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SP3243CT bảng dữ liệu(PDF) 11 Page - Sipex Corporation

tên linh kiện SP3243CT
Giải thích chi tiết về linh kiện  Intelligent 3.0V to 5.5V RS-232 Transceivers
PDF  23 Pages
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nhà sản xuất  SIPEX [Sipex Corporation]
Trang chủ  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP3243CT bảng dữ liệu(HTML) 11 Page - Sipex Corporation

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11
Rev. 6/30/03
SP3223 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
Figure 12 shows a loopback test circuit used to
test the RS-232 Drivers. Figure 13 shows the test
results of the loopback circuit with all three
drivers active (SP3243) at 120Kbps with typical
RS-232 loads in parallel with 1000pF capacitors.
Figure 14 shows the test results where one driver
was active at 235Kbps and all three drivers
loaded with an RS-232 receiver in parallel with
a 1000pF capacitor. A solid RS-232 data trans-
Table 2. SHUTDOWN and EN Truth Tables
Note: In AUTO ON-LINE® Mode where ONLINE =
GND and SHUTDOWN = V
CC, the device will shut down
if there is no activity present at the Receiver inputs.
Figure 12. Loopback Test Circuit for RS-232 Driver
Data Transmission Rates
mission rate of 120Kbps provides compatibility
with many designs in personal computer periph-
erals and LAN applications.
Receivers
The receivers convert
±5.0V EIA/TIA-232
levels to TTL or CMOS logic output levels.
Receivers have an inverting output that can be
disabled by using the EN pin.
Figure 13. Loopback Test Circuit Result at 120Kbps
(All Drivers Fully Loaded)
Figure 14. Loopback Test Circuit result at 235Kbps
(All Drivers Fully Loaded)
SP3223
SP3243
2
4
6
5
3
7
19
GND
T
1IN
T
XIN
C1+
C1-
C2+
C2-
V+
V-
VCC
0.1µF
0.1µF
0.1µF
+
C2
C5
C1
+
+
C3
C4
+
+
0.1µF
0.1µF
TTL/CMOS
INPUTS
+3V to +5V
18
SHUTDOWN
20
5KΩ
R
1OUT
5KΩ
R
XIN
R
XOUT
TTL/CMOS
OUTPUTS
EN
1
ONLINE
14
R
1IN
T
XOUT
T
1OUT
11
STATUS
VCC
To µP Supervisor
Circuit
1000pF
1000pF
3
2
2
3
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S
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T1 IN
T1 OUT
R1 OUT
T1 IN
T1 OUT
R1 OUT



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