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U3742BM Datasheet, PDF (1/32 Pages) ATMEL Corporation – UHF ASK/FSK RECEIVER | |||
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Features
⢠IC Distinguishes the Signal Strength of Several Transmitters via RSSI (Received Signal
Strength Indicator) Output
⢠Minimal External Circuitry Requirements, No RF Components on the PC Board Except
Matching to the Receiver Antenna
⢠High Sensitivity, Especially at Low Data Rates
⢠Sensitivity Reduction Possible Even While Receiving
⢠Fully Integrated VCO
⢠Low Power Consumption Due to Configurable Self-polling with a Programmable Time
Frame Check
⢠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 λ/4 Antenna or Printed Antenna on PCB
⢠Low-cost Solution Due to High Integration Level
⢠ESD Protection According to MIL-STD. 883 (4 KV HBM)
⢠High Image Frequency Suppression Due to 1 MHz IF in Conjunction with a SAW
Front-end Filter (Up to 40 dB Achievable with Newer SAWs)
⢠Communication to Microcontroller Possible via a Single, Bi-directional Data Line
⢠Power Management (Polling) is also Possible by Means of a Separate Pin via the
Microcontroller
UHF ASK/FSK
Receiver
U3742BM
Description
The U3742BM is a multi-chip PLL receiver device supplied in an SO20 package. It has
been especially developed for the demands of RF low-cost data transmission systems
with data rates from 1 kBaud to 10 kBaud (1 kBaud to 3.2 kBaud for FSK) in Manches-
ter or Bi-phase code. The receiver is well suited to operate with Atmel's PLL RF
transmitter IC U2741B. Its main applications in the area of wireless control are teleme-
tering, security technology, tire-pressure monitoring and keyless-entry systems. It can
be used in the frequency receiving range of f0 = 300 MHz to 450 MHz for ASK or FSK
data transmission. All the statements made in this data sheet refer both to
433.92 MHz and 315 MHz applications.
Rev. 4735AâRKEâ11/03
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