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RM3283

Features: • Two separate analog receiver channels• Converts ARINC 429 levels to serial data• Built-in TTL compatible complete channel test inputs• TTL and CMOS compatible outputs• Low power dissipation• Internal bandgap• Short circuit protected• Avai...

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RM3283: Features: • Two separate analog receiver channels• Converts ARINC 429 levels to serial data• Built-in TTL compatible complete channel test inputs• TTL and CMOS compatible out...

RM3283 Data Sheet

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Part Number:
RM3283
Supply Ability:
5000

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  • 1~5000
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Product Details

Description



Features:

• Two separate analog receiver channels
• Converts ARINC 429 levels to serial data
• Built-in TTL compatible complete channel test inputs
• TTL and CMOS compatible outputs
• Low power dissipation
• Internal bandgap
• Short circuit protected
• Available in 20-Lead ceramic DIP


Application

`The standard connections for the RM3283 are shown in Figure 10. Dual supplies from ±12 to ±15 VDC are recommended for the ±VS supplies. Decoupling of all supplies should be done near the IC to avoid propagation of noise spikes due to switching transients. The ground connection should be sturdy and isolated from large switching currents to provide as quiet a ground reference as possible.

`The noise filter capacitors are optional and are added to provide extra noise immunity by limiting bandwidth of the input signal before it reaches the window comparator stage.

`Two capacitors are required for each channel and they must all be the same value. The suggested capacitor value for a 100 kHz operation is 39 pF. For lower data rates, larger values of capacitance may be used to yield better node performance.

`To get optimum performance, the following equation can be used to calculate capacitor value for a specific data rate: Where CFILTER is the capacitor value in pF, and FO is the input frequency (10 kHz FO 150 kHz).

The RM3283 can be used with the Fairchild RM3182A line driver to provide a complete analog ARINC 429 interface. A simple application which can be used for systems requiring a repeater-type circuit for long transmissions is given in Figure 11. More RM3182A drivers may be added to test multiple ARINC channels, as shown.


Pinout

Connection Diagram


Specifications

Parameter Min. Max. Units
Supply Voltage(VCCto VEE)



   +36 V
VLOGICVoltage

   +7 V
Logic Input Voltage -0.3 VLOGIC+ 0.3

 V
Temperature Range Storage -65 +150
Operating -55 +125
Junction Temperature -55 +175
Lead Soldering Temperature 60 sec., DIP, LCC   +300
10 sec., SOIC   +260



Description

The RM3283 consists of two analog ARINC 429 receivers which take differentially encoded ARINC level data andconvert it to serial TTL level data. The RM3283 provides two complete analog ARINC receivers and no external components are required.

Input level shifting thin film resistors and bipolar technology allow ARINC input voltage transients up to ±100V without damage to the RM3283.

Each channel is identical, featuring symmetrical propagation delays for better high speed performance. Input common mode rejection is excellent and threshold voltage is stable, independent of supply voltage. Data outputs are TTL and CMOS compatible.

Two TTL compatible test inputs used to test the ARINC channels are available. They can be used to override the ARINC input data and set the channel outputs to a known state.

The Fairchild RM3182A line driver is the companion chip to the RM3283 line receiver. Together they provide the analog functions needed for the ARINC 429 interface. Digital data processing involving serial-to-parallel conversion and clock recovery can be accomplished using one of the ARINC interface IC's available or by an equivalent gate array implementation.




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