General description

The SC16IS740/750/760 is a slave I2C-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 SC16IS750 and SC16IS760 also provide the application with 8 additional programmable I/O pins. The device comes in very small HVQFN24, TSSOP24 (SC16IS750/760) and TSSOP16 (SC16IS740) packages, which makes it ideally suitable for handheld, battery operated applications. This family of products enables seamless protocol conversion from I2C-bus or SPI to and RS-232/RS-485 and are fully bidirectional.

The SC16IS760 differs from the SC16IS750 in that it supports SPI clock speeds up to 15 Mbit/s instead of the 4 Mbit/s supported by the SC16IS750, and in that it supports IrDA SIR up to 1.152 Mbit/s. In all other aspects, the SC16IS760 is functionally and electrically the same as the SC16IS750. The SC16IS740 is functionally and electrically identical to the SC16IS750, with the exception of the programmable I/O pins which are only present on the SC16IS750.

The SC16IS740/750/760’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 SC16IS740/750/760 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.

Features and benefits

General features

■ Single full-duplex UART

■ Selectable I2C-bus or SPI interface

■ 3.3 V or 2.5 V operation

■ Industrial temperature range: −40 °C to +85 °C

■ 64 bytes FIFO (transmitter and receiver)

■ Fully compatible with industrial standard 16C450 and equivalent

■ Baud rates up to 5 Mbit/s in 16x 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)

■ Up to eight programmable I/O pins (SC16IS750 and SC16IS760 only)

■ RS-485 driver direction control via RTS signal

■ RS-485 driver direction control inversion

■ Built-in IrDA encoder and decoder interface

■ SC16IS750 supports IrDA SIR with speeds up to 115.2 kbit/s

■ SC16IS760 supports IrDA SIR with speeds up to 1.152 Mbit/s1

■ Software reset

■ Transmitter and receiver can be enabled/disabled independent of each other

■ Receive and Transmit FIFO levels

■ Programmable special character detection

■ Fully programmable character formatting

◆ 5-bit, 6-bit, 7-bit or 8-bit character

◆ Even, odd, or no parity

◆ 1, 1 1/2, or 2 stop bits

■ Line break generation and detection

■ Internal Loopback mode

■ Sleep current less than 30 μA at 3.3 V

■ Industrial and commercial temperature ranges

■ Available in HVQFN24, TSSOP24 (SC16IS750/760) and TSSOP16 (SC16IS740)

packages

I2C-bus features

■ Noise filter on SCL/SDA inputs

■ 400 kbit/s maximum speed

■ Compliant with I2C-bus fast speed

■ Slave mode only

SPI features

■ SC16IS750 supports 4 Mbit/s maximum SPI clock speed

■ SC16IS760 supports 15 Mbit/s maximum SPI clock speed

■ Slave mode only

■ SPI Mode 0

Applications

■ Factory automation and process control

■ Portable and battery operated devices

■ Cellular data devices