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ACT4480-DFI の電気的特性と機能

ACT4480-DFIのメーカーはAeroflex Circuit Technologyです、この部品の機能は「Dual Transceiver」です。


製品の詳細 ( Datasheet PDF )

部品番号 ACT4480-DFI
部品説明 Dual Transceiver
メーカ Aeroflex Circuit Technology
ロゴ Aeroflex Circuit Technology ロゴ 




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ACT4480-DFI Datasheet, ACT4480-DFI PDF,ピン配置, 機能
Standard Products
ACT4480-DFI Dual Transceiver
for H009 Specification
www.aeroflex.com/avionics
February 27, 2013
FEATURES
Dual transceiver meets McDonnell Douglas H009 data bus specifications
Operates with ±12V to ±15 and +5V power supplies
Monolithic construction using linear ASICs
Packaging Low profile ceramic
- 0.60''W x 0.80''L x 0.14''H
Designed for commercial, industrial and aerospace applications
Full MIL-PRF-38534 qualification pending
DESCRIPTION
The Aeroflex Plainview transceiver model ACT4480-DFI is a new generation monolithic transceiver which
provides compliance with H009 data bus requirements using three DC power supplies operation. The
dual channel ACT4480-DFI performs the front-end analog function of inputting and outputting data
through a transformer to a H009 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. The active filter
design provides the required H009 low harmonic distortion waveform without increasing the pulse delay
characteristics significantly. Efficient transmitter electrical and thermal design provides low internal power
dissipation and heat rise at high and well as low duty cycles. The receiver input threshold is set internally.
TRANSMITTER
The Transmitter section accepts complementary TTL data at the input, and when coupled to the data
bus with a 1:1 transformer, isolated on the transceiver side with two 34 Ohm bus terminating resistors, with
the bus terminated by a 175 Ohm resistor, the data bus signal produced is 20VP-P nominal at A-A' (See
Figure 5). When both DATA and DATA inputs are held low or high, the transmitter output remains a low
impedance and signal is “removed” from the line. In addition, an overriding “INHIBIT" input returns the
output to a high impedance state. A logic “1” applied to the “INHIBIT” takes priority over the condition of
the data inputs and disables the transmitter (See Transmitter Logic Waveforms - Figure 2).
The transmitter utilizes an active filter to suppress harmonics above 1MHz to meet H009 specifications.
The transmitter may be safely operated for an indefinite period at 100% duty cycle into a data bus short
circuit.
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 Receiver Logic Waveforms - Figure 3).
The internal threshold is nominally set to detect data bus signals exceeding 2.0VP-P when used with a
1:1 turns ratio transformer (See Figure 5 for transformer data and typical connection).
A low level at the Strobe input inhibits the DATA and DATA outputs (Pin is internally pulled up).
SCD4480-DFI

1 Page





ACT4480-DFI pdf, ピン配列
ELECTRICAL CHARACTERISTICS RECEIVER SECTION 1/ 2/
Parameter
Condition Symbol Min Typ Max
Differential Voltage Range
Common Mode Rejection Ratio
3/
3/
Point A - A'
-
VIDR
CMMR
- - 20
45 -
-
Unit
VPEAK
dB
STROBE CHARACTERISTICS (Logic '0' Inhibits Output) (NOTE: If not used, a 1K pullup to 5V is recommended)
"0" Input Current
VS = 0.4V
IIL
- - 0.2 - 0.4 mA
"1" Input Current
VS = 2.7V
IIH
-
1 + 40
µA
"0" Input Voltage
-
VIL
- - 0.7
V
"1" Input Voltage
-
VIH 2.0 - -
V
Strobe Delay (turn-on or turn-off)
-
TSD(ON/OFF)
-
90 150
nS
THRESHOLD CHARACTERISTICS (Sinewave Input )
Internal Threshold Voltage, Point A-A'
Figure 5
1MHz
VTH
1.5 2.0 3.0
VP-P
OUTPUT CHARACTERISTICS, RX DATA AND RX DATA
"1" State
IOH = -0.4mA
VOH
"0" State
IOL = 4mA
VOL
Delay, (average) from differential input zero
crossings to RX DATA and RX DATA output
6/
50% points
tDRX
2.5 3.6
-
- 0.35 0.5
- 300 450
V
V
nS
POWER SUPPLY CURRENT
VCC = +12V to +15V, VEE = -12V to -15V, VL = +5V
Duty Cycle
Condition
Symbol
Transmitter Standby
Point A - A'
ZO = 175Ω,
VO = 21VP-P
ICC
IEE
IL
50%
Figure 5
ICC
IEE
IL
Typ Max Unit
12 20
30 50
32 40
52 66 mA
70 90
32 40
100%
ICC 95 120
IEE 112 130
IL 32 40
Notes:
1. VCC = +15Volts ± 0.75V, VEE= -15Volts ± 0.75V, VIL = +5 Volts ± 0.5V, TC = -55°C to +125°C, unless otherwise specified.
2. All typical values are measured at +25°C.
3. Characteristics guaranteed by design, not production tested.
4. Power ON/OFF, measured 1MHz at Point A-A' Figure 4.
5. At point A-A' on Figure 4 or 5, 2.5µS after midpoint crossing of the parity bit of the last word.
6. This test is performed while the Transceiver is reading its own transmission. This condition is called "Wraparound". Standard TTL
loads applied to RX DATA Outputs.
SCD4480-DFI Rev B 2/27/2013
3
Aeroflex Plainview


3Pages


ACT4480-DFI 電子部品, 半導体
FIGURE 3 RECEIVER LOGIC WAVEFORMS
*Offset measured at point A-A’ in Figure 5
FIGURE 4 TRANSMITTER (TX) OUTPUT OFFSET
SCD4480-DFI Rev B 2/27/2013
6
Aeroflex Plainview

6 Page



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部品番号部品説明メーカ
ACT4480-DFI

Dual Transceiver

Aeroflex Circuit Technology
Aeroflex Circuit Technology


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