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ACT4469D Dual Variable Amplitude Transceivers
for H009
Features
* World's smallest and lowest standby power dual variable amplitude H009 transceiver 1.25" x 0.61" maximum ceramic package * Dual transceiver with variable output amplitude control meets McDonnell Douglas H009 data bus specifications * Lowest standby power * Low power dissipation at full output power * Operates with 12V to 15 and +5V power supplies * Voltage source output for transmitter * Monolithic construction * Processed to commercial or screened to MIL-STD-883 specs * +10V Control line for transmitter amplitude adjustment (See Figure 3) * Packaging - Hermetic Ceramic
Non-conductive mounting surface No package glass beads Small size & light weight

CIRCUIT TECHNOLOGY
www.aeroflex.com
General Description
The Aeroflex Circuit Technology model ACT4469D is a next generation monolithic transceiver which provides variable amplitude in compliance with H009 data bus requirements with the lowest standby power consumption available using three DC power supplies operation. The dual channel model ACT4469D performs the front-end analog function of inputting and outputting data through a transformer to a H009 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. The ACT4469D series 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. Variable amplitude is adjusted with factory preset 0-10Vdc control line at 2 mA maximum input current at 10 Volts.
CHANNEL B TX/RX TX/RX
VCONT
TX DATA IN TX DATA IN
DRIVER
TRANSMIT ACTIVE FILTER
VARIABLE AMPLITUDE OUTPUT STAGE
TX INHIBIT +5 V +VCC -VEE Channel A GROUND Channel B INPUT AMP RECEIVE ACTIVE FILTER RX DATA OUT Channel A REFERENCE COMP. RX DATA OUT
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 fault isolation resistors, and loaded by a 175 ohm termination, the data bus signal produced is 20 Volts nominal P-P at
COMP.
STROBE
Block Diagram (without Transformer, Channel A shown)
eroflex Circuit Technology - Data Bus Modules For The Future (c) SCD4469D REV A 5/21/01
A-A' (See Figure 5). When both DATA and DATA inputs are held low or high, the transmitter output impedance is low, and signal is "removed" from the line. In addition, an overriding "INHIBIT" input returns the output impedance to a high 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 1). The transmitter utilizes an active filter to suppress harmonics above 1MHz to meet H009 specification. The transmitter may be safely operated for an indefinite period with the output 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 Receiver Logic Waveforms, Figure 2). The internal threshold is nominally set to detect data bus signals exceeding 1.0 Volts P-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. The strobe is internally pulled up, therefore a pull resistor is not needed.
Figure 1A - Tx Output Truth Table
DATA X H L H L DATA X H L L H INHIBIT H L L L L OUTPUT High Z Low Z (No signal)
Low Z (Signal)
Figure 1B - Transmitter Logic Waveforms
Region
DATA IN
1
2
3
4
1
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, and in the same state during the off time (both high and low). 2. Region 1; no output signal, High Z state, (Receive Mode), Region 2; No Output signal, Low Z state, Region 3; Transmitter signal on, low Z (Transmitter mode), Region 4; No Output signal, Low Z state, (Terminate Mode).
Figure 2 - Receiver Logic Waveforms
LINE TO LINE INPUT
Rx DATA OUT
Note overlap
Rx DATA OUT
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2
SCD4469D REV A 5/21/01 Plainview NY (516) 694-6700
Absolute Maximum Ratings, Per Channel
Operating Case Temperature Storage Case Temperature Power Supply Voltages Logic Input Voltage Receiver Differential Input Receiver Input Voltage (Common Mode) Driver Peak Output Current Total Package Power Dissipation over the Full Operating Case Temperature Range Maximum Junction to Case Temperature Junction-Case, Thermal Resistance 16 V -0.3 V to +5.5 V 40 V 10V 150 mA 3.6 Watts 18C 5C/W -55C to +125C -65C to +150C +7 V
Electrical Characteristics - Driver Section 1/ 2/
Input Characteristics, TX DATA IN or TX DATA IN Parameter
"0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage
Condition
VIN = 0.4 V VIN = 2.7 V -
Symbol
IILD IIHD VILD VIHD
Min
2.0
Typ
-0.2 1 -
Max
-0.4 40 0.7 -
Unit
mA A V V
Inhibit Characteristics
