The DM8131 compares two binary words of two- to-six bits in length and indicates matching (bit-for-bit) of the two words. Inputs for one word are 54/74 series-compatible TTL inputs, whereas those of the second word are high-im- pedance receivers driven by a terminated data bus. These bus inputs include 0.65V typical hysteresis,which provides 1.4V noise immunity.
The DM8131 has active pull- up outputs and goes to the low state upon equality. The device has an output latch which is strobe controlled.
The transfer of information to the output occurs when the STROBE input goes from a logic “1” to a logic "O” state. Inputs may be changed while the STROBE is at the logic “1” level, without affecting the state of the output. These devices are useful as address comparators in computer sys- tems utilizing unified data bus organization.
