The IDT54/74FCT521/A/B/C is a fast CMOS 8-bit identity comparator released by IDT, with 1mW typical static power consumption, TTL input and output level compatibility, CMOS output level compatibility
This document is a datasheet for the IDT54/74FCT521, IDT54/74FCT521A, IDT54/74FCT521B, and IDT54/74FCT521C devices. These are 8-bit identity comparators built using advanced dual metal CMOS technology that compare two 8-bit words and provide a LOW output when the words match bit for bit. The devices are available in commercial and military temperature ranges with various speed grades (FAST, Very Fast, Super Fast).
The datasheet provides detailed information including functional block diagrams, pin configurations, absolute maximum ratings, DC electrical characteristics, power supply characteristics, switching characteristics, test circuits, and ordering information. It specifies performance metrics such as propagation delay, input/output voltage levels, and capacitance values for both commercial and military variants.
| Device Type | 8-bit identity comparator |
|---|---|
| Technology | advanced dual metal CMOS |
| Operating Temperature (Commercial) | 0 to +70 °C |
| Operating Temperature (Military) | -55 to +125 °C |
| Output Short Circuit Current (Commercial) | 48mA |
| Output Short Circuit Current (Military) | 32mA |
| Static Power Consumption | 1mW typ. |
| Input Current (Max) | 5A |
These devices compare two words of up to eight bits each and provide a LOW output when the two words match bit for bit.
Yes, the device features TTL input and output level compatibility.