Found 4 alternatives for SL900A-AQFM by ams-OSRAM. Rfid Rf Access Monitoring Ics — 16-VQFN Exposed Pad.
IC RFID READER 110-150KHZ 16QFN
IC RFID READER 15-150KHZ 16QFN
IC RFID TRANSP 134.2KHZ 16QFN