參數(shù)資料
型號： E749-EDGE749
英文描述： Octal Pin Electronics Driver / Receiver
中文描述： 八路引腳電子驅(qū)動器/接收器
文件頁數(shù)： 11/15頁
文件大?。?/td> 152K
代理商： E749-EDGE749
5
Revision 3 / October 21, 2002
www .semtech.com
TEST AND MEASUREMENT PRODUCTS
Edge749
Circuit Description (continued)
Driver Output Protection
In a functional testing environment, where a resistor is
added in series with the driver output (to create a 50
output impedance), the Edge749 can withstand a short
to any legal DUT voltage for an indefinite amount of time.
In a low impedance application with no additional output
series resistance, care must be exercised and systems
should be designed to check for this condition and tristate
the driver if a short is detected.
Receiver Functionality
Edge749 suppor ts programmable thresholds per
channel. There are no shared lines between comparators.
THRESHOLD is a high input impedance analog input
which defines a logical “1” and “0” at the DUT (see
Figure 4).
If the DUT voltage is more positive than
THRESHOLD, DATA OUT will be high. With DUT lower
than THRESHOLD, DATA OUT will be low.
Figure 4. Receiver Functionality
DATA OUT
DUT
THRESHOLD
DATA OUT
Tpd
–
+
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