Datasheet ACT4436-DI, ACT4436-DFI, ACT4436-DF, ACT4436-D Datasheet (ACT)

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ACT 4436 DUAL TRANSCEIVER

FOR MIL-STD-1553/1760

Features

★ Smaller Case Outline than ACT4487D

CIRCUIT TECHNOLOGY

• +5 / ±15 Volt Supply Operation

• Low Power Dissipation

• Outstanding MIL-STD-1553 performance

• Radiation Hard Dielectric Isolation Monolithic
Construction for Severe Environments

• Input and Output TTL Compatible Design

• Processed and Screened to MIL-STD-883 Specs

• MIL-PRF-38534 Compliant Devices Available

• DESC SMD# 5962-89447

TX DATA IN

TX DATA

TX INHIBIT IN

+5V (VL)

+15V (VCC)

-15V (V
GND1
GND2
GND3

RX DATA
RX DATA IN

CASE

RX STROBE IN

IN

EE)

IN

DRIVER

INPUT

AMPLIFIER

ACTIVE
FILTER

REFERENCE

ACTIVE
FILTER

OUTPUT
STAGE

COMP.

COMP.

Block Diagram (Without Transformer)

TX DATA OUT
TX DATA

OUT

OUT

RX DATA

RX DATA OUT

General Description

TheAeroflexCircuitTechnology
ACT 4436 is a next generation
monolithic transceiver design
which provides full compliance to
MIL-STD-1553A/Band1760re­quirements in a smaller package
with lower pin count then the
ACT4487D, for those designs with
less board space.

The ACT4436 series performs
the front-end analog function of
inputting and outputting data
through a transformer to the
MIL-STD-1553 data bus.

Design of this transceiver reflects
particular attention to active filter
performance. This results in low bit
and word error rate with superior
waveform purity and minimal zero
crossover distortion. Efficient
transmitter electrical and thermal
design provides low internal power
dissipation and heat rise at high as
well as low duty cycles.

Transmitter:

The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a

1.4:1 ratio transformer, isolated on
the data bus side with two 52.5
Ohm fault isolation resistors, and
loaded by two 70 Ohm
terminations, the data bus signal is
typically 7.5 Volts P-P at point A
(See Figure5). When both DATA
and DATA
high, the transmitter output
becomes a high impedance and is
“removed” from the line. In addition,

inputs are held low or

eroflex Circuit Technology – Data Bus Modules For The Future © SCD4436D REV B 3/10/98

an overriding “INHIBIT" input

Note overlap

provides for the removal of the
transmitter output from the line. A
logic “1” signal applied to the
“INHIBIT” takes priority over the
condition of the data inputs and
disables the transmitter (See
Transmitter Logic Waveform,
Figure1). The Transmitter may be
safely operated for an indefinite
period with the bus (point A) short
circuited at 100% duty cycle.

Receiver:

The Receiver section accepts
bi-phase differential data at the
input and produces two TTL signals
at the output. The outputs are DATA
and DATA
and negative excursions of the input
beyond a pre-determined threshold
(See Receiver Logic Waveform,
Figure 2).

The pre-set internal thresholds will
detect data bus signals, point A

, and represent positive

Figure 1 — Transmitter Logic Waveforms Idealized

DATA IN

DATA IN

Figure 5, exceeding 1.20 Volts
P-P and reject signals less than

0.6 Volts P-P when used with a
transformer (See Figure 5 for
transformer data and typical
connection).

A low level at the RX Strobe
input inhibits the DATA and
DATA

outputs. If unused, a 2K
pull-up to +5 Volts is
recommended.

