HCF4520BM1

The HCF4520BM1 from STMicroelectronics is a monolithic integrated circuit featuring two identical, internal 4-stage binary up counters. Fabricated using Metal Oxide Semiconductor technology, it is available in DIP and SOP packages.

This dual counter consists of D-type flip-flops with interchangeable Clock and Enable lines, allowing for incrementing on either positive-going or negative-going transitions. The counters can be cleared by high levels on their Reset lines. For single-unit operations, the Enable input is maintained High, and the counter advances on each positive-going transition of the Clock. The counters can be cascaded in ripple mode by connecting the Q4 output to the enable input of the subsequent counter while its clock input is held low.

Key electrical characteristics include a supply voltage range of 3 to 20V and a medium speed operation of 6MHz (typical) at 10V. The operating temperature range is -55 to 125°C. Quiescent current is specified up to 600nA at 15V and 25°C. The device is suitable for applications requiring synchronous counting and cascading capabilities.

The HCF4520BM1 is offered in DIP-16 and SO-16 packages. It meets JEDEC JESD13B standards for B Series CMOS devices. Its input and output levels are compatible with other standard CMOS logic series 40xx/561, and at 5V supply, it is also compatible with TTL logic.