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参数资料
| 型号： | XR68C681CP |
| 厂商： | Exar Corporation |
| 文件页数： | 2/75页 |
| 文件大小： | 0K |
| 描述： | IC UART CMOS DUAL 40PDIP |
| 产品变化通告： | Leaded UART, V&I Obsolescence 11/Apr/2011 |
| 标准包装： | 9 |
| 特点： | * |
| 通道数： | 2，DUART |
| FIFO's： | 1 字节，3 字节 |
| 电源电压： | 5V |
| 安装类型： | 通孔 |
| 封装/外壳： | 40-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 40-PDIP |
| 包装： | 管件 |
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XR68C681
AC ELECTRICAL CHARACTERISTICS 1, 2, 3 (CONT’D)
Test Conditions: TA =0- 70
C, VCC =5.0V +5% unless otherwise specified.
Symbol
Parameter
Min
Typ
Max
Unit
Conditions
Clock Timing (Figure 38)
5
5 $ 5 2! 9(-
: ( <
%
+5
5 $ 5 2! C'&
/5
/
9G
5
9G
Transmitter Timing (Figure 39)
5
5 & 5 2!
:
16
%
5 & 5 #
:
6
%
Receiver Timing (Figure 40)
5
5 ( 5
2! 9(-
=
%
59
5 9$ ( + 5
2! 9(-
%
Notes
1. Parameters are valid over the specified temperature and operating supply ranges. Typical values are 25
C, VCC = 5V and typical
processing parameters.
2. All voltages are referenced to ground (GND). For testing, input signal levels are 0.4V and 2.4V with a transition time of 20ns
maximum. All time measurements are referenced at input voltages of 0.8V and 2.0V as appropriate. See Figure 31.
3. AC test conditions for outputs: CL = 50pF, RL = 2.7k to VCC.
4. Consecutive write operations to the same register require at least three edges of the X1 clock between writes.
5. This specification imposes a 6 MHz maximum 68000 clock frequency if a read or write cycle follows immediately after the previous
read or write cycle. A higher 68000 clock can be used if this is not the case.
6. This specification imposes a lower bound on CS and IACK low, guaranteeing that they will be low for at least one CLK period.
7. This parameter is specified only to insure DTACK is asserted with respect to the rising edge of X1/CLK as shown in the timing dia-
gram, not to guarantee operation of the part. If the specified setup time is violated, DTACK may be asserted as shown or may be
asserted one clock cycle later.
8. The minimum high time must be at least 1.5 times the X1/CLK period and the minimum low time must be at least equal to the X1/CLK
period if either channel’s Receiver is operating in external 1X clock mode.
Specifications are subject to change without notice
ABSOLUTE MAXIMUM RATINGS1
& ;-
@;
-
/6 6
;-% ( %' 0$
6; ?@;
1. Stresses above those listed under the Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rat-
ing only, and functional operation of the device at these or any other conditions above those indicated in the “Electrical Characteris-
tics” section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
2. This product includes circuitry specifically designed for the protection of its internal devices from damaging effects of excessive stat-
ic charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying any voltage larger than the rated
maximum.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR68C681CP40 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| XR68C681CP-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 |
| XR68C681CP-F | 制造商:Exar Corporation 功能描述:UART IC |
| XR68C681CP-F | 制造商:Exar Corporation 功能描述:IC DUAL UART 1MBPS 5.25V 40-DIP |
| XR68C681J | 制造商:未知厂家 制造商全称:未知厂家 功能描述:UART |
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