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HOLTIC

HI-1579 Datasheet Preview

HI-1579 Datasheet

3.3V Monolithic Dual Transceivers

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July 2016
HI-1579, HI-1581
MIL-STD-1553 / 1760
3.3V Monolithic Dual Transceivers
DESCRIPTION
The HI-1579 and HI-1581 are low power CMOS dual
transceivers designed to meet the requirements of the
MIL-STD-1553 and MIL-STD-1760 specifications.
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 bus isolation
transformer. Separate transmitter inhibit control signals are
provided for each transmitter.
The receiver section of the each bus converts the 1553 bus
bi-phase data to complementary CMOS / TTL data suitable
for input to a Manchester decoder. Each receiver has a
separate enable input, which forces the receiver outputs to
logic "0" (HI-1579) or logic 1 (HI-1581).
To minimize the package size for this function, the
transmitter outputs are internally connected to the receiver
inputs, so that only two pins are required for connection to
each coupling transformer.
FEATURES
· Compliant to MIL-STD-1553A and B,
MIL-STD-1760 and ARINC 708A
· 3.3V single supply operation
PIN CONFIGURATIONS
-1
RXENA 2
GNDA 3
GNDA 4
GNDA 5
VDDB 6
VDDB 7
BUSB 8
BUSB 9
BUSB 10
BUSB 11
1579PCI
1579PCT
1579PCM
1581PCI
1581PCT
1581PCM
33 -
32 -
31 TXINHA
30 RXA
29 RXA
28 -
27 -
26 TXB
25 TXB
24 TXINHB
23 -
44 Pin Plastic 7mm x 7mm
Chip-scale package
VDDA 1
BUSA 2
BUSA 3
RXENA 4
GNDA 5
VDDB 6
BUSB 7
BUSB 8
RXENB 9
GNDB 10
1579PSI
1579PST
1579PSM
1581PSI
1581PST
1581PSM
20 TXA
19 TXA
18 TXINHA
17 RXA
16 RXA
15 TXB
14 TXB
13 TXINHB
12 RXB
11 RXB
20 Pin Plastic ESOIC - WB package
· Smallest footprint available in 7mm x 7mm
44 pin plastic chip-scale package (QFN)
· 1.0W typical power dissipation
(50% duty cycle)
· Industrial and extended temperature
ranges
· Industry standard pin configurations
VDDA 1
BUSA 2
BUSA 3
RXENA 4
GNDA 5
VDDB 6
BUSB 7
BUSB 8
RXENB 9
GNDB 10
1579CDI
1579CDT
1579CDM
1581CDI
1581CDT
1581CDM
20 TXA
19 TXA
18 TXINHA
17 RXA
16 RXA
15 TXB
14 TXB
13 TXINHB
12 RXB
11 RXB
20 Pin Ceramic DIP package
(DS1579 Rev. O)
HOLT INTEGRATED CIRCUITS
www.holtic.com
07/16




HOLTIC

HI-1579 Datasheet Preview

HI-1579 Datasheet

3.3V Monolithic Dual Transceivers

No Preview Available !

HI-1579, HI-1581
PIN DESCRIPTIONS
PIN
(DIP & SOIC)
PIN
(QFN)
SYMBOL
1
38, 39
VDDA
2
40, 41
BUSA
3
42, 43
BUSA
4 2 RXENA
5
3, 4, 5
GNDA
6 6, 7 VDDB
7 8, 9 BUSB
8
10, 11
BUSB
9 16 RXENB
10
17, 18, 19
GNDB
11 20 RXB
12 21 RXB
13 24 TXINHB
14 25 TXB
15 26 TXB
16 29 RXA
17 30 RXA
18 31 TXINHA
19 36 TXA
20 37 TXA
1, 12, 13, 14, 15 No
- 22, 23, 27, 28, 32 Connect
33, 34, 35, 44
FUNCTION
power supply
analog
analog
digital input
power supply
power supply
analog
analog
digital input
power supply
digital output
digital output
digital input
digital input
digital input
digital output
digital output
digital input
digital input
digital input
-
DESCRIPTION
+3.3 volt power for transceiver A
MIL-STD-1533 bus driver A, positive signal
MIL-STD-1553 bus driver A, negative signal
Receiver A enable. If low, forces RXA and RXA low
Ground for transceiver A
+3.3 volt power for transceiver B
MIL-STD-1533 bus driver B, positive signal
MIL-STD-1553 bus driver B, negative signal
Receiver B enable. If low, forces RXB and RXB low
Ground for transceiver B
Receiver B output, inverted
Receiver B output, non-inverted
Transmit inhibit, bus B. If high BUSB, BUSB disabled
Transmitter B digital data input, non-inverted
Transmitter B digital data input, inverted
Receiver A output, inverted
Receiver A output, non-inverted
Transmit inhibit, bus A. If high BUSA, BUSA disabled
Transmitter A digital data input, non-inverted
Transmitter A digital data input, inverted
-
FUNCTIONAL DESCRIPTION
The HI-1579 family of dual data bus transceivers contains
differential voltage source drivers and differential receiv-
ers. It is intended for applications using a MIL-STD-1553
A/B data bus. The device produces a trapezoidal output
waveform during transmission.
ceiver’s differential input stage drives a filter and threshold
comparator to produce 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-1579 and
logic “1” on HI-1581.
TRANSMITTER
Data input to the device’s transmitter section is from the
complementary CMOS inputs TXA/B and TXA/B. The
transmitter accepts Manchester II bi-phase data and con-
verts it to differential voltages on BUSA/B and BUSA/B.
The transceiver outputs are either direct- or transformer-
coupled to the MIL-STD-1553 data bus. Both coupling
methods produce a nominal voltage on the bus of 7.5 volts
peak to peak.
The receiver outputs are forced to the bus idle state (logic "0”
for HI-1579 or logic “1” for HI-1581) when the RXENA or
RXENB is low.
MIL-STD-1553 BUS INTERFACE
A direct-coupled interface (see Figure 2) uses a 1:2.5 ratio
isolation transformer and two 55 ohm isolation resistors
between the transformer and the bus. The primary center-tap
of the isolation transformer must be connected to GND.
The transmitter is automatically inhibited and placed in the
high impedance state when both TXA/B and TXA/B are
driven with the same logic state. A logic “1” applied to the
TXINHA/B input forces the transmitter to the high imped-
ance 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 trans-
former- coupled interface as the transmitter. The re-
In a transformer-coupled interface (see Figure 2), the
transceiver is also connected to a 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.
Figure 3 and Figure 4 show test circuits for measuring
electrical characteristics of both direct- and transformer-
coupled interfaces respectively. (See electrical
characteristics on the following pages).
HOLT INTEGRATED CIRCUITS
2


Part Number HI-1579
Description 3.3V Monolithic Dual Transceivers
Maker HOLTIC
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HI-1579 Datasheet PDF






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