ISM 868 MHz, 433 MHz and 315 MHz FSK Receiver Cell – Preliminary Data Sheet

ASCell3912

Rev. A, February 2000

Page 2 of 14

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.