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| PartNumber | FSA850UCX | FSA859UCX | FSA8500UCX |
| Description | Switch ICs - Various Audio 3 or 4-Pole MIC-GND Switch | Analog Switch ICs Dual-Voltage 0.8 Ohm SPDT w/Power-Off Iso | IC AUDIO JACK DETECTOR WLCSP |
| Manufacturer | ON Semiconductor | ON Semiconductor | - |
| Product Category | Switch ICs - Various | Analog Switch ICs | - |
| RoHS | Y | Y | - |
| Product | Microphone Switches | - | - |
| Number of Switches | 2 Switch | 1 Switch | - |
| Configuration | 2 x SPDT | 1 x SPDT | - |
| On Resistance Max | 1 Ohms | 750 mOhms | - |
| Operating Supply Voltage | 2.3 V to 4.5 V | 1.65 V to 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | WLCSP-12 | WLCSP-8 | - |
| Packaging | Reel | Reel | - |
| Series | FSA850 | FSA859 | - |
| Brand | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild | - |
| Off Time Max | 1 us | 20 ns | - |
| On Time Max | 1 us | 25 ns | - |
| Product Type | Switch ICs - Various | Analog Switch ICs | - |
| Factory Pack Quantity | 3000 | 3000 | - |
| Subcategory | Switch ICs | Switch ICs | - |
| Supply Voltage Max | 4.5 V | 5.5 V | - |
| Supply Voltage Min | 2.3 V | 1.65 V | - |
| Unit Weight | 0.002222 oz | 0.001482 oz | - |
| Switch Voltage Max | - | 4.5 V | - |
| Height | - | 0.38 mm | - |
| Length | - | 1.91 mm | - |
| Supply Type | - | Single Supply | - |
| Width | - | 0.91 mm | - |
| Supply Current Max | - | 50 nA | - |
| Pd Power Dissipation | - | 180 mW | - |
| Switch Continuous Current | - | 200 mA | - |