参数资料
型号: XR88C681J-F
厂商: Exar Corporation
文件页数: 50/101页
文件大小: 0K
描述: IC UART CMOS DUAL 44PLCC
标准包装: 27
特点: *
通道数: 2,DUART
FIFO's: 1 字节,3 字节
电源电压: 4.75 V ~ 5.25 V
带并行端口:
带CMOS:
安装类型: 表面贴装
封装/外壳: 44-LCC(J 形引线)
供应商设备封装: 44-PLCC(16.59x16.59)
包装: 管件
其它名称: 1016-1329
XR88C681
52
Rev. 2.11
XR88C681
X1
X2
C1
C2
R1
R2
3.6864MHz
Parallel Resonant Crystal
C1: 10pF + (Stray < 5pF)
C2: 10pF + (Stray < 5pF)
R1: 100ohm
R2: 100ohm
Figure 25. A Recommended Schematic for the XTAL Oscillator Circuitry
Note:
The user also has an option to drive the Oscillator Circuit with a TTL input signal, in lieu of using a crystal oscillator. If this
approach is used, the TTL must be driven into the X1/CLK pin, and the X2 pin must be left floating.
If the user desires to run numerous DUARTs from a single crystal oscillator,
Figure 26 presents an approach and the
necessary circuitry to accomplish this objective.
X1
X2
XR88C681
Y1
74HC14
To X1 inputs of
other DUARTs
3.684MHz
Figure 26. A Recommended Schematic to Drive Multiple DUARTs From the Same Crystal Oscillator.
Note:
The user is urged not to use the 74LS14 Schmitt Trigger Inverter in lieu of the 74HC14 device. The input of the 74LS14 tends to
load down the oscillating signal from the DUART, to the point that the Schmitt Trigger inverter can no longer change state or
respond to the oscillator signal.
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相关代理商/技术参数
参数描述
XR88C681JTR-F 功能描述:UART 接口集成电路 Dual Channel UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
XR88C681MN-S0968 制造商:Exar Corporation 功能描述:
XR88C681N/40 制造商:EXAR 制造商全称:EXAR 功能描述:CMOS DUAL CHANNEL UART (DUART)
XR88C681P/28 制造商:Exar Corporation 功能描述:
XR88C681P/28-F 功能描述:UART 接口集成电路 Dual Channel UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel