1. General description
The SC16IS741A
1
is a slave I
2
C-bus/SPI interface to a single-channel high performance
UART. It offers data rates up to 5 Mbit/s and guarantees low operating and sleeping
current. The device comes in the TSSOP16 package, which makes it ideally suitable for
handheld, battery operated applications. This device enables seamless protocol
conversion from I
2
C-bus or SPI to and RS-232/RS-485 and are fully bidirectional.
The SC16IS741A’s internal register set is backward-compatible with the widely used and
widely popular 16C450. This allows the software to be easily written or ported from
another platform.
The SC16IS741A also provides additional advanced features such as auto hardware and
software flow control, automatic RS-485 support, and software reset. This allows the
software to reset the UART at any moment, independent of the hardware reset signal.
2. Features and benefits
2.1 General features
Single full-duplex UART
Selectable I
2
C-bus or SPI interface
3.3 V or 2.5 V operation
Industrial temperature range: 40 C to +95 C
64 bytes FIFO (transmitter and receiver)
Fully compatible with industrial standard 16C450 and equivalent
Baud rates up to 5 Mbit/s in 16 clock mode
Auto hardware flow control using RTS
/CTS
Auto software flow control with programmable Xon/Xoff characters
Single or double Xon/Xoff characters
Automatic RS-485 support (automatic slave address detection)
RS-485 driver direction control via RTS
signal
RS-485 driver direction control inversion
Built-in IrDA encoder and decoder interface
Software reset
Transmitter and receiver can be enabled/disabled independent of each other
Receive and Transmit FIFO levels
Programmable special character detection
SC16IS741A
Single UART with I
2
C-bus/SPI interface, 64 bytes of transmit
and receive FIFOs, IrDA SIR built-in support
Rev. 1 — 18 March 2013 Product data sheet
1. See Section 10.3.1 for the description of the differences between SC16IS741 and SC16IS741A.
