參數資料
型號: XR82C68444
廠商: Exar Corporation
英文描述: CMOS QUAD CHANNEL UART (QUART)
中文描述: 的CMOS四通道UART(夸脫)
文件頁數: 14/107頁
文件大?。?/td> 2244K
代理商: XR82C68444
XR82C684
@
AC ELECTRICAL CHARACTERISTICS
1, 2, 3
(CONT’D)
Symbol
Parameter
Min.
Typ.
Max.
Unit
Conditions
Receiver Timing XR82C684 (
Figure 66
)
8
8! ! ( 8
5" ;(,
@
%
8;
8! ! ; ( * 8
5" ;(,
%
Notes
1
Parameters are valid over the specified temperature and operating supply ranges. Typical values are 25 C, V
CC
= 5V and typical
processing parameters.
2
Allvoltagesarereferencedtoground(GND). Fortesting,inputsignallevelsare0.4Vand2.4Vwithatransitiontimeof20nsmaxi-
mum. All time measurements are referenced at input voltages of 0.8V and 2.0V as appropriate. See Figure 50.
3
AC test conditions for outputs: CL = 50 pF, RL = 2.7 kohm to V
CC
.
4
If -CS is used as the strobing input, this parameter defines the minimum high time between -CSs.
5
Consecutive write operations to the same register require at least three edges of the X1 clock between writes.
6
Thisspecificationimposesa6MHzmaximum68000clockfrequencyifareadorwritecyclefollowsimmediatelyaftertheprevious
read or write cycle. A higher 68000 clock can be used if this is not the case.
7
This specification imposes a lower bound on -CS and -IACK low, guaranteeing that they will be low for at least one CLK period.
8
Thisparameterisspecifiedonlytoinsurethat-DTACKisassertedwithrespecttotherisingedgeofX1/CLKas shownin thetiming
diagram,nottoguaranteeoperationofthepart. Ifthespecifiedsetuptimeisviolated,-DTACKmaybeassertedasshownormaybe
asserted one clock cycle later.
9
Theminimumhightimemustbeatleast1.5timestheX1/CLKperiodandtheminimumlowtimemustbeatleastequaltotheX1/CLK
period if either channel’s Receiver is operating in external 1X clock mode.
ABSOLUTE MAXIMUM RATINGS
1
! & > ,
B>
,
.9
9
> ,% 3( %' 2
9> NB>
Notes
1
StressesabovethoselistedundertheAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice. Thisisastressrat-
ingonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsabovethoseindicatedinthe“ElectricalCharacteris-
tics” section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
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相關代理商/技術參數
參數描述
XR82C684CJ 制造商:EXAR 制造商全稱:EXAR 功能描述:CMOS QUAD CHANNEL UART (QUART)
XR82C684CJ/44 制造商:EXAR 制造商全稱:EXAR 功能描述:CMOS QUAD CHANNEL UART (QUART)
XR82C684CJ/44-0A-EB 功能描述:界面開發(fā)工具 Supports 82C684 44ld PLCC, ISA Interface RoHS:否 制造商:Bourns 產品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
XR82C684CJ/44-F 功能描述:UART 接口集成電路 0.5V-2V UART temp 0C to 70C RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR82C684CJ-0A-EVB 功能描述:界面開發(fā)工具 Supports 82C684 68ld PLCC, ISA Interface RoHS:否 制造商:Bourns 產品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V