shown in Power-On Reset Circuit should be used to momentarily reset the device immediately following a power-up to ensure reliable operation. Power-On Reset Circuit |
Ähnliche Teilenummer - M-993 |
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Ähnliche Beschreibung - M-993 |
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