HI-3599PSIF datasheet(6/18 Pages) HOLTIC

Part #	HI-3599PSIF

Description	Octal ARINC 429 Receiverswith Label Recognition and SPI Interface

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Manufacturer	HOLTIC [Holt Integrated Circuits]

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HI-3596, HI-3597, HI-3598, HI-3599

HOLT INTEGRATED CIRCUITS

6

ARINC 429 Data Format

Control Register bit CR9 controls how individual bits in

the received ARINC word are mapped to the HI-359x

SPI data word during data read operations. Table 5

describes this mapping.

Table 5. SPI / ARINC bit-mapping

SPI / ARINC bit-mapping

SPI Order

1

2 - 22

23 24 25 26 27 28 29 30 31 32

ARINC bit 32 31 - 11 10

9

1

2

3

4

5

6

7

8

CR9 = 0

Data

ARINC bit 32 31 - 11 10

9

8

7

6

5

4

3

2

1

CR9 = 1

Data

ARINC 429 Receiver

ARINC Bus Interface

Figure 3 shows the input circuit for each on-chip ARINC

429linereceiver.TheARINC429specificationrequires

detection levels summarized in Table 6.

Table 6. ARINC 429 Detection Levels

STATE

DIFFERENTIAL VOLTAGE

ONE

+6.5 Volts to +13 Volts

NULL

+2.5 Volts to -2.5 Volts

ZERO

-6.5 Volts to -13 Volts

DIFFERENTIAL

AMPLIFIERS

COMPARATORS

RINA-40

RINA

RINB

RINB-40

VDD

GND

VDD

GND

ONE

NULL

ZERO

Figure 3. ARINC Receiver Input

The HI-359x family guarantees recognition of these lev-

els with a common mode Voltage with respect to GND

less than ±30V for the worst case condition (3.15V sup-

ply and 13V signal level).

The tolerances in the design guarantee detection of

the above levels, so the actual acceptance ranges are

slightly larger. If the ARINC signal is out of the actual

acceptance ranges, including the nulls, the chip rejects

the data.

Receiver Logic Operation

Figure4isablockdiagramshowingthelogicforeach

receiver.

Bit Timing

TheARINC429specificationdefinestimingtolerances

for received data according to Table 7.

Table 7. ARINC 429 Receiver Timing Tolerances

HIGH SPEED

LOW SPEED

Bit Rate

100Kbps ± 1%

12K - 14.5Kbps

Pulse Rise Time

1.5±0.5μs

10±5μs

Pulse Fall Time

1.5±0.5μs

10±5μs

Pulse Width

5μs±5%

34.5to41.7μs

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HI-3599PSIF Datasheet(PDF) 6 Page - Holt Integrated Circuits

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