FIGURE 7. RS-485 DRIVER P
參數(shù)資料
型號: SP336EEY-L/TR
廠商: Exar Corporation
文件頁數(shù): 9/30頁
文件大?。?/td> 0K
描述: IC TXRX RS232/485 PROG 28TSSOP
產(chǎn)品變化通告: Packaging Change 15/Jul/2010
標準包裝: 1,500
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 4/4
規(guī)程: RS232,RS422,RS485
電源電壓: 3.3 V,5 V
安裝類型: 表面貼裝
封裝/外殼: 28-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 28-TSSOP
包裝: 帶卷 (TR)
配用: 1016-1140-ND - EVAL BOARD FOR SP336EEY
FIGURE 7. RS-485 DRIVER PROPAGATION DELAY TEST CIRCUIT
A
B
Tx
DI
R
L
54Ω
C
L
50pF
3.3V
VOD
FIGURE 8. RS-485 DRIVER TIMING DIAGRAM
Vcc
0V
DI
A
B
VO+
V
DIFF
VA –VB
0V
VO
Vcc/2
tPLH
tF
tR
VO
1/2VO
tPHL
t SKEW = |t DPLH- tDPHL|
tDPLH
tDPHL
10%
90%
10%
90%
FIGURE 9. RS-485 DRIVER ENABLE AND DISABLE TEST CIRCUIT
GENERATOR
50Ω
S1
R
L = 500Ω
OUT
C
L = 50pF
Tx
Vcc
B
A
DI
SP336E
17
REV. 1.0.1
3.3V / 5V PROGRAMMABLE RS-232/RS-485/RS-422 SERIAL TRANSCEIVER
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