5 V, 3.3 V and 2.5 V Dual UART, 5 Mbit/s (max.), with 16 B FIFOs | NXP Semiconductors

5 V, 3.3 V and 2.5 V Dual UART, 5 Mbit/s (max.), with 16 B FIFOs | NXP Semiconductors

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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 RXRDYn and TXRDYn 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 specific 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.

Application Notes

Product Details

Features

Key Features

2 channel UART
5 V, 3.3 V and 2.5 V operation
5 V tolerant on input only pins
Industrial temperature range
Pin and functionally compatible to 16C2450 and software compatible with INS8250, SC16C550
Up to 5 Mbit/s data rate at 5 V and 3.3 V and 3 Mbit/s at 2.5 V
16-byte transmit FIFO to reduce the bandwidth requirement of the external CPU
16-byte receive FIFO with error flags to reduce the bandwidth requirement of the external CPU
Independent transmit and receive UART control
Four selectable receive FIFO interrupt trigger levels
Software selectable baud rate generator
Standard asynchronous error and framing bits (Start, Stop and Parity Overrun Break)
Transmit, receive, line status and data set interrupts independently controlled
False start-bit detection
Complete status reporting capabilities
3-state output TTL drive capabilities for bidirectional data bus and control bus
Line break generation and detection
Internal diagnostic capabilities. Loopback controls for communications link fault isolation
Prioritized interrupt system controls
Modem control functions (CTS, RTS, DSR, DTR, RI, DCD)

Fully Programmable Character Formatting

5-bit, 6-bit, 7-bit or 8-bit characters
Even, odd or no-parity formats
1, 1 1/2 or 2-stop bit
Baud generation (DC to 5 Mbit/s)

Buy/Parametrics

Part Show description	CAD Model	f_max (MHz)	Channel	Features	Other features	Operating Temperature (°C)	Data transfer rate (Mb/s)	Function
SC16C2550BIB48 Data Sheet Replacement part(s): SC16C652BIBS		48	2	16 Bytes FIFO / DMA mode	—	45	3	SC16C2550B
SC16C2550BIA44 Data Sheet		48	2	16 Bytes FIFO / DMA mode / HW & SW Flow Control	4-level receive trigger level	45	3	SC16C2550B
SC16C2550BIBS Data Sheet Replacement part(s): SC16C2550BIB48		—	2	—	—	—	—	—

Design Resources

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