HS-248RH Intersil Corporation, HS-248RH Datasheet - Page 6

• Manufacturer Part Number: HS-248RH
• Description: Rad-hard Triple Line Transmitter, Triple Line Receiver, Triple Party-line Receiver
• Manufacturer: Intersil Corporation

the grounded input of the transmitter, and is less than 25V
negative with respect to the transmitter VCC. The current
mode system is totally unaffected by ground differential
noise of +2V at frequencies as high as 1MHz.
Propagation Delay
The worst case propagation delay of a transmitter and
receiver, connected as shown in Figure 4, can be
determined by adding the maximum delay shown on the
data sheet for the transmitter and receiver. These overall
switching characteristics are shown in Table B. For the entire
system, however, the propagation delay of the transmission
line must also be considered. This delay, of course, depends
on the length of the line and the characteristics of the line,
but in general, delays of between 1.5ns and 3.0ns per foot
can be expected.
Schematics
NOTES:
1. HS-246RH does not have 6K output pull-up resistors.
2. HS-248RH does not have 50Ω input termination resistors.
(R1) +INPUT
GND
2
7
50Ω
4.1K
R1
2.0K
2.7K
6
1
φ
6K
IN
1
-INPUT
2.7K
OUT
2
φ
(R1) OUTPUT
(R1)
50Ω
1
1
300Ω
HS-245RH, HS-246RH, HS-248RH
T1
380Ω
3
OUT
φ
3
2
+INPUT
4
φ
IN
FIGURE 7. HS-246RH, HS-248RH
2
5
2.0K
2.7K
FIGURE 6. HS-245RH
12VEE
(R2)
14VCC
5
φ
IN
1
OUT
6
φ
R2
1
14VCC
T2
OUT
8
φ
-INPUT
NOTE: VCC = +5V, VEE = -5V.
Propagation Delay
TPLH
Propagation Delay
TPHL
Duty Cycle Distortion
TPLH - TPHL
2
TABLE B. OVERALL TRANSMITTER/RECEIVER SWITCHING
CHARACTERISTICS
(R2)
9
4
φ
IN
2
6
(R2) OUTPUT
10
+INPUT
CHARACTERISTICS
φ
IN
1
9
11
OUT
φ
1
11VEE
(R3)
T3
13VCC
12
OUT
φ
2
13
MIN
R3
HS-245RH, HS-246RH
φ
IN
-
-
-
2
-55
o
HS-248RH
-INPUT
C TO 125
TYP
(R3)
18
18
2
8
10
o
(R3) OUTPUT
C
MAX
40
40
15
UNITS
ns
ns
ns