Component Reference

Deep-dive pages for integrated circuits found on Apple logic boards. Each page covers role, key signals, measurement values, common failure modes, and a diagnostic workflow — a field reference for board-level technicians.

3 of 34 components documented

Power Management

• ISL6259Multi-phase battery charger IC used on Intel MacBooks820-3787, 820-4924, 820-00165, 820-00239
• ISL9239Battery charger IC used on T2 and Apple Silicon MacBooks820-01521, 820-02060, 820-02521, 820-02969
• ISL6258Earlier single-phase battery charger, pre-Retina era820-2936, 820-3115, 820-3332
• MAX17201Fuel gauge IC that tracks battery state-of-charge820-01521, 820-02060, 820-02521
• TPS51219Synchronous buck controller for DDR memory rails820-3787, 820-4924, 820-00165
• CD3215USB-C port controller and power delivery IC (used in pairs on MBP)820-00239, 820-01521, 820-01700
• CD3217Updated USB-C controller replacing CD3215 on newer boards820-02060, 820-02521, 820-02969
• MP2973Multi-phase CPU core voltage regulator820-01521, 820-02521
• SY8208Compact synchronous buck converter for secondary rails820-3787, 820-4924, 820-00165, 820-00239
• RT8110PWM controller for DDR power rail generation820-3787, 820-4924

System Controller

• SMC (T2)Apple T2 security chip integrating SMC, SSD, secure boot820-01521, 820-01700, 820-02060
• SMC (M-series)SMC function integrated into Apple Silicon SoC820-02521, 820-02969, 820-03680
• ITE IT8913EEmbedded controller handling keyboard, touchpad, LEDs on older boards820-3787, 820-4924, 820-00165

USB-C / Thunderbolt

• ANX7411USB-C DisplayPort Alt Mode mux/redriver820-02060, 820-02521
• PS5169USB 3.2 signal redriver for Thunderbolt/USB-C lanes820-01521, 820-02060, 820-02521
• Titan RidgeIntel Thunderbolt 3 controller (JHL6340/6540)820-00239, 820-01521, 820-01700
• Maple RidgeIntel Thunderbolt 4 controller820-02060

Display

• MP3309White LED backlight boost controller820-3787, 820-4924, 820-00165
• LM3534Dual-string LED driver for LCD backlighting820-3332, 820-2936
• TPS65132Dual-output (positive + negative) LCD bias supply820-3787, 820-4924, 820-00165, 820-00239

Audio

• CS42L83Low-power audio codec for headphone jack + internal audio820-3787, 820-4924, 820-00165, 820-00239
• SSM3515Class-D smart amplifier driving internal speakers820-00239, 820-01521, 820-02060
• TAS5770Smart amp with speaker protection, used on M-series MacBooks820-02521, 820-02969

Storage

• ANS2 (Apple NVMe)Apple proprietary NVMe SSD controller integrated on T2 boards820-01521, 820-01700, 820-02060
• NVMe NAND (Kioxia/SK Hynix)NAND flash packages paired with Apple NVMe controller820-01521, 820-01700, 820-02060, 820-02521

Clock / Oscillator

• SiT1602Automotive-grade MEMS oscillator, 32.768 kHz RTC reference820-3787, 820-4924, 820-00165, 820-00239…
• SiT8008Programmable MEMS oscillator used for PCIe/Thunderbolt reference clocks820-00239, 820-01521, 820-02060
• CY22393Programmable clock synthesizer for multiple frequency outputs820-3787, 820-4924

Logic / Mux

• SN74LVC1G08Single 2-input AND gate, used in enable signal chains820-3787, 820-4924, 820-00165, 820-00239
• PI3USB31532USB 3.1 Gen 2 10 Gbps mux for USB-C lane switching820-01521, 820-02060
• FUSB302USB Type-C and USB PD protocol controller (policy engine)820-00165, 820-00239

Sensors

• NTC ThermistorNegative Temperature Coefficient resistor used for thermal sensing820-3787, 820-4924, 820-00165, 820-00239…
• TMP103I²C digital temperature sensor for local thermal monitoring820-3787, 820-4924, 820-00165
• SMBus Gas GaugeBattery pack embedded gas gauge communicating via SMBus820-3787, 820-4924, 820-00165, 820-00239