M4T28-BR12SH1 STMicroelectronics, M4T28-BR12SH1 Datasheet - Page 2
![IC SNAPHAT BATT/CRYSTAL 28-SOIC](/photos/6/57/65729/m4t28-br12sh1_sml.jpg)
M4T28-BR12SH1
Manufacturer Part Number
M4T28-BR12SH1
Description
IC SNAPHAT BATT/CRYSTAL 28-SOIC
Manufacturer
STMicroelectronics
Datasheets
1.M4T28-BR12SH1.pdf
(29 pages)
2.M4T32-BR12SH1.pdf
(16 pages)
3.M4T28-BR12SH1.pdf
(12 pages)
4.M4T28-BR12SH1.pdf
(11 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
M4T28-BR12SH1
Manufacturer:
ALLEGRO
Quantity:
301
Part Number:
M4T28-BR12SH1
Manufacturer:
ST
Quantity:
20 000
Contents
Contents
1
2
3
4
5
6
7
8
9
2/29
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
2.2
2.3
Clock operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1
3.2
3.3
3.4
3.5
3.6
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Setting the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Century bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
READ mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
WRITE mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Data retention mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Reading the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Stopping and starting the oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Calibrating the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
V
CC
noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . 17
Doc ID 6845 Rev 8
M48T35AV