Description
The M4T28-BR12SH1 Lithium SNAPHAT Battery with Crystal from STMicroelectronics is a specialized backup power solution designed for compatible serial real-time clock (RTC), non-volatile TIMEKEEPER, and supervisor devices using 28- or 44-pin SNAPHAT SOIC packages. STMicroelectronics
This component combines a 48mAh lithium battery with a 32.768 kHz crystal in a detachable SNAPHAT package. The battery is designed to snap directly onto the compatible surface-mounted SOIC device, allowing the battery to be installed after the PCB soldering process and reducing exposure to soldering temperatures. STMicroelectronics
The M4T28-BR12SH1 has a 2.8V nominal battery voltage, 48mAh capacity, and 12.5pF crystal load capacitance. It uses lithium chemistry and is a non-rechargeable battery intended for backup applications. Scribd
Key Features
– Manufacturer: STMicroelectronics
– Part Number: M4T28-BR12SH1
– Battery Type: Lithium coin cell with crystal
– Nominal Voltage: 2.8V
– Capacity: 48mAh
– Crystal Frequency: 32.768 kHz
– Crystal Load Capacitance: 12.5pF
– Rechargeable: No
– Package: 1225 SNAPHAT
– Designed for compatible TIMEKEEPER and RTC devices
– Detachable design for convenient replacement
– Pb-free / ECOPACK1 package
– Operating temperature: 0°C to 70°C STMicroelectronics
The M4T28-BR12SH1 is an ideal choice for electronic equipment requiring reliable long-term RTC and memory backup power in compatible SNAPHAT configurations.

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