SE556JB

Programmable Timers And Oscillators Overview

The SE556JB is a dual precision timer integrated circuit manufactured by Texas Instruments, featuring two independent 555-type timers within a single 14-lead ceramic dual in-line package (CDIP). It operates on a single power supply ranging from 4.5 V to 16 V and supports a wide industrial temperature range of -55°C to +125°C. The device provides TTL-compatible outputs with high current drive capabilities, sourcing and sinking up to 200 mA per channel. Typical operating supply current is 2 mA. This component is designed for robust performance in demanding environments requiring precise timing control.

Programmable Timers And Oscillators Feature Summary

• Dual precision timer architecture integrating two independent 555-type oscillators
• Wide operating temperature range suitable for harsh industrial conditions
• High output current drive capability for direct load interfacing
• TTL-compatible logic levels for straightforward digital integration

Programmable Timers And Oscillators Applications

• Precision timing and delay circuits
• Oscillator applications
• Industrial control systems
• Measurement equipment

Programmable Timers And Oscillators Procurement Notes

Verify the specific manufacturer part number against official Texas Instruments documentation to ensure authenticity. Confirm that the CDIP-14 package matches your PCB footprint requirements. Check RoHS compliance status as indicated in the official datasheet. Ensure the operating temperature range meets your application's environmental specifications before procurement.

Programmable Timers And Oscillators Selection Notes

Select this component when dual independent timers are required in a single package. Consider the ceramic package for superior thermal stability compared to plastic variants. Verify voltage supply constraints align with the 4.5 V to 16 V operational range. Evaluate the need for high current drive if connecting loads directly to the output pins.

Programmable Timers And Oscillators Part Context

The SE556JB belongs to the NE556/SE556 family of dual precision timers. It shares functional similarities with the NE556DR but differs in packaging and temperature rating. The SE series typically denotes military or extended temperature grade components. This part serves as a dual-channel alternative to single timer ICs, reducing board space while maintaining precision timing functions.

Programmable Timers And Oscillators Replacement Considerations

NE556DR offers similar functionality in a SOIC package with standard commercial temperature range. SE556J is a variant in a different CDIP configuration. Verify pin compatibility and thermal ratings when substituting.