The 'BCT543 octal transceiver contains two sets of D-type latches for temporary storage of data flowing in either direction. Separate latch-enable (LEAB or LEBA) and output-enable (OEAB or OEBA) inputs are provided for each register to permit independent control in either direction of data flow.
The A-to-B enable (CEAB) input must be low in order to enter data from A or to output data from B. If CEAB is low and LEAB is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB puts the A latches in the storage mode. With CEAB and OEAB both low, the 3-state B outputs are active and reflect the data present at the output of the A latches. Data flow from B to A is similar but requires using the CEBA, LEBA, and OEBA inputs.
The SN54BCT543 is characterized for operation over the full military temperature range of x9655°C to 125°C. The SN74BCT543 is characterized for operation from 0°C to 70°C.
| Supply voltage (min) (V) | 4.5 |
| Supply voltage (max) (V) | 5.5 |
| Number of channels | 8 |
| IOL (max) (mA) | 48 |
| IOH (max) (mA) | -12 |
| Input type | TTL |
| Output type | TTL |
| Features | Very high speed (tpd 5-10ns) |
| Technology family | BCT |
| Rating | Military |
| Operating temperature range (°C) | -55 to 125 |
| CDIP (JT) | 24 | 221.44 mm² 32 x 6.92 |
| LCCC (FK) | 28 | 130.6449 mm² 11.43 x 11.43 |
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