V
參數(shù)資料
型號(hào): SP332CT-L
廠商: Exar Corporation
文件頁數(shù): 7/11頁
文件大?。?/td> 0K
描述: IC TXRX RS232/485 SRL 28WSOIC
標(biāo)準(zhǔn)包裝: 1,500
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 4/4
規(guī)程: RS232,RS485
電源電壓: 5V
安裝類型: 表面貼裝
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 28-SOIC W
包裝: 管件
5
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP332_00_0260
TEST CIRCUITS
A
B
R
VOD
VOC
Figure 1. RS-485 Driver DC Test Load Circuit
C
L1
15pF
RO
A
B
A
B
DI
C
L2
R
DIFF
Figure 3. RS-485 Driver/Receiver Timing Test Circuit
500
CL
Output
Under
Test
S1
S2
VCC
Figure 4. RS-485 Driver Timing Test Load #2 Circuit
1K
CRL
Receiver
Output
S1
S2
Test Point
VCC
Figure 2. Receiver Timing Test Load Circuit
SWITCHING WAVEFORMS
+3V
0V
DRIVER INPUT
A
B
DRIVER
OUTPUT
VO+
DIFFERENTIAL
OUTPUT
VA –VB
0V
VO
1.5V
tPLH
tF
tR
f ≥1MHz; tR ≤10ns; tF ≤10ns
VO 1/2VO
1/2VO
tPHL
tSKEW= |tDPLH-tDPHL|
tDPLH
tDPHL
Figure 5. RS-485 Driver Propagation Delays
VOH
VOL
RECEIVER OUT
1.5V
tPHL
f = 1MHz; tR 10ns; tF ≤ 10ns
OUTPUT
VOD2+
VOD2
A – B
0V
tPLH
INPUT
Figure 6. RS-485 Receiver Propagation Delays
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