參數(shù)資料
      型號(hào): XR16L2450IJ-F
      廠商: Exar Corporation
      文件頁(yè)數(shù): 1/30頁(yè)
      文件大小: 0K
      描述: IC UART FIFO 1B DUAL 44PLCC
      標(biāo)準(zhǔn)包裝: 27
      特點(diǎn): *
      通道數(shù): 2,DUART
      FIFO's: 1 字節(jié)
      規(guī)程: RS232
      電源電壓: 2.25 V ~ 5.5 V
      帶故障啟動(dòng)位檢測(cè)功能:
      帶調(diào)制解調(diào)器控制功能:
      帶CMOS:
      安裝類型: 表面貼裝
      封裝/外殼: 44-LCC(J 形引線)
      供應(yīng)商設(shè)備封裝: 44-PLCC(16.59x16.59)
      包裝: 管件
      Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
      xr
      XR16L2450
      2.25V TO 5.5V DUART
      MAY 2005
      REV. 1.1.1
      GENERAL DESCRIPTION
      The XR16L2450 (L2450) is a dual universal asyn-
      chronous receiver and transmitter (UART). The
      XR16L2450
      is
      an
      improved
      version
      of
      the
      ST16C2450 with lower operating voltage and 5 volt
      tolerant inputs. The L2450 provides enhanced UART
      functions, a modem control interface and data rates
      up to 1.5 Mbps. Onboard status registers provide the
      user with error indications and operational status. In-
      dependent programmable baud rate generators are
      provided to select transmit and receive clock rates up
      to 1.5 Mbps. An internal loopback capability allows
      onboard diagnostics. The L2450 is available in a 44-
      pin PLCC and 48-pin TQFP packages. The L2450 is
      fabricated in an advanced CMOS process capable of
      operating from 2.25 volt to 5.5 volt power supply with
      5 volt tolerant inputs.
      APPLICATIONS
      Portable Appliances
      Telecommunication Network Routers
      Ethernet Network Routers
      Cellular Data Devices
      Factory Automation and Process Controls
      FEATURES
      2.25 to 5.5 Volt Operation
      5 Volt Tolerant Inputs
      Pin-to-pin compatible to Exar’s ST16C2450,
      ST16C2550,
      XR16L2550,
      XR16L2750
      and
      XR16C2850
      Pin-to-pin compatible to TI’s TL16C752B on the 48-
      TQFP package
      2 independent UART channels
      Up to 1.5 Mbps data rate with a 24 MHz crystal
      oscillator or external clock frequency
      1 byte Transmit FIFO
      1 byte Receive FIFO with error tags
      Status report registers
      Modem control signals (CTS#, RTS#, DSR#,
      DTR#, RI#, CD#)
      Programmable character lengths (5, 6, 7, 8)
      with even, odd, or no parity
      Crystal oscillator or external clock input
      TTL compatible inputs, outputs
      Industrial temperature ranges
      48-TQFP and 44-PLCC packages
      FIGURE 1. XR16L2450 BLOCK DIAGRAM
      XTAL1
      XTAL2
      Crystal Osc/Buffer
      TXA
      RTSA#, CTSA#,
      DTRA#, DSRA#,
      CDA#, RIA#, OP2A#
      8-bit Data
      Bus
      Interface
      UART Channel A
      BRG
      THR
      UART
      Regs
      2.25 to 5.5 Volt VCC
      UART Channel B
      (same as Channel A)
      A2:A0
      D7:D0
      CSA#
      CSB#
      INTA
      INTB
      IOW#
      IOR#
      Reset
      RHR
      Modem I/Os
      RXA
      TXB
      RTSB#, CTSB#,
      DTRB#, DSRB#,
      CDB#, RIB#, OP2B#
      RXB
      *5V Tolerant inputs
      相關(guān)PDF資料
      PDF描述
      XR16L2550IJ-F IC UART FIFO 16B DUAL 44PLCC
      XR16L2551IM-F IC UART FIFO 16B DUAL 48TQFP
      XR16L2552IJ-F IC UART FIFO 16B DUAL 44PLCC
      XR16L2750IJ-F IC UART FIFO 64B DUAL 44PLCC
      XR16L2751CMTR-F IC UART FIFO 64B DUAL 48TQFP
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      參數(shù)描述
      XR16L2450IM 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART
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