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Exar Corporation
Exar Corporation

XR16M2750 Datasheet Preview

XR16M2750 Datasheet

HIGH PERFORMANCE DUART

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XR16M2750 pdf
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PRELIMINARY
XR16M2750
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
JUNE 2007
REV. P1.0.0
GENERAL DESCRIPTION
The XR16M27501 (M2750) is a high performance
dual universal asynchronous receiver and transmitter
(UART) with 64 byte TX and RX FIFOs. The device
operates from 1.62 to 3.6 volts and is pin-to-pin
compatible to Exar’s ST16C2550 and XR16V2750.
The M2750 register set is identical to the XR16V2750
and is compatible to the ST16C2550 and the
XR16C2850 enhanced features. It supports the
Exar’s enhanced features of programmable FIFO
trigger level and FIFO level counters, automatic
hardware (RTS/CTS) and software flow control,
automatic RS-485 half duplex direction control output
and a complete modem interface. Onboard registers
provide the user with operational status and data
error flags. An internal loopback capability allows
system diagnostics. Independent programmable
baud rate generators are provided in each channel to
select data rates up to 8 Mbps at 3.3 Volt and 8X
sampling clock. The M2750 is available in 48-pin
TQFP and 32-pin QFN packages.
NOTE: 1 Covered by U.S. Patent #5,649,122
APPLICATIONS
Portable Appliances
Telecommunication Network Routers
Ethernet Network Routers
Cellular Data Devices
Factory Automation and Process Controls
FEATURES
1.62 to 3.6 Volt Operation
Pin-to-pin compatible to Exar’s XR16V2750 and
TI’s TL16C752B in the 48-TQFP package
Two independent UART channels
Register set compatible to XR16V2750
Data rate of up to 8 Mbps at 3.3 V, 6.25 Mbps
at 2.5 V and 4 Mbps at 1.8 V with 8X sampling
rate
Fractional Baud Rate Generator
Transmit and Receive FIFOs of 64 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
Automatic RS-485 Half-duplex Direction
Control Output via RTS#
Wireless Infrared (IrDA 1.0) Encoder/Decoder
Automatic sleep mode
Full modem interface
Device Identification and Revision
Crystal oscillator (up to 32MHz) or external clock
(upto 64MHz) input
48-TQFP and 32-QFN packages
FIGURE 1. XR16M2750 BLOCK DIAGRAM
A2:A0
D7:D0
IOR#
IOW#
CSA#
CSB#
INTA
INTB
TXRDYA#
TXRDYB#
RXRDYA#
RXRDYB#
Reset
8-bit Data
Bus
Interface
UART Channel A
UART 64 Byte TX FIFO
Regs
TX & RX
IR
ENDEC
BRG
64 Byte RX FIFO
UART Channel B
(same as Channel A)
Crystal Osc/Buffer
1.62 to 3.6 Volt VCC
GND
TXA, RXA, DTRA#,
DSRA#, RTSA#,
DTSA#, CDA#, RIA#,
OP2A#
TXB, RXB, DTRB#,
DSRB#, RTSB#,
CTSB#, CDB#, RIB#,
OP2B#
XTAL1
XTAL2
2750BLK
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com



Exar Corporation
Exar Corporation

XR16M2750 Datasheet Preview

XR16M2750 Datasheet

HIGH PERFORMANCE DUART

No Preview Available !

XR16M2750 pdf
www.DXaRta1S6hMee2t74U5.0com
PRELIMINARY
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
FIGURE 2. PIN OUT ASSIGNMENT
D5 1
D6 2
D7 3
RXB 4
RXA 5
TXRDYB# 6
TXA 7
TXB 8
OP2B# 9
CSA# 10
CSB# 11
NC 12
XR16M2750
48-pin TQFP
36 RESET
35 DTRB#
34 DTRA#
33 RTSA#
32 OP2A#
31 RXRDYA#
30 INTA
29 INTB
28 A0
27 A1
26 A2
25 NC
REV. P1.0.0
D6
D7
RXB
RXA
TXA
TXB
CSA#
CSB#
1
2
3
4
5
6
7
8
XR16M2750
32-pin QFN
24 RESET
23 RTSA#
22 INTA
21 INTB
20 A0
19 A1
18 A2
17 NC
ORDERING INFORMATION
PART NUMBER
XR16M2750IL32
XR16M2750IM48
PACKAGE
32-pin QFN
48-Lead TQFP
OPERATING TEMPERATURE RANGE
-40°C to +85°C
-40°C to +85°C
DEVICE STATUS
Active
Active
2


Part Number XR16M2750
Description HIGH PERFORMANCE DUART
Maker Exar Corporation
Total Page 30 Pages
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