SPH1668LM4H-1

Overview

The SPH1668LM4H-1 is a miniature, high-performance, low-power bottom port silicon digital microphone manufactured by Syntiant. It features a single-bit PDM output and operates within a voltage range of 1.62 V to 3.6 V. The device provides an omnidirectional frequency response from 100 Hz to 10 kHz with a sensitivity of -29dB ±1dB at 94dB SPL. Its compact rectangular dimensions are 3.50mm x 2.65mm.

Feature Summary

• Bottom port design for optimized acoustic performance
• Single-bit PDM digital output interface
• Low power consumption suitable for battery-operated devices

Applications

• Voice-controlled smart home devices
• Wearable audio technology
• Mobile communication handsets

Procurement Notes

Verify the specific datasheet version before integration, as manufacturing specifications may evolve. Confirm that the supply chain status aligns with current production schedules. Ensure compatibility with existing PDM interfaces on the target system controller. Review environmental compliance documentation for final assembly requirements.

Selection Notes

Select this component when a small form factor and low power usage are critical constraints. The bottom port configuration is ideal for applications requiring direct sound access from the underside of the PCB. Verify that the operating voltage range matches the system's power rail availability.

Part Context

This part belongs to Syntiant's SISONIC MEMS microphone family, which focuses on high signal-to-noise ratio and low power consumption. These microphones are designed for edge AI and always-on voice recognition applications where efficiency and size are paramount.

Replacement Considerations

Check for official Syntiant cross-reference lists for direct replacements. Ensure any substitute maintains the same PDM interface protocol and physical footprint to avoid PCB redesign.