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| PartNumber | 254-ECM640-RO | 254-ECM644-RO | 254-ECM6441-RO |
| Description | Microphones OMNIDIRECT 6x3.4mm | Microphones 6.0 x 5.0mm -44dB | Microphones OMNIDIRECT 6x5mm |
| Manufacturer | - | ||
| Product Category | IC Chips | IC Chips | - |
| Packaging | Bulk | Bulk | - |
| Termination Style | Solder Pin | Solder Pad | - |
| Width | 6 mm | - | - |
| Impedance | 2.2 kOhms | 2.2 kOhms | - |
| Sensitivity | - 40 dBA | - 44 dBA | - |
| Diameter | 6 mm | 6 mm | - |
| Operating Supply Voltage | 2 VDC | 2 VDC | - |
| Depth | 3.4 mm | 5 mm | - |
| Width in | 0.236 in | - | - |
| Width mm | 6 mm | - | - |
| Directional Properties | Omnidirectional | Omnidirectional | - |
| Current Rating | - | 0.5 mA | - |