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HI-1574 반도체 회로 부품 판매점

(HI-1573 / HI-1574) 3.3V Monolithic Dual Transceivers



Holt Integrated Circuits 로고
Holt Integrated Circuits
HI-1574 데이터시트, 핀배열, 회로
April 2015
HI-1573, HI-1574
MIL-STD-1553
3.3V Monolithic Dual Transceivers
DESCRIPTION
PIN CONFIGURATIONS
The HI-1573 and HI-1574 are low power CMOS dual
transceivers designed to meet the requirements of the
MIL-STD-1553 specification.
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 differential 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-1573) or logic “1” (HI-
1574).
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. For designs requiring
independent access to transmitter and receiver 1553
signals, please contact your Holt Sales representative.
FEATURES
! Compliant to MIL-STD-1553A and B,
ARINC 708A
! 3.3V single supply operation
! Smallest footprint available in 7 mm x 7 mm
44- pin plastic chip-scale package (QFN)
! Less than 0.5W maximum power dissipation
! Available in DIP and small outline (ESOIC)
package options
! Industrial and extended temperature ranges
! Industry standard pin configurations
N/C 1
RXENA 2
GNDA 3
GNDA 4
GNDA 5
VDDB 6
VDDB 7
BUSB 8
BUSB 9
BUSB 10
BUSB 11
1573PCI
1573PCT
1573PCM
1574PCI
1574PCT
1574PCM
33 N/C
32 N/C
31 TXINHA
30 RXA
29 RXA
28 N/C
27 N/C
26 TXB
25 TXB
24 TXINHB
23 N/C
44 Pin Plastic 7mm x 7mm
Chip-scale package (QFN)
VDDA 1
BUSA 2
BUSA 3
RXENA 4
GNDA 5
VDDB 6
BUSB 7
BUSB 8
RXENB 9
GNDB 10
1573PSI
1573PST
1573PSM
1574PSI
1574PST
1574PSM
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
VDDA 1
BUSA 2
BUSA 3
RXENA 4
GNDA 5
VDDB 6
BUSB 7
BUSB 8
RXENB 9
GNDB 10
1573CDI
1573CDT
1573CDM
1574CDI
1574CDT
1574CDM
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
(DS1573 Rev. S)
HOLT INTEGRATED CIRCUITS
www.holtic.com
04/15


HI-1574 데이터시트, 핀배열, 회로
HI-1573, HI-1574
PIN DESCRIPTIONS
PIN
(DIP & SOIC) SYMBOL FUNCTION
1
VDDA
power supply
2
BUSA
analog
3
BUSA
analog
4
RXENA
digital input
5
GNDA
power supply
6
VDDB
power supply
7
BUSB
analog
8
BUSB
analog
9
RXENB
digital input
10
GNDB
power supply
11
RXB
digital output
12
RXB
digital output
13
TXINHB
digital input
14 TXB digital input
15 TXB digital input
16
RXA
digital output
17
RXA
digital output
18
TXINHA
digital input
19 TXA digital input
20 TXA 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 (HI-1573) or High (HI-1574)
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 (HI-1573) or High (HI-1574)
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-1573 family of data bus transceivers contains differ-
ential voltage source drivers and differential receivers. They
are intended for applications using a MIL-STD-1553 A/B
data bus. The device produces a trapezoidal output wave-
form during transmission.
The receiver’s differential input stage drives 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-1573 and logic “1” on HI-1574.
TRANSMITTER
The receiver outputs are forced to the bus idle state (logic "0”
on HI-1573 or logic “1” on HI-1574) when RXENA or RXENB
Data input to the device’s transmitter section is from the com- is low.
plementary CMOS inputs TXA/B and TXA/B. The transmit-
ter accepts Manchester II bi-phase data and converts it to dif- MIL-STD-1553 BUS INTERFACE
ferential voltages on BUSA/B and BUSA/B. The transceiver
outputs are either direct- or transformer-coupled to the MIL- A direct-coupled interface (see Figure 2) uses a 1:2.5 ratio
STD-1553 data bus. Both coupling methods produce a nomi- isolation transformer and two 55 ohm isolation resistors
nal voltage on the bus of 7.5 volts peak to peak.
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 In a transformer-coupled interface (see Figure 2), the
driven with the same logic state. A logic “1” applied to the transceiver is connected to a 1:1.79 isolation transformer
TXINHA/B input will force the transmitter to the high imped- which in turn is connected to a 1:1.4 coupling transformer.
ance state, regardless of the state of TXA/B and TXA/B.
The transformer-coupled method also requires two coupling
resistors equal to 75% of the bus characteristic impedence
RECEIVER
(Zo) between the coupling transformer and the bus.
The receiver accepts bi-phase differential data from the MIL-
STD-1553 bus through the same direct- or transformer-
coupled interface as the transmitter.
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
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HI-1574 transceiver

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