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參數(shù)資料
| 型號： | SP211HEA |
| 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)： | 4/14頁 |
| 文件大?。?/td> | 216K |
| 代理商： | SP211HEA |
TGoddard/SP207H/9614R0
SP207H/SP211H High–Speed Transceivers
4
Copyright 2000 Sipex Corporation
PINOUT
FEATURES…
The
SP207H
and
SP211H
line transceivers
provide a variety of configurations to fit most
communication needs, especially those applica-
tions where
±
12V is not available. Both prod-
ucts feature low–power CMOS construction
and
Sipex
–proprietary on-board charge pump
circuitry to generate the
±
10V RS-232 voltage
levels. The ability to use 0.1
μ
F charge pump
capacitors saves board space and reduces circuit
cost.
The
SP207HB
and
SP211H
models feature a
low–power shutdown mode, which reduces
power supply drain to 1
μ
A. The
SP207HB
and
SP211HB
are equipped with the WakeUp func-
tion. The WakeUp function keeps the receivers
active in the shutdown mode, unless disabled by
the EN pin.
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
T
3
OUT
T
1
OUT
T
2
OUT
R
2
IN
R
2
OUT
T
2
IN
T
1
IN
R
1
OUT
R
1
IN
GND
V
CC
C
1
+
V+
C
1
–
T
4
OUT
R
3
IN
R
3
OUT
SHUTDOWN (SD)
EN
R
4
IN
R
4
OUT
T
4
IN
T
3
IN
R
5
OUT
R
5
IN
V–
C
2
–
C
2
+
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
T
3
OUT
T
1
OUT
T
2
OUT
R
2
IN
R
2
OUT
T
2
IN
T
1
IN
R
1
OUT
R
1
IN
GND
V
CC
C
1
+
V+
C
1
–
T
4
OUT
R
3
IN
R
3
OUT
SHUTDOWN (SD)
EN
R
4
IN
R
4
OUT
T
4
IN
T
3
IN
R
5
OUT
R
5
IN
V–
C
2
–
C
2
+
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
T
3
OUT
T
1
OUT
T
2
OUT
R
2
IN
R
2
OUT
T
2
IN
T
1
IN
R
1
OUT
R
1
IN
GND
V
CC
C
1
+
V+
C
1
–
T
4
OUT
NC
T
5
IN
SHUTDOWN (SD)
EN
T
5
OUT
NC
T
4
IN
T
3
IN
R
3
OUT
R
3
IN
V–
C
2
–
C
2
+
S
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
T
3
OUT
T
1
OUT
T
2
OUT
R
1
IN
R
1
OUT
T
2
IN
T
1
IN
GND
V
CC
C
1
+
V+
C
1
–
T
4
OUT
R
2
IN
R
2
OUT
T
5
IN
T
5
OUT
T
4
IN
T
3
IN
R
3
OUT
R
3
IN
V–
C
2
–
C
2
+
THEORY OF OPERATION
The
SP207H
and
SP211H
are made up of three
basic circuit blocks — 1) transmitter/driver, 2)
receiver and 3) the
Sipex
–proprietary charge
pump.
Charge–Pump
The charge pump is a
Sipex
–patented design
(5,306,954) and uses a unique approach com-
pared to older less–efficient designs. The charge
pump still requires four external capacitors, but
uses a four–phase voltage shifting technique to
attain symmetrical 10V power supplies.
Figure
3a
shows the waveform found on the positive
side of capcitor C
2
, and
Figure 3b
shows the
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