SC16C550B 5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs Rev. 05 1 October 2008 Product data sheet 1. General description The SC16C550B is a 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 3 Mbit/s. The SC16C550B is pin compatible with the ST16C550, TL16C550 and PC16C550, and it will power-up to be functionally equivalent to the 16C450. The SC16C550B also provides DMA mode data transfers through FIFO trigger levels and the TXRDY and RXRDY signals (TXRDY and RXRDY are not supported in the HVQFN32 package). On-board status registers provide the user with error indications, operational status, and modem interface control. System interrupts may be tailored to meet user requirements. An internal loopback capability allows on-board diagnostics. The SC16C550B operates at 5 V, 3.3 V and 2.5 V, and the Industrial temperature range, and is available in plastic HVQFN32, DIP40, PLCC44 and LQFP48 packages. 2. Features n 5 V, 3.3 V and 2.5 V operation n Industrial temperature range n After reset, all registers are identical to the typical 16C450 register set n Capable of running with all existing generic 16C450 software n Pin compatibility with the industry-standard ST16C450/550, TL16C450/550, PC16C450/550 n Up to 3 Mbit/s transmit/receive operation at 5 V, 2 Mbit/s at 3.3 V, and 1 Mbit/s at 2.5 V 1 n 5 V tolerant on input only pins n 16 byte transmit FIFO n 16 byte receive FIFO with error ags n Programmable auto-RTS and auto-CTS u In auto-CTS mode, CTS controls transmitter u In auto-RTS mode, RX FIFO contents and threshold control RTS n Automatic hardware ow control n Software selectable baud rate generator n Four selectable Receive FIFO interrupt trigger levels n Standard modem interface n Standard asynchronous error and framing bits (Start, Stop, and Parity Overrun Break) n Independent receiver clock input n Transmit, Receive, Line Status, and Data Set interrupts independently controlled 1. For data bus pins D7 to D0, see Table 24 Limiting values.SC16C550B NXP Semiconductors 5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs n Fully programmable character formatting: u 5, 6, 7, or 8-bit characters u Even, odd, or no-parity formats 1 u 1, 1 , or 2-stop bit 2 u Baud generation (up to 3 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, RI, DCD, DSR, DTR, RTS) 3. Ordering information Table 1. Ordering information Industrial: V = 2.5 V, 3.3 V or 5 V 10 % T = - 40 C to +85 C. DD amb Type number Package Name Description Version SC16C550BIA44 PLCC44 plastic leaded chip carrier 44 leads SOT187-2 SC16C550BIBS HVQFN32 plastic thermal enhanced very thin quad at package no leads SOT617-1 32 terminals body 5 5 0.85 mm SC16C550BIB48 LQFP48 plastic low prole quad at package 48 leads body 7 7 1.4 mm SOT313-2 SC16C550BIN40 DIP40 plastic dual in-line package 40 leads (600 mil) SOT129-1 SC16C550B 5 NXP B.V. 2008. All rights reserved. Product data sheet Rev. 05 1 October 2008 2 of 48