MT6781V IC

Product Details
Product Details:

- Part Number: MT6781V (Common Markings: MT6781V/CD, MT6781V CD V21, MT6781V CD V22)

- Commercial Name: MediaTek Helio G96

- Manufacturer: MediaTek Inc. (MTK)

- Fabrication Process: 12nm FinFET Technology (TSMC)

- Core Architecture (Octa-Core 64-bit):

* 2x High-Performance ARM Cortex-A76 Cores clocked up to 2.05 GHz

* 6x High-Efficiency ARM Cortex-A55 Cores clocked up to 2.0 GHz

- Graphics Processing Unit (GPU): ARM Mali-G57 MC2

- Display & Camera Pipeline:

* Supports up to 120Hz FHD+ Refresh Rates

* Triple-core ISP supporting up to 108 MP Primary Camera Sensors (e.g., Samsung ISOCELL HM2)

- Memory & Storage Subsystems:

* RAM: Dual-Channel LPDDR4X up to 2133 MHz

* Storage Interface: High-Speed UFS 2.2 and eMMC 5.1

- Typical Companion ICs on Motherboard:

* Master PMIC: MT6358W / MT6359 series

* Sub-PMIC / Fast Charging: MT6360 / BQ25970 / RT9471

* RF Transceiver: MT6177W / MT6186W

- Package Type: BGA (Ball Grid Array)

- Stencil Compatibility: Amaoe MT6781V Dedicated Stencil / Amaoe MT-CPU Stencil (0.12mm)

- Recommended Reballing Paste: 183°C Leaded Solder Paste (Mechanic / Relife)

Usage:

- Circuit Function:

* Central logic and application execution hub powering display drivers, computational photography, neural processing, and integrated 4G Cat-13 LTE modem tasks.

- Target Smartphone Brands & Popular Models:

* Xiaomi / Redmi / POCO:

- Redmi Note 11 Pro 4G (Viva)

- Redmi Note 11S (Fleur)

- POCO M4 Pro 4G (Fleur)

* Infinix:

- Infinix Note 11 Pro

- Infinix Note 12 G96 (X670)

- Infinix Note 12 VIP

* Tecno:

- Tecno Camon 18 Premier

- Tecno Camon 19 Pro

- Tecno Pova 3

* Realme:

- Realme 8i, Realme Narzo 50

* Vivo:

- Vivo V23e 4G (V2116)

- Common Motherboard Fault Signatures & Repair Diagnostics:

* Logo Bootloop / Fastboot Restart:

- High-frequency gaming and charging heat cause micro-fractures in the factory lead-free solder balls underneath the Cortex-A76 performance cluster. The phone reboots continuously at the MIUI / Infinix logo. Resolved by CPU reballing.

* Dead Handset with Fixed Amperage Draw (0.08A - 0.18A):

- Handset does not power on. DC power supply indicates a locked current around 0.12A when pressing the power button, signifying that PMIC supplies are active but CPU handshake with LPDDR4X RAM is broken.

* MediaTek USB Port (COM Port Handshake Only):

- Device connects to PC via USB solely in MTK Brom/Preloader COM port mode without booting into system, indicative of broken bus lines between the CPU and UFS storage.

* Camera Freeze / Black Screen on 108MP Sensor:

- Opening the camera app crashes the phone or displays a black viewfinder, caused by broken MIPI CSI differential pairs connecting the main camera to the Helio G96 ISP pins.