The Aeroflex / Tektronix / CDS 53A-414 BCD OUT Card is a specialized interface card that converts and transmits digital data in Binary-Coded Decimal (BCD) format from instruments into ASCII for integration with larger test and measurement systems. Accepting up to 10 BCD digits (40 bits) in 8421 BCD code, this card enables numerical data transmission for display, processing, and logging within CDS 53/63 Series card cage systems.
Technical Specifications
• Data Capacity: 10 BCD digits (40 bits)
• Data Format: 8421 BCD code
• Logic Level: TTL, switch-selectable for high or low true logic
• Data Latching: Less than 1 µs for all 40 bits from instrument to card
• Data Throughput: Up to 7,000 ten-digit transfers per second (limited by instrument, communications card, and system controller)
• Data Accept Line (Output): High or low true TTL, switch-selectable; transition ~2.8 µs after acceptance; 10 TTL load fan-out; 25 ns maximum rise/fall time
• Data Ready Line (Input): High true, low true, or ignored (switch-selectable); one TTL load; 30 ns minimum pulse width; 5 µs maximum rise time
• Programming: ASCII characters
• Power Supply: 4.75 V DC to 5.25 V DC; 0.80 A maximum quiescent, 0.85 A peak
• Operating Temperature: −10°C to +65°C (55°C ambient, <10°C rise with adequate airflow)
• Storage Temperature: −40°C to +85°C
• Humidity: <95% RH non-condensing (−10°C to +30°C); <75% RH non-condensing (+31°C to +40°C); <45% RH non-condensing (+41°C to +55°C)
• Dimensions: 197 mm H × 220 mm D × 13 mm W (card); 254 mm × 254 mm × 127 mm (shipping)
• Weight: 0.23 kg
– Key Features
• 40-bit TTL data input from contact closures or instrument outputs
• Configurable pull-up resistor operation (4.0 mA or 1.6 mA sink current per line)
• BCD-to-ASCII translation with MSD-first transmission
• CR/LF termination for output data
• Fan-cooled operation via card cage
• TTL-compatible data handshaking with programmable control lines
– Typical Applications
• Integration of BCD output instruments into automated test systems
• Real-time numerical data acquisition and logging
• Legacy instrument interface modernization within 53/63 Series environments
– Compatibility & Integration
Designed for CDS 53/63 Series instrumentation card cages. Data output connects to system controllers via BCD-to-ASCII translation. Compatible with TTL-level data sources and programmable via ASCII characters.
