M4T32-BR12SH6 Battery: Battery with CrystaL, Datasheet, and Feature
2.8V Battery and Crystal IC Batteries Timekeeper®, Snaphat® Series M4T32 4 Pins 32.768kHz 2.8V SOIC









2.8V Battery and Crystal IC Batteries Timekeeper®, Snaphat® Series M4T32 4 Pins 32.768kHz 2.8V SOIC
M4T32-BR12SH6 is a Real-time clock and TIMEKEEPER® SNAPHAT® battery with Crystal. This post will unlock its pinout, datasheet, feature and more about M4T32-BR12SH6.
M4T32-BR12SH6 Logic Diagram

Signal Names
| X1 | Crystal input |
| X2 | Crystal output |
| VBAT- | Negative voltage |
| VgBAT+ | Positive voltage |
M4T32-BR12SH6 Overview
The M4T32-BR12SH6 SNAPHAT ® top is a detachable lithium power source for ST’s serial real-time clock and non-volatile TIMEKEEPER ® surface-mount SOIC package (28- and 44 -pin). The SNAPHAT top contains both the battery and crystal and is designed to be “snapped on” after the SOIC is surface mounted on the PC board. Thus the two-piece solution prevents the battery and crystal from being exposed to the high SNAPHAT temperatures of the surface-mount process.
M4T32-BR12SH6 Feature
Provides battery backup power for the serial real-time clock, non-volatile TIMEKEEPER ® and supervisor devices in the 28 - or 44 -pin SNAPHAT® SOIC package
Removable battery avoids heat associated with the surface-mount process
Snaps directly onto surface-mounted SNAPHAT SOIC
Choice of battery capacities
– M4T28-BR12SH = 48 mAh
– M4T32-BR12SH = 120 mAh
Keyed insertion to ensure proper assembly
Removable for replacement and proper disposal
Pb-free package
Available in Ecopack® packages, tubes
M4T32-BR12SH6 Application
Security
Communications
Networking
M4T32-BR12SH6 Battery Characteristics

M4T32-BR12SH6 Battery Discharge Rate
The figure above illustrates the lithium coin cell discharge rate for a given load. This demonstrates the characteristically flat voltage level supplied by the battery until very near the end of its life. These discharge levels have been greatly accelerated in comparison to the normal, actual usage.
M4T32-BR12SH6 Package

M4T32-BR12SH6 Package
M4T32-BR12SH6 Manufacturer
STMicroelectronics is a global independent semiconductor company and is a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence trends.
The related part article:
M4T28-BR12SH1 Battery: M4T28-BR12SH1 Datasheet, Logic Diagram
Specifications
- TypeParameter
- Lifecycle Status
Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.
ACTIVE (Last Updated: 7 months ago) - Factory Lead Time12 Weeks
- Contact Plating
Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.
Gold - Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Through Hole - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
SOIC - Number of Pins4
- Weight1.8g
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~85°C TA - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Bulk - Series
In electronic components, the "Series" refers to a group of products that share similar characteristics, designs, or functionalities, often produced by the same manufacturer. These components within a series typically have common specifications but may vary in terms of voltage, power, or packaging to meet different application needs. The series name helps identify and differentiate between various product lines within a manufacturer's catalog.
Timekeeper®, Snaphat® - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations4
- Termination
Termination in electronic components refers to the practice of matching the impedance of a circuit to prevent signal reflections and ensure maximum power transfer. It involves the use of resistors or other components at the end of transmission lines or connections. Proper termination is crucial in high-frequency applications to maintain signal integrity and reduce noise.
SMD/SMT - ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - TypeBattery and Crystal
- Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
DUAL - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
PIN/PEG - Peak Reflow Temperature (Cel)
Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.
260 - Supply Voltage
Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.
2.8V - Depth
In electronic components, "Depth" typically refers to the measurement of the distance from the front to the back of the component. It is an important parameter to consider when designing or selecting components for a project, as it determines how much space the component will occupy within a circuit or device. The depth of a component can impact the overall size and layout of the circuit board or enclosure in which it will be installed. It is usually specified in millimeters or inches and is crucial for ensuring proper fit and functionality within the intended application.
21.84mm - Frequency
In electronic components, the parameter "Frequency" refers to the rate at which a signal oscillates or cycles within a given period of time. It is typically measured in Hertz (Hz) and represents how many times a signal completes a full cycle in one second. Frequency is a crucial aspect in electronic components as it determines the behavior and performance of various devices such as oscillators, filters, and communication systems. Understanding the frequency characteristics of components is essential for designing and analyzing electronic circuits to ensure proper functionality and compatibility with other components in a system.
32.768kHz - Time@Peak Reflow Temperature-Max (s)
Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.
40 - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
M4T32 - Pin Count
a count of all of the component leads (or pins)
4 - Output Voltage
Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.
2.8V - Lead Length
Lead length refers to the distance from the body of an electronic component to the end of its leads or terminals. It is an important specification in component design and packaging, as it affects the ease of soldering, the overall fit within a circuit board, and the electrical performance. Longer leads can facilitate easier connections but may also introduce increased resistance or inductance in high-frequency applications. Proper lead length is crucial for ensuring reliable connections and optimal performance in electronic circuits.
2.29mm - Operating Supply Voltage
The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.
3V - ESR (Equivalent Series Resistance)
Equivalent Series Resistance (ESR) is a parameter that describes the internal resistance of a capacitor or an inductor in an electronic circuit. It represents the total resistance that is present in series with the ideal capacitance or inductance of the component. ESR is typically caused by factors such as the resistance of the conductive materials used in the component, the connections within the component, and the dielectric material used. A lower ESR value is desirable in electronic components as it indicates better performance and efficiency, especially in applications where high-frequency signals or rapid changes in voltage are involved. ESR is an important parameter to consider when selecting components for applications such as power supplies, filtering circuits, and signal processing.
60kOhm - Supply Voltage-Max (Vsup)
The parameter "Supply Voltage-Max (Vsup)" in electronic components refers to the maximum voltage that can be safely applied to the component without causing damage. It is an important specification to consider when designing or using electronic circuits to ensure the component operates within its safe operating limits. Exceeding the maximum supply voltage can lead to overheating, component failure, or even permanent damage. It is crucial to adhere to the specified maximum supply voltage to ensure the reliable and safe operation of the electronic component.
3V - Lead Diameter
The parameter "Lead Diameter" in electronic components refers to the diameter of the metal wires or leads that are attached to the component for electrical connection. These leads are typically made of materials like copper or aluminum and are used to connect the component to a circuit board or other electronic devices. The lead diameter is an important specification as it determines the size of the holes needed in the circuit board for proper insertion and soldering of the component. It also affects the overall mechanical strength and durability of the component, as thicker leads are generally more robust and less prone to damage during handling or assembly.
560 μm - Load Capacitance
the amount of capacitance measured or computed across the crystal terminals on the PCB. Frequency Tolerance. Frequency tolerance refers to the allowable deviation from nominal, in parts per million (PPM), at a specific temperature, usually +25°C.
12.5pF - Frequency Tolerance
the maximum allowable deviation from the nominal crystal frequency at a specified temperature, usually 25℃. The recommended frequency tolerance of the crystal over the manufacturing process is ±50 ppm.
0.0035% - Battery Chemistry
A battery is a device that stores chemical energy, and converts it to electricity. This is known as electrochemistry and the system that underpins a battery is called an electrochemical cell. A battery can be made up of one or several (like in Volta's original pile) electrochemical cells.
Lithium - Capacity
In electronic components, "Capacity" typically refers to the maximum amount of electrical charge that a component can store. It is measured in units called farads (F). Capacitors are the most common components that have a capacity rating. The capacity of a capacitor determines how much energy it can store and release when connected in a circuit. Higher capacity capacitors can store more charge and are often used in applications requiring larger energy storage or filtering capabilities. It is important to select a capacitor with the appropriate capacity to ensure proper functioning of the circuit.
120mAh - Number of Timers1
- Rechargeability
The quality of being rechargeable, especially with reference to an electric battery or device.
Non-Rechargeable - Ambient Temperature Range High
This varies from person to person, but it is somewhere between 68 and 77 degrees F on average. The temperature setting that is comfortable for an individual may fluctuate with humidity and outside temperature as well. The temperature of an air conditioned room can also be considered ambient temperature.
85°C - Height8.51mm
- Length21.84mm
- Width18.03mm
- REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - Radiation Hardening
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
No - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
Datasheet PDF
- Datasheets :
- MSDS Material Safety Datasheet :
Trend Analysis
What is a detachable lithium power source for STs serial real-time clock and non-volatile TIMEKEEPER?
M4T32-BR12SH6 SNAPHAT ® top.
Where is the SOIC surface mounted?
the PC board.
What prevents the battery and crystal from being exposed to the high SNAPHAT temperatures of the surface-mount process?
the two-piece solution.
What is the role of a timekeeper?
A timekeeper in a meeting is a person who takes on the role of measuring or recording the amount of time taken to do something. The timekeeper essentially helps the facilitator move the group through the agenda, reducing the amount of stress on the facilitator or leader who is managing the discussion.
What is M4T32-BR12SH6?
The M4T32-BR12SH6 is a 120mAh detachable Lithium coin Cell Battery with crystal. The detachable Lithium power source for ST's serial real-time clock. The SNAPHAT® top contains both the battery and crystal and is designed to be snapped on after the SOIC is surface mounted on the PC board. Thus the 2-piece solution prevents the battery and crystal from being exposed to the high temperatures of the surface-mount process.
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