ACT4489DF datasheet, PDF - EEWORLD Datasheet

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ACT4489DF: DescriptionDATACOM, MIL-STD-1553 DATA BUS TRANSCEIVER, DFP36, DFP-36; CategoryWireless rf/communication Telecom circuit; File Size545KB，7 Pages; ManufacturerCobham Semiconductor Solutions

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ACT4489DF Overview

DATACOM, MIL-STD-1553 DATA BUS TRANSCEIVER, DFP36, DFP-36

ACT4489DF Parametric

Parameter Name	Attribute value
Maker	Cobham Semiconductor Solutions
Parts packaging code	DFP
package instruction	DFP,
Contacts	36
Reach Compliance Code	unknown
Is Samacsys	N
JESD-30 code	R-XDFP-F36
Negative supply voltage rating	-12 V
Number of functions	1
Number of terminals	36
Maximum operating temperature	125 °C
Minimum operating temperature	-55 °C
Package body material	UNSPECIFIED
encapsulated code	DFP
Package shape	RECTANGULAR
Package form	FLATPACK
Certification status	Not Qualified
Maximum seat height	4.445 mm
Nominal supply voltage	12 V
surface mount	YES
Telecom integrated circuit types	MIL-STD-1553 DATA BUS TRANSCEIVER
Temperature level	MILITARY
Terminal form	FLAT
Terminal pitch	2.54 mm
Terminal location	DUAL
Base Number Matches	1

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Standard Products

ACT4489 Dual Transceiver

for MIL-STD-1553A/B, MIL-STD-1760 & SAE-AS15531

www.aeroflex.com/Avionics

February 24, 2005

FEATURES

❑

Small size, light weight and low power dissipation dual transceiver

+5V / ±12V DC power supply operation

Outstanding MIL-STD-1553 / SAE-AS15531 performance

Monolithic construction

Input and output TTL compatible design

Designed for commercial, industrial and aerospace applications

MIL-PRF-38534 compliant devices available

Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer

DSCC Standard Microcircuit Drawing (SMD): Pending

GENERAL DESCRIPTION

The Aeroflex-Plainview ACT4489 is the next generation monolithic transceiver design which provides full

compliance with MIL-STD-1553A/B, MIL-STD-1760 and meets SAE-AS15531 requirements in the smallest

package with lower pin count for those designs with less board space. The series performs the front-end analog

function of inputting and outputting data through a transformer to the MIL-STD-1553 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.

TRANSMITTER

The transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 ratio

transformer the data bus signal is typically 7.0 Volts P-P at Point A (See Figure 5). When both DATA and DATA

inputs are held low or high, the transmitter output becomes 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

Figure 1 Transmitter Logic Waveform). 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 represent positive and negative excursions of the input beyond a pre-determined

threshold (See Figure 2 Receiver Logic Waveform).

The pre-set internal thresholds will detect data bus signals 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 connections).

A low level at the RX STROBE IN input inhibits the DATA and DATA outputs. If unused, a 2K pull-up to +5 Volts

is recommended.

SCD4489D Rev B

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