RFHCS362F中文資料微芯科技數(shù)據(jù)手冊PDF規(guī)格書

GENERAL DESCRIPTION

The rfHCS362G/362F is a code hopping encoder plus UHF transmitter designed for secure wireless command and control systems. The rfHCS362G/362F utilizes the KEELOQ? code hopping technology which incorporates high security in a small package outline at a low cost to make this device well suited for unidirec tional remote keyless entry systems and access control systems.

General

? Combination KEELOQ? encoder and synthesized

UHF ASK/FSK transmitter in a single package

? Operates on a single lithium coin cell

- <200 nA typical standby current

- 4.8 to 11.5 mA transmit current

- 2.2 to 5.5V operation

? Integrated solution with minimum external parts

? Separate pin-outs for KEELOQ encoder and RF

transmitter provides for design flexibility

Code Hopping Encoder

? Programmable minimum code word completion

? Battery low signal transmitted to receiver with programmable threshold

? Non-volatile EEPROM storage of synchronization data

? Easy to use EEPROM programming interface

? PWM or Manchester modulation

? Selectable encoder data rate 417 to 3334 bps

? On-chip tunable encoder oscillator

? RF Enable output for transmitter control

? Button inputs have internal pull-down resistors

? Elapsed time and button queuing options

? Current limiting on LED output

? 2-bit CRC for error detection

UHF ASK/FSK Transmitter

? Conforms to US FCC Part 15.231 regulations and European ERC 70-03E and EN 300 220-1 requirements

? VCO phase locked to quartz crystal reference; allows narrow receiver bandwidth to maximizerange and interference immunity

? Crystal frequency divide by 4 output (CLKOUT)

? Transmit frequency range (310 – 440 MHz) set by Crystal frequency

? ASK Modulation

? FSK Modulation through crystal pulling (rfHCS362F)

? Adjustable output power: -12 dBm to +2 dBm

? Differential output configurable for single or double ended loop antenna

? Automatic power amplifier inhibit until PLL lock

Applications

? Automotive Remote Keyless Entry (RKE) systems

? Automotive alarm systems

? Automotive immobilizers

? Community gate and garage door openers

? Identity tokens with usage counters

? Burglar alarm systems

? Building access