参数资料
型号: XR16V2651IL-F
厂商: Exar Corporation
文件页数: 1/51页
文件大小: 0K
描述: IC UART FIFO 32B DUAL 32QFN
标准包装: 490
特点: *
通道数: 2,DUART
FIFO's: 32 字节
规程: RS232,RS422
电源电压: 2.25 V ~ 3.6 V
带自动流量控制功能:
带IrDA 编码器/解码器:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘
供应商设备封装: 32-QFN 裸露焊盘(5x5)
包装: 托盘
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
XR16V2651
HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE
MAY 2007
REV. 1.0.2
GENERAL DESCRIPTION
The XR16V26511 (V2651) is a high performance dual
universal asynchronous receiver and transmitter
(UART) with 32 byte TX and RX FIFOs. The device
operates from 2.25 to 3.6 volts with 5 Volt tolerant
inputs and is pin-to-pin and software compatible to
Exar’s XR16V2551 and XR16L2551. The device
includes
2
additional
capabilities
over
the
XR16V2650: Intel and Motorola data bus selection
and a “PowerSave” mode to further reduce sleep
current to a minimum during sleep mode. It supports
the 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 V2651 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
2.25 to 3.6 Volt Operation
5 Volt Tolerant Inputs
Pin-to-pin compatible to Exar’s XR16L2751 in the
48-TQFP package
Two independent UART channels
Register set identical to 16V2650
Data rate of up to 16 Mbps at 3.3 V, and 12.5
Mbps at 2.5 V with 4X sampling rate
Fractional Baud Rate Generator
Transmit and Receive FIFOs of 32 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 32MHz) or external clock
(up to 64MHz) input
48-TQFP and 32-QFN packages
FIGURE 1. XR16V2651 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
32 Byte TX FIFO
32 Byte RX FIFO
BRG
IR
ENDEC
TX & RX
UART
Regs
2.25 to 3.6V VCC
GND
*5 Volt Tolerant Inputs
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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