This is a document about the data sheet of 54LS93 / 74LS93. The document describes the features and characteristics of these two products, including their recommended operating conditions, input and output levels, and counting frequency.
The 54LS93 / 74LS93 is a 4‑bit binary counter built from four master‑slave flip‑flops. It can operate as a divide‑by‑2 counter and, with additional gating, as a divide‑by‑8 counter. The device includes a selectable reset function and allows the B input to be tied to Q for maximum counting length.
The data sheet lists typical parameters such as a 32 MHz clock frequency, supply voltage range of 4.5 V to 5.5 V, and operating temperature from 0 °C to 75 °C. Electrical characteristics for output high/low currents, input thresholds, and timing specifications are also provided. This manual is written in Chinese.
| Output High Current (I_OH) | -400 µA |
|---|---|
| Output Low Current (I_OL) | 4 mA |
| Typical Clock Frequency | 32 MHz |
It is a four‑bit binary counter.
The typical clock frequency is 32 MHz.