參數(shù)資料
型號(hào): XR16M2551IL32TR-F
廠商: Exar Corporation
文件頁(yè)數(shù): 1/51頁(yè)
文件大?。?/td> 0K
描述: IC UART FIFO 16B DUAL 32QFN
標(biāo)準(zhǔn)包裝: 3,000
特點(diǎn): *
通道數(shù): 2,DUART
FIFO's: 16 字節(jié)
規(guī)程: RS232,RS422
電源電壓: 1.62 V ~ 3.63 V
帶自動(dòng)流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動(dòng)位檢測(cè)功能:
帶調(diào)制解調(diào)器控制功能:
安裝類(lèi)型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 32-QFN 裸露焊盤(pán)(5x5)
包裝: 帶卷 (TR)
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
XR16M2551
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE
MAY 2007
REV. 1.0.2
GENERAL DESCRIPTION
The XR16M25511 (M2551) is a high performance
dual universal asynchronous receiver and transmitter
(UART) with 16 byte TX and RX FIFOs. The device
operates from 1.62 to 3.63 volts and is pin-to-pin
compatible to the XR16L2551 and XR16V2551. The
M2551 includes 2 additional capabilities over the
XR16M2550: Intel and Motorola data bus selection
and a “PowerSave” mode to minimize the sleep
current. It supports Exar’s enhanced features of
selectable FIFO trigger level, automatic hardware
(RTS/CTS) and software flow control, and a complete
modem interface. An internal loopback capability
allows
system
diagnostics.
Independent
programmable fractional baud rate generators are
provided in each channel to select data rates up to 16
Mbps at 3.3 Volt and 4X sampling clock. The M2551
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 3.63 Volt Operation
Pin-to-pin compatible to Exar’s XR16V2551 and the
XR16L2551
Two independent UART channels
Register set is 16550 compatible
Data rate of up to 16 Mbps at 3.3 V
Data rate of up to 12.5 Mbps at 2.5 V
Data rate of up to 8 Mbps at 1.8V
Fractional Baud Rate Generator
Transmit and Receive FIFOs of 16 bytes
Selectable TX and RX FIFO Trigger Levels
Automatic Hardware (RTS/CTS) Flow Control
Automatic Software (Xon/Xoff) Flow Control
Wireless Infrared (IrDA 1.0) Encoder/Decoder
Automatic sleep mode with wake-up interrupt
Full modem interface
PowerSave Feature reduces sleep current to 15 A
Device Identification and Revision
Crystal oscillator (up to 24MHz) or external clock
(up to 64MHz) input
48-TQFP and 32-QFN packages
FIGURE 1. XR16M2551 BLOCK DIAGRAM
XTAL1
XTAL2
Crystal Osc/Buffer
TXA, RXA, DTRA#,
DSRA#, RTSA#,
DTSA#, CDA#, RIA#,
OP2A#
Intel or
Motorola
Data Bus
Interface
UART Channel A
16 Byte TX FIFO
16 Byte RX FIFO
BRG
IR
ENDEC
TX & RX
UART
Regs
1.62 to 3.63V VCC
GND
TXB, RXB, DTRB#,
DSRB#, RTSB#,
CTSB#, CDB#, RIB#,
OP2B#
UART Channel B
(same as Channel A)
A2:A0
D7:D0
CSA# (CS#)
16/68#
CSB# (A3)
INTA (IRQ#)
INTB (logic 0)
PwrSave
IOW# (R/W#)
IOR# (VCC)
Reset (Reset#)
CLKSEL
TXRDYA#
TXRDYB#
RXRDYA#
RXRDYB#
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