SA556N

Programmable Timers And Oscillators Overview

The SA556N is a dual precision timer integrated circuit manufactured by Texas Instruments, belonging to the SA556 series. It integrates two independent 555-type timers within a single 14-pin PDIP package. The device operates on a supply voltage range of 4.5 V to 16 V and supports a maximum frequency of 100 kHz. It features TTL-compatible outputs with high drive capability, providing 200 mA sink and source current. The component is designed for industrial temperature ranges, functioning reliably between -40 °C and +85 °C.

Programmable Timers And Oscillators Feature Summary

• Dual Timer Configuration: Contains two independent precision timers in one 14-PDIP package.
• High Output Drive: Supports 200 mA sink and source current for direct load driving.
• Wide Operating Voltage: Functions effectively with supply voltages from 4.5 V to 16 V.
• Industrial Temperature Range: Rated for operation from -40 °C to +85 °C.

Programmable Timers And Oscillators Applications

• DC-to-AC oscillators
• Tone generation circuits
• Sequential timing events
• Time delay generation

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix 'E4' if environmental compliance documentation is required, as it indicates lead-free status. Confirm package type availability, as surface mount variants like SA556DR exist. Check manufacturer lifecycle status, as some listings indicate end-of-life phases for certain revisions. Ensure the 14-PDIP through-hole format matches the target PCB design constraints.

Programmable Timers And Oscillators Selection Notes

Select the SA556N when two independent timing channels are needed in a single footprint. Choose this over the NE556N variant if an extended industrial temperature range (-40 °C to +85 °C) is required, as the NE version typically covers 0 °C to 70 °C. Consider the SA556DR for surface mount applications requiring the same electrical specifications but in an SOIC package.

Programmable Timers And Oscillators Part Context

The SA556N is part of the broader 555 timer family, specifically the dual-timer derivative. It shares internal architecture with the SA555 but consolidates two units into a 14-pin interface. This configuration reduces board space compared to using two separate SA555 components. It serves as a standard solution for analog timing and pulse generation tasks in mixed-signal circuits.

Programmable Timers And Oscillators Replacement Considerations

The NE556N is a pin-compatible alternative but typically offers a commercial temperature range (0 °C to 70 °C). The SA556DR provides the same electrical performance in a surface-mount SOIC-14 package. Verify that the replacement meets the specific thermal requirements of the application environment.