FIGURE 1. RS-485 DRIVER VOD A" />
參數(shù)資料
型號(hào): ISL81387IAZ-T
廠商: Intersil
文件頁(yè)數(shù): 3/27頁(yè)
文件大?。?/td> 0K
描述: TXRX ESD RS-485/422 2PORT 20SSOP
產(chǎn)品培訓(xùn)模塊: Solutions for Industrial Control Applications
標(biāo)準(zhǔn)包裝: 1
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 2/2
規(guī)程: RS232,RS422,RS485
電源電壓: 4.5 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 20-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 20-SSOP
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁(yè)面: 1241 (CN2011-ZH PDF)
其它名稱: ISL81387IAZ-TDKR
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
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
ISL81387, ISL41387
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