Iphone 11PM Motherboard

iPhone 11 Pro Max Logic Board - Key Details

The logic board (or motherboard) is the central nervous system of the phone, housing all critical components.

1. Core Component: A13 Bionic Chip

• Model: APL1W85 (Apple's internal designation).

• Process Technology: 7 nanometers (7nm).

• Architecture: 64-bit ARMv8.3-A.

• CPU: Hexa-core (6-core) CPU:

  • 2 high-performance cores named Lightning.

  • 4 high-efficiency cores named Thunder.

• GPU: 4-core Apple-designed graphics processor.

• Neural Engine: 8-core Neural Engine for machine learning tasks, capable of performing 1 trillion operations per second.

2. Storage (NAND Flash Memory)

• Options: Soldered directly onto the board. Available in 64GB, 256GB, and 512GB capacities.

• Type: NVMe-based flash storage.

3. Memory (RAM)

• Capacity: 4 GB of LPDDR4X RAM.

• Integration: The RAM is stacked on top of the A13 Bionic chip in a Package-on-Package (PoP) design for faster communication.

4. Modem (Cellular Connectivity)

• Model: Intel XMM 7660 (in most models).

• Technology: 4G LTE Advanced Pro. This model does not support 5G.

• Features: Gigabit-class LTE, 4x4 MIMO, LAA.

5. Other Key Chips & Components

• Wi-Fi/Bluetooth: Broadcom chip supporting Wi-Fi 6 (802.11ax) and Bluetooth 5.0.

• UWB (Ultra-Wideband): Not present. This technology was introduced starting with the iPhone 11* (which has U1 chip), but the 11 Pro Max does include the U1 chip for spatial awareness.

• Power Management: Apple-specific PMIC (Power Management Integrated Circuit).

• Audio Chip: Custom Apple audio processor.

6. Physical Characteristics & Repair

• Design: Double-layer stacked board. This complex design makes repairs like microsoldering extremely difficult and is a primary reason Apple recommends board swaps instead of component-level repair.

• IC (Integrated Circuit) Layout: The board contains hundreds of small chips responsible for functions like:

  • Charging (Tristar, Tigris)

  • Touch controller

  • Display backlight control

  • Camera control

• Common Issues: Common logic board failures on this model can include:

  • Baseband issues (no service)

  • Audio IC failures (no microphone/speaker)

  • Charging faults

Summary Table