Document
CT1999 Remote Terminal and/or Bus Controller
for MIL-STD-1553B
Features
• Performs the Complete Dual-Redundant Remote Terminal and Bus Controller Protocol Functions of MIL-STD-1553B • Automatic Switchover to Superseding Input Commands • MIL-PRF-38534 Compliant Circuits Available • 750 mw Typical Power Consumption • Small Size • Available in Plug-in or Flatpack Configuration CIRCUIT TECHNOLOGY • Compatible with all ACT Driver/Receiver Units www.aeroflex.com • 5V DC Operation • Direct replacement for CT1602 • Full Military (-55°C to +125°C) Temperature Range
General Description
The CT1999 design incorporates ASIC and five Octal Buffers that accomplish the dual redundant MIL-STD1553B Remote Terminal and/or Bus Controller Protocol Functions. Buffering has been added to the most commonly used output signals on the CT1999, minimizing external hardware requirements. The CT1999 connects directly to all ACT Driver/Receiver Units. Block Diagram (With Transformer)
Encoder
Interface Unit
SA & WC Buffers
Sub Address & Word Count Outputs
Internal Highway Buffer BUS "0" T/R Hybrid Driver Select & Enable T/R Hybrid Decoder "1" Internal Highway Control Decoder "O" Discrete Output Buffers
Control Data I/O
Buffered Descrete Outputs
Unbuffered Outputs
BUS "1"
Control Inputs Terminal Address Inputs ASIC CT1999
eroflex Circuit Technology – Data Bus Modules For The Future SCDCT1999 REV B 8/14/01
Absolute Maximum Ratings
Parameter
Operating Free-air Temperature Storage Case Temperature Power Supply Voltage VCC Input Voltage
Range
-55°C to +125 -65°C to +150 +7 +7
Units
°C °C Volts Volts
Recommended Operating Conditions
Parameter
VCC Power Supply Voltage VCC VIH High Level Input Voltage, Vcc = 5V VIL Low Level Input Voltage, Vcc = 5V
Min
4.5 2.2
Typ
5.0
Max
5.5
Unit
V V
0.7
V
Electrical Characteristics
(TA = -55°C to +125°C)
Parameter
VOH High Level Output Voltage
Test Conditions
IOH = -3mA IOH = -400µA IOH = -800µA VCC = 4.5V
Min
2.4 2.4 2.4
Max
Unit
V V V
Notes
2B,5 6 7 2B,5 6 7
VOL Low Level Output Voltage
IOL = +12mA IOL = +4mA IOL = +2mA VCC = 4.5V
0.4 0.4 0.4
V V V
IIH High Level Input Current
VCC = 5.5V, VIH = 2.4V
-700 -20 -700 -400
-200 20 -200 -25 -350 0 -350 -25 285
µA µA µA µA µA µA µA µA mA
1 2A,2B 3 4 1 2A,2B 3 4
IIL Low Level Input Current
VCC = 5.5V, VIL = 0.4V
-900 -200 -900 -500
ICC Supply Current
VCC = 5.5V
Notes (Pin numbers are for 90 pin Plug in package): 1. Pins 45 through 50 (RTADPAR,RTAD0,1,2,3,4). 2A. Pin 34 (IHDIR). 2B. Pins 37 through 44 (IH08 through IH715). 3. Pins 24,36 (BUFINH, IHENA). 4. ALL remaining inputs ALL versions. 5. Pins 2 through 23 (Remaining Buffered Outputs). 6. Pins 68,69,70,71 (TXINH0,TXINH1,TXDATA,TXDATA). 7. All remaining outputs. Clock Requirements Frequency Stability (-55°C to +125°C) Maximum Asymmetry Rise/Fall Time
Aeroflex Circuit Technology
6MHz ±0.01% 48 - 52% 10ns MAX
2
SCDCT1999 REV B 8/14/01 Plainview NY (516) 694-6700
REMOTE TERMINAL OPERATION
Receive Data Operati.