"0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage Delay from TX inhibit,(01) to inhibited output Delay from TX inhibit, (10) to active output Differential Output Noise, inhibit mode VIN = 0.4V VIN = 2.7V IILI IIHI VILI VIHI tDXOFF tDXON VNOI 2 -0.2 1.0 300 200 2 -0.4 40 0.7 500 400 10 mA A V V nS nS mVp-p
Output Characteristics
Differential output level (175) Rise and Fall times Output Offset Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal Control Line Input Resistance 3/
Aeroflex Circuit Technology
Pt. A - A' Pt. A - A' 3
VO tR & tF VOS tDTX RCONT
16 200 5
20 260 280 -
24 300 260 400 -
V p-p nS mV peak nS K
SCD4469D REV A 5/21/01 Plainview NY (516) 694-6700
Electrical Characteristics - Receiver Section
Parameter
Differential Voltage Range 3/ Common Mode Rejection Ratio 3/
1/ 2/
Condition
Pt. A - A' -
Symbol
VIDR CMRR
Min
45
Typ
Max
20
Unit
V peak dB
-
-
Strobe Characteristics (Logic "0" inhibits output) (NOTE: If not used, a 1K pullup to 5V is recommended)
"0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage Strobe Delay (turn-on) Strobe Delay (turn-off) VS = 0.4 V VS = 2.7V IIL IIH VIL VIH tSD(ON) tSD(OFF) 2.0 -0.2 1 90 90 -0.4 +40 0.7 150 150 mA A V V nS nS
Threshold Characteristics (Sinewave input )
Input Threshold Voltage, Pt. A - A' Figure 5 1MHz VTH 1.5 2.0 3.0 Vp-p
Output Characteristics, RX DATA and RX DATA
"1" State "0" State Delay (average), from differential input zero crossings to RX DATA and RX DATA output 50% points IOH = -0.4 mA IOL = 4 mA 6/ VOH VOL tDRX 2.5 3.6 0.35 300 0.5 450 V V nS
Power Supply Currents Per Channel
VCC = +12V to +15V, VEE = -12V to -15V, VL = +5V
1/ 2/
Duty Cycle
Transmitter Standby
Condition
Pt. A - A' ZO = 175 , VO = 21 VPK-PK Figure 5
Symbol
ICC IEE IL ICC IEE IL ICC IEE IL ICC IEE IL
Typ
6 16 19 26 35 19 45 54 19 84 92 20
Max
10 25 25 35 45 25 55 65 25 120 130 25
Unit
25% 3/
mA
50%
100%
Notes: 1. VCC = +15Volts 0.75V, VEE = -15Volts 0.75V, VIL = +5Volts 0.5V, Tc = -55C to +125C, unless otherwise specified. 2. All typical values are measured at +25C. 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, 2.5 S after midpoint crossing of the parity bit of the last word. 6. This test is peformed while the Transceiver is reading its own transmission. This condition is called "Wraparound". Standard TTL loads applied to RX DATA Outputs.
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SCD4469D REV A 5/21/01 Plainview NY (516) 694-6700
Figure 3 - Typical Transmitter Output Amplitude (Vo) vs Vcont Voltage
VO PK-PK @ A- A' 21 FS
Figure 4 - Transmitter (TX) Output Offset
LAST BIT
16.8 OUTPUT AMPLITUDE
Slope = VO / VCONT @175
0.8FS
Magnified View
OUTPUT OFFSET*
12.6
0.6FS
OUTPUT OFFSET*
8.4
0.4FS
2.5 sec
4.2
0.2FS
*Offset measured at point A-A' in Figure 5
0 0 VCONT dc 2 4 6 8 10 CONTROL VOLTAGE
Figure 5 - Typical Transformer connection
Figure 6 - Power Dissipation vs. Duty Cycle (Total hybrid with one channel transmitting and the other in standby)
3.6
TX/RX DATA OUT
+
*
CB
34 N1:N2 A 175
POWER DISSIPATION MILLIWATTS
3.2 2.8 2.4 2.0 1.6 Typical 1.2 .8 .4 0 0 10 20 30 40 50 60 70 80 90 100 Maximum
TX/RX DATA OUT
+
* B'
C
A' 34 Use Aeroflex 25T1553-1 Transformer turns ratio: N1:N2 = 1:1
ACT4469D, CH A
* External Coupling Capacitors are required for each output. Recommened 1F ceramic 25V/50V or can use Tantalum (15WVDC min) with 0.1F ceramic in parallel for each output.
DUTY CYCLE - PERCENT
Note: Vcc = 15V Volts, V bus (Pt. A-A') at 21 Volts P-P
Configurations and Ordering Information
Model No.
ACT4469D ACT4469DI
Receiver Data level
Normally Low Normally High
Case
DIP
Specs.
H009
Configuration
Dual
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SCD4469D REV A 5/21/01 Plainview NY (516) 694-6700
CIRCUIT TECHNOLOGY
Package Dimensions
24 13
12 Pin# 1 & ESD Designator
.200 MAX
1.270 MAX
.620 MAX
.030 .010 .019 .015 .050 TYP
.150 MIN
All dimensions in inches
.610 .590
.012 .008
Pin Outs
ACT4469D
Pin # 1 2 3 4 5 6 7 8 9 10 11 12
Specifications subject to change without notice.
Function TX DATA OUT A / RX DATA IN A TX DATA OUT A / RX DATA IN A GROUND STROBE A RX DATA OUT A RX DATA OUT A 10V CONTROL IN TX DATA OUT B / RX DATA IN B TX DATA OUT B / RX DATA IN B STROBE B RX DATA OUT B RX DATA OUT B
Pin # 13 14 15 16 17 18 19 20 21 22 23 24
Function +5V B -15V B +15V B INHIBIT B TX DATA IN B TX DATA IN B +5V A -15V A +15V A INHIBIT A TX DATA IN A TX DATA IN A
Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803
Aeroflex Circuit Technology
Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: 1-(800)THE-1553
6
SCD4469D REV A 5/21/01 Plainview NY (516) 694-6700

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