XR16C2850 -Dual UART with TX and RX FIFO Counters, 128-Bytes FIFO and Automatic RS-485 Half Duplex Control

XR16C2850
Dual UART with TX and RX FIFO Counters, 128-Bytes FIFO and Automatic RS-485 Half Duplex Control

Features

Added feature in devices with a top mark date code of "F2 YYWW" and newer:
- 5V tolerant inputs
- 0 ns address hold time (T_AH)
Pin-to-pin compatible and functionally compatible to Exar’s ST16C2550 and XR16L2750 and TI’s TL16C752B in the 48-TQFP package
Pin-alike Exar’s XR16L2750 and ST16C2550 48-TQFP package but with additional CLK8/16, CLKSEL and HDCNTL inputs
Two independent UART channels
- Register set compatible to 16C550
- Up to 6.25 Mbps at 5V, and 4 Mbps at 3.3V
- Transmit and Receive FIFOs of 128 bytes
- Programmable TX and RX FIFO Trigger Levels
- Transmit and Receive FIFO Level Counters
- Automatic Hardware (RTS/CTS) Flow Control
- Selectable Auto RTS Flow Control Hysteresis
- Automatic Software (Xon/Xoff) Flow Control
- Auto RS-485 Half-duplex Direction Control
- Wireless Infrared (IrDA 1.0) Encoder/Decoder
- Full modem interface
Device Identification and Revision
Crystal oscillator or external clock input
Industrial and commercial temperature ranges
48-TQFP and 44-PLCC packages
Pb-Free, RoHS Compliant Versions Offered

Applications

Portable Appliances
Telecommunication Network Routers
Ethernet Network Routers
Cellular Data Devices
Factory Automation and Process Controls

Description

The XR16C2850 (2850) is an enhanced dual universal asynchronous receiver and transmitter (UART). Enhanced features include 128 bytes of TX and RX FIFOs, programmable TX and RX FIFO trigger level, FIFO level counters, automatic (RTS/CTS) hardware and (Xon/Xoff) software flow control, automatic RS-485 half duplex direction control output and data rates up to 6.25 Mbps at 5V and 8X sampling clock. Onboard status registers provide the user with operational status and data error flags. An internal loopback capability allows system diagnostics. The 2850 has a full modem interface and can operate at 2.97V to 5.5V and is pin-to-pin compatible to Exar’s ST16C2550 and XR16L2750 except the 48-TQFP package. The 2850 register set is compatible to the industry standard ST16C2550 and is available in 48-pin TQFP and 44-pin PLCC packages.

For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

Part Number	Pkg Code	RoHS	Min Temp. (°C)	Max Temp. (°C)	Status	Buy Now	Order Samples
XR16C2850CJ-F	PLCC44		0	70	Active
XR16C2850CM-F	TQFP48		0	70	Active
XR16C2850IJ-F	PLCC44		-40	85	Active
XR16C2850IM-F	TQFP48		-40	85	Active

Part Status Legend

Active - the part is released for sale, standard product.

EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.

CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.

PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.

OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.

NRND (Not Recommended for New Designs) - the part is not recommended for new designs.

Specifications
CH	2
CPUInterface	Intel
Data Rate@5/3.3/2.5V	6.2/4.0/na @8X
Tx/RxFIFO(Bytes)	128/128
Tx/RxFIFOCtrs	Yes
Tx/RxFIFOINT Trig	Program/ Program
AutoRTS/CTS	Yes
IrDaSup	Yes
5VTolInputs	Yes
Sup V	2.97-5.5
Pkgs	PLCC-44 TQFP-48

Documents

	Software Drivers
	Linux 2.6.13 Drivers Version 1.0.0 December 2009 10.84 KB
	Linux 2.6.18 Drivers Version 1.0.0 December 2009 12.11 KB
	Windows XP & 2000 Drivers Version 1.3.0.0 December 2009 61.02 KB

	Datasheets
	Datasheet Version 2.1.3 November 2005 891.53 KB

	Application Notes
	DAN-130, EXAR's ST16C2550 vs. TL16C752B Version 1.0.0 June 2002 119.34 KB
	DAN-107, Interfacing 16Cxxx UARTs to a CPU Version 1.0.0 August 1999 32.43 KB
	DAN-160, Migrating from XR16C2850 to XR16L2750 Version 1.0.0 June 2002 22.18 KB
	DAN-161, Migrating from XR16C2850 to XR16L2751 Version 1.0.0 August 2002 23.00 KB
	DAN-190, Exar UARTs in RS-485 Applications Version 1.0.0 April 2008 147.31 KB
	AN-204, UART Sleep Mode Version 1.0.0 June 2010 511.72 KB

	Schematics
	PCI Eval Board Schematic Version 1.1.0 July 2007 167.82 KB
	ISA Eval Board Schematic Version 1.4.0 August 2007 109.05 KB

	Manuals
	Evaluation Board User's Manual Version 1.3.0 August 2003 24.69 KB