參數(shù)資料
型號(hào): SP485CN-L/TR
廠商: Exar Corporation
文件頁數(shù): 9/11頁
文件大?。?/td> 0K
描述: IC TXRX RS485 HALF DUPLEX 8NSOIC
標(biāo)準(zhǔn)包裝: 2,500
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: RS485
電源電壓: 5V
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOICN
包裝: 帶卷 (TR)
其它名稱: SP485CN-L/TR-ND
7
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP483_SP485_0_0627
Figure 6. Driver Enable and Disable Times
Figure 8. Receiver Enable and Disable Times
+3V
0V
DE
5V
VOL
A,B
0V
1.5V
tZL
tZH
VOH
A,B
2.3V
tLZ
tHZ
0.5V
Output normally LOW
Output normally HIGH
fSP485 = 1MHz;
tR ≤10ns; tF ≤10ns
fSP483 = 100kHz;
SWITCHING WAVEFORMS
FUNCTION TRUTH TABLES
INPUTS
OUTPUTS
RE
DE
DI
LINE
CONDITION
A
B
X
No Fault
0
X
0
No Fault
0
X
0
X
Z
X
X
Fault
Z
Table . Transmit Function Truth Table
INPUTS
OUTPUTS
RE
DE
A - B
R
0
+0.2V
0
-0.2V
0
Inputs Open
0
X
Z
Table 2. Receive Function Truth Table
VOH
VOL
R
1.5V
tPHL
OUTPUT
VOD2+
VOD2
A – B
0V
tPLH
INPUT
fSP485 = 1MHz;
tR ≤10ns; tF ≤10ns
fSP483 = 100kHz;
tSKEW= |tPLH - tPHL|
+3V
0V
5V
0V
1.5V
tZL
tZH
R
1.5V
tLZ
tHZ
0.5V
Output normally LOW
Output normally HIGH
VIL
VIH
R
RE
fSP485 = 1MHz;
tR ≤10ns; tF ≤10ns
fSP483 = 100kHz;
Figure 7. Receiver Propagation Delays
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