It8995e 128 Datasheet ^hot^ 【720p】

At first glance, the nomenclature “IT8995E 128” provides immediate, tangible specifications. The “128” suffix is not a marketing gimmick; it explicitly refers to the physical packaging—a 128-pin Quad Flat Package (QFP). As detailed in the mechanical section of the datasheet, this form factor is a deliberate choice. Unlike smaller, harder-to-solder BGA (Ball Grid Array) packages, the 128-pin QFP allows for visual inspection of solder joints and easier rework. This indicates that the IT8995E is designed for longevity and repairability, a critical requirement for industrial motherboards, embedded systems, and high-reliability commercial platforms.

+---------------------------------------+ | ITE | | IT8995E-128 | | (LQFP-128) | Power Inputs ---->| [VCC / VSTBY] [KSO0-KSO15] |----> Keyboard Scan Outputs Ground Reference ->| [GND] [KSI0-KSI7] |----> Keyboard Scan Inputs Programming Pins ->| [EDI / JTAG / I2C] [PWM / TAC] |----> Fan Speed Control System Communication| [LPC / eSPI Bus] [GPIO] |----> Hardware Switches & LEDs +---------------------------------------+

If you are diagnosing a laptop that uses the IT8995E‑128, follow this checklist (compiled from experienced technicians): it8995e 128 datasheet

| Parameter | Symbol | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | | V_VBUS | 4.75 | - | 5.5 | V | | Operating Temperature | T_OP | -40 | - | +85 | °C | | Internal Clock Frequency | f_CLK | - | 32 | - | MHz |

Regulating fan speeds based on temperature sensor data. Programming and Compatibility At first glance, the nomenclature “IT8995E 128” provides

: The hardware reset pin. It must be held high ( 3.3V ) for the chip to run its internal firmware. A constant low (0V) state indicates a reset loop or a faulty pull-up resistor.

: This signal must register 3.3V . If it reads 0V, the EC assumes the laptop lid is closed and ignores the power button. Programming and Compatibility : The hardware reset pin

: The motherboard shows a standby light but refuses to trigger the power sequencing loop.

As an embedded controller, the IT8995E-128 acts as the "manager" for several essential hardware tasks: