M4T32-BR12SH6TR [STMICROELECTRONICS]
TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL); TIMEKEEPER SNAPHAT （ BATTERY水晶）
| 型号： | M4T32-BR12SH6TR |
| 厂家： | 
ST |
| 描述： | TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) |
| 文件： | 总12页 (文件大小：173K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M4T28-BR12SH
M4T32-BR12SH
®
®
TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL)
FEATURES SUMMARY
■ PROVIDES BATTERY BACKUP POWER FOR
Figure 1. SNAPHAT Top Package
®
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-
SNAPHAT (SH)
Battery/Crystal
MOUNTED SNAPHAT SOIC
■ CHOICE OF BATTERY CAPACITIES:
– M4T28-BR12SH = 48mAh
– M4T32-BR12SH = 120mAh
■ KEYED INSERTION TO INSURE PROPER
ASSEMBLY
■ REMOVABLE FOR REPLACEMENT and
PROPER DISPOSAL
■ Pb-FREE PACKAGE
■ AVAILABLE IN TUBES OR TAPE & REEL
March 2003
1/12
Rev. 2.5
M4T28-BR12SH, M4T32-BR12SH
TABLE OF CONTENTS
SUMMARY DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Logic Diagram (Figure 2.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Signal Names (Table 1.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Absolute Maximum Ratings (Table 2.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operating and AC Measurement Conditions (Table 3.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MECHANICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SNAPHAT Insertion/Extraction Forces (Figure 3.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Battery Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
UL Recognition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Battery Life. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Battery Discharge Rates (Figure 4.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIP Extractor Tool (Figure 5.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PACKAGE MECHANICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2/12
M4T28-BR12SH, M4T32-BR12SH
SUMMARY DESCRIPTION
®
The M4TXX-BR12SH SNAPHAT top is a detach-
able lithium power source for ST’s non-volatile
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 tem-
peratures of the surface mount process.
®
TIMEKEEPER surface-mount SOIC (MH) pack-
age (28- and 44-pin).
Figure 2. Logic Diagram
Table 1. Signal Names
X1
X2
V
Crystal Input
Crystal Output
Negative Voltage
Positive Voltage
X1
X2
BAT–
V
BAT+
SNAPHAT
V
V
BAT+
BAT–
AI02528
3/12
M4T28-BR12SH, M4T32-BR12SH
MAXIMUM RATING
Stressing the device above the rating listed in the
“Absolute Maximum Ratings” table may cause
permanent damage to the device. These are
stress ratings only and operation of the device at
these or any other conditions above those indicat-
ed in the Operating sections of this specification is
not implied. Exposure to Absolute Maximum Rat-
ing conditions for extended periods may affect de-
vice
reliability.
Refer
also
to
the
STMicroelectronics SURE Program and other rel-
evant quality documents.
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Ambient Operating Temperature
Storage Temperature (V Off, Oscillator Off)
Value
0 to 70
Unit
°C
Grade 1
T
A
(1)
–40 to 85
°C
Grade 6
T
–40 to 85
°C
STG
CC
Note: 1. Only the M4T32-BR12SH is available in Industrial temperature (Grade 6).
CAUTION: Do NOT wave solder SOIC to avoid damaging SNAPHAT sockets.
DC AND AC PARAMETERS
This section summarizes the operating and mea-
surement conditions, as well as the DC and AC
characteristics of the device. The parameters in
the following DC and AC Characteristic tables are
derived from tests performed under the Measure-
ment Conditions listed in the relevant tables. De-
signers should check that the operating conditions
in their projects match the measurement condi-
tions when using the quoted parameters.
Table 3. Operating and AC Measurement Conditions
Parameter
M4T28-BR12SH
M4T32-BR12SH
Unit
V
Nominal Battery Voltage (V
)
2.8
48
2.8
120
CC
Nominal Battery Capacity
Battery Chemistry
mAh
Li(CF)
12.5
Li(CF)
12.5
Crystal Load Capacitance (C )
pF
L
Nominal Crystal Frequency
Crystal Accuracy (@ 25°C)
32.768
± 35
32.768
± 35
kHz
ppm
4/12
M4T28-BR12SH, M4T32-BR12SH
MECHANICAL INFORMATION
Electrical connection to the SOIC is made through
four pins that connect to the four press fitted sock-
ets 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 resis-
assembly can sustain shock levels in excess of
100 g without separating. This package also pass-
es variable frequency testing in accordance with
MIL-STD-883, method 2007.2, condition A.
Figure 3 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 need to be extracted and re-
inserted once in its lifetime.
®
tance. The SNAPHAT top also incorporates four
molded-in retaining clips which hold onto the ends
of the SOIC insuring mechanical and electrical
connection even under severe mechanical shock
and vibration. The combined SOIC and SNAPHAT
Figure 3. SNAPHAT Insertion/Extraction Forces
15
12.5
10
7.5
5
Average Insertion
Average Extraction
2.5
0
1
2
3
4
5
6
7
8
9
10
Number of Extractions
AI02526
5/12
M4T28-BR12SH, M4T32-BR12SH
Battery Characteristics
Figure 4, page 7 illustrates the lithium coin cell dis-
charge 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.
pounds of force is applied to the top of the
SNAPHAT , battery damage and/or die cracks
could be induced. As Figure 3, page 5 specifies,
only an average of less than 13 force-pounds is re-
quired for proper insertion. We recommend that no
more than 40 pounds of force be applied during
SNAPHAT insertion.
