ISM 868 MHz, 433 MHz and 315 MHz FSK Receiver Cell – Preliminary Data Sheet
ASCell3912
Austria Mikro Systeme International AG
Key Features
• Supports triple band operation: Europe 868 MHz and 433 MHz-, US and Japan 315 MHz ISM
band.
• Designed to be conform to EN 300 220, and FCC 47 CFR Ch.1 par.15 requirements.
• Provides highly reliable packet oriented data transmission in blocks of 128 bit.
• Event oriented single message transmission and status oriented and continuous message
transmission supported.
• Special transmission protocol for high reliability even in presence of burst interferer (e.g.
GSM) implemented.
• RX sensitivity of the receiver typical -100 dBm.
• Supports clock for an external µC and allows clock free total shut down of the whole system.
• Wide supply range between 2.7 to 5.5 V.
• Low RX current, typical 10 mA @ 2.4 V.
• Low idle mode current, typical 1.2mA.
• Wide operating temperature range from –40 °C to +85 °C.
• Only a low cost XTAL for 25 ppm (868 MHz) or 50 ppm (433 and 315 MHz) reference fre-
quency tolerance required.
• Minimum only 1 XTAL and 4 capacitors externally required.
General Description
The ASCell3912 is a low power, triple ISM band (868 / 433 / 315 MHz), single channel FSK re-
ceiver designed to work in a remote control link together with the SC3911 transmitter system
cell.
The ASCell3912 performs packet oriented data transmission, in a single message- or continuos-
message mode using a special protocol to ensure high reliability even in presence of strong
pulsed interferers in close adjacent bands like e.g. GSM.
A general bi-directional micro-controller (µC) interface is provided, to support the µC with clock-
and reset- signal, and to operate the highly efficient power up/down management.
As external components the SC3911 need at minimum only a reference XTAL, and 4 capacitors.
Applications
• Key-less car entry systems.
• Short range packet oriented data transmission.
• Security applications and alarm systems.
• Domestic remote control systems.
• Industrial remote control systems.
• Remote metering.
Rev. A, February 2000
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