A7121 Preliminary 2.4GHz GFSK Transceiver Typical Applications Wireless digital audio Wireless Mouse and Keyboard 2.4GHz ISM Band Communication System Wireless game pad Wireless toy General Description A7121 is a monolithic CMOS integrated circuit for wireless applications in 2.4GHz ISM band. The device is provided in a 32-lead plastic QFN5X5 packaging and is designed as a complete GFSK transceiver up to 3Mbps data rate. The chip features a fully programmable frequency synthesizer with integrated VCO circuitry. Features 2400MHz~2484MHz worldwide license free frequency band Up to 79 selectable channels 2.2 V – 2.8 V voltage supply Programmable output power up to 0dBm Channel switching time < 200us 1 or 3Mbps high speed data rate -20 ºC to 85 ºC operating temperature -87dBm sensitivity Direct / FIFO mode operation Modem interface for low speed, low cost microcontroller Low IF architecture with few external components RSS I BP _ DS BP _ LP F SP I _ CS SP I _ CLK SP I _ TXD SP I _RXD VDD _ D 32 31 30 29 28 27 26 25 Pin Configurations 24 RX _ C L K 2 23 RX _ SYN BP _ BPF 3 22 CD _ TXEN V DD _ A 4 21 TRXD RF I 5 20 TXD RFO 6 19 F _ CL K V DD _ VCO 7 18 REST EN BP _ VCO 8 17 MS0 15 16 MS 1 13 XS BB _CL K 12 XI 14 11 VDD _ P L L F P _ RDY 10 A7121 CPO BP _ L I M1 9 1 VT BP _ L I M 2 QFN Package Top View PRELIMINARY (Mar. 2005, Version 0.6) 1 AMIC Technology, Corp. A7121 Application Circuit Important Notice: AMIC reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice. AMIC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in lifesupport applications, devices or systems or other critical applications. Use of AMIC products in such applications is understood to be fully at the risk of the customer. PRELIMINARY (Mar. 2005, Version 0.6) 2 AMIC Technology, Corp.