FIGURE 5. RS-485/422 RECEIVER T
參數(shù)資料
型號: SP339EER1-L
廠商: Exar Corporation
文件頁數(shù): 6/23頁
文件大?。?/td> 0K
描述: IC TXRX RS232/485 TERM 40QFN
特色產(chǎn)品: SP339 Multiprotocol Transceiver
標(biāo)準(zhǔn)包裝: 490
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 3/5
規(guī)程: RS232,RS422,RS485
電源電壓: 3.3V,5V
安裝類型: 表面貼裝
封裝/外殼: 40-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 40-QFN(6x6)
包裝: 托盤
其它名稱: 1016-1704
FIGURE 5. RS-485/422 RECEIVER TERMINATION RESISTANCE
TERM = VCC
IB
±2V
Rx
IA
B
A
RTERM
RTERM = 2 (VA
VB)
IA
IB
-7V
VA, VB
+12V
Termination is enabled in RS-485/422 modes when the TERM pin is held high (VCC).
FIGURE 6. RS-485/422 DIFFERENTIAL DRIVER OUTPUT VOLTAGE
Tx
VOD
VCM
Tx Enable = VCC
Tx Input = 0V or VCC
B
A
RL
2
RL
2
FIGURE 7. RS-485/422 DIFFERENTIAL DRIVER OUTPUT VOLTAGE OVER COMMON MODE
Tx
VOD
VCM
60
375
B
A
Tx Enable = VCC
Tx Input = 0V or VCC
FIGURE 8. RS-485/422 DRIVER OUTPUT SHORT CIRCUIT CURRENT
Tx
-7V to +12V
V
B
A
IOSD
Tx Enable = 0V or VCC
Tx Input = 0V or VCC
SP339E
14
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
REV. 1.0.3
TEST CIRCUITS
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