STMicroelectronics M4T28-BR12SH1 2.8 V 48 mAh SNAPHAT Battery & Crystal Module – RTC Backup Power Solution
-
Integrated Battery & Crystal Module: 2.8 V lithium battery (48 mAh) combined with 32.768 kHz crystal in a SNAPHAT® top for real-time clock backup.
-
Detachable SNAPHAT® Design: Snaps onto SOIC-28/44 package after reflow so the battery avoids high SMT temperatures.
-
Compact Surface-Mount Package: Dimensions ~21.84 mm × 14.99 mm × 7.75 mm for efficient PCB layout in embedded systems.
-
High Precision Timing: Crystal load capacitance 12.5 pF, accuracy ±35 ppm (at 25 °C) for reliable real-time-clock and non-volatile memory applications.
-
Guaranteed Backup Protection: Suitable for industrial embedded equipment, data loggers, automotive ECU backup, and IoT edge devices requiring uninterrupted timekeeping.
- In a flash shipping on all orders
- Safe shopping guarantee
- Secure online payments
- 30 days money back guarantee
STMicroelectronics M4T28-BR12SH1 2.8 V 48 mAh SNAPHAT Battery & Crystal Module – RTC Backup Power Solution
The STMicroelectronics M4T28-BR12SH1 is a precision-engineered SNAPHAT battery & crystal module designed to provide reliable backup power and timing in embedded real-time clock (RTC) and non-volatile memory systems. With a 2.8-volt lithium chemistry and 48 mAh capacity battery, this module ensures continuous timekeeping and data retention even when main power is removed. Packaged in a compact surface-mount SNAPHAT top that snaps onto a motherboard after the high-temperature soldering process, it protects the battery from SMT heat exposure and enables efficient design workflows.
Engineered for robust performance, the module includes a 32.768 kHz crystal with a 12.5 pF load and ±35 ppm frequency accuracy to meet stringent timing requirements in applications like industrial control systems, automotive ECUs, telecommunications equipment, and IoT gateways. Its removable design supports serviceability and proper disposal, while the lead-free / RoHS-compliant packaging aligns with modern environmental standards. Whether integrated into a 28-pin or 44-pin SNAPHAT TIMEKEEPER module, the M4T28-BR12SH1 delivers dependable timekeeping backup in critical electronic architectures.
M4T28-BR12SH1 Specifications:
- IC Function: Timekeeper (Battery & Crystal)
- Supply Voltage Range: 2.8V
- Capacity: 48mAh
- Operating Temperature Range: 0°C to +70°C
- Digital IC Case Style: SNAPHAT
- RoHS Compliant: Yes
M4T28-BR12SH1 Key Features:
- Provides battery backup power for serial real-time clock, non-volatile TIMEKEEPER and supervisor devices in the SNAPHAT SOIC package
- Removable battery avoids heat associated with surface-mount process
- Snaps directly onto surface-mounted SNAPHAT SOIC
- Keyed insertion to ensure proper assembly
- Removable for replacement and proper disposal
Compatible Equipment / Applications:
- Real-time clock backup in microcontroller-based industrial control systems
- Non-volatile memory modules and data loggers requiring timekeeping during power loss
- Automotive ECU boards where time and date retention is critical during shutdown
- IoT edge gateways, wearables, and telematics devices needing tiny backup modules
- Telecommunication and instrumentation systems with embedded RTC modules
| UPC | 025314626128 |
|---|---|
| Condition | New |
| Chemistry | Lithium |
| Output Voltage | 2.8 |
| Amperage | 48mAh |
| Rechargeable | No |
| Voltage | 2.8V |