M41ST87WMX6TR STMicroelectronics, M41ST87WMX6TR Datasheet - Page 5

IC SUPERVISOR RTC 160X8 28-SOIC

M41ST87WMX6TR

Manufacturer Part Number
M41ST87WMX6TR
Description
IC SUPERVISOR RTC 160X8 28-SOIC
Manufacturer
STMicroelectronics
Type
Clock/Calendar/Supervisorr
Datasheets

Specifications of M41ST87WMX6TR

Memory Size
160B
Time Format
HH:MM:SS:hh (24 hr)
Date Format
YY-MM-DD-dd
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-SOIC, 28-SOH (8.48mm Width)
Bus Type
Serial (2-Wire, I2C)
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
2.7V
Operating Temperature Classification
Industrial
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Pin Count
28
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-6457-2
M41ST87WMX6TR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M41ST87WMX6TR
Manufacturer:
MBI
Quantity:
12 000
Part Number:
M41ST87WMX6TR
Manufacturer:
STM
Quantity:
117
Part Number:
M41ST87WMX6TR
Manufacturer:
ST
Quantity:
1 000
M41ST87Y, M41ST87W
List of figures
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Figure 28.
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Figure 30.
Figure 31.
Figure 32.
Figure 33.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
28-pin, 300 mil SOIC (MX) connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
20-pin, SSOP (SS) connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Serial bus data transfer sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Acknowledgement sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Bus timing requirements sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Slave address location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Alternate READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
WRITE mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
WRITE cycle timing: RTC & external SRAM control signals. . . . . . . . . . . . . . . . . . . . . . . . 17
Tamper detect connection options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Basic tamper detect options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Tamper detect output options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Tamper detect sampling options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Tamper current options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Tamper output timing (with CLR1
package only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
RAM clear hardware hookup (SOX28 MX package only). . . . . . . . . . . . . . . . . . . . . . . . . . 25
Low-pass filter implementation for noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Calibration waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Alarm interrupt reset waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Backup mode alarm waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
RSTIN1 & RSTIN2 timing waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
AC testing input/output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Power down/up mode AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
SOX28 – 28-lead plastic small outline, 300 mils, embedded crystal outline. . . . . . . . . . . . 47
SSOP20 – 20-lead, shrink, small outline package outline . . . . . . . . . . . . . . . . . . . . . . . . . 48
Carrier tape for SOX28 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Carrier tape for SSOP20 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Reel schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Doc ID 9497 Rev 9
EXT
or CLR2
EXT
= '1') - available in SOX28 (MX)
List of figures
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