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參數資料
| 型號： | HS-248RH |
| 廠商： | Intersil Corporation |
| 英文描述： | Radiation Hardened Triple Party Line Transmitter(抗輻射三差分組線接收器) |
| 中文描述： | 輻射加固三黨線傳輸器（抗輻射三差分組線接收器） |
| 文件頁數： | 4/8頁 |
| 文件大小： | 110K |
| 代理商： | HS-248RH |
4
Transmitter
The HS-245RH transmitters have two inputs per transmitter,
either of which is low while the other is open during normal
operation and both inputs are open during standby. For
optimum transmitter performance, the “off” input should be
open circuit rather than being pulled towards +5V, because
this will reduce the “on” output data current. On the other
hand, the “on” and “off” output data current will increase if
the “off” input is held below its open circuit voltage. Open
collector gates such as the 7401 and 7403 or 7405 Hex-
Inverter are suitable for driving the HS-245RH transmitter
inputs. By using 2-input gates as shown in Figure 4, an
enable line can be provided so that more than one
transmitter may be connected to a line for time sharing.
When the enable line is low the transmitter will be disabled
and will present a high impedance to the transmission line
as well as requiring very little power supply current.
Complementary input signals may be derived from high
speed inverter gates as shown, or by using the
complementary outputs of a flip-flop. When the transmitter is
connected near the midpoint of a long transmission line or to
a line with terminations at both ends, two transmitter
sections should be paralleled with respective inputs and
outputs connected together in order to drive the reduced
impedance. This parallel transmitter technique can also be
used to increase the data rate on long transmission lines.
TABLE A. GENERAL TRANSMITTER/RECEIVER CHARACTERISTICS
TRIPLE LINE TRANSMITTER
PARAMETER
HS-245RH
UNITS
COMMENTS
Operating Temperature Range
-55 to 125
o
C
“ON” Output Current
1.0 Min
mA
Over Full Temperature Range
Power Supply Current
7.0 Max
mA
Per Transmitter Section
Standby Current
33 Max
μ
A
Per Transmitter Section
Propagation Delay
14 Max
ns
Over Full Temperature Range
TRIPLE LINE RECEIVER
PARAMETER
RECEIVER TYPE
LIMITS
UNITS
COMMENTS
Operating Temperature Range
HS-246RH/248RH
-55 to 125
o
C
Power Supply
ICC (VCC = +5.0V)
HS-246RH/248RH
2.6
mA
Per Receiver Section
Propagation Delay
All Receivers
30
ns
Over Full Temperature Range
Input Impedance and
Output Circuit
HS-246RH
INPUT
OUTPUT
100
Open Collector
HS-248RH
Hi-Z
6K Pull-Up Resistor
-5V
OUT
+5
GND
1/3
HS-246RH
+5V
GND
2K-6K FOR TTL DRIVE
REQUIRED FOR HS-246RH
OUT
1/3
HS-248RH
-5V
+5V
GND
IN
ENABLE
G1
1/3
HS-245RH
G2
G3
FIGURE 4. TYPICAL DATA TRANSMISSION SYSTEM
HS-245RH, HS-246RH, HS-248RH
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