4028 is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. 4028 is a BCD to DECIMAL or BINARY to OCTAL decoder consisting of buffering on all 4 inputs, decoding logic gates, and 10 output buffers. A BCD code applied to the four inputs, A to D, results in a high level at the selected one of 10 decimal decoded outputs. Similarly, a 3-bit binary code applied to inputs A through C is decoded in octal code at output 0 to 7 if D = “0”. High drive capability is provided at all outputs to enhance dc and dynamic performance in high fan-out applications.
Features
- BCD-to-decimal decoding or binary-to-octal decoding
- High decoded output drive capability
- ?Positive logic? inputs and outputs??decoded outputs go high on selection
- Medium-speed operation? tPHL, tPLH?= 80 ns (typ.) @ VDD?= 10 V
- Standardized, symmetrical output characteristics
- 100% tested for quiescent current at 20 V
- Maximum input current of 1 ?A at 18 V over full package-temperature range; 100 nA at 18 V and 25?C
- Noise margin (full package-temperature range) =
1 V at VDD?= 5 V
2 V at VDD?= 10 V
2.5 V at VDD?= 15 V - 5-V, 10-V, and 15-V parametric ratings
- Meets all requirements of JEDEC Tentative Standard No. 13B, ?Standard Specifications for Description of ?B? Series CMOS Devices?
- Applications:
- Code conversion
- Indicator-tube decoder
- Address decoding-memory selection control
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