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參數(shù)資料
| 型號(hào)： | SP3203ECY |
| 元件分類： | 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收發(fā)器與0.1uF電容 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 509K |
| 代理商： | SP3203ECY |
9
Rev.
2/7
/01
SP3203E
Copyright 2001 Sipex Corporation
consists of a regulated dual charge pump that
provides output voltages of 5.5V regardless of
the input voltage (V
) over the +3.0V to +5.5V
range. This is important to maintain compliant
RS-232 levels regardless of power supply
fluctuations.
The charge pump operates in a discontinuous
mode using an internal oscillator. If the output
voltages are less than a of 5.5V, the charge
pump is enabled. If the output voltages exceed
a of 5.5V, the charge pump is disabled. This
oscillator controls the four phases of the voltage
shifting (Figure 12). A description of each phase
follows.
V
Charge Storage-Phase 1(Figure 13)
During this phase of the clock cycle, the positive
side of capacitors C
and C
are initially charged
to V
. C
l
charge in C
connected to V
, the voltage potential across
capacitor C
2
is now 2 times V
CC
.
+
is then switched to GND and the
–
is transferred to C
–
. Since C
+
is
Table 1. SHUTDOWN Truth Table.
(Note: When device in shutdown, the SP3203E's charge pump is turned
off and V+ decays to Vcc. V- is pulled to ground and the transmitter outputs
are disabled as High Impedance.)
Figure 9. Loopback Test Circuit for RS-232 Driver Data
Transmission Rates
V
Transfer-Phase 2 (Figure 14)
Phase two of the clock connects the negative
terminal of C
to the V
storage capacitor and
the positive terminal of C
to GND. This
transfers a negative generated voltage to C
3
.
This generated voltage is
regulated to a minimum voltage of -5.5V.
Simultaneous with the transfer of the voltage
to C
, the positive side of capacitor C
is
switched to V
and the negative side is
connected to GND
.
V
Charge Storage-Phase 3 (Figure 15)
The third phase of the clock is identical to the
first phase — the charge transferred in C
1
pro-
Figure 10. Loopback Test Circuit Result at 120Kbps
(All Drivers Fully Loaded)
Figure 11. Loopback Test Circuit result at 250Kbps
(All Drivers Fully Loaded)
SP3203E
1
3
5
4
2
6
19
GND
T
1
IN
T
X
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 +5
.5V
18
SHUTDOWN
20
5K
R
1
OUT
5K
R
X
IN
R
X
OUT
OUTPUTS
R
1
IN
T
X
OUT
T
1
OUT
V
CC
1000pF
1000pF
12
V L
+3V to +5.5V
E
3
0
2
3
P
S
:
E
C
I
E
D
SHUTDOWN
TxOUT
RxOUT
Charge Pump
0
Z
g
Z
g
e
v
a
n
1
e
v
A
e
v
A
e
v
A
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
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| SP3203EEY | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
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| SP320ACF | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| SP3203ECY/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3V RS-232 Serial Transceiver with Logic Selector and15kV ESD Protection |
| SP3203ECY-L | 功能描述:RS-232接口集成電路 RS232 W/ 1.8V LOGIC 3-DRVR/2-RCVR RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| SP3203ECY-L/TR | 功能描述:RS-232接口集成電路 RS232 W/ 1.8V LOGIC 3-DRVR/2-RCVR RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| SP3203EEY | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3V RS-232 Serial Transceiver with Logic Selector and15kV ESD Protection |
| SP3203EEY/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3V RS-232 Serial Transceiver with Logic Selector and15kV ESD Protection |
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