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HI-2581 데이터시트 PDF




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기능 3.3V MIL-STD-1553/1760 Dual Transceiver
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HI-2581 데이터시트, 핀배열, 회로
July, 2016
HI-2579, HI-2581
3.3V MIL-STD-1553/1760 Dual Transceiver
with Low Profile Integrated Transformers
GENERAL DESCRIPTION
The HI-2579 / HI-2581 are low power CMOS dual
transceivers with integrated transformers designed
to meet the requirements of the MIL-STD-1553 /
MIL-STD-1760 specifications. The dual transceivers
with integrated transformers provide a low profile single
part solution for interfacing a protocol IC or FPGA to a
dual redundant MIL-STD-1553 bus.
The transmitter section of each bus takes complementary
CMOS / TTL Manchester II bi-phase data and converts it
to differential voltages suitable for driving the integrated
isolation transformer. Separate transmitter inhibit control
signals are provided for each transmitter.
The receiver section of the each bus converts the 1553
bus differential data to complementary CMOS / TTL data
suitable for inputting to a Manchester decoder. Each
receiver has a separate enable input which can be used
to force both receiver outputs to logic “0” (HI-2579) or
logic 1 (HI-2581).
The family of parts are available in Industrial -40oC to
+85oC, or Extended, -55oC to +125oC temperature
ranges.
FEATURES
• Dual-redundant MIL-STD-1553 transceivers with
integrated transformers
• Small footprint and low profile package
• Compliant to MIL-STD-1553A and B,
MIL-STD-1760, ARINC 708A
• 3.3V single supply operation
• Less than 1.0W maximum power dissipation
• Industrial and extended temperature ranges
PIN CONFIGURATION (TOP)
BUSA - 1
BUSA - 2
TXA - 3
TXA - 4
VDDA - 5
RXENA - 6
GNDA - 7
VDDB - 8
RXENB - 9
GNDB - 10
DNC - 11
DNC - 12
HI-2579CGIF
HI-2579CGTF
HI-2581CGIF
HI-2581CGTF
24 - DNC
23 - DNC
22 - TXINHA
21 - RXA
20 - RXA
19 - TXB
18 - TXB
17 - TXINHB
16 - RXB
15 - RXB
14 - BUSB
13 - BUSB
DNC = Do Not Connect
DS2579 Rev. E
HOLT INTEGRATED CIRCUITS
www.holtic.com
1
07/16




HI-2581 pdf, 반도체, 판매, 대치품
HI-2579, HI-2581
FUNCTIONAL DESCRIPTION
The HI-2579 family of data bus transceivers contains
differential voltage source drivers, differential receivers
and integrated transformers. They are intended for
applications using a MIL-STD-1553 A/B data bus.
Transmitter
Data is input to the device’s transmitter section from
the complementary CMOS inputs TXA/B and TXA/B.
The transmitter accepts Manchester II bi-phase data
and converts it to differential voltages which drive the
internal transformers on BUSA/B and BUSA/B. The
transformer outputs are either direct or transformer
coupled to the MIL-STD-1553 data bus. Both coupling
methods produce a nominal voltage on the main bus of
7.5 volts peak to peak.
The transmitter is automatically inhibited and placed in
the high impedance state when both TXA/B and TXA/B
are either at a logic “1” or logic “0” simultaneously. A logic
“1” applied to the TXINHA/B input forces the transmitter
to the high impedance state, regardless of the state of
TXA/B and TXA/B.
Receiver
The receiver accepts bi-phase differential data from
the MIL-STD-1553 bus through the same direct or
transformer coupled interface as the transmitter. The
receiver’s differential input stage includes a filter and
threshold comparator that produces CMOS data at the
RXA/B and RXA/B output pins. When the MIL-STD-1553
bus is idle and RXENA or RXENB are high, RXA/B will
be logic “0” on HI-2579 and logic “1” on HI-2581.
Each set of receiver outputs can also be independently
forced to the bus idle state (logic “0” on HI-2579 or logic
“1” on HI-2581) by setting RXENA or RXENB low.
MIL-STD-1553 Bus Interface
There are two ways of connecting to the MIL-STD-1553
bus, using a direct coupled interface or a transformer
coupled interface (see Figure 3).
A direct coupled interface uses the internal 1:2.5 ratio
isolation transformer and two 55Ω isolation resistors
between the transformer and the bus.
In a transformer coupled interface, the transceiver is
connected to the internal 1:2.5 isolation transformer
which in turn is connected to a 1:1.4 coupling transformer.
The transformer coupled method also requires two
coupling resistors equal to 75% of the bus characteristic
impedance (Zo) between the coupling transformer and
the bus. The coupling transformer and coupling resistors
are commonly integrated in a single device known as a
stub coupler.
Figure 4 and Figure 5 show test circuits for measuring
electrical characteristics of both direct and transformer
coupled interfaces respectively (see “Electrical
Characteristics” on the following pages) .
ABSOLUTE MAXIMUM RATINGS
Supply voltage (VDD)
Logic input voltage range
Receiver differential voltage
Driver peak output current
Power dissipation at 25°C
Solder Temperature
Junction Temperature
Storage Temperature
-0.3 V to +5 V
-0.3 V DC to +3.6 V
50 Vp-p
+1.0 A
1.0 W
245oC max.
175oC
-65oC to +150oC
RECOMMENDED OPERATING
CONDITIONS
Supply Voltage
Temperature Range
Industrial Screening
Hi-Temp Screening
VDD 3.3V ± 5%
-40oC to +85oC
-55oC to +125oC
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.
HOLT INTEGRATED CIRCUITS
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HI-2581 전자부품, 판매, 대치품
HI-2579, HI-2581
MIL-STD-1553
BUS A
(Direct Coupled)
Transceiver A
Transceiver B
Isolation
Transformer
55Ω BUSA
1:2.5
55Ω BUSA
Isolation
Transformer
BUSB
1:2.5
BUSB
MIL-STD-1553
Stub Coupler
52.5Ω
MIL-STD-1553
BUS B
(Transformer Coupled)
52.5Ω
1:1.4
HI-2579
Figure 3.  Bus Connections Example using HI-2579
VDD
Each Bus
TXA/B
TXA/B
RXA/B
RXA/B
MIL-STD-1553
Transceiver
Isolation
Transformer
HI-2579
55Ω
55Ω
BUSA/B
35Ω
BUSA/B
GND
Figure 4.  Direct Coupled Test Circuit
VDD
Each Bus
Point
“AD”
TXA/B
TXA/B
RXA/B
RXA/B
MIL-STD-1553
Transceiver
Isolation
Transformer
BUSA/B
BUSA/B
HI-2579
70Ω
GND
Figure 5.  Transformer Coupled Test Circuit
Point
“AT”
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HI-2581

3.3V MIL-STD-1553/1760 Dual Transceiver

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