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RFHCS362F датащи(PDF) 12 Page - Microchip Technology |
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RFHCS362F датащи(HTML) 12 Page - Microchip Technology |
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12 / 60 page ![]() rfHCS362G/362F DS41189A-page 12 Preliminary © 2002 Microchip Technology Inc. 2.1.3 LOW VOLTAGE DETECTOR A low battery voltage detector onboard the rfHCS362G/ 362F can indicate when the operating voltage drops below a predetermined value. There are eight options available depending on the VLOW[0..2] configuration options. The options provided are: FIGURE 2-4: rfHCS362 VLOW DETECTOR (TYPICAL) FIGURE 2-5: rfHCS362 VLOW DETECTOR (TYPICAL) The output of the low voltage detector is transmitted in each code word, so the decoder can give an indication to the user that the transmitter battery is low. Operation of the LED changes as well to further indicate that the battery is low and needs replacing. 000 -2.0V 100 -4.0V 001 -2.1V 101 -4.2V 010 -2.2V 110 -4.4V 011 -2.3V 111 -4.6V 1.5 1.7 1.9 2.1 2.3 2.5 2.7 -40 -25 -10 5 20 35 50 65 80 Temperature (°C) VLOW Option x = 000 s = 001 v = 010 " = 011 Temperature (°C) 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 -40 -25 -10 5 20 35 50 65 80 VLOW Option x = 100 s = 101 v = 110 " = 111 |
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