INHIBIT

LINE TO LINE

OUTPUT

Note:

DATA and DATA

and must be in the same state during off times (both high or low).

inputs must be complementary waveforms or 50% duty cycle average, with no delays between them,

Figure 2 — Receiver Logic Waveforms Idealized (ACT4436D)

LINE TO LINE
INPUT

STROBE

DATA OUT

DATA OUT

Aeroflex Circuit Technology SCD4436D REV B 3/10/98/98 Plainview NY [phone]

2

Absolute Maximum Ratings

Operating case temperature -55°C to +125°C
Storage case temperature -65°C to +150°C
Power supply voltage

CC

V
VEE
VL

-0.3 V to +18 V
+0.3 V to-18 V

-0.3 V to +7.0 V
Logic input voltage -0.3 V to +5.5 V
Receiver differential input ±40 V

P-P

Receiver input voltage (common mode) ±10 V
Driver peak output current 300 mA
Total package power dissipation over the full operating case

temperature rise

(Note: Normal operation conditions require one

2.5 Watts

transceiver on and the other off)
Maximum junction to case temperature 10°C
Thermal resistance – junction to case 4°C/W

Electrical Characteristics — Driver Section

I nput Characteristics, TX DATA IN or TX DATA IN (Notes 2 & 3 apply)

Parameter Condition Symbol Min Typ Max Unit

"0" Input Current VIN = 0.4 V I
"1" Input Current V

= 2.7 V I

IN

"0" Input Voltage V
"1" Input Voltage V

Inhibit Characteristics

"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
Delay from TX inhibit, (0→1) to inhibited output From mid pt
Delay from TX inhibit, (1→0) to active output

Differential output noise, inhibit mode
Differential output impedance (inhibited) Note 1

See Figure 5

= 0.4 V I

V

IN

=2.7V I

V

IN

inhibit to
±1.2V pt B,
See Figure 5

Point B
Point C

Output Characteristics

Differential output level,
See Figure 5
Rise and fall times(10% to 90% at pt A output)
See Figure 5
Output offset, Figure 3, 2.5µS after midpoint crossing

of the parity bit of the last word of a 660µS message
See Figure 5

Delay from 50% point of TX DATA or TX DATA

input

to zero crossing of differential signal. See Fig 5 Point A

Point A V
Point A

Point A

ILD
IHD

IHD

IHD

ILI

IHI

V

ILI

V

IHI

t

DXOFF

t

DXON

V

NOI

Z

OI

Z

OI

V

t

DXT

t

OS

-0.1 -0.2

mA

1 40 µA

0.7

V

2.0 V

-0.1 -0.2

1.0 40

0.7

2.0
175 225

90 150

2 10 mV

2K
1K

O

r

6 7.5 9

100 160 200 nS

± 90

100 200

mA

µA

V
V

nS
nS

P-P

Ω
Ω

V

P-P

mV peak

nS

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Electrical Characteristics — Receiver Section

Parameter Condition Symbol Min Typ Max Unit

Differential Receiver Input Voltage Range
(See Figure 5, Point B)

TXFMR

1.4:1

V

Common Mode Rejection Ratio (Note 3) CMRR
"1" State – Rx Data or Rx Data

"0" State – Rx Data or Rx Data

Output IOH = -0.4 mA
Output IOI = 4 mA

V

V

Delay (average) from Differential Input Zero

t

Crossings to RX DATA and RX DATA

Output

DXT

50% points

Input Threshold Voltage (referred to the bus)

100KHz–1MHz

V

Strobe Characteristics (Logic "0" Inhibits Output)

"0" Input Current VS=0.4V
"1" Input Current V
"0" Input Voltage
"1" Input Voltage V
Strobe Delay (Turn-on or Turn-off)

=2.7V

S

V

t

IDR

OH

OL

TH

I

IL

I

IH

SD

40

V

P-P

45 dB

2.5 3.7 V

0.35

0.5

V

270 400 nS

0.60

0.75

-0.1

IL

IH

2.0
50 100

1.15 V

-0.2

1 +40

0.7

P-P

mA

µA

V
V

nS

Power Data

Power Supply Currents – Per Channel – See Figure 4

I

CC

I

I
I

I
I

I
I

EE

I

L
CC
EE

I

L
CC
EE

I

L
CC
EE

I

L

Transmitter Standby

25% duty cycle

50% duty cycle

100% duty cycle

Power Supply Voltages

V

±15V Operating Power Supply Voltage Range
+5V

Operating Power Supply Voltage Range) V

CC

VEE

Note 1. Power on or off, measured from 75KHz to 1MHz at point A and transformer self impedance of 3KΩ minimum

at 1MHz.

