FIGURE 1. RS-485 DRIVER VOD AND V<" />
參數(shù)資料
型號: ISL3331EVAL1Z
廠商: Intersil
文件頁數(shù): 3/25頁
文件大?。?/td> 0K
描述: EVAL BOARD 1 FOR ISL3331
產(chǎn)品培訓(xùn)模塊: Solutions for Industrial Control Applications
標(biāo)準(zhǔn)包裝: 1
系列: *
11
FN6361.0
May 20, 2008
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
Ω
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
ISL3330, ISL3331
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