This datasheet provides the characteristics of SN54HC573A/SN74HC573A transparent D-type latches. This device has 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
The SN54HC573A and SN74HC573A are octal transparent D‑type latches with 3‑state outputs, intended for buffer registers, I/O ports, bidirectional bus drivers, and working registers. They feature high‑current 3‑state outputs that can drive up to +6 mA at 5 V and operate over a wide supply range.
The datasheet includes detailed ordering information, electrical and timing specifications, package options, mechanical drawings, and important warranty and usage notices. It also lists recommended operating conditions and provides typical performance parameters such as propagation delay and output drive capabilities.
| Supply voltage range | 2 V to 6 V |
|---|---|
| Typical propagation delay | 21 ns |
| Output drive current (5 V) | +6 mA |
OE should be tied to Vcc through a pull‑up resistor; the minimum value is determined by the driver’s current‑sinking capability.
The typical propagation delay (tpg) is 21 ns.