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| 型号： | SP3221ECY |
| 元件分类： | RS-232 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | 5V的高速RS - 232收发器与0.1uF电容 |
| 文件页数： | 8/18页 |
| 文件大小： | 115K |
| 代理商： | SP3221ECY |
Date: 7/21/04
SP3221E +3.0V to +5.5V RS-232 Transceiver
8
Copyright 2004 Sipex Corporation
Receivers
The receiver converts
±
5.0V EIA/TIA-232
levels to TTL or CMOS logic output levels. The
receiver has an inverting output that can be
disabled by using the EN pin.
The receiver is active when the
Auto-Online
circuitry is enabled or when in shutdown.
During the shutdown, the receiver will continue
to be active.
Driving EN to a logic HIGH forces the output of
the receiver into high-impedance.
Table 2. SHUTDOWN and EN Truth Tables
Note: In Auto-Online Mode where ONLINE = GND and
SHUTDOWN = V
, the device will shut down if there is
no activity present at the Receiver inputs.
Figure 6. Loopback Test Circuit for RS-232 Driver Data
Transmission Rates
Since receiver input is usually from a transmis-
sion line where long cable lengths and system
interference can degrade the signal, the inputs
have a typical hysteresis margin of 300mV. This
ensures that the receiver is virtually immune to
noisy transmission lines. Should an input be left
unconnected, an internal 5K
pulldown resistor
to ground will commit the output of the receiver
to a HIGH state.
Figure 7. Loopback Test Circuit Result at 250Kbps
(Driver Fully Loaded)
Figure 8. Loopback Test Circuit result at 235Kbps
(Driver Fully Loaded)
Ch1
Ch3
3
1
2
T
T
T
T
[
]
T1 IN
T1 OUT
R1 OUT
5.00V
5.00V
Ch2 5.00V M 5.00
μ
s Ch1
0V
3
1
2
T
T
T
T
[
]
T1 IN
T1 OUT
R1 OUT
Ch1
Ch3
5.00V
5.00V
Ch2 5.00V M 2.50
μ
s Ch1
0V
E
1
2
2
3
P
S
:
E
C
I
V
E
D
N
W
O
D
T
U
H
S
N
E
T
X
T
U
O
R
X
T
U
O
0
0
Z
h
g
H
e
v
A
0
1
Z
h
g
H
Z
h
g
H
1
0
e
v
A
e
v
A
1
1
e
v
A
Z
h
g
H
SP3221E
2
4
6
5
3
7
19
GND
T
1
IN
C1+
C1-
C2+
C2-
V+
V-
V
CC
0.1
μ
F
0.1
μ
F
0.1
μ
F
+
C2
C5
C1
+
+
C3
C4
+
+
0.1
μ
F
0.1
μ
F
TTINPUTS
+3V to +5V
18
SHUTDOWN
20
5K
R
1
OUT
OUTPUTS
EN
1
ONLINE
11STATUS
14
R
1
IN
T
1
OUT
V
CC
μ
P Supervisor
To
1000pF
11
9
13
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP3221ECY/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceiver |
| SP3221ECY-L | 功能描述:RS-232接口集成电路 Intelligent 3-5.5V RS-232 Xcvr RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| SP3221ECY-L/TR | 功能描述:RS-232接口集成电路 Intelligent 3-5.5V RS-232 Xcvr RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| SP3221EEA | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceiver |
| SP3221EEA/TR | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Intelligent +3.0V to +5.5V RS-232 Transceiver |
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