ACT4423 AEROFLEX | Alldatasheet
Document overview
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Technical content
Features
- +5 / +12 Volt Power Supply Operation
- Eliminates Negative Power Supply
- Low Power Dissipation
- Small Size & Light Weight
- Dual Transceivers Saves Space & Cost
- Outstanding MIL-STD-1553 performance
- Radiation Hard Dielectric Isolation Monolithic Construction for Severe Environments
- 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
- DESC SMD (Standard Military Drawing) Pending FOR MIL-STD-1553/1760 ACT4423 DUAL TRANSCEIVER
Aeroflex Circuit Technology SCD4423 REV B 6/3/99 Plainview NY (516) 694-67002 typically 7.5 Volts P-P at point A (See Figure5). 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” 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 represent positive 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
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. DATA IN DATA IN INHIBIT LINE TO LINE OUTPUT Note: DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them, and must be in the same state during off times (both high or low). Figure 1 — Transmitter Logic Waveforms Idealized Figure 2 — Receiver Logic Waveforms Idealized (ACT4423) Note overlap LINE TO LINE INPUT DATA OUT DATA OUT STROBE
Aeroflex Circuit Technology SCD4423 REV B 6/3/99 Plainview NY (516) 694-67003 Absolute Maximum Ratings Operating case temperature -55°C to +125°C Storage case temperature -65°C to +150°C Power supply voltage VCC VL -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 VP-P Receiver input voltage (common mode) ±10 V Driver peak output current 300 mA Total package power dissipation over the full operating case temperature rise
2.5 Watts
(Note: Normal operation conditions require one transceiver on and the other off) 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 IILD -0.1 -0.2 mA "1" Input Current VIN = 2.7 V IIHD 1 40 µA "0" Input Voltage VIHD 0.7 V "1" Input Voltage VIHD 2.0 V Inhibit Characteristics "0" Input Current VIN = 0.4 V IILI -0.1 -0.2 mA "1" Input Current VIN=2.7V IIHI 1.0 40 µA "0" Input Voltage VILI 0.7 V "1" Input Voltage VIHI 2.0 V Delay from TX inhibit, (0 Õ1) to inhibited output From mid pt inhibit to ±1.2V pt B, See Figure 5 t DXOFF 175 225 nS Delay from TX inhibit, (1 Õ0) to active output tDXON 90 150 nS Differential output noise, inhibit mode VNOI 2 10 mVP-P Differential output impedance (inhibited) Note 1 See Figure 5 Point B ZOI 2K Ω Point C ZOI 1K Ω Output Characteristics Differential output level, See Figure 5 See Figure 5 Point A VO 6 7.5 9 VP-P Rise and fall times(10% to 90% at pt A output) See Figure 5 Point A tr 100 160 300 nS Output offset, Figure 3, 2.5µS after midpoint crossing of the parity bit of the last word of a 660µS message See Figure 5 Point A VOS ± 90 mV peak Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal. See Fig 5 Point A tDXT 100 200 nS
