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| Part Number | LTC4121IUD-4.2 | LTC4120IUD-4.2 | LTC4121EUD-4.2 |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Product Status | Obsolete | Obsolete | Obsolete |
| Battery Chemistry | Lithium Ion/Polymer | Lithium Ion/Polymer | Lithium Ion/Polymer |
| Number of Cells | - | 1 | - |
| Current - Charging | Constant - Programmable | Constant - Programmable | Constant - Programmable |
| Programmable Features | - | - | - |
| Fault Protection | - | - | - |
| Charge Current - Max | 400mA | 400mA | 400mA |
| Battery Pack Voltage | 4.2V | 4.2V | 4.2V |
| Voltage - Supply (Max) | 40V | 40V | 40V |
| Interface | - | - | - |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 16-WFQFN Exposed Pad | 16-WFQFN Exposed Pad | 16-WFQFN Exposed Pad |
| Supplier Device Package | 16-QFN (3x3) | 16-QFN (3x3) | 16-QFN (3x3) |
