2 Pin Descriptions
The descriptions of the pins are listed in Table 2-1.
| Name | 5-Lead SOT23 | 4-Ball WLCSP | Function |
|---|---|---|---|
| SCL | 1 | B1 | Serial Clock |
| GND | 2 | A2 | Ground |
| SDA | 3 | B2 | Serial Data |
| VCC | 4 | A1 | Device Power Supply |
| WP(1) | 5 | — | Write-Protect |
Note:
- If the WP pin is not driven, it is internally pulled down to GND. In order to operate in a wide variety of application environments, the pull‑down mechanism is intentionally designed to be somewhat strong. Once this pin is biased above the CMOS input buffer’s trip point (~0.5 x VCC), the pull‑down mechanism disengages. Microchip recommends connecting this pin to a known state whenever possible.