T5744 Ver la hoja de datos (PDF) - Atmel Corporation

Número de pieza

componentes Descripción

Fabricante

T5744

UHF ASK/FSK Receiver

Atmel Corporation 

Features

• Minimal External Circuitry Requirements, no RF Components on the PC Board Except

Matching to the Receiver Antenna

• High Sensitivity, Especially at Low Data Rates

• SSO20 and SO20 package

• Fully Integrated VCO

• Supply Voltage 4.5 V to 5.5 V, Operating Temperature Range -40°C to 105°C

• Single-ended RF Input for Easy Adaptation to l/4 Antenna or Printed Antenna on PCB

• Low-cost Solution Due to High Integration Level

• Various Types of Protocols Supported (i.e., PWM, Manchester and Biphase)

• Distinguishes the Signal Strength of Several Transmitters via RSSI (Received Signal

Strength Indicator)

• ESD Protection According to MIL-STD. 883 (4KV HBM)

• High Image Frequency Suppression Due to 1 MHz IF in Conjunction with a SAW Front-

end Filter, up to 40 dB is thereby Achievable with Newer SAWs

• Power Management (Polling) is Possible by Means of a Separate Pin via the

Microcontroller

• Receiving Bandwidth BIF = 600 kHz

UHF ASK

Receiver

T5744

Description

The T5744 is a PLL receiver device for the receiving range of f0 = 300 MHz to

450 MHz. It is developed for the demands of RF low-cost data communication sys-

tems with low data rates and fits for most types of modulation schemes including

Manchester, Biphase and most PWM protocols. Its main applications are in the areas

of telemetering, security technology and keyless-entry systems.

Figure 1. System Block Diagram

1 Li cell

Encoder

Keys M44Cx9x

UHF ASK/FSK

Remote control transmitter

U2741B

T5744

XTO

PLL

VCO

Antenna Antenna

UHF ASK

Remote control receiver

Demod.

Data

interface

IF Amp

PLL

XTO

1...3

µC

Power

amp.

LNA

VCO

Rev. 4521B–RKE–01/03

1

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