SC16C554B/554DB 5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs Rev. 4 8 June 2010 Product data sheet 1. General description The SC16C554B/554DB is a 4-channel Universal Asynchronous Receiver and Transmitter (QUART) 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. It comes with an Intel (16 mode) or Motorola (68 mode) interface. The SC16C554B/554DB is pin compatible with the ST16C554 and TL16C554 and it will power-up to be functionally equivalent to the 16C454. Programming of control registers enables the added features of the SC16C554B/554DB. Some of these added features are the 16-byte receive and transmit FIFOs, four receive trigger levels. The SC16C554B/554DB also provides DMA mode data transfers through FIFO trigger levels and the TXRDY and RXRDY signals. (TXRDY and RXRDY signals are not available in the HVQFN48 package.) 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 SC16C554B/554DB operates at 5 V, 3.3 V and 2.5 V, and the industrial temperature range, and is available in plastic PLCC68, LQFP64, LQFP80, and HVQFN48 packages. On the HVQFN48 package only, channel C has all the modem pins. Channels A and B have only RTSn and CTSn pins and channel D does not have any modem pin. 2. Features and benefits 4 channel UART 5 V, 3.3 V and 2.5 V operation Industrial temperature range (40 C to +85 C) The SC16C554B is pin and software compatible with the industry-standard ST16C454/554, ST68C454/554, ST16C554, TL16C554 The SC16C554DB is pin and software compatible with ST16C554D, and software compatible with ST16C454/554, ST16C554, TL16C554 Up to 5 Mbit/s data rate at 5 V and 3.3 V, and 3 Mbit/s at 2.5 V 1 5 V tolerant on input only pins 16-byte transmit FIFO 16-byte receive FIFO with error flags Programmable auto-RTS and auto-CTS In auto-CTS mode, CTS controls transmitter In auto-RTS mode, RX FIFO contents and threshold control RTS 1. For data bus pins D7 to D0, see Table 24 Limiting values.SC16C554B/554DB NXP Semiconductors 5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs Automatic hardware flow control (RTS/CTS) Software selectable baud rate generator Four selectable Receive FIFO interrupt trigger levels Standard modem interface Standard asynchronous error and framing bits (Start, Stop, and Parity Overrun Break) Transmit, Receive, Line Status, and Data Set interrupts independently controlled Fully programmable character formatting: 5-bit, 6-bit, 7-bit, or 8-bit characters Even, odd, or no-parity formats 1 1, 1 , or 2-stop bit 2 Baud generation (DC to 5 Mbit/s) 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, CD). 3. Ordering information Table 1. Ordering information Type number Package Name Description Version SC16C554BIB64 LQFP64 plastic low profile quad flat package 64 leads body 10 10 1.4 mm SOT314-2 SC16C554BIB80 LQFP80 plastic low profile quad flat package 80 leads body 12 12 1.4 mm SOT315-1 SC16C554BIBM LQFP64 plastic low profile quad flat package 64 leads body 7 7 1.4 mm SOT414-1 SC16C554BIBS HVQFN48 plastic thermal enhanced very thin quad flat package no leads SOT778-3 48 terminals body 6 6 0.85 mm SC16C554DBIA68 PLCC68 plastic leaded chip carrier 68 leads SOT188-2 SC16C554DBIB64 LQFP64 plastic low profile quad flat package 64 leads body 10 10 1.4 mm SOT314-2 SC16C554B 554DB All information provided in this document is subject to legal disclaimers. NXP B.V. 2010. All rights reserved. Product data sheet Rev. 4 8 June 2010 2 of 58