Note 2: Power Supplies: ±15 Volts ±0.75 V & +5 Volts ±0.5 V, bypassed by 10µF (Tantalum recommended)

Capacitor minimum. All measurements & specifications apply over the temperature range of -55°C to +125°C

(case temperature) unless otherwise specified.
Note 3: When measured as shown per Figure 5 with ± 10 Volt peak, line to ground, DC to 2MHz
Note 4: Typical power is measured with V

at point A = 7.5 V

BUS

P-P

+14.25

-14.25

L +4.50 +5.00 +5.50

0

12
18

45
12
18

90
12
18

180

12
18

+15.00

-15.00

1

16
30

50
20
30

100

20
30

200

20
30

+15.75

-15.75

mA

V

V

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Figure 3 – Transmitter (TX) Output Offset

POWER DISSIPATION

MILLIWATTS

Figure 5 – Typical 1553 Bus Connections

LAST BIT

Magnified View

0 Volts

2.5 µsec

OUTPUT OFFSET*

OUTPUT OFFSET

*

*Offset measured at point A in Figure 5

Figure 4 – Hybrid Power Dissipation vs. Duty Cycle

(Total hybrid with one channel transmitting

and the other not powered – 100% Duty Cycle)

3600
3200
2800
2400
2000
1600
1200
800
400

0.270
0

Note: Vcc= +15V, VEE = -15V, VL= +5V, Transformer ratio 1.4:1,

V

BUS

Typical Hybrid Input Power

Typical Hybrid

Dissipation

0 10 20 30 40 50 60 70 80 90 100

DUTY CYCLE – PERCENT

(point A) at 7.5VP-P.

2.97W

1.87W

Transformer Coupled Stub

ACT 4436

TX DATA OUT

TX DATA

OUT

RX DATA IN
RX DATA

IN

2:1

3

7

2

1

5

T1553-2

1:1.4

C

Zoi

Direct Coupled Stub

ACT 4436

TX DATA OUT

TX DATA

OUT

RX DATA IN
RX DATA

IN

Transformer Model use Technitrol Part# 1553-2

or equivalent

1.4:1

3
2

1

T1553-2

8

4

52.5Ω

B

52.5Ω

Zoi

VCM

52.5

52.5Ω

70Ω

Ω

A

A

70

Ω

Configurations and Ordering Information

ACT
Model # / Ordering Part #

ACT 4436-D Plug In 5962-TBA Normally Low
ACT 4436-DI Plug In 5962-8944708HUX Normally High
ACT 4436-DF Flat Package 5962-TBA Normally Low
ACT 4436-DFI Flat Package 5962-8944708HZX Normally High

Specifications subject to change without notice.

Aeroflex Circuit Technology SCD4436D REV B 3/10/98/98 Plainview NY [phone]

Case
Style

DESC

Number

5

Rx Standby

Figure 6 – Lead Numbers & Functions

ACT4436D – Plug In and Flat Package

Pin # Function Channel

1 TX DATA OUT/ RX DATA IN A
2 TX DATA

OUT/ RX DATA IN A
3 GROUND A
4 RX STROBE A
5 RX DATA

OUT A
6 RX DATA OUT A
7 CASE A
8 TX DATA OUT/ RX DATA IN B
9 TX DATA

OUT/ RX DATA IN B
10 GROUND B
11 RX STROBE B
12 RX DATA

OUT B
13 RX DATA OUT B
14 NC B
15 GROUND B
16 -V B
17 V

L B

18 TX INHIBIT B
19 TX DATA

IN B
20 TX DATA IN B
21 +V B
22 GROUND A
23 -V A
24 V

L A

25 TX INHIBIT A
26 TX DATA

IN A
27 TX DATA IN A
28 +V A

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CIRCUIT TECHNOLOGY

Plug In Package Outline

1.480 MAX.

1528

Pin 1 & ESD

Designator

.250

.100

.018

1.300

(13 Equal Spaces at .100)

Flat Package Outline

1.500 MAX.
.015

0.780
MAX.

14

0.210
MAX.

1528

.180

MAX.

.072

0.600

0.780

.400

MIN.

MAX.

.100

14

.010

1.300

(13 Equal Spaces at .100)

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7

Lead 1 & ESD

Designator

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35 South Service Road
Plainview New York 11830
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