General Description
The ASCell3911 is a low power, triple ISM band (868 / 433 / 315 MHz), single channel FSK transmitter designed to work in a remote control link together with the SC3912 receiver system cell.
The ASCell3911 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.

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.
· Supports clock for an external µC and allows clock free total shut down of the whole system.
· Wide supply range between 2,2 to 3,5 V.
· Low TX current, typical 8,5 mA @ 2,2 V.
· Low standby current, typical 0,5 µA.
· 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 frequency tolerance required.
· Typically only 1 XTAL, 4 capacitors and 2 inductors externally required.

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.