®
Note: These batteries contain no Mercury (Hg),
Cadmium (Cd), or Lead (Pb).
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.
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
5). The SNAPHAP top should be grabbed by the
narrow end to avoid bending the pins.
Battery Life
Caution: To avoid draining battery do NOT place
SNAPHAT pins into conductive foam.
Caution: To avoid damaging SNAPHAT sockets
do NOT wave solder SOIC.
For battery disposal information, see on the web at
www.rayovac.com.
For information on Data Retention Life and Battery
Storage Life, please refer to the Application Note
AN1012.
General Notes
ST has conducted experiments using a manual
press which determined that if approximately 60
6/12
M4T28-BR12SH, M4T32-BR12SH
Figure 4. Battery Discharge Rates
LOAD CHARACTERISTICS
Temp: 20˚C
3.5
3.0
2.5
2.0
1.5
1.0
BR1225
15kΩ 30kΩ
100kΩ
0
200 400 600 800 1000 1200 1400 1600 1800 2000
Duration (hrs.)
(A)
LOAD CHARACTERISTICS
Temp: 20˚C
3.5
3.0
2.5
2.0
1.5
1.0
BR1632
15kΩ
30kΩ
50kΩ
100kΩ
0
1000
2000
3000
4000
5000
6000
Duration (hrs.)
(B)
AI02519
Figure 5. DIP Extractor Tool
AI02527
7/12
M4T28-BR12SH, M4T32-BR12SH
PART NUMBERING
Table 4. Ordering Information Scheme
Example:
M4T
28-BR12
SH
1
TR
Device Type
M4T
Battery Voltage and Capacity
28-BR12 = BR1225, 3V, 48mAh
32-BR12 = BR1632, 3V, 120mAh
Package
®
SH = SNAPHAT
Temperature Range
1 = 0 to 70°C
6 = –40 to 85°C (M4T32-BR12SH only)
Shipping Method
blank = Tubes
TR = Tape & Reel
For a list of available options (e.g., Speed, Package) or for further information on any aspect of this device,
please contact the ST Sales Office nearest to you.
8/12
M4T28-BR12SH, M4T32-BR12SH
PACKAGE MECHANICAL INFORMATION
Figure 6. SH – 4-pin SNAPHAT Housing for 48mAh Battery & Crystal, Package Outline
A2
A1
A
A3
L
eA
D
B
eB
E
SHTK-A
Note: Drawing is not to scale.
Table 5. SH – 4-pin SNAPHAT Housing for 48mAh Battery & Crystal, Package Mechanical Data
mm
Min
inches
Min
Symb
Typ
Max
9.78
7.24
6.99
0.38
0.56
21.84
14.99
15.95
3.61
2.29
Typ
Max
A
A1
A2
A3
B
0.385
0.285
0.275
0.015
0.022
0.860
0.590
0.628
0.142
0.090
6.73
6.48
0.265
0.255
0.46
21.21
14.22
15.55
3.20
0.018
0.835
0.560
0.612
0.126
0.080
D
E
eA
eB
L
2.03
9/12
M4T28-BR12SH, M4T32-BR12SH
Figure 7. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Outline
A2
A1
A
A3
L
eA
D
B
eB
E
SHTK-A
Note: Drawing is not to scale.
Table 6. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Mechanical Data
mm
Min
inches
Min
Symb
Typ
Max
10.54
8.51
Typ
Max
A
A1
A2
A3
B
0.415
0.335
0.315
0.015
0.022
0.860
0.710
0.628
0.142
0.090
8.00
7.24
0.315
0.285
8.00
0.38
0.46
21.21
17.27
15.55
3.20
0.56
0.018
0.835
0.680
0.612
0.126
0.080
D
21.84
18.03
15.95
3.61
E
eA
eB
L
2.03
2.29
10/12
M4T28-BR12SH, M4T32-BR12SH
REVISION HISTORY
Table 7. Document Revision History
Date
Rev. #
1.0
Revision Details
November 1999
01-Mar-01
First Issue
2.0
Reformatted
04-Jun-01
2.1
Basic textual changes from reformatting activity
Changes references to “SUPERVISOR” from “Controller;” clarify temperature
characteristics
10-Jul-01
21-Jan-02
2.2
2.3
Change to include Crystal Accuracy (Table 3); add text for SNAPHAT insertion force
tolerance and battery characteristics note
20-Aug-02
14-Mar-03
2.4
2.5
Updated Insertion/Extraction Data (Figure 3)
Add Pb-free note on page 1
11/12
M4T28-BR12SH, M4T32-BR12SH
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is registered trademark of STMicroelectronics
All other names are the property of their respective owners.
© 2003 STMicroelectronics - All Rights Reserved
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