NA556D

Programmable Timers And Oscillators Overview

The NA556D is a dual precision timer integrated circuit manufactured by Texas Instruments, belonging to the NA55x series. It integrates two independent 555-type timers within a single 14-pin SOIC package. The device operates on a supply voltage range of 4.5 V to 16 V and supports frequencies up to 100 kHz. It features TTL-compatible outputs with high drive capabilities, including a high-level output current of 200 mA and a low-level output current of -200 mA. The component is designed for surface-mount installation and functions within an operating temperature range of -40°C to +105°C.

Programmable Timers And Oscillators Feature Summary

• Dual Timer Configuration: Contains two independent precision timers in one package.
• High Drive Output: Provides 200 mA source/sink current capability.
• Wide Operating Voltage: Supports 4.5 V to 16 V supply range.
• Industrial Temperature Range: Rated for operation from -40°C to +105°C.

Programmable Timers And Oscillators Applications

• Dual-channel timing circuits
• Pulse width modulation systems
• Frequency division applications

Programmable Timers And Oscillators Part Context

The NA556D is part of the NA55x family, which offers industrial temperature specifications compared to the commercial NE55x series. It serves as the dual-timer counterpart to the single-timer NA555. The 'D' suffix indicates the 14-SOIC surface-mount package. This component is functionally compatible with other industry-standard dual 555 timers but is distinguished by its specific TI manufacturing parameters and industrial grade rating.

Programmable Timers And Oscillators Replacement Considerations

The NE556DR is listed as a manufacturer-recommended alternative for the discontinued NE556D. However, the NE556 is a commercial grade device (0°C to 70°C), whereas the NA556D is industrial grade (-40°C to 105°C). Substitution requires verifying that the lower temperature range of the NE556 meets the application requirements.