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| Part Number | SPH1668LM4H-1 | SPH1668LM4H |
| Manufacturer | Knowles | Knowles |
| Series | SiSonic™, Zero-Height Mic™, SPH | SiSonic™ SPH |
| Packaging | Tape & Reel (TR) | Tray |
| Product Status | Not For New Designs | Obsolete |
| Type | MEMS (Silicon) | MEMS (Silicon) |
| Output Type | Digital, PDM | Digital, PDM |
| Direction | Omnidirectional | Omnidirectional |
| Frequency Range | 100 Hz ~ 10 kHz | 100 Hz ~ 10 kHz |
| Sensitivity | -29dB ±1dB @ 94dB SPL | -29dB ±1dB @ 94dB SPL |
| S/N Ratio | 65.5dB | 65.5dB |
| Impedance | - | - |
| Voltage - Rated | - | - |
| Voltage Range | 1.62 V ~ 3.6 V | 1.62 V ~ 3.6 V |
| Current - Supply | 700 µA | 700 µA |
| Port Location | Bottom | Bottom |
| Ratings | - | - |
| Termination | Solder Pads | Solder Pads |
| Size / Dimension | 0.138" L x 0.104" W (3.50mm x 2.65mm) | 0.138" L x 0.104" W (3.50mm x 2.65mm) |
| Height (Max) | 0.043" (1.10mm) | 0.039" (0.98mm) |
| Shape | Rectangular | Rectangular |
| Grade | - | - |
| Qualification | - | - |
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