NE556D

Programmable Timers And Oscillators Overview

The NE556D is a dual precision timer integrated circuit manufactured by Texas Instruments, housed in a 14-pin SOIC surface-mount package. It integrates two independent 555-type timers within a single device, operating on a supply voltage range of 4.5V to 16V. The component supports frequencies up to 100kHz and functions in both astable and monostable modes. It draws a maximum supply current of 20mA and provides high-level output currents of 200mA and low-level output currents of -200mA. The device operates within a commercial temperature range of 0°C to +70°C.

Programmable Timers And Oscillators Feature Summary

• Dual Timer Configuration: Integrates two independent 555-type timers in one 14-SOIC package.
• Wide Supply Voltage Range: Operates reliably from 4.5V to 16V.
• High Output Drive Capability: Supports 200mA source/sink output currents for direct load driving.
• Surface Mount Packaging: Available in standard 14-SOIC (0.154" width) for automated assembly.

Programmable Timers And Oscillators Applications

• DC-to-DC converters
• Voltage monitors
• Logic timing circuits

Programmable Timers And Oscillators Part Context

The NE556D belongs to the NE556 family of dual precision timers. While the base NE556D part number indicates a specific manufacturing run or variant, it shares core electrical characteristics with other members like the NE556DR. The 'D' suffix typically denotes the SOIC package type. This component serves as a compact alternative to using two separate single-timer ICs, reducing board space in timing applications.

Programmable Timers And Oscillators Replacement Considerations

The NE556D is listed as obsolete. The manufacturer recommends the NE556DR as a direct replacement. Both parts share identical electrical specifications and pinouts, differing primarily in packaging format (tube vs. reel). Designers should verify that the NE556DR availability meets production requirements.