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參數(shù)資料
| 型號(hào)： | DS1228 |
| 英文描述： | Low-Noise, High-Speed, 16-Bit Accurate CMOS Operational Amplifier 8-SOIC -40 to 125 |
| 中文描述： | +5V、雙路RS-232發(fā)送器/接收器 |
| 文件頁(yè)數(shù)： | 1/1頁(yè) |
| 文件大小： | 15K |
| 代理商： | DS1228 |
AlCopyright 1995 by Dallas Semiconductor Corporation.
DS1228
+5V Powered Dual RS-232
Transmitter/Receiver
DS1228
021792 1/1
FEATURES
Operates from a single 5V power supply
Two drivers and two receivers
Meets all EIA RS-232-C specifications
On-board voltage doubler
On-board voltage inverter
+ 30V input levels
+ 9V output levels with + 5V supply
Low-power CMOS
Pin-compatible with the MAX 232
Optional 16-pin SOIC surface mount package
PIN ASSIGNMENT
16–Pin DIP (300 MIL)
16–Pin SOIC (300 MIL)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
VCC
GND
T1OUT
R1IN
R1OUT
T1IN
T2IN
R2OUT
VCC
GND
T1OUT
R1IN
R1OUT
T1IN
T2IN
R2OUT
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
PIN DESCRIPTION
C1+, C1
C2+, C2
V+, V-
T1IN, T2IN
T1OUT, T2OUT
R1IN, R2IN
R1OUT, R2OUT
V
CC
GND
– Capacitor 1 Connections
– Capacitor 2 Connections
– + 10 Volts
– Transmitter In
– Transmitter Out
– Receiver In
– Receiver Out
– +5 Volts
– Ground
DESCRIPTION
The DS1228 is a dual RS-232-C Receiver/Transmitter
that meets all EIA specifications while operating from a
single, +5 volt supply. The DS1228 has two internal
charge pumps. One of the charge pumps is used to gen-
erate +10 volts. The other is used to generate -10 volts.
The DS1228 also contains four level translators. Two of
the level translators are RS-232 transmitters which con-
vert TTL/CMOS inputs into +9V RS-232 outputs. The
other two level translators are capable of operating with
up to +30V inputs. The DS1228 is suitable for all RS-232
communications and is particularly valuable where
higher voltage power supplies for RS-232 drivers are
not available. The power supply section of the DS1228
supplies +10 volts from the V
CC
input.
See the DS1229 data sheet for electrical specifications
and operation.
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