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ACT4468DI

更新时间：2024-09-18 02:22:26

品牌：AEROFLEX

描述：ACT4468D Dual Transceivers for MIL-STD-1553

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ACT4468DI 概述

ACT4468D Dual Transceivers for MIL-STD-1553 ACT4468D双收发器为MIL -STD-1553

ACT4468DI 数据手册

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ACT4468D

Dual Transceivers for MIL-STD-1553

Features

CIRCUIT TECHNOLOGY

• World’s smallest and lowest standby power dual

transceiver 0.3" x 1" packages

www.aeroflex.com

General Description

• Dual transceiver meets military data bus

The Aeroflex Circuit Technology

requirements, MIL-STD-1553 and MIL-STD-1760

• Low power dissipation at full output power

• Single +5V power supply

Model ACT4468D is

generation D.I. monolithic transceiver

which provide full compliance with

MIL-STD-1553/1760 and data bus

requirements

the

smallest

• Current source output

• Monolithic construction using dielectrically

isolated(D.I.)

packages with the lowest standby

power consumption and one power

supply operation.

The dual channel Model ACT4468D

perform the front-end analog function

of inputting and outputting data

• Processed and screened to MIL-STD-883 specs

• DESC SMD# 5962–92061 Pending

through

transformer

MIL-STD-1553/1760 data bus.

Design of these transceivers 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.

Each channel of the dual transceiver

is completely separate from the other

and fully independent. This includes

power leads as well as signal lines.

Hence, each channel may be

connected to a different data bus with

no interaction.

ACT4468D Dual Transceiver

TX/RX

TX DATA IN

Transmitter:

OUTPUT

STAGE

DRIVER

SHAPING

TX/RX

TX DATA IN

The Transmitter section accepts

bi-phase TTL data at the input and

when coupled to the data bus with a

1:2.5 transformer, isolated on the

data bus side with two 52.5 Ohm fault

isolation resistors, and loaded by two

70 Ohm terminations plus additional

receivers, the data bus signal

produced is 7.5Volts nominal P-P at

A-A’. (See Figure 5.) When both

DATA and DATA inputs are held low or

high, the transmitter output becomes

TX INHIBIT

RX DATA OUT

COMP.

+5 V

REFERENCE

GROUND

RX DATA OUT

ACTIVE

FILTER

INPUT

AMP

STROBE

Block Diagram (without Transformer), 1/2 of unit shown

eroflex Circuit Technology – Data Bus Modules For The Future © SCD4468D REV B 5/25/00

a high impedance and is “removed”

from the line. In addition, an

overriding “INHIBIT" input provides

for the removal of the transmitter

output from the line. A logic “1”

applied to the “INHIBIT” takes

priority over the condition of the data

inputs and disables the transmitter.

(See Transmitter Logic Waveform,

Figure 1.)

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 represent positive and

negative excursions of the input

CIRCUIT TECHNOLOGY

beyond

threshold.(See

Waveform. Figure 2.)

pre-determined

Receiver Logic

The transceiver utilizes an active

filter to suppress harmonics above

1MHz. The Transmitter may be

safely operated at 100% duty cycle

for an indefinite period into a short

circuited 1553 bus.

The pre-set internal thresholds will

detect data bus signals exceeding

1.150 Volts P-P and reject signals

less than 0.6 volts P-P when used

with a 1:2.5 turns ratio transformer.

(See Figure 5 for transformer data

and typical connection.)

Figure 1. Transmitter Logic Waveforms

DATA IN

INHIBIT

LINE TO LINE

OUTPUT

NOTES:

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

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

Figure 2. Receiver Logic Waveforms

LINE TO LINE

INPUT

DATA OUT

Note overlap

NOTE: Waveforms shown are for normally low devices. For normally high receiver output

level devices, the receiver outputs are swapped as shown by the dashed lines.

Aeroflex Circuit Technology

SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700

Absolute Maximum Ratings

Operating Case Temperature

Storage Case Temperature

Positive Power Supply Voltage

Receiver Differential Input

-55°C to +125°C

-65°C to +150°C

-0.3 V to +7.0 V

±10 V

Receiver Input Voltage (Common Mode)

Driver Peak Output Current

±5 V

650 mA

Total Package Power Dissipation over the Full Operating Case

Temperature Rise

2 Watt

(Note: Normal operation conditions require one

transmitter on and the other off at any given time.

Maximum Junction To Case Temperature Rise for the Hottest

Device

10°C

Thermal Resistance, Junction to Bottom of Case

5°C/W

Electrical Characteristics – Driver Section

Input Characteristics, TX DATA in or TX DATA in

Parameter

Condition Symbol Min Typ Max

Unit

"0" Input Current

"1" Input Current

"0" Input Voltage

"1" Input Voltage

V_IN= 0.4 V

V_IN= 2.7 V

I_ILD

I_IHD

µA

-0.2

-0.4

V_IHD

0.7

2.0

Inhibit Characteristics

I_ILI

µA

-0.2

1.0

-0.4

"0" Input Current

"1" Input Current

"0" Input Voltage

"1" Input Voltage

V_IN=0.4V

V_IN=2.7V

I_IHI

V_ILI

0.7

V_IHI

Delay from TX inhibit,(0¡1) to inhibited out-

put

t_DXOFF

t_DXON

200

300

Delay from TX inhibit, (1¡0) to active output

150

V_NOI

Z_OI

Differential Output Noise, inhibit mode

Differential Output Impedance (inhibited)

mV p-p

Note 1

Output Characteristics

Differential output level

V_O

t_r

R_L=35 W

6.5

100

7.5

8.0

V p-p

Rise And Fall Times(10% to 90% of p-p out-

put)

