Figure 2. AUTO ON-LINE<" />
參數(shù)資料
型號(hào): SP3223EUEY-L
廠商: Exar Corporation
文件頁(yè)數(shù): 6/20頁(yè)
文件大小: 0K
描述: IC TXRX RS232 INTELLIGNT 20TSSOP
標(biāo)準(zhǔn)包裝: 74
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 2/2
規(guī)程: RS232
電源電壓: 3 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-TSSOP
包裝: 管件
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (50)668-707 www.exar.com
SP3223E/EB/EU_0_06272
4
Figure 2. AUTO ON-LINE Timing Waveforms
RECEIVER
RS-232 INPUT
VOLTAGES
STATUS
+5V
0V
-5V
tSTSL
tSTSH
tONLINE
VCC
0V
DRIVER
RS-232 OUTPUT
VOLTAGES
0V
+2.7V
-2.7V
S
H
U
T
D
O
W
N
Table 5. AUTO ON-LINE Logic
Figure 22. Stage I of AUTO ON-LINE Circuitry
Figure 23. Stage II of AUTO ON-LINE Circuitry
RS-232
Receiver Block
RXINACT
Inactive Detection Block
RXIN
RXOUT
R1ON
R 2ON
Delay
Buffer
Delay
Buffer
SHUTDOWN
INACTIVE
RS-232 SIGNAL
AT RECEIVER
INPUT
SHUTDOWN
ONLINE
STATUS
TRANSCEIVER
STATUS
YES
HIGH
LOW
HIGH
Normal Operation
(AUTO ON-LINE)
NO
HIGH
LOW
Normal Operation
NO
HIGH
LOW
Shutdown
(AUTO ON-LINE)
YES
LOW
HIGH/LOW
HIGH
Shutdown
NO
LOW
HIGH/LOW
LOW
Shutdown
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