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參數(shù)資料
| 型號： | CT3231M |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | DATACOM, MIL-STD-1553 DATA BUS TRANSCEIVER, MDIP24 |
| 封裝： | 1.270 X 1.270 INCH, 0.175 INCH HEIGHT, HERMETIC SEALED, METAL, PLUG IN-24 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 157K |
| 代理商： | CT3231M |
SCDCT3231 Rev B
FEATURES
±12V to ±15V/+5V DC power supply operation
1.5Watt total hybrid dissipation at 25% transmitting duty cycle
Monolithic construction
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
Designed for commercial, industrial and aerospace applications
MIL-PRF-38534 compliant devices available
Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer
Packaging – hermetic metal plug-in or flat package
24 Lead, 1.27" sq. max x .200"H Flat package
24 Pin, 1.27" sq. max x .175"H Plug-In package
DRIVER DESCRIPTION
The CT3231 Driver section accepts complementary TTL Data at the input, and produces a 30 Volt nominal
peak-to-peak differential signal across a 140
Ω
load at the output. When coupled to the Data Bus with a 1:1
transformer, isolated on the Data Bus side with two 55.0
Ω
fault isolation resistors, and loaded by two 70
Ω
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. It is recommended that those inputs be driven from a “D” type flip-flop.
RECEIVER DESCRIPTION
The CT3231 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 2K
Ω
pull-up to +5V is
recommended.
CT3231M Low Power Driver/Receiver
for MIL-STD-1553B & SAE-AS15531
Standard Products
www.aeroflex.com/Avionics
March 15, 2005
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