HI-8785PST Holt Integrated Circuits, HI-8785PST Datasheet

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HI-8785PST

Manufacturer Part Number
HI-8785PST
Description
Manufacturer
Holt Integrated Circuits
Datasheet

Specifications of HI-8785PST

Lead Free Status / Rohs Status
Supplier Unconfirmed
FEATURES
February 2009
DESCRIPTION
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.
(DS8783 Rev. K)
l
l
l
l
l
Automatically converts 8 bit parallel data
to ARINC 429 or 561 serial data
High speed data bus interface
On-chip line driver option
SOIC packages available
Industrial and extended temperature
ranges
HI-8783, HI-8784, HI-8785
8 Bit Parallel Data In / ARINC Serial Data Out
HOLT INTEGRATED CIRCUITS
ARINC 429 & 561 INTERFACE DEVICE
www.holtic.com
PIN CONFIGURATIONS
561 SYNC
(See page 7 for additional pin configurations)
561 SYNC
GND
24-Pin Plastic SOIC - WB package
VCC
20-Pin Plastic SOIC - WB package
NC
D0
D1
D2
D3
D4
D5
D6
D7
VCC
D0
D1
D2
D3
D4
D5
D6
D7
10
11
12
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
HI-8783PST
HI-8784PST
HI-8785PST
HI-8783PSI
HI-8784PSI
HI-8785PSI
&
&
20
19
18
17
16
15
14
13
12
11
561 DATA
DATA ZERO
DATA ONE
PARITY ENB
XMT READY
XMIT CLK
RESET
WRITE
A0
GND
24
23
22
21
20
19
18
17
16
15
14
13
V+
561 DATA
TXBOUT
TXAOUT
V-
PARITY ENB
XMT READY
XMIT CLK
RESET
WRITE
SLP1.5
A0
02/09

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HI-8785PST Summary of contents

Page 1

... DATA 1 20 DATA ZERO DATA ONE 18 3 HI-8783PSI D1 PARITY ENB 4 17 & D2 XMT READY 5 16 HI-8783PST D3 XMIT CLK RESET WRITE GND 561 DATA 23 2 TXBOUT HI-8784PSI TXAOUT HI-8784PST HI-8785PSI & PARITY ENB HI-8785PST XMT READY XMIT CLK RESET WRITE SLP1 02/09 ...

Page 2

... If the PARITY ENB pin is high, the 32nd bit will be a parity bit, inserted make the 32 bit word have odd parity. If the PARITY ENB pin is low, the 32nd bit will be the D7 bit of the 4th byte ...

Page 3

... One, a -10 volt Zero, and a 0 volt Null. The slope of the ARINC outputs is controlled by the SLP1.5 pin. If SLP1.5 is high, the output rise and fall time is nominally 1.5us. If SLP1.5 is set low, the rise and fall times are 10us. DATA ONE and DATA ZERO outputs are not pro- vided for the HI-8784 and HI-8785 ...

Page 4

... TIMING DIAGRAMS GAP XMIT CLK WRITE XMT RDY DATA ONE (HI-8783 only) DATA ZERO (HI-8783 only) ARINC 429 DATA (HI-8784 & HI-8785 only) (TXAOUT-TXBOUT) 561 DATA 561 SYNC DATA BUS BYTE 1 VALID t SET WRITE t WPW A0 t ASW XMT RDY HI-8783, HI-8784, HI-8785 ...

Page 5

... Temperature Range Industrial ...................... -40°C to +85°C Extended ................... -55°C to +125°C NOTE: Stresses above absolute maximum ratings or outside recommended operating conditions may cause permanent damage to the device. These are stress ratings only. Operation at the limits is not recommended. HI-8783, HI-8784 and HI-8785) SYMBOL CONDITION ...

Page 6

... WRITE Delay between WRITE Setup A0 to WRITE Delay last WRITE to XMT RDY AC ELECTRICAL CHARACTERISTICS (HI-8784 and HI-8785 only 10V -10V Operating Temperature Range (unless otherwise stated) A PARAMETERS Line Driver propagation delay Output high to low Output low to high Line Driver transition times ...

Page 7

... ADDITIONAL HI-8783 PIN CONFIGURATION ORDERING INFORMATION HI - 87XX PART NUMBER PART NUMBER PART NUMBER PART NUMBER HI-8783, HI-8784, HI-8785 561 SYNC VCC 561 DATA DATA ZERO 3 20 HI-8783PDI D2 DATA ONE 19 4 & D3 PARITY ENB 5 18 HI-8783PDT D4 XMT READY XMIT CLK RESET 8 15 ...

Page 8

... REVISION HISTORY Revision Date Description of Change DS8783, Rev. K 02/04/09 Clarified the extended temperature ranges and the power supply nomenclatures in the power sequencing description. HI-8783, HI-8784, HI-8785 HOLT INTEGRATED CIRCUITS 8 ...

Page 9

... HI-8783, HI-8784, HI-8785 PACKAGE DIMENSIONS 20-PIN PLASTIC SMALL OUTLINE (SOIC (Wide Body) .4065 ± .0125 (10.325 ± .318) .050 BSC (1.27) BSC = “Basic Spacing between Centers” is theoretical true position dimension and has no tolerance. (JEDEC Standard 95) 22-PIN PLASTIC DIP .350 ± .010 (8.89 ± ...

Page 10

... HI-8783, HI-8784, HI-8785 PACKAGE DIMENSIONS 24-PIN PLASTIC SMALL OUTLINE (SOIC 24-PIN PLASTIC SMALL OUTLINE (SOIC (Wide Body) (Wide Body) .407 ± .013 (10.325 ± .32) .050 BSC (1.27) BSC = “Basic Spacing between Centers” is theoretical true position dimension and has no tolerance. (JEDEC Standard 95) .606 ± ...

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