SC16C750B 5 V, 3.3 V and 2.5 V UART with 64-byte FIFOs Rev. 05 17 October 2008 Product data sheet 1. General description The SC16C750B 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 SC16C750B is pin compatible with the TL16C750 and it will power-up to be functionally equivalent to the 16C450. Programming of control registers enables the added features of the SC16C750B. Some of these added features are the 64-byte receive and transmit FIFOs, automatic hardware ow control. The selectable auto-ow control feature signicantly reduces software overload and increases system efciency while in FIFO mode by automatically controlling serial data ow using RTS output and CTS input signals. The SC16C750B also provides DMA mode data transfers through FIFO trigger levels and the TXRDY and RXRDY 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 SC16C750B operates at 5 V, 3.3 V and 2.5 V, the industrial temperature range and is available in plastic PLCC44, LQFP64, and HVQFN32 packages. 2. Features n Single channel n 5 V, 3.3 V and 2.5 V operation 1 n 5 V tolerant on input only pins n Industrial temperature range (- 40 C to +85 C) 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. Software compatible with SC16C750 and TL16C750 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 n 64-byte transmit FIFO n 64-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, receive FIFO contents and threshold control RTS n Automatic hardware ow control n Software selectable baud rate generator 1. For data bus pins D7 to D0, see Table 24 Limiting values.SC16C750B NXP Semiconductors 5 V, 3.3 V and 2.5 V UART with 64-byte FIFOs n Four selectable Receive interrupt trigger levels n Standard modem interface n Sleep mode 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 n Fully programmable character formatting: u 5-bit, 6-bit, 7-bit, or 8-bit characters u Even, odd, or no-parity formats 1 u 1, 1 , or 2-stop bit 2 u Baud generation (DC 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, RTS, DSR, DTR, RI, DCD) 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. CC amb Type number Package Name Description Version SC16C750BIA44 PLCC44 plastic leaded chip carrier 44 leads SOT187-2 SC16C750BIB64 LQFP64 plastic low prole quad at package 64 leads 10 10 1.4 mm SOT314-2 SC16C750BIBS HVQFN32 plastic thermal enhanced very thin quad at package no leads SOT617-1 32 terminals body 5 5 0.85 mm SC16C750B 5 NXP B.V. 2008. All rights reserved. Product data sheet Rev. 05 17 October 2008 2 of 44