SC16C2550B 5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs Rev. 05 12 January 2009 Product data sheet 1. General description The SC16C2550B is a two channel Universal Asynchronous Receiver and Transmitter (UART) used for serial data communications. Its principal function is to convert parallel data into serial data and vice versa. The UART can handle serial data rates up to 5 Mbit/s. The SC16C2550B is pin compatible with the ST16C2550. It will power-up to be functionally equivalent to the 16C2450. The SC16C2550B provides enhanced UART functions with 16-byte FIFOs, modem control interface, DMA mode data transfer. The DMA mode data transfer is controlled by the FIFO trigger levels and the TXRDYn and RXRDYn signals. On-board status registers provide the user with error indications and operational status. System interrupts and modem control features may be tailored by software to meet specic user requirements. An internal loopback capability allows on-board diagnostics. Independent programmable baud rate generators are provided to select transmit and receive baud rates. The SC16C2550B operates at 5 V, 3.3 V and 2.5 V and the industrial temperature range, and is available in plastic PLCC44, LQFP48, DIP40 and HVQFN32 packages. 2. Features n 2 channel UART n 5 V, 3.3 V and 2.5 V operation 1 n 5 V tolerant on input only pins n Industrial temperature range n Pin and functionally compatible to 16C2450 and software compatible with INS8250, SC16C550 n Up to 5 Mbit/s data rate at 5 V and 3.3 V and 3 Mbit/s at 2.5 V n 16-byte transmit FIFO to reduce the bandwidth requirement of the external CPU n 16-byte receive FIFO with error ags to reduce the bandwidth requirement of the external CPU n Independent transmit and receive UART control n Four selectable Receive FIFO interrupt trigger levels n Software selectable baud rate generator n Standard asynchronous error and framing bits (Start, Stop and Parity Overrun Break) n Transmit, Receive, Line Status and Data Set interrupts independently controlled 1. For data bus pins D7 to D0, see Table 23 Limiting values.SC16C2550B NXP Semiconductors 5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs n Fully programmable character formatting: u 5-bit, 6-bit, 7-bit or 8-bit characters u Even, odd or no-parity formats 1 u 1, 1 or 2-stop bit 2 u Baud generation (DC to 5 Mbit/s) n False start-bit detection n Complete status reporting capabilities n 3-state output TTL drive capabilities for bidirectional data bus and control bus n Line break generation and detection n Internal diagnostic capabilities: u Loopback controls for communications link fault isolation n Prioritized interrupt system controls n Modem control functions (CTS, RTS, DSR, DTR, RI, DCD) 3. Ordering information Table 1. Ordering information Type number Package Name Description Version SC16C2550BIA44 PLCC44 plastic leaded chip carrier 44 leads SOT187-2 SC16C2550BIBS HVQFN32 plastic thermal enhanced very thin quad at package no leads SOT617-1 32 terminals body 5 5 0.85 mm SC16C2550BIB48 LQFP48 plastic low prole quad at package 48 leads body 7 7 1.4 mm SOT313-2 SC16C2550BIN40 DIP40 plastic dual in-line package 40 leads (600 mil) SOT129-1 3.1 Ordering options Table 2. Ordering options Type number Topside mark SC16C2550BIA44 SC16C2550BIA44 SC16C2550BIBS 2550B SC16C2550BIB48 16C2550B SC16C2550BIN40 SC16C2550BIN40 SC16C2550B 5 NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 12 January 2009 2 of 43