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LS7541 датащи(PDF) 2 Page - LSI Computer Systems |
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LS7541 датащи(HTML) 2 Page - LSI Computer Systems |
2 / 6 page INPUT/OUTPUT DESCRIPTION: CLOCK Input (Pin 1) An external resistor connected between this input and VDD, along with an internal capacitor and oscillator stage, generates a clock which is used for all timing functions. The recommended value of this resistor for 50Hz and 60Hz operation is specified in the ELECTRICAL CHAR- ACTERISTICS. The resistor value determines the Bright- ness Levels produced. (See Table 2) SYNC Input (Pin 2) 50 or 60Hz AC input for zero crossing detection. VDD (Pin 3) Supply voltage positive terminal. TOUCH Input (Pin 4) Input for sensing that a touch has been made on a lamp surface or other touch plate. CONTROL I/O (Pin 5) An external R-C network connected between this pin and VDD establishes the controlling feedback for the AGC Loop. MODE Input (Pin 6) A three-state input used to select the desired Brightness Step Sequence (See Table 1). VSS (Pin 7) Supply voltage negative terminal. TRIG (Pin 8) The TRIG output produces a negative going pulse eve- ry half-cycle of the SYNC input to trigger the triac. The delay, Td, of the pulse with respect to the SYNC signal determines the Brightness Level produced. (See Table 2 & Figure 2) SYNC (Pin 2) FIGURE 2. OUTPUT DELAY (Td) Td Td TRIG (Pin 8) ABSOLUTE MAXIMUM RATINGS: PARAMETER SYMBOL VALUE UNIT DC supply voltage VDD - VSS +7 V Any input voltage VIN VSS - 0.5 to VDD + 0.5 V Operating temperature TA -20 to +85 °C Storage temperature TSTG -65 to +150 °C The information included herein is believed to be accurate and reliable. However, LSI Computer Systems, Inc. assumes no responsibilities for inaccuracies, nor for any infringements of patent rights of others which may result from its use. 7541-072805-2 |
Аналогичный номер детали - LS7541_07 |
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Аналогичное описание - LS7541_07 |
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