51802-QFAA-R, replace 51822 original spot supply

brand: Model: 51802-qfaa-r Batch number: 2018+ Package form: BGA Type: digital integrated circuit Use: computer Function: logic circuit Conductivity Type: Bipolar Package shape: metal shell round type Integration: small scale Working power supply voltage: 3.3V Maximum power: 1W Working temperature: 85℃ Dimensions: 5*5mm Custom processing: Yes 256k flash：16k ram 128k flash：32k ram 51802, is the cost down version of 51822, which is more to meet the needs of consumers, and the 51822 p2p product. The 51822 is a powerful, flexible, multi-protocol SoC ideal for Bluetooth® low energy and 2.4GHz ultra-low energy wireless applications. The 51822 is built on a 32-bit  ARM ® Cortex™ M0 CPU with 256kB flash + 16kB RAM. The embedded  2.4GHz transceiver supports Bluetooth Low Energy and 2.4GHz operation, where the 2.4GHz mode is wirelessly compatible with Nordic Semiconductor's 24L series products. The 51822 is available in a 6x6mm 48-pin QFN package and a 3.5x3.8mm 64-ball Direct Chip Mounted Wafer Level Package (WLCSP). The 51822 is available in different versions with 256k or 128kB Flash capacity.