The 'ACT16543 are 16-bit registered transceivers that contain two sets of D-type latches for temporary storage of data flowing in either direction. The 'ACT16543 can be used as two 8-bit transceivers or one 16-bit transceiver. Separate latch enable (
or 
) and output-enable (
or 
) inputs are provided for each register to permit independent control in either direction of data flow.
The A-to-B enable (
) and inputs must be low to enter data from A or to output data to B. Having CEAB low and LEAB low makes the A-to-B latches transparent; a subsequent low-to-high transition at puts the A latches in the storage mode. Data flow from B to A is similar, but requires using the 
, , and inputs.
The 74ACT16543 is packaged in TI's shrink small-outline package, which provides twice the functionality of standard small-outline packages in the same printed-circuit-board area.
The 54ACT16543 is characterized for operation over the full military temperature range of -55°C to 125°C. The 74ACT16543 is characterized for operation from -40°C to 85°C.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
| Supply voltage (min) (V) | 4.5 |
| Supply voltage (max) (V) | 5.5 |
| Number of channels | 16 |
| IOL (max) (mA) | 24 |
| IOH (max) (mA) | -24 |
| Input type | TTL |
| Output type | CMOS |
| Features | Balanced outputs, Positive input clamp diode, Very high speed (tpd 5-10ns) |
| Technology family | ACT |
| Rating | Catalog |
| Operating temperature range (°C) | -40 to 85 |
| SSOP (DL) | 56 | 190.647 mm² 18.42 x 10.35 |
| TSSOP (DGG) | 56 | 113.4 mm² 14 x 8.1 |
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