M41ST87WSS6F STMicroelectronics, M41ST87WSS6F Datasheet - Page 20

• Manufacturer Part Number: M41ST87WSS6F
• Description: IC SUPERVISOR RTC/NVRAM 20-SSOP
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Supervisorr

Specifications of M41ST87WSS6F

• 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: 20-SSOP
• Function: Clock, Timestamp, Timekeeper, Watchdog, Alarm, Calendar, Timer, Timer Interrupt
• Rtc Memory Size: 1280 bit
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Supply Current: 500 nA
• Clock Format: Ss
• Clock Ic Type: RTC
• Interface Type: I2C
• Memory Configuration: 128 X 8
• Supply Voltage Range: 2.7V To 3.6V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10616-2

Operating modes
Figure 14. Tamper detect connection options
Note:
1. If the CLRX
2. If the CLRX
3. Optional external resistor to V
Table 3.
1. No battery current drawn during battery backup.
20/54
Option
NORMALLY
NORMALLY
(TCM X = 1)
(TCM X = 0)
CLOSED
IV
III
II
OPEN
I
EXT
EXT
These options are summarized in
Tamper detection truth table
bit is set, a second tamper to V
bit is set, a second tamper to V
Normally open/tamper to GND
Normally open/tamper to V
Normally closed/tamper to GND
Normally closed/tamper to V
III.
I.
V OUT (2)
TP IN
TCHI/TCLO = 1
CC
allows the user to bypass sampling when power is “on.”
TAMPER LO
(TPM X = 0)
TP IN
Mode
OUT
OUT
OUT
OUT
(1)
(1)
Doc ID 9497 Rev 9
TCHI/TCLO = 0
(TPM2 = '1') during t
(TPM2 = '1') will trigger automatically.
Table
3.
IV.
II.
CLR
V CC
(3)
will not be detected.
TCHI/TCLO = 1
TCM
TAMPER HI
(TPM X = 1)
1
1
0
0
V OUT
TP IN
X
M41ST87Y, M41ST87W
(1)
V OUT (Int)
TCHI/TCLO = 0
TPM
0
1
0
1
AI07075
X