Datasheet ACT4489-I, ACT4489-FI, ACT4489-F, ACT4489 Datasheet (ACT)

Page 1
www.aeroflex.com/act1.htm
ACT 4489 SINGLE TRANSCEIVER
FOR MIL-STD-1553/1760
Features
• +5 / ±12 Volt Supply Operation
• Low Power Dissipation
• Small Size & Light Weight
• 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
CIRCUIT TECHNOLOGY
General Description
The Aeroflex Circuit Technology ACT 4489 is a next generation monolithic transceiver design which provides full compliance to MIL-STD-1553A/B and 1760 requirements in a small package with low power consumption.
The ACT4489 series performs the front-end analog function of inputting and outputting data through a transformer to the MIL-STD-1553 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. Efficient transmitter electrical and thermal design provides low internal power dissipation and heat rise at high as well as low duty cycles.
Transmitter:
TX DATA IN
TX DATA
TX INHIBIT IN
+5V (VL)
+12V (VCC)
-12V (VEE) GND1 GND2 GND3
RX DATA RX DATA IN
CASE
RX STROBE IN
IN
IN
DRIVER
INPUT
AMPLIFIER
ACTIVE FILTER
REFERENCE
ACTIVE FILTER
OUTPUT STAGE
COMP.
COMP.
TX DATA OUT TX DATA
OUT
OUT
RX DATA
RX DATA OUT
Block Diagram (Without Transformer)
The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 ratio transformer, isolated on the data bus side with two 52.5 Ohm fault isolation resistors, and loaded by two 70 Ohm terminations, the data bus signal is typically 7 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
eroflex Circuit Technology – Data Bus Modules For The Future © SCD4489 REV A 1/29/98
Page 2
for the removal of the transmitter
Note overlap
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
Figure 1 — Transmitter Logic Waveforms Idealized
DATA IN
DATA IN
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.
INHIBIT
LINE TO LINE
OUTPUT
Note:
DATA and DATA
and must be in the same state during off times (both high or low).
inputs must be complementary waveforms or 50% duty cycle average, with no delays between them,
Figure 2 — Receiver Logic Waveforms Idealized (ACT4489)
LINE TO LINE INPUT
STROBE
DATA OUT
DATA OUT
Aeroflex Circuit Technology SCD4489 Rev A 1/29/98 Plainview NY (516) 694-6700
2
Page 3
Absolute Maximum Ratings
Operating case temperature -55°C to +125°C Storage case temperature -65°C to +150°C Power supply voltage
CC
V VEE VL
-0.3 V to +18 V +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 V Receiver input voltage (common mode) ±10 V Driver peak output current 300 mA Total package power dissipation over the full operating
2.5 Watts
case temperature rise 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)
P-P
Parameter Condition Symbol Min Typ
"0" Input Current VIN = 0.4 V I "1" Input Current V
= 2.7 V I
IN
"0" Input Voltage V "1" Input Voltage V
ILD IHD
IHD IHD
2.0 V
-0.1 -0.2
Inhibit Characteristics
"0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage Delay from TX inhibit, (01) to inhibited output From mid pt Delay from TX inhibit, (10) to active output
Differential output noise, inhibit mode Differential output impedance (inhibited) Note 1
See Figure 5
= 0.4 V I
V
IN
=2.7V I
V
IN
inhibit to ±1.2V pt B, See Figure 5
Point B Point C
ILI
IHI
V
ILI
V
IHI
t
DXOFF
t
DXON
V
NOI
Z
OI
Z
OI
-0.1 -0.2
1.0 40
2.0 175 225
90 150
2K 1K
Ma
x
Unit
mA
1 40 µA
0.7
mA
µA
0.7
V V
nS nS
2 10 mV
Ω Ω
V
P-P
Output Characteristics
Differential output level, See Figure 5 Rise and fall times(10% to 90% at pt A output) See Figure 5 Output offset, Figure 3, 2.5µS after midpoint
crossing of the parity bit of the last word of a 660µS
Point A V Point A
Point A
V
t
OS
O
r
6 7 9
100 160 300 nS
± 90
message See Figure 5
Delay from 50% point of TX DATA or TX DATA
to zero crossing of differential signal. See Fig 5
Aeroflex Circuit Technology SCD4489 Rev A 1/29/98 Plainview NY (516) 694-6700
input
Point A t
3
DXT
100 200
V
mV peak
nS
P-P
Page 4
Electrical Characteristics — Receiver Section
Parameter Condition Symbol Min Typ Max Unit
Differential Receiver Input Voltage Range (See Figure 5, Point B)
TXFMR
1:1
V
Common Mode Rejection Ratio (Note 3) CMRR "1" State – Rx Data or Rx Data
"0" State – Rx Data or Rx Data
Output IOH = -0.4 mA Output IOI = 4 mA
V V
Delay (average) from Differential Input Zero Crossings to RX DATA and RX DATA
Output
t
50% points
Input Threshold Voltage (referred to the bus)
100KHz–1MHz
V
Strobe Characteristics (Logic "0" Inhibits Output)
"0" Input Current VS=0.4V "1" Input Current V "0" Input Voltage "1" Input Voltage V Strobe Delay (Turn-on or Turn-off)
=2.7V
S
IDR
OH
OL
DXT
TH
I
IL
I
IH
V
t
SD
40
V
P-P
45 dB
2.5 3.7 V
0.35
0.5
V
270 400 nS
0.60
0.75
-0.1
IL
IH
2.0 50 100
1.20 V
-0.2
1 +40
0.7
P-P
mA
µA
V V
nS
Power Data
Power Supply Currents – Per Channel – See Figure 4
I
CC
I
I I
I I
I I
EE
I
L CC EE
I
L CC EE
I
L CC EE
I
L
Transmitter Standby
25% duty cycle
50% duty cycle
100% duty cycle
Power Supply Voltages
V
±12V Operating Power Supply Voltage Range +5V
Operating Power Supply Voltage Range) V
CC
VEE
Note 1. Power on or off, measured from 75KHz to 1MHz at point A and transformer self impedance of 3Kminimum
at 1MHz.
