Update: 28 September, 2023
The HD74HCT563/HD74HCT573 are octal transparent latches with 3-state outputs. When the latch enable (LE) input is high, the Q outputs of the HD74HCT563 will follow the inversion of the D inputs, while the Q outputs of the HD74HCT573 will follow the D inputs. When the latch enable goes low, data at the D inputs will be retained at the outputs until latch enabled returns high again. When a high logic level is applied to the output control input, all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements.
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MD5 Checksum: 58CBBD87597E95AA96B5D817627DCCB9
Publication date: 05 June, 2012
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PDF Link: HITACHI HD74HCT563/HD74HCT573 Octal Transparent Latches (with 3-state outputs) handbook PDF