Datasheet ACT4402 Datasheet (ACT)

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eroflex Circuit T

– Data Bus Modules For The Future © SCD4402 REV A 5/28/99

ACT4402 SINGLE TRANSCEIVER

FOR MIL-STD-1553/1760

Features

• +5 / ±15 Volt Supply Operation

• Low Power Dissipation

• Outstanding MIL-STD-1553 performance

• Superior High Frequency Line Transient and Input
Ripple Rejection

• Input and Output TTL Compatible Design

• Processed and Screened to MIL-STD-883 Specs

• MIL-PRF-38534 Compliant Devices Available

• Replacement for Aeroflex’s 3402 & 2402

• Packaging – Hermetic Ceramic

■ Available in a 24pin Ceramic Housing which is 21%

smaller than the metal plug-in

■ Non-conductive mounting surface

■ No package glass beads

■ Small size & light weight

CIRCUIT TECHNOLOGY

General Description

The Aeroflex Circuit Technology
ACT4402 is a next generation
monolithic transceiver design
which provide full compliance to
MIL-STD-1553A/B and 1760
requirements in a small ceramic
package with low power
consumption.

The ACT4402 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.

TX DATA IN

IN

TX DATA

TX INHIBIT IN

+5V (VL)

+15V (VCC)

EE)

-15V (V

GND1

GND2

GND3

IN

RX DATA

RX DATA IN

CASE

RX STROBE IN

DRIVER

INPUT

AMPLIFIER

ACTIVE
FILTER

REFERENCE

ACTIVE
FILTER

OUTPUT
STAGE

COMP.

COMP.

Block Diagram (Without Transformer)

echnology

TX DATA OUT

TX DATA

OUT

OUT

RX DATA

RX DATA OUT

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,
an overriding “INHIBIT" input

inputs are held low or

Aeroflex Circuit Technology SCD4402 REV A 5/28/99 Plainview NY [phone]

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
Figure 5, exceeding 1.20 Volts P-P
and reject signals less than 0.6
Volts P-P when used with a

Figure 1 — Transmitter Logic Waveforms Idealized

DATA IN

DATA IN

, and represent positive

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 (ACT4402)

LINE TO LINE
INPUT

STROBE

DATA OUT

DATA OUT

2

Note overlap

Aeroflex Circuit Technology SCD4402 REV A 5/28/99 Plainview NY [phone]

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

2.5 Watts

temperature rise

Maximum junction to case temperature 10°C

Thermal resistance – junction to case 4°C/W

Electrical Characteristics — Driver Section

Input 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

ILD

IHD

IHD

IHD

ILI

IHI

V

ILI

V

IHI

t

DXOFF

t

DXON

V

NOI

Z

OI

Z

OI

-0.1 -0.2

mA

1 40 µA

0.7

2.0 V

-0.1 -0.2

mA

1.0 40

0.7

2.0

175 225

90 150

2 10 mV

2K

1K

V

µA

V

V

nS

nS

P-P

Ω
Ω

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 V

Point A

Point A

V

Point A t

3

t

OS

DXT

O

r

6 7.5 9

100 160 300 nS

± 90

mV peak

100 200

V

nS

P-P

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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
Crossings to RX DATA and RX DATA

Output 50%

t

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

= 2.7V

S

"0" Input Voltage

"1" Input Voltage V

Strobe Delay (Turn-on or Turn-off)

Power Data

Power Supply Currents – Per Channel – See Figure 4

Transmitter Standby

25% duty cycle

50% duty cycle

100% duty cycle

IDR

OH

OL

DXT

TH

I

IL

I

IH

V

t

SD

I

CC

I

EE

I

L

I

CC

I

EE

I

L

I

CC

I

EE

I

L

I

CC

I

EE

I

L

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

12
18

45
12
18
90
12
18

180

12
18

1.20 V

-0.2

1 +40

0.7

50 100

0

1

16
30

50
20
30

100

20
30

200

20
30

P-P

mA

µA

V

V

nS

mA

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

4

+14.25

-14.25

L +4.50 +5.00 +5.50

+15.00

-15.00

+15.75

-15.75

V

V

Aeroflex Circuit Technology SCD4402 REV A 5/28/99 Plainview NY [phone]

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

3600

0.270

3200

2800

2400

2000

1600

1200

800

400

0

Typical Hybrid Input Power

Typical Hybrid

Dissipation

0 10 20 30 40 50 60 70 80 90 100

DUTY CYCLE – PERCENT

2.97W

1.87W

Transformer Coupled Stub

ACT4402

TX DATA OUT

TX DATA

OUT

RX DATA IN

RX DATA

IN

2:1

3

7

2

1

5

T1553-2

C

Zoi

Direct Coupled Stub

ACT4402

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

1:1.4

VCM

52.5

52.5Ω

70Ω

Ω

A

A

70

Ω

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

(point A) at 7.5VP-P.

V

BUS

Configuration and Ordering Information

ACT
Model # / Ordering Part #

ACT4402 Ceramic Dip TBA Normally Low

ACT4402-I Ceramic Dip TBA Normally High

Specifications subject to change without notice.

Case

Style

5

DESC

Number

Rx Standby

Aeroflex Circuit Technology SCD4402 REV A 5/28/99 Plainview NY [phone]

Figure 6 – Lead Numbers & Functions

ACT4402

Pin # Function

1 TX DATA OUT

2 TX DATA

OUT

3 GROUND

4 NC

5 NC

6 NC

7 RX DATA OUT

8 STROBE

9 GROUND

10 RX DATA

OUT

11 NC

12 NC

13 V

CC

14 NC

15 RX DATA IN

16 RX DATA

IN

17 NC

18 CASE

19 V

EE

20 +5 V

21 TX INHIBIT

22 TX DATA IN

23 TX DATA

IN

24 NC

6

Aeroflex Circuit Technology SCD4402 REV A 5/28/99 Plainview NY [phone]

Pin# 1 & ESD

Designator

CIRCUIT TECHNOLOGY

Ceramic Package Outline

1324

12

.200

MAX

.030
.010

1.270
MAX

.019

.050
TYP

All dimensions in inches

.015

.150
MIN

.620

MAX

.610
.590

.012
.008

Aeroflex Circuit Technology
35 South Service Road
Plainview New York 11803
www.aeroflex.com

7

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