HI-1570
July 2009
MIL-STD-1553 / 1760
5V Monolithic Dual Variable AmplitudeTransceiver
PIN CONFIGURATIONS
44 N/C
43 BUSA
42 BUSA
41 BUSA
40 BUSA
39 V
CONT
A&B
38 V
CONT
A&B
37 TXA
36 TXA
35 N/C
34 N/C
N/C 1
RXENA 2
GNDA 3
GNDA 4
GNDA 5
VDDA/B 6
VDDA/B 7
BUSB 8
BUSB 9
BUSB 10
BUSB 11
DESCRIPTION
The HI-1570 is a low power CMOS dual +5V transceiver
with the ability to vary the amplitude of the transmitter
outputs. It is designed to meet the requirements of the
MIL-STD-1553 / 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. A single pin allows the
user to control the transmitter output amplitude.
The receiver section of each bus converts the 1553 bus
bi-phase 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 the output of the receiver to a logic “0“.
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.
1570PCI
1570PCT
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
V
CONT
A&B 1
BUSA 2
BUSA 3
RXENA 4
GNDA 5
VDDA/B 6
BUSB 7
BUSB 8
RXENB 9
GNDB 10
20
19
18
17
16
15
14
13
12
11
TXA
TXA
TXINHA
RXA
RXA
TXB
TXB
TXINHB
RXB
RXB
FEATURES
!
!
!
!
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!
!
!
Compliant to MIL-STD-1553A & B,
MIL-STD-1760, ARINC 708A
CMOS technology for low standby power
Single +5V power supply
Variable transmitter output amplitude
Smallest footprint available in 7mm x 7mm
plastic chip-scale (QFN) package with
integral heatsink
Less than 1.0W maximum power dissipation
Industrial and extended temperature ranges
Industry standard pin configurations
20 Pin Plastic ESOIC - WB package
V
CONT
A&B 1
BUSA 2
BUSA 3
RXENA 4
GNDA 5
VDDA/B 6
BUSB 7
BUSB 8
RXENB 9
GNDB 10
20 TXA
19 TXA
18 TXINHA
17 RXA
20 Pin Ceramic DIP package
(DS1570 Rev. G)
HOLT INTEGRATED CIRCUITS
www.holtic.com
N/C 12
N/C 13
N/C 14
N/C 15
RXENB 16
GNDB 17
GNDB 18
GNDB 19
RXB 20
RXB 21
N/C 22
1570PSI
1570PST
1570PSM
1570CDI
1570CDT
1570CDM
16 RXA
15 TXB
14 TXB
13 TXINHB
12 RXB
11 RXB
07/09
HI-1570
PIN DESCRIPTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SYMBOL
V
CONT
A/B
BUSA
BUSA
RXENA
GNDA
VDDA/B
BUSB
BUSB
RXENB
GNDB
RXB
RXB
TXINHB
TXB
TXB
RXA
RXA
TXINHA
TXA
TXA
FUNCTION
analog Input
analog output
analog output
digital input
power supply
power supply
analog output
analog output
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
Transmit output amplitude control (0 - 5 Vdc, see Figure 4)
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 bus A
+5 volt power for both bus A and bus 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 bus 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-1570 data bus transceiver contains differential volt-
age source drivers and differential receivers. They are in-
tended 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 / TTL 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 cou-
pled to the MIL-STD-1553 data bus. Both coupling meth-
ods produce a nominal voltage on the bus of 7.5 volts peak
to peak at V
CONT
A&B = 5.0 Vdc. Refer to Figure 4 for
transmitter output amplitudes at other values of V
CONT
A&B between 0 - 5 Vdc. (Contact your Holt Sales Repre-
sentative about the 0 - 10 Vdc Control Voltage option).
The transmitter is automatically inhibited and placed in the
high impedance state when both TXA/B and TXA/B are ei-
ther at a logic “1” or logic “0” simultaneously. A logic “1” ap-
plied to the TXINHA/B input will force 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 differ-
ential input stage drives a filter and threshold comparator
that produces CMOS/TTL data at the RXA/B and RXA/B
output pins.
Each set of receiver outputs can be independently forced
to a logic "0" by setting RXENA or RXENB 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.
In a transformer coupled interface (see Figure 3), the
transceiver is connected to a 1:1.79 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.
HOLT INTEGRATED CIRCUITS
2
HI-1570
Each Bus
TRANSMITTER
V
CONT
A&B
TXA/B
Transmit
Logic
TXA/B
BUSA/B
TXINHA/B
RECEIVER
RXA/B
Receive
Logic
RXA/B
RXENA/B
Comparator
Input
Filter
Data Bus
Isolation
Transformer
BUSA/B
Slope
Control
Coupler
Network
Direct or
Transformer
Figure 1. Block Diagram
TRANSMIT WAVEFORM - EXAMPLE PATTERN
TXA/B
TXA/B
BUSA/B - BUSA/B
RECEIVE WAVEFORMS - EXAMPLE PATTERN
Vin
(Line to Line)
RXA/B
RXA/B
HOLT INTEGRATED CIRCUITS
3
HI-1570
ABSOLUTE MAXIMUM RATINGS
Supply voltage (VDD)
Logic input voltage range
Receiver differential voltage
Driver peak output current
Power dissipation at 25°C
ceramic DIL, derate
Solder Temperature
Junction Temperature
Storage Temperature
-0.3 V to +7 V
-0.3 V dc to +5.5 V
10 Vp-p
Temperature Range
+1.0 A
1.0 W
7mW/°C
275°C for 10 sec.
