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HI-8787

Holt Integrated Circuits
Part Number HI-8787
Manufacturer Holt Integrated Circuits
Description (HI-8787 / HI-8788) 16-BIT PARALLEL DATA CONVERTED 429&561 SERIAL DATA OUT
Published Jun 11, 2007
Detailed Description HI-8787, HI-8788 January 2001 DESCRIPTION The HI-8787 and HI-8788 are system components for interfacing 16 bit parallel...
Datasheet PDF File HI-8787 PDF File

HI-8787
HI-8787

Overview
HI-8787, HI-8788 January 2001 DESCRIPTION The HI-8787 and HI-8788 are system components for interfacing 16 bit parallel data to an ARINC 429 bus.
They combine logic and line driver on one chip.
The HI-8787 has an output resistance of 37.
5 ohms, and the HI-8788 has output resistance of 10 ohms to facilitate external lightning protection circuitry.
The technology is analog/digital CMOS.
Both products offer high speed data bus transactions into a buffer register.
After loading 2 16-bit words, data is automatically transferred and transmitted.
The data rate is equal to the clock rate.
Parity can be enabled in the 32nd bit.
Reset is used to initialize the logic upon startup.
Word gaps are automatically sent.
The part requires +/- 10 volt supplies in addition to a 5 volt supply.
PIN CONFIGURATION D4 - 1 N/C - 2 D5 - 3 D6 - 4 D7 - 5 D8 - 6 D9 - 7 D10 - 8 24 - TXBOUT HI-8787PQI HI-8787PQT HI-8788PQI & HI-8788PQT 23 - TXAOUT 22 - V21 - PARITY ENB 20 - XMT RDY 19 - XMIT CLK 18 - RESET 17 - WRITE www.
DataSheet4U.
com FEATURES 32-Pin Plastic TQFP package l Automatically converts 16 bit parallel data to ARINC 429 or 561 data High speed data bus interface On-chip line driver Available in small TQFP package Military processing options l l l l (DS8787 Rev.
B) HOLT INTEGRATED CIRCUITS 1 01/01 HI-8787, HI-8788 PIN DESCRIPTIONS PIN 28 1, 3-10,13-15, 29-32 11 12 16 17 18 19 20 21 22 23 24 25 26 27 SYMBOL 561 SYNC Dn GND A0 SLP1.
5 WRITE RESET XMIT CLK XMT RDY PARITY ENB VTXAOUT TXBOUT 561 DATA V+ VCC FUNCTION digital output digital inputs power supply digital input digital input digital input digital input digital input digital output digital input power supply analog output analog output digital output power supply power supply DESCRIPTION ARINC 561 Sync signal Parallel 16 bit bus input Ground Load address, A0=0 for 1st data load, A0=1 for 2nd data load Selects the slope of the line driver.
High=1.
5us Write strobe.
Loads data on rising edge.
Registers and sequencing ...


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