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PDF CT3232M Data sheet ( Hoja de datos )
| Número de pieza | CT3232M | |
| Descripción | Low Power Driver /Receiver For MIL-STD-1553 & Macair | |
| Fabricantes | Aeroflex Circuit Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CT3232M (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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CT 3232M
Low Power Driver / Receiver
For MIL-STD-1553 & Macair
Features
■ 1.5 Watt Total Hybrid Dissipation at 25% Transmitting Duty Cycle
■ Monolithic Design
■ Compatible with MIL-STD-1553A/B & Macair A3818, A5232, A5690 & A4905
■ Meets MIL-STD-1553B
■ TTL Compatible
■ Full Military (-55°C to +125°C) Temperature Range
■ Driver / Receiver in a single Package for Space & Weight Savings
■ Filtering on Receiver to Improve S/N Ratio of System
■ Pin for Pin interchangeable with CT3231 Series
■ Packaging – Hermetic Metal Plug-In or Flat Package
• 24 Lead, 1.27" sq. max x .2" Ht Flat package
• 24 Pin, 1.27" sq. max x .175" Ht Plug-In package
CIRCUIT TECHNOLOGY
www.aeroflex.com
DRIVER DESCRIPTION
The CT3232 Driver section accepts complementary TTL Data at the input, and produces a 30
Volt nominal peak-to-peak differential signal across a 140Ω load at the output. When coupled to the
Data Bus with a 1:1 transformer, isolated on the Data Bus side with two 55.0Ω fault isolation
resistors, and loaded by two 70Ω terminations plus additional receivers, the Data Bus signal
produced is 7.2 Volts nominal peak-to-peak.
When both “DATA” and “DATA” inputs are held low or both are held high, the driver output
becomes a high impedance and is “removed” from the line. In addition, an overriding “INHIBIT”
input provides for removal of the Driver output from the line. A logic “1” applied to the “INHIBIT”
takes priority over the condition of the data inputs and disables the Driver. See Driver Logic
Waveforms, Figure 3.
DATA and DATA inputs must be complementary waveforms, of 50% duty cycle average, with no
gate delays between them.
RECEIVER DESCRIPTION
The CT3232 Receiver section accepts Bi-Phase Differential data at the input and produces two
TTL signals at the output. The outputs are “DATA” and “DATA”, and represent positive and negative
excursions (respectively) of the input beyond a predetermined threshold. See Receiver Logic
Waveforms, Figure 2.
The positive and negative thresholds may be internally set by grounding the appropriate pins, or
externally set with resistors. The pre-set internal thresholds will detect Data Bus signals exceeding
1Volt p-p and ignore signals less than 0.5Volt p-p when used with 1:1 transformer (See Figure 4 for
a suitable transformer and typical connection).
A low level at the STROBE input inhibits the DATA and DATA outputs. If unused, a 2KΩ pull-up to
+5V is recommended.
eroflex Circuit Technology – Data Bus Modules For The Future © SCDCT3232 REV A 6/27/02
1 page  
Electrical Characteristics con’t
Parameter / Condition
Sym Min Typ Max Unit
Power and Thermal Data, Total Hybrid (Driver and Receiver)
Total Supply Current, “Standby” mode or transmitting at less than
1% duty cycle (e.g. 20µS of transmission every 2mS or longer
interval)
ICCS
IEES
ICCL
- 40
- 30
- 35
Total Supply Current transmitting at 1MHz into a 35Ω Duty Cycle
load at point A in Figure 4
25%
ICC25
IEE25
Note 4
Note 4
70
65
(ICCL limits do not change with mode of operation
or duty cycle)
100%
ICC100
IEE100
Note 4 175
Note 3 165
Power Dissipation of most critical (hottest) device in
hybrid during continuous transmission
(100% duty cycle)
Supply
Voltage
±12V
±15V
PC12
PC15
Note 3 300
Note 3 450
Thermal Resistance, junction-to-case, of most critical device
ØJC - 80
Allowable transmitting duty cycle when case is held to +100°C
maximum
Note 5
-
-
Allowable transmitting duty cycle when case is held
to +125°C maximum
Supply
Voltage
±12V
±15V
Note 5
Note 5
-
-
-
-
50
40
45
80
75
190
180
400
600
100
100
80
55
mA
mA
mA
mA
mA
mA
mA
mA
mA
°C / W
%
%
%
Note 3: Decreases linearly to zero at zero duty cycle.
Note 4: Decreases linearly to applicable “Standby” value at zero duty cycle.
Note 5: Based upon operating junction temperature of 160°C for hottest device. For lower operating junction temperatures,
reduce maximum duty cycle accordingly.
LINE-TO-LINE
INPUT
INPUT tr
DATA
OUT
DATA
OUT
NOTE: BOTH OUTPUTS HIGH
WITH NO INPUT OR STROBE
AT LOGIC "0"
90%
10%
VIN(p-p)
OVERLAP ≈ VTH1(p-p) x INPUT tr
0.8 x VIN (p-p)
Figure 2 – Receiver Logic Waveforms
Aeroflex Circuit Technology
5 SCDCT3232 REV A 6/27/02 Plainview NY (516) 694-6700
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet CT3232M.PDF ] | |
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