175°C
-65°C to +150°C
Industrial Screening.........-40°C to +85°C
Hi-Temp Screening........-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.
RECOMMENDED OPERATING CONDITIONS
Supply Voltage
VDD....................................... 5V... ±5%
DC ELECTRICAL CHARACTERISTICS
VDD = 5.0V, GND = 0V, V
CONT
A/B = 5.0V, T
A
= Operating Temperature Range (unless otherwise specified).
PARAMETER
Operating Voltage
Total Supply Current
SYMBOL
VDD
ICC1
ICC2
ICC3
CONDITION
Not Transmitting
Transmit one bus @
50% duty cycle
Transmit one bus @
100% duty cycle
Not Transmitting
Transmit one bus @
100% duty cycle
Digital inputs
Digital inputs
V
IH
= 4.9V, Digital inputs
V
IL
= 0.1V, Digital inputs
I
OUT
= -0.4mA, Digital outputs
I
OUT
= 4.0mA, Digital outputs
MIN
4.75
TYP
5
20
200
400
MAX
5.25
30
340
550
0.11
UNITS
V
mA
mA
mA
W
W
V
Power Dissipation
PD1
PD2
0.70
2.0
1.4
1.4
0.95
Min. Input Voltage
Max. Input Voltage
Min. Input Current
Max. Input Current
Min. Output Voltage
Max. Output Voltage
RECEIVER
Input resistance
Input capacitance
(HI)
(LO)
(HI)
(LO)
(HI)
(LO)
V
IH
V
IL
I
IH
I
IL
V
OH
V
IH
0.8
20
V
µA
µA
V
-20
2.7
0.4
V
K
W
(Measured at Point “A
D
“ in Figure 2 unless otherwise specified)
R
IN
C
IN
CMRR
V
IN
V
ICM
Detect
No Detect
V
THD
V
THND
V
THD
V
THND
1 Mhz Sine Wave
(Measured at Point “A
D
“ in Figure 2)
1 MHz Sine Wave
(Measured at Point “A
T
“ in Figure 3)
Differential
-5.0
1.15
Differential
Differential
40
9
5.0
20.0
0.28
0.86
14.0
0.20
20
5
pF
dB
Vp-p
V-pk
Vp-p
Vp-p
Vp-p
Vp-p
Common mode rejection ratio
Input Level
Input common mode voltage
Threshold Voltage - Direct-coupled
Threshold Voltage - Transformer-coupled Detect
No Detect
HOLT INTEGRATED CIRCUITS
4
HI-1570
DC ELECTRICAL CHARACTERISTICS (cont.)
VDD = 5.0V, GND = 0V, V
CONT
A/B = 5.0V, T
A
= Operating Temperature Range (unless otherwise specified).
PARAMETER
TRANSMITTER
Output Voltage
SYMBOL
CONDITION
35
W
load
(Measured at Point “A
D
“ in Figure 2)
70
W
load
(Measured at Point “A
T
“ in Figure 3)
Differential, inhibited
35
W
load
(Measured at Point “A
D
“ in Figure 2)
70
W
load
(Measured at Point “A
T
“ in Figure 3)
Differential, not transmitting
1 MHz sine wave
MIN
TYP
MAX
UNITS
(Measured at Point “A
D
” in Figure 2 unless otherwise specified)
Direct coupled
Transformer coupled
V
OUT
V
OUT
V
ON
Direct coupled
V
DYN
V
DYN
R
OUT
C
OUT
R
CONT
7.0
20.0
9.0
27.0
10.0
-90
-250
10
15
5
90
250
Vp-p
Vp-p
mVp-p
mV
mV
K
W
pF
K
W
Output Noise
Output Dynamic Offset Voltage
Transformer coupled
Output Resistance
Output Capacitance
Control Line Resistance
AC ELECTRICAL CHARACTERISTICS
VDD = 5.0V, GND = 0V, V
CONT
A/B = 5.0V, T
A
=Operating Temperature Range (unless otherwise specified).
PARAMETER
RECEIVER
Receiver Delay
Receiver Enable Delay
TRANSMITTER
Driver Delay
Rise time
Fall Time
Inhibit Delay
SYMBOL
tDR
tREN
TEST CONDITIONS
From input zero crossing to RXA/B or RXA/B
From RXENA/B rising or falling edge to
RXA/B or RXA/B
MIN
TYP
MAX
450
40
UNITS
ns
ns
(Measured at Point “A
D
” in Figure 2)
(Measured at Point “A
D
” in Figure 2)
tDT
tr
tf
tDI-H
tDI-L
TXA/B, TXA/B to BUSA/B, BUSA/B
35 ohm load
35 ohm load
Inhibited output
Active output
100
100
150
300
300
100
150
ns
ns
ns
ns
ns
TRANSMITTER
TXA/B
TXA/B
TXINHA/B
V
CONT
A&B
55
W
Point “A
D
“
35
W
55
W
2.5:1
BUSA/B
1:2.5
55
W
35
W
Point “A
D
“
BUSA/B
Isolation
Transformer
55
W
RECEIVER
RXA/B
RXA/B
Isolation
Transformer
RXENA/B
Figure 2. Direct Coupled Test Circuits
HOLT INTEGRATED CIRCUITS
5
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