HI-8783, HI-8784, HI-8785
ARINC 429 & 561 INTERFACE DEVICE
8 Bit Parallel Data In / ARINC Serial Data Out
DESCRIPTION
FEATURES
PIN CONFIGURATIONS
The HI-8783, HI-8784, and HI-8785 are system compo-
nents for interfacing 8 bit parallel data to an ARINC 429
bus. The HI-8783 is a logic device only and requires a sep-
arate line driver circuit, such as the HI-3182 or HI-8585.
The HI-8784 and HI-8785 combine logic and line driver on
one chip. The HI-8784 has an output resistance of 37.5
ohms, and the HI-8785 has an output resistance of 10
ohms to facilitate external lightning protection cicuitry. The
technology is analog/digital CMOS.
The HI-8783 is available in a 22 pin DIP format as a second
source replacement for the Micrel / California Devices
DLS-111BV.
The products offer high speed data bus data transactions
to a buffer register. After loading 4 bytes, data is automati-
cally 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
transmitted automatically.
The HI-8784 and HI-8785 require +/- 10 volt supplies in ad-
dition to the 5 volt supply.
Automatically converts 8 bit parallel data
toARINC 429 or 561 serial data
High speed data bus interface
On-chip line driver option
SOIC packages available
Industrial and extended temperature
ranges
l
l
l
l
l
(See page 7 for additional pin configurations)
VCC
561 SYNC
D0
D1
D2
D3
D4
D5
D6
D7
561 DATA
DATA ZERO
DATA ONE
PARITY ENB
XMT READY
XMIT CLK
A0
GND
RESET
WRITE
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
HI-8783PSI
&
HI-8783PST
20-Pin Plastic SOIC - WB package
V+
561 DATA
TXBOUT
TXAOUT
V-
PARITY ENB
XMT READY
XMIT CLK
SLP1.5
A0
RESET
WRITE
VCC
561 SYNC
D0
D1
D2
D3
D4
D5
D6
NC
D7
GND
1
2
3
4
5
6
7
8
9
10
11
24
23
22
21
20
19
18
17
16
15
14
HI-8784PSI
HI-8784PST
HI-8785PSI
&
HI-8785PST
12 13
24-Pin Plastic SOIC - WB package
February 2009
(DS8783 Rev. K) 02/09
HOLT INTEGRATED CIRCUITS
www.holtic.com
