LS7366R-S

The LS7366R-S from LSI Corporation is a versatile 32-bit CMOS counter with direct interface capabilities for incremental encoders. It supports various counting modes, including quadrature counting (x1, x2, x4) and non-quadrature up/down counting. The device features programmable modes for Modulo-N, Non-recycle, Range-limit, or Free-running operations.

For communication with microprocessors and microcontrollers, the LS7366R-S utilizes a standard 4-wire SPI/MICROWIRE serial interface (MOSI, MISO, SS/, SCK). Data transfer is synchronous, initiated by a high-to-low transition on the SS/ input. The counter can be configured for 8-bit, 16-bit, 24-bit, and 32-bit data transfers.

This counter operates within a voltage range of 3V to 5.5V. At 5V, it achieves a count frequency of 40MHz, and at 3V, it reaches 20MHz. It is housed in a 14-SOIC package suitable for surface mounting and operates within an ambient temperature range of -25°C to 85°C.

The LS7366R-S includes features like latched interrupt outputs for Carry, Borrow, Compare, or Index events, and index-driven counter load, output register load, or counter reset functions. Its internal quadrature clock decoder and filter enhance its performance in encoder applications.