FIGURE 1. RS-485 DRIVER VOD A" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� ISL41387IRZ
寤犲晢锛� Intersil
鏂囦欢闋佹暩(sh霉)锛� 3/27闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC TXRX DUAL PROTOCAL ESD 40-QFN
鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″锛� Solutions for Industrial Control Applications
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 50
椤炲瀷锛� 鏀剁櫦(f膩)鍣�
椹�(q奴)鍕�(d貌ng)鍣�/鎺ユ敹鍣ㄦ暩(sh霉)锛� 2/2
瑕�(gu墨)绋嬶細 RS232锛孯S422锛孯S485
闆绘簮闆诲锛� 4.5 V ~ 5.5 V
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 40-VFQFN 瑁搁湶鐒婄洡
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 40-QFN 瑁搁湶鐒婄洡锛�6x6锛�
鍖呰锛� 绠′欢
11
FN6201.3
November 21, 2007
Test Circuits and Waveforms
FIGURE 1. RS-485 DRIVER VOD AND VOC TEST CIRCUIT
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. RS-485 DRIVER ENABLE AND DISABLE TIMES
D
DEN
DY
VCC
VOD
VOC
R
Y
Z
RD
VCM
+
-
D
DEN
DY
VCC
SIGNAL
GENERATOR
CL = 100pF
RDIFF
Y
Z
CL = 100pF
OUT (Z)
3V
0V
tPLH
1.5V
VOH
VOL
50%
tPHL
OUT (Y)
tPHL
VOH
VOL
50%
tPLH
DIFF OUT (Z - Y)
tR
+VOD
-VOD
90%
tF
10%
DY
SKEW = |tPLH (Y OR Z) - tPHL (Z OR Y)|
0V
tDHL
tDLH
D
DEN
DY
CL
500
惟
Y
Z
VCC
GND
SW
SIGNAL
GENERATOR
FOR SHDN TESTS, SWITCH ON AND DEN L- H SIMULTANEOUSLY
PARAMETER OUTPUT
RXEN
DY
SW
CL (pF)
tHZ
Y/Z
X
0/1
GND
15
tLZ
Y/Z
X
1/0
VCC
15
tZH
Y/Z
X
0/1
GND
100
tZL
Y/Z
X
1/0
VCC
100
tZH(SHDN)
Y/Z
0
0/1
GND
100
tZL(SHDN)
Y/Z
0
1/0
VCC
100
OUT (Y, Z)
3V
0V
1.5V
VOH
0V
2.3V
VOH - 0.5V
tHZ
OUT (Y, Z)
VCC
VOL
2.3V
VOL + 0.5V
tLZ
DEN
OUTPUT HIGH
OUTPUT LOW
tZL
tZH
tZH(SHDN)
tZL(SHDN)
ENABLED
ISL81387, ISL41387
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
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ISL4221 鍒堕€犲晢:INTERSIL 鍒堕€犲晢鍏ㄧū:Intersil Corporation 鍔熻兘鎻忚堪:QFN Packaged, +/-15kV ESD Protected, +2.7V to +5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/Receivers
ISL4221E 鍒堕€犲晢:INTERSIL 鍒堕€犲晢鍏ㄧū:Intersil Corporation 鍔熻兘鎻忚堪:QFN Packaged, 銆�15kV ESD Protected, +2.7V to +5.5V, 150nA, 250kbps, RS-232 Transmitters/Receivers
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