LS7166B-S

Counter Dividers Overview

The LS7166B-S is a CMOS, 24-bit programmable quadrature counter manufactured by LSI Computer Systems. It supports multiple count modes including non-quadrature, up/down, binary, BCD, 24-hour clock, mod-N, and single cycle. The device features an 8-bit bidirectional data bus for microcontroller interface, a readable status register, and discrete outputs for carry, borrow, and compare functions. Operating voltage ranges from 3V to 5.5V with a maximum count frequency of 40MHz in non-quadrature mode. The -S suffix indicates the SOIC package type.

Counter Dividers Feature Summary

• Supports multiple programmable counting modes including quadrature X1/X2/X4, binary, BCD, and 24-hour clock configurations.
• Features a 24-bit preset register and comparator for precise count control and division applications.
• Provides flexible hardware control via programmable inputs for dynamic enable, reset, and load operations.
• Includes dedicated outputs for carry, borrow, and compare toggle states to facilitate system monitoring.

Counter Dividers Applications

• Position tracking systems requiring high-resolution quadrature decoding
• Motor speed measurement and control loops
• Real-time clock implementations using 24-hour counting mode
• Industrial automation counters for event tallying

Counter Dividers Procurement Notes

Verify that the specific part number includes the '-S' suffix to confirm the SOIC package variant. Ensure the host system operates within the specified 3V to 5.5V supply range. Confirm compatibility with the required TTL or CMOS logic levels for the 8-bit data bus interface before integration.

Counter Dividers Selection Notes

Select this component when a dedicated hardware counter with flexible mode configuration is required. It is suitable for applications needing direct microcontroller interfacing without complex external logic. Consider the 40MHz limit for high-speed non-quadrature applications versus the lower quadrature frequency limits.

Counter Dividers Part Context

The LS7166B series consists of CMOS 24-bit counters designed for versatile counting tasks. The family includes DIP, SOIC, and TSSOP package options to accommodate different board layout requirements. This specific model represents the surface-mount SOIC variant within the broader LS7166 product line.

Counter Dividers Replacement Considerations

LS7166B (DIP package)

Counter Dividers FAQ

What is the maximum count frequency for non-quadrature modes?

The maximum count frequency is 40MHz when operating in non-quadrature modes.

How is the 24-bit data transferred to the preset register?

Data is written into the preset register in a three-byte sequence (Byte 0, Byte 1, and Byte 2) via the 8-bit data bus.