Aeroflex Circuit Technology SCD4423 REV B 6/3/99 Plainview NY (516) 694-67004 Electrical Characteristics — Receiver Section Parameter Condition Symbol Min Typ Max Unit Differential Receiver Input Voltage Range (See Figure 5, Point B) TXFMR 1:1 VIDR 40 VP-P Common Mode Rejection Ratio (Note 3) CMRR 45 dB "1" State – Rx Data or Rx Data Output IOH = -0.4 mA VOH 2.5 3.7 V "0" State – Rx Data or Rx Data Output IOI = 4 mA VOL 0.35 0.5 V Delay (average) from Differential Input Zero Crossings to RX DATA and RX DATA Output 50% points tDXT 270 400 nS Input Threshold Voltage (referred to the bus) 100KHz–1MHz VTH 0.60 0.75 1.20 VP-P Strobe Characteristics (Logic "0" Inhibits Output) "0" Input Current VS=0.4V IIL -0.1 -0.2 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 50 100 nS Power Data Power Supply Currents – Per Channel – See Figure 4 Transmitter Standby ICC IL mA 25% duty cycle ICC IL 50% duty cycle ICC IL 120 130 100% duty cycle ICC IL 210 230 Power Supply Voltages +12V Operating Power Supply Voltage Range VCC +14.25 +15.00 +15.75 V +5V Operating Power Supply Voltage Range) VL +4.75 +5.00 +5.25 V Note 1. Power on or off, measured from 75KHz to 1MHz at point A and transformer self impedance of 3K Ω minimum at 1MHz. Note 2: Power Supplies: +12 Volts ±0.75 V & +5 Volts ±0.25 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 BUS at point A = 7.5 VP-P
Aeroflex Circuit Technology SCD4423 REV B 6/3/99 Plainview NY (516) 694-67005 Configurations and Ordering Information ACT Model # / Ordering Part # Case Style DESC Number Rx Standby ACT4423-D DIP Pending Normally Low ACT4423-DI DIP Pending Normally High ACT4423-DF FP Pending Normally Low ACT4423-DFI FP Pending Normally High Figure 3 – Transmitter (TX) Output Offset Figure 4 – Hybrid Power Dissipation vs. Duty Cycle 0 10 20 30 40 50 60 70 80 90 100 3200 2800 2400 2000 1600 1200 800 400 DUTY CYCLE – PERCENT POWER DISSIPATION MILLIWATTS OUTPUT OFFSET * OUTPUT OFFSET * LAST BIT 2.5 µsec *Offset measured at point A in Figure 5
0 Volts
(Total hybrid with one channel transmitting and the other not powered – 100% Duty Cycle) Note: Vcc= +12V, VL= +5V, Transformer ratio 1:1, VBUS (point A) at 7.5VP-P. Figure 5 – Typical 1553 Bus Connections 1:1TX DATA OUT TX DATA OUT RX DATA IN RX DATA IN 70Ω 70Ω 52.5Ω Transformer Model use Technitrol Part# 1553-1 52.5Ω 1.4:1TX DATA OUT TX DATA OUT RX DATA IN RX DATA IN 52.5Ω 52.5Ω 1:1.4 Transformer Coupled Stub Direct Coupled Stub C B Zoi VCM Zoi A A T1553-2 T1553-2 ACT4423 ACT4423 0.270 or equivalent 3600 2.97W 1.87W Typical Hybrid Dissipation Typical Hybrid Input Power Specifications subject to change without notice.
Aeroflex Circuit Technology SCD4423 REV B 6/3/99 Plainview NY (516) 694-67006 Figure 6 – Lead Numbers & Functions ACT4423 Pin # Function Channel
1 TX DATA OUT A
2 TX DATA OUT A
3 GROUND 1 A
5 RX DATA OUT A
6 STROBE A
7 GROUND 2 A
8 RX DATA OUT A
9 CASE
10 TX DATA OUT B
11 TX DATA OUT B
12 GROUND 1 B
14 RX DATA OUT B
15 STROBE B
16 GROUND 2 B
17 RX DATA OUT B
19 VCC B
20 RX DATA IN B
21 RX DATA IN B
22 GROUND 3 B
24 +5 V (VL) B
25 INHIBIT B
26 TX DATA IN B
27 TX DATA IN B
28 VCC A
29 RX DATA IN A
30 RX DATA IN A
31 GROUND 3 A
32 NC A
33 +5 V (VL) A
34 INHIBIT A
35 TX DATA IN A
36 TX DATA IN A
Aeroflex Circuit Technology SCD4423 REV B 6/3/99 Plainview NY (516) 694-67007 1.70
1.90 MAX
0.78 MAX .097 36 19 Model ACT4423 Flat Package 0.600 0.085 0.21MAX 0.24 MIN 0.018 DIA. ±0.002
0.10 Typ
0.015 ±0.002
0.78 MAX
0.097 0.086 R
4 Places
0.40 MIN
2 SIDES
0.175 MAX
0.065 REF 0.010 ±0.002 Notes 1. Dimensions shown are in inches 2. Pins are equally spaced at 0.100±0.002 tolerance, non-cumulative, each row Model ACT4423 Dual In Line Designator Pin 1 & ESD Designator Pin 1 & ESD Aeroflex Circuit Technology
35 South Service Road
Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: (800) THE-1553 www.aeroflex.com E-Mail: sales-act@aeroflex.com CIRCUIT TECHNOLOGY