Touch Sensor / Capacitive Proximity Detector IC Manufacturer: (Generic / Eval to TTP223 or Similar Architecture) Package: SOT-23-6
By following this guide and exploring the 8681L IC datasheet, you'll be well on your way to unlocking the secrets of this versatile and widely used IC.
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Supply Voltage | VDD | 2.0 | 3.0 | 5.5 | V | | | Supply Current | IDD | - | 2.5 | 10 | μA | No Load | | Input Impedance | Zin | - | 10 | - | MΩ | Internal Pull-up/down | | Output Voltage (High) | VOH | 0.9 VDD | - | - | V | IOH = -1mA | | Output Voltage (Low) | VOL | - | - | 0.1 VDD | V | IOL = 1mA | | Response Time | Tres | - | 60 | - | ms | Touch Detection | | Sensitivity Cap Range | C_s | - | 0 ~ 50 | - | pF | Determines detection distance | 8681l ic datasheet
I searched for the exact term , but I could not find a verified or widely recognized integrated circuit (IC) with that precise part number in major databases (e.g., Texas Instruments, Analog Devices, NXP, or standard distributor inventories like Mouser/Digikey).
Many "6V max" LDOs will fail at 6.2V. If your supply is a 5V USB that can spike to 5.5V, you are safe. But if you use a 9V wall adapter, the 8681L will be destroyed instantly. If your supply is a 5V USB that can spike to 5
Note: Some 3-pin SOT-89 versions omit the EN pin and NC.
: Inspect the high-side current sensors and corresponding gate paths to see if the IC is properly driving the isolation switches. : Inspect the high-side current sensors and corresponding
This IC is typically found in cell phone cameras to control autofocus and aperture mechanisms, not in laptop power management.
: SMBus (System Management Bus) , permitting real-time programmable charge voltage and charge current adjustments from the system's Embedded Controller (EC).
Over-current protection (OCP) for both the input adapter and charging paths.
A crucial point for troubleshooting is that the OZ8681L requires a proper power supply to function. Reports from the field confirm that for the chip to enable charging, it must first receive its main operating voltage. On many motherboards, this voltage is controlled by a separate transistor and an enable signal (often labeled something like LOT6_CHG ) from the Embedded Controller (EC).