The SLG3NB148CV (148CV) Charging / RTC Clock & Power Management IC is a compact power-logic component used in Apple logic boards, where it commonly appears as U1900 in the Real-Time Clock subsystem. This IC manages tasks such as clock buffering, low-power timing, reset timing, and certain sequencing events needed by the SMC and PMU for proper system startup.
Faulty or damaged SLG3NB148CV components often produce symptoms like:
- Mac not powering on
- No fan spin / no chime
- RTC losing date and time
- Random system resets
- Sleep/wake instability
- Logic-rail startup issues
Because it sits in a critical low-power and timing pathway, this IC is a frequent replacement part during logic-board repair for Macs.
The chip is also suitable for:
- Wearable electronics
- Embedded RTC modules
- Low-power IoT devices
- Portable consumer products
At OKSpare Nehru Place, the SLG3NB148CV IC is available in ready stock, fully quality-tested, and supplied in both wholesale and retail quantities for Apple logic-board repair professionals.