STMicro M4T32-BR12SH6 Clock/Timing - IC Batteries

M4T32-BR12SH6 Description

STMicro M4T32-BR12SH6 is a battery backup power supply device for real-time clock, non-volatile TIMEKEEPER®, and supervisor devices. It comes in a 28- or 44-pin SNAPHAT® SOIC package, which includes a removable battery that provides backup power. The device is designed to avoid the heat associated with the surface-mount process and snaps directly onto the surface-mounted SNAPHAT SOIC. The device has a choice of battery capacities, with the M4T32-BR12SH6 model having a capacity of 120 mAh.

 

 

 

 

 

M4T32-BR12SH6 Features

Provides battery backup power for 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 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 Logic Diagram

 

Mechanical information

Electrical connection to the SOIC is made through four pins that connect to the four press fitted sockets at each end of the SOIC. Critical contact points between the pins and sockets are gold-plated to resist oxidation. Internally, each socket contains six independent contact fingers to form redundant connections between the two components. These sockets were designed with high point contact force to provide the lowest possible contact resistance. The SNAPHAT® top also incorporates four molded-in retaining clips which hold onto the ends of the SOIC ensuring mechanical and electrical connection even under severe mechanical shock and vibration. The combined SOIC and SNAPHAT assembly can sustain shock levels in excess of 100 g without separating. This package also passes variable frequency testing in accordance with MIL-STD-883, method 2007.2, condition A.

Figure 2 illustrates the affect of repeated insertion and extraction of the SNAPHAT top to the SOIC. The force required to extract the SNAPHAT, and then to re-insert it, reduces each time. After four or five extractions, the reduction starts to become unnoticeable and the force required remains at a fairly constant figure. Typically, though, the SNAPHAT will only needto be extracted and re-inserted once in its lifetime.

 

SNAPHAT® insertion/extraction forces

M4T32-BR12SH6 Product Parameter

Manufacturer	STMicroelectronics	Manufacturer's Part #	M4T32-BR12SH6
Categories	Integrated Circuits (ICs)	Sub-Categories	Clock/Timing - IC Batteries
Series	Timekeeper®, Snaphat®	Part Status	Active
Type	Battery and Crystal	Battery Chemistry	Lithium
Capacity	120mAh	Voltage - Rated	2.8V
Frequency	32.768kHz	Load Capacitance	12.5pF
Operating Temperature	-40°C~85°C TA	Factory Lead Time	12 Weeks
Lifecycle Status	ACTIVE (Last Updated: 7 months ago)	Contact Plating	Gold
Mount	Through Hole	Package / Case	SOIC
Number of Pins	4	Weight	1.8g
Packaging	Bulk	Number of Terminations	4
Termination	SMD/SMT	Technology	CMOS
Terminal Position	DUAL	Terminal Form	PIN/PEG
Peak Reflow Temperature (Cel)	260	Supply Voltage	2.8V
Depth	21.84mm	Reflow Temperature-Max (s)	40
Base Part Number	M4T32	Pin Count	4
Output Voltage	2.8V	Lead Length	2.29mm
Operating Supply Voltage	3V	ESR (Equivalent Series Resistance)	60kOhm
Supply Voltage-Max (Vsup)	3V	Lead Diameter	560 μm
Frequency Tolerance	0.0035%	Number of Timers	1
Rechargeability	Non-Rechargeable	Ambient Temperature Range High	85°C
Height	8.51mm	Length	21.84mm
Width	18.03mm	Radiation Hardening	No
RoHS Status	ROHS3 Compliant	Lead Free	Lead Free

 

M4T32-BR12SH6 Manufacturer

STMicroelectronics is the largest European semiconductor contract manufacturing and design company. The company provides a wide range of semiconductor products including microcontrollers, analog devices, digital signal processors, sensors, power semiconductors, and wireless communication solutions. Its customers come from various industries including automotive, consumer electronics, industrial automation, and telecommunications.