74HC93N,112

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The 74HC93N,112 is a high-speed 4-bit binary counter featuring individual clock (nCP0..3) and reset (nRST) inputs. It is designed to be used in digital systems that require high frequency counting capability, such as frequency measurement and sample-and-hold circuits. To provide minimum propagation delays, these circuits are constructed primarily of Schottky transistors.

Part of the HC logic family, this unique integrated circuit has a wide range of application fields and has the advantage of cost-effectiveness. These include system reset or clocking, measurements and sampling, frequency divider, and memory synchronization.

In the 74HC93N,112, all the flip-flops that are connected in cascade will divide the incoming clock frequency by two. Consequently, the overall output frequency of the circuit will be a certain fourth of the incoming clock frequency. It provides access to the freq/2 output at a higher frequency and by this, it avoids the need for an SN74155, a 4-bit cascadable counter. It has different modes of operations that have been designed with its clear (nCLR) and reset (nRST) logic inputs.

The 74HC93N,112 has the ability to work in burst mode through its nMR (Master Reset) input. In this mode, the counter is reset when the low-to-high transition of the nMR signal is detected. In addition, it has synchronous loading options; the nSLD input loaded the data that is logically ORed with the nSLDT signal during the rising edge of the nCP0.

The working principle of the IC is simple and straightforward. The signal at the nCP0 input is used as the clock or timing source to the IC, which increments the counter modulus on each clock pulse. The modulus is the total number of states that can count before going back to the original state. In other words, the maximum number of incrementing steps of this scheme is 2n, where n is the number of output stages of the counter. If the clear input (nCLR) is in logic “high”, then the counter is reset.

The IC is powered with power supply voltage, VDD, ranging from 2.4V to 6V. It has wide-bandwidth Schottky transistors and Schottky diodes that allow it to operate at very high frequency with very low power and low-voltage supply. Its package type is SOP-16, thereby giving it more surface mounting availability and convenience. In addition, it has an operating temperature range of -55°C to 125°C and an operating frequency of 125 MHz.

To sum up, the 74HC93N,112 is a cost-effective, high-frequency counter IC spreading across numerous application fields such as frequency generation and measurement, system activating, and synchronization. Its superior design and performance offer much needed flexibility, while its power efficiency, wide temperature range, and harmonious package type make it the perfect choice for a variety of applications.

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