M4T28-BR12SH1 STMICROELECTRONICS | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 16

Technical content

Datasheet sections

  • 1 Description
  • 2 Maximum ratings
  • 3 DC and AC parameters
  • 4 Mechanical information
  • 4.1 Battery characteristics
  • 4.2 UL recognition
  • 4.3 Battery life
  • 4.4 General notes
  • 5 Package mechanical data
  • 6 Part numbering
  • 7 Environmental information
  • 8 Revision history

Features

■ Provides battery backup power for 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 or tape & reel SNAPHAT (SH) battery/crystal

Table 4. SH – 4-pin SNAPHAT® housing for 48 mAh battery & crystal, package mechanical data 11 Table 5. SH – 4-pin SNAPHAT® housing for 120 mAh battery & crystal,

1 Description

volatile TIMEKEEPER® surface-mount SOIC (MH) package (28- and 44-pin). Figure 1. Logic diagram Table 1. Signal names

2 Maximum ratings

program and other relevant quality documents. Table 2. Absolute maximum ratings Caution: Do NOT wave solder SOIC to avoid damaging SNAPHAT sockets.

  1. Only the M4T32-BR12SH is available in industrial temperature (grade 6).

3 DC and AC parameters

the measurement conditions when using the quoted parameters. Table 3. Operating and AC measurement conditions

4 Mechanical information

in accordance with MIL-STD-883, method 2007.2, condition A. be extracted and re-inserted once in its lifetime. Figure 2. SNAPHAT

M4T28-BR12SH, M4T32-BR12SH Mechanical information

4.1 Battery characteristics

Figure 3 on page 10 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. Note: These batteries contain no mercury (Hg), cadmium (Cd), or lead (Pb).

4.2 UL recognition

The M4Txx-BR12SH has been recognized by Underwriters Laboratories under their Component Recognition Program and carries U.L. File Number E89556.

4.3 Battery life

For information on data retention life and battery storage life, please refer to the application note AN1012.

4.4 General notes

ST has conducted experiments using a manual press which determined that if approximately 60 pounds of force is applied to the top of the SNAPHAT ®, battery damage and/or die cracks could be induced. As Figure 2 on page 8 specifies, only an average of less than 13 force-pounds is required for proper insertion. We recommend that no more than 40 pounds of force be applied during SNAPHAT insertion. If a manual press in employed, it is very important that it be calibrated such that it cannot exceed this limit. To remove the SNAPHAT top for replacement, a DIP/IC extractor tool should be used (see Figure 4). The SNAPHAP top should be grabbed by the narrow end to avoid bending the pins. Caution: To avoid draining battery do NOT place SNAPHAT pins into conductive foam. Caution: To avoid damaging SNAPHAT sockets do NOT wave solder SOIC.

5 Package mechanical data

conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Figure 5. SH – 4-pin SNAPHAT Note: Drawing is not to scale. Table 4. SH – 4-pin SNAPHAT ® housing for 48 mAh battery & crystal, package

Figure 6. SH – 4-pin SNAPHAT ® housing for 120 mAh battery & crystal, package Note: Drawing is not to scale. Table 5. SH – 4-pin SNAPHAT ® housing for 120 mAh battery & crystal, package

6 Part numbering

Table 6. Ordering information scheme of this device, please contact the ST sales office nearest to you.

7 Environmental information

Figure 7. Recycling symbols button cell battery fully encapsulated in the final product. and local/national disposal and recycling regulations. compliance statements and waste recycling. Go to www.st.com/nvram, then select "Lithium Battery Recycling" from "Related Topics".

8 Revision history

Table 7. Document revision history mechanical data, Table 6; added Section 7: Environmental information.