74AC169SC

Counter Dividers Overview

The onsemi 74AC169SC is a fully synchronous 4-stage bidirectional binary counter housed in a 16-lead Small Outline Integrated Circuit (SOIC) package. It operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature from -40°C to +85°C. The device features parallel preset capability, carry lookahead for cascading, and outputs capable of sourcing or sinking 24 mA. Maximum clock frequency reaches 154 MHz at 5.0V, with propagation delays ranging from 1.5 ns to 13.0 ns depending on voltage and load conditions.

Counter Dividers Feature Summary

• Fully synchronous 4-stage up/down counting architecture utilizing edge-triggered J-K flip-flops
• Built-in carry lookahead capability designed to facilitate easy cascading of multiple counters
• Programmable operation enabled through parallel data inputs and dedicated parallel enable control
• Robust output drive strength allowing both source and sink currents of 24 mA

Counter Dividers Applications

• Synchronous digital timing circuits requiring precise count direction control
• Frequency division networks utilizing the terminal count output
• Cascaded multi-stage binary counting systems leveraging internal carry lookahead
• Programmable interval generators using parallel preset functionality

Counter Dividers Procurement Notes

Verify that the specific ordering code matches the required package style, as the 74AC169 series is available in SOIC, SOP, TSSOP, and PDIP variants. Confirm that the suffix 'X' is not appended if tape and reel packaging is not required, as standard units are typically supplied in tubes. Ensure system design remains within absolute maximum ratings to prevent device damage.

Counter Dividers Selection Notes

Select this component when a synchronous bidirectional counter with high-speed performance is required. The AC logic family offers reduced power consumption compared to older standards while maintaining TTL-compatible noise margins. Consider the 24 mA output drive for direct interfacing with moderate loads without additional buffering. Verify that the 16-pin footprint aligns with the PCB layout constraints.

Counter Dividers Part Context

This part belongs to the 74AC logic family, characterized by advanced CMOS technology offering high speed and low power dissipation. The 74AC169 specifically implements a modulo-16 binary counter function. It is manufactured under the Fairchild Semiconductor brand, which is now part of onsemi, ensuring compatibility with standard industrial logic interfaces.

Counter Dividers Replacement Considerations

Direct pin-compatible substitutes include other 74AC169 variants from different manufacturers, such as those in SOIC-16 packages. Ensure replacement parts maintain the same voltage range and speed grades. Verify that any alternative maintains the synchronous operation mode and carry lookahead features.