170

300

±90

Output Offset at point A-A’on Fig 5., 2.5 µS

after midpoint crossing of the parity bit of the

last word of a 660 µS message

V_OS

mV peak

R_L=35 W

Delay from 50% point of TX DATA or TX

DATA input to zero crossing of differential

signal

t_DTX

100

150

Note 1. Power ON/OFF, measured from 75KHz to 1MHz at Point A-A. See Figure 5

Aeroflex Circuit Technology

SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700

Electrical Characteristics – Receiver Section

Parameter

Condition Symbol Min Typ Max

Unit

Differential Voltage Range, Figure 4 Point P-P’

Common Mode Rejection Ratio

V_IDR

V peak

CMRR

Strobe Characteristics (Logic "0" inhibits output) if not used, a 1K pullup to 5 V is recommended

I_IL

"0" Input Current

V_S=0.4 V

-0.4

-0.2

"1" Input Current

V_S=2.7V

I_IH

µA

+40

0.7

"0" Input Voltage

V_IL

V_IH

"1" Input Voltage

2.0

t_SD(ON)

Strobe Delay (turn-on)

Strobe Delay (turn-off)

100

t_SD(OFF)

Threshold Characteristics (Sinewave input )

100KHz-

Input Threshold Voltage(referred to the bus)

p-p

0.60

2.5

0.8

1.15

V_TH

1MHz

Output Characteristics, RX DATA and RX DATA

V_OH

V_OL

"1" State

I_OH=-0.4 mA

3.7

0.3

"0" State

I_OL= 4 mA

0.5

Delay, (average)from differential input zero

crossings to RX DATA and RX DATA output

50% points

t_DRX

250

400

Power Data

Maximum Currents, Per Channel (+5V)

Duty Cycle

Typ

Max

20 mA

155 mA

290 mA

560 mA

30 mA

185 mA

335 mA

650 mA

Transmitter Standby

25% duty cycle

50% duty cycle

100% duty cycle

Power Supply Voltage

4.75 to 5.5 Volts

Note 2. V_cc= 5 volts ±0.1 V, for all measurements unless otherwise specified.

Note 3. Specifications apply over the case temperature range of -55°C to +125°C unless otherwise specfied.

Note 4. All typical values are measured at +25°C

Aeroflex Circuit Technology

SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700

Figure 3 – Transmitter (TX) Output Waveform

Figure 4 – Transmitter (TX) Output Offset

LAST BIT

t *

90%

Magnified View

OUTPUT OFFSET*

6V P-P MIN

7.7V P-P MAX

0 volts

0 Volts

^{OUTPUT OFFSET}*

10%

2.5 µsec

t *

*Offset measured at point A-A’ in Fig 5

* Rise and fall times measured at point A-A’ in Fig 5

Figure 6 – Power Dissipation vs. Duty Cycle

(Total hybrid with one channel transmitting

and the other not powered)

Figure 5 – Typical Transformer Connection

70W

1600

1400

1200

52.5W

1:2.5

TX DATA OUT

D.U.T

Maximum

1000

1:1.77 for

stub

coupling

Center

Tap

800

Typical

600

A’

P’

B’

TX DATA OUT

RX DATA IN

400

200

52.5W

10 20 30 40 50 60 70 80 90 100

DUTY CYCLE – PERCENT

Note: Vcc = 5 Volts, V_bus(pt A-A') at 7.5 Volts P-P

Configurations and Ordering Information

Receiver Data level

Configuration

Model No.

DESC No.

Case

5962-92061(Pending)

ACT4468D

Normally Low

Normally High

DIP Package

Flat Package

Dual

ACT4468DF

ACT4468DI

DIP Package

Flat Package

Dual

ACT4468DFI

Normally High

Aeroflex Circuit Technology

SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700

CIRCUIT TECHNOLOGY

C IRC UIT TEC HNO LO G Y

Package Outline Drawings

"FLAT Package"

.990

1.010

Pin #’s & Functions

.890

.910

.008

.012

+5Vdc A

TX/RX A

ESD Triangle

Identifies Pin 1

STROBE A

GROUND A

+5Vdc B

.290

.310

TX/RX B

.400

TX/RX B

.050

.075

STROBE B

GROUND B

RX DATA OUT B

TX INHIBIT B

TX DATA IN B

RX DATA OUT A

TX INHIBIT A

TX DATA IN A

.016

.020

.098

.122

"DIP Package"

.990

1.010

.287

.303

.300

.008

.012

ESD Triangle

Identifies Pin 1

.025

.045

.150

.MIN

.098

.122

.016

.020

.890

.910

.05

.100

BSC

Notes

1. Dimensions shown are in inches

Specifications subject to change without notice.

Aeroflex Circuit Technology

35 South Service Road

Plainview New York 11803

Telephone: (516) 694-6700

FAX:

(516) 694-6715

Toll Free Inquiries: 1-(800)THE-1553

Aeroflex Circuit Technology

SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700

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