RFHCS362F View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

RFHCS362F

KEELOQ® Code Hopping Encoder with UHF ASK/FSK Transmitter

Microchip Technology 

rfHCS362G/362F

2.0 DEVICE DESCRIPTION

The block diagram in Figure 2-1 shows the internal

configuration with the top half representing the encoder

and the bottom half the UHF transmitter. Note that con-

nections between the encoder and transmitter are

made external to the device for more versability.

Typical application circuits are shown in Figure 1-5 and

Figure 1-6. The rfHCS362G/362F requires only the

addition of push button switches and few external com-

ponents for use as a transmitter in your security appli-

cation. See Table 2-1 for pinout description. Figure 2-2

shows the device I/O circuits.

FIGURE 2-1: rfHCS362 BLOCK DIAGRAM

Oscillator

RESET Circuit

LED

LED Driver

RFEN

PLL Driver

Controller

Power

Latching

and

Switching

DATA

VSS

VDD

EEPROM

Encoder

32-bit Shift Register

SHIFT

Button Input Port

S3 S2 S1 S0

RFENIN

Mode

Control

Logic

FSK Switch

DATAFSK (1)

FSKOUT (1)

CLKOUT

VDDRF

VSSRF

Divide

by 4

Fixed

Divide

by 32

Crystal

Oscillator

XTAL

Phase

Detector

and

Charge Pump

LF

Voltage

Controlled

Oscillator

(VCO)

PS/DATAASK

Power

Amplifier

(PA)

Note 1: rfHCS362F only.

ANT2 ANT1

DS41189B-page 8

© 2011 Microchip Technology Inc.

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