Note 2. Power Supplies: ±12 Volts ±0.60 V & +5 Volts ±0.5 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
at point A = 7 V
BUS
P-P
+11.40
-11.40
L +4.50 +5.00 +5.50
0
12 18
58 12 18
115
12 18
230
12 18
+12.00
-12.00
1
16 30
63 20
30
125
20 30
250
20 30
+12.60
-12.60
mA
V
V
Aeroflex Circuit Technology SCD4489 Rev A 1/29/98 Plainview NY (516) 694-6700
4
Page 5
Figure 3 – Transmitter (TX) Output Offset
POWER DISSIPATION
MILLIWATTS
Figure 5 – Typical 1553 Bus Connections
LAST BIT
Magnified View
0 Volts
2.5 µsec
OUTPUT OFFSET*
OUTPUT OFFSET
*
*Offset measured at point A in Figure 5
Figure 4 – Hybrid Power Dissipation vs. Duty Cycle
3600
0.270
3200 2800 2400 2000 1600 1200 800 400 0
Typical Hybrid Input Power
Typical Hybrid
Dissipation
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE – PERCENT
3.0W
1.9W
Transformer Coupled Stub
ACT 4489
TX DATA OUT
TX DATA
OUT
RX DATA IN RX DATA
IN
1 : 0.707
3
7
2
1
5
T1553-1
1 : 1.4
C
Zoi
VCM
Direct Coupled Stub
ACT 4489
TX DATA OUT
TX DATA
OUT
RX DATA IN RX DATA
IN
Transformer Model use Technitrol Part# 1553-1
or equivalent
1 : 1
3 2
1
T1553-1
8
4
52.5
B
52.5
Zoi
52.5
52.5
70
A
A
70
Note: Vcc= +12V, VEE = -12V, VL= +5V, Transformer ratio 1:1,
(point A) at 7VP-P.
V
BUS
Configurations and Ordering Information
ACT Model # / Ordering Part #
ACT 4489 Plug In TBA Normally Low ACT 4489-I Plug In TBA Normally High ACT 4489-F Flat Package TBA Normally Low ACT 4489-FI Flat Package TBA Normally High
Specifications subject to change without notice.
Aeroflex Circuit Technology SCD4489 Rev A 1/29/98 Plainview NY (516) 694-6700
Case Style
5
DESC
Number
Rx Standby
Page 6
Figure 6 – Lead Numbers & Functions
ACT4489
Pin # Function
1 TX DATA OUT 2 TX DATA 3 GROUND 4 NC 5 NC 6 NC 7 RX DATA OUT 8 STROBE 9 GROUND
OUT
10 RX DATA
OUT 11 NC 12 NC 13 V
CC
14 NC 15 RX DATA IN 16 RX DATA
IN 17 NC 18 CASE 19 V
EE
20 +5 V 21 TX INHIBIT 22 TX DATA IN 23 TX DATA
IN
24 NC
Aeroflex Circuit Technology SCD4489 Rev A 1/29/98 Plainview NY (516) 694-6700
6
Page 7
CIRCUIT TECHNOLOGY
Plug In Package Outline
1.385 MAX.
1324
Pin 1 & ESD
Designator
.240
MIN.
.100
12
.015
.018
1.100
(11 Equal Spaces at .100)
Flat Package Outline
1.315 MAX. .015
1324
0.805 MAX.
0.200 MAX.
.200
MAX.
.065
0.600
0.735
.375
MIN.
MAX.
.100
12
.010
1.100
(11 Equal Spaces at .100)
Telephone: (516) 694-6700
FAX: (516) 694-6715
Toll Free Inquiries: (800) THE-1553
E-Mail: sales-act@aeroflex.com
7
Lead 1 & ESD
Designator
Aeroflex Circuit Technology 35 South Service Road Plainview New York 11830 www.aeroflex.com/act1.htm
Aeroflex Circuit Technology SCD4489 Rev A 1/29/98 Plainview NY (516) 694-6700
Loading...