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| Part Number | SPH0644HM4H-1 | SPH0644HM4H |
| Manufacturer | Knowles | Knowles |
| Series | SiSonic™ SPH | SiSonic™ SPH |
| Packaging | Tape & Reel (TR) | Tray |
| Product Status | Obsolete | Obsolete |
| Type | MEMS (Silicon) | MEMS (Silicon) |
| Output Type | Digital, PDM | Digital, PDM |
| Direction | Omnidirectional | Omnidirectional |
| Frequency Range | 50 Hz ~ 10 kHz | - |
| Sensitivity | -36dB ±1dB @ 94dB SPL | -36dB ±1dB @ 94dB SPL |
| S/N Ratio | 58dB | 58dB |
| Impedance | - | - |
| Voltage - Rated | - | 1.8 V |
| Voltage Range | 1.6 V ~ 3.6 V | 1.6 V ~ 3.6 V |
| Current - Supply | 1.025 mA | 1.025 mA |
| Port Location | Top | Top |
| 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) | 0.037" (0.95mm) | 0.033" (0.85mm) |
| Shape | Rectangular | Rectangular |
| Grade | - | - |
| Qualification | - | - |
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