RFHCS362F datasheet(11/54 Pages) MICROCHIP

Part #	RFHCS362F

Description	KEELOQ짰 Code Hopping Encoder with UHF ASK/FSK Transmitter

PDF	54 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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11 / 54 page

DS41189B-page 11

rfHCS362G/362F

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

Temperature (°C)

VLOW Option

◆ = 000

■ = 001

▲ = 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

VLOW Option

◆ = 100

■ = 101

▲ = 110

✖ = 111

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