M4T28-BR12SH1 STMicroelectronics, M4T28-BR12SH1 Datasheet - Page 6

• Manufacturer Part Number: M4T28-BR12SH1
• Description: IC SNAPHAT BATT/CRYSTAL 28-SOIC
• Manufacturer: STMicroelectronics

Specifications of M4T28-BR12SH1

• Battery Type: Li-(CF)
• Operating Supply Voltage: 0 V to 2.8 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Package / Case: SOIC-28
• Mounting Style: SMD/SMT
• Ic Function: Timekeeper (Battery & Crystal)
• Supply Voltage Range: 2.8V
• Operating Temperature Range: 0°C To +70°C
• Digital Ic Case Style: SNAPHAT
• No. Of Pins: 28
• Termination Type: SMD
• Rohs Compliant: Yes
• Filter Terminals: SMD
• External Depth: 14.99mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3686-5

M4T28-BR12SH, M4T32-BR12SH
Battery Characteristics
Figure 4 illustrates the lithium coin cell discharge
rate for a given load. This demonstrates the char-
acteristically flat voltage level supplied by the bat-
tery until very near the end of its life. These
discharge levels have been greatly accelerated in
comparison to the normal, actual usage.
UL Recognition
The M4Txx-BR12SH has been recognized by Un-
derwriters Laboratories under their Component
Recognition Program and carries U.L. File Num-
ber E89556.
Figure 4. Battery Discharge Rates
Figure 5. DIP Extractor Tool
6/11
3.5
3.0
2.5
2.0
1.5
1.0
3.5
3.0
2.5
2.0
1.5
1.0
0
0
LOAD CHARACTERISTICS
LOAD CHARACTERISTICS
15k
200 400 600
15k
1000
30k
30k
2000
AI02527
800 1000
Duration (hrs.)
Duration (hrs.)
50k
3000
(A)
(B)
1200
Battery Life
For information on Data Retention Life and Battery
Storage Life, please refer to the Application Note
AN1012.
General Notes
To remove the SNAPHAT® top for replacement, a
DIP/IC extractor tool should be used (see Figure
5). 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 in a conductive foam.
4000
1400
1600 1800
Temp: 20˚C
Temp: 20˚C
5000
100k
100k
2000
6000
AI02519
BR1225
BR1632