_______________________________________________________________ maxim integrated products 1 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maxim-ic.com. aisg integrated transceiver max9947 general description the max9947 is an aisg-compliant, fully integrated transceiver. the max9947 receiver offers a typical dynamic range of 20db and integrates a bandpass filter that operates in the 2.176mhz frequency with a narrow 200khz bandwidth. the max9947 transmitter integrates a bandpass filter that is compliant with the aisg spectrum emission pro - file. it can modulate ook signals up to 115.2kbps. the output power can be varied with external resistors from +7dbm to +12dbm to compensate for loss in the external circuitry and cabling. the max9947 also features a direction output to facilitate the rs-485 bus arbitration in tower-mounted equipment. the max9947 is available in a small, 3mm x 3mm 16-pin tqfn and is rated for operation in the -40c to +85c temperature range. applications base stations tower equipment features s receiver wide input dynamic range -15dbm to +5dbm in 50 i s variable transmitter output level from +7dbm to +12dbm s aisg-compliant output emission profile s autodirection output s no need of microcontrollers to handle bus arbitration in tower-mounted equipment s supports all aisg data rates 9.6kbps 38.4kbps 115.2kbps s bandpass filter compliant with aisg protocol centered around 2.176mhz s 3.0v to 5.5v voltage supply s independent logic supply s small, 3mm x 3mm 16-pin tqfn package 19-5029; rev 2; 6/11 ordering information + denotes a lead(pb)-free/rohs-compliant package. * ep = exposed pad. connect ep to gnd to enhance thermal dissipation. evaluation kit available part temp range pin-package top mark MAX9947ETE+ -40n c to +85nc 16 tqfn-ep* ahf max9947 bandpass filter rxin syncout txout 1.5v ref -15dbm bandpass filter +7dbm to +12dbm res bias ook demodulator direction detection state machine analog switch gnd rxout dir dirmd2 dirmd1 txin xtal2 xtal1 v cc v l functional diagram abridged
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