Dual UART with 128-byte FIFO and 20 Mbps RS485
The SC16C852SVIET151 is a 2-channel DUART (dual universal asynchronous receiver/transmitter) from NXP, supporting RS485 protocol at a maximum data rate of 20 Mbps. Each channel carries a 128-byte FIFO, which buffers incoming and outgoing data to reduce CPU interrupt overhead in high-throughput serial links. It includes modem control, auto flow control, an IrDA encoder/decoder, and false start bit detection — the full feature set for industrial RS485 networks where collision avoidance and framing integrity matter.
36-ball TFBGA — reflow and board-fit checklist
Housed in a 36-TFBGA (3.5x3.5 mm) with 0.50 mm ball pitch, this package demands a controlled reflow profile. Check the MSL rating before the oven — a high-MSL part that skips the bake step risks popcorning during reflow, lifting balls off the pad. The 1.8 V supply rail keeps core power low, but the BGA's small footprint means the PCB fan-out must clear the inner balls. A 4-layer board with microvias is typical for this pitch class.