900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






HOLTIC

HI-1579A Datasheet Preview

HI-1579A Datasheet

3.3V Monolithic Dual Transceivers

No Preview Available !

November 2016
HI-1579A
MIL-STD-1553 / 1760
3.3V Monolithic Dual Transceivers
DESCRIPTION
The HI-1579A is a low power CMOS dual transceiver
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 both receive output
signals to the bus idle state (logic "0") when disabled.
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.
PIN CONFIGURATIONS
VDDA 1
BUSA 2
BUSA 3
RXENA 4
GNDA 5
VDDB 6
BUSB 7
BUSB 8
RXENB 9
GNDB 10
1579APSI
1579APST
1579APSM
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
FEATURES
· Compliant to MIL-STD-1553A and B,
MIL-STD-1760 and ARINC 708A
· 3.3V single supply operation
· Industrial and extended temperature
ranges with optional burn-in
(DS1579A_New)
HOLT INTEGRATED CIRCUITS
www.holtic.com
11/16




HOLTIC

HI-1579A Datasheet Preview

HI-1579A Datasheet

3.3V Monolithic Dual Transceivers

No Preview Available !

PIN DESCRIPTIONS
PIN
(DIP & SOIC)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SYMBOL
VDDA
BUSA
BUSA
RXENA
GNDA
VDDB
BUSB
BUSB
RXENB
GNDB
RXB
RXB
TXINHB
TXB
TXB
RXA
RXA
TXINHA
TXA
TXA
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
HI-1579A
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-1579A dual transceiver contains differential
voltage source drivers and differential receivers. It is
intended for applications using a MIL-STD-1553 A/B data
bus. The device produces a trapezoidal output waveform
during transmission.
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
converts 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 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
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 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”.
The receiver outputs are forced to the bus idle state (logic "0”)
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.
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-1579A
Description 3.3V Monolithic Dual Transceivers
Maker HOLTIC
PDF Download

HI-1579A Datasheet PDF






Similar Datasheet

1 HI-1579 3.3V Monolithic Dual Transceivers
HOLTIC
2 HI-1579A 3.3V Monolithic Dual Transceivers
HOLTIC





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy