SC16C751B Datasheet, PDF(1/32 Page) NXP Semiconductors – 5 V, 3.3 V and 2.5 V UART with 64-byte FIFOs

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SC16C751B Datasheet, PDF (1/32 Pages) NXP Semiconductors – 5 V, 3.3 V and 2.5 V UART with 64-byte FIFOs

SC16C751B

5 V, 3.3 V and 2.5 V UART with 64-byte FIFOs

Rev. 02 â 10 October 2008

Product data sheet

1. General description

The SC16C751B 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 5 Mbit/s.

The SC16C751B is functionally equivalent to the SC16C750B, and requires a special

software initialization sequence to conï¬gure the device to operate (see Section 6.6).

Programming of control registers enables the added features of the SC16C751B. Some of

these added features are the 64-byte receive and transmit FIFOs, automatic hardware

ï¬ow control. The selectable auto-ï¬ow control feature signiï¬cantly reduces software

overload and increases system efï¬ciency while in FIFO mode by automatically controlling

serial data ï¬ow using RTS output and CTS input signals. 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 SC16C751B operates at 5 V, 3.3 V and 2.5 V, the industrial temperature range and is

available in the plastic HVQFN24 package.

2. Features

I Single channel

I 5 V, 3.3 V and 2.5 V operation

I 5 V tolerant on input only pins1

I Industrial temperature range (â40 Â°C to +85 Â°C)

I After reset, all registers are identical to the typical 16C450 register set

I Capable of running with all existing generic 16C450 software

I Up to 5 Mbit/s transmit/receive operation at 5 V, 3.3 V; 3 Mbit/s at 2.5 V

I 64-byte transmit FIFO

I 64-byte receive FIFO with error ï¬ags

I Programmable auto-RTS and auto-CTS

N In auto-CTS mode, CTS controls transmitter

N In auto-RTS mode, receive FIFO contents and threshold control RTS

I Automatic hardware ï¬ow control

I Software selectable baud rate generator

I Four selectable receive interrupt trigger levels

I Standard modem interface

I Sleep mode

1. For data bus pins D7 to D0, see Table 22 âLimiting valuesâ.

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