M41ST87WSS6F STMicroelectronics, M41ST87WSS6F Datasheet - Page 25

• 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

M41ST87Y, M41ST87W
Table 5.
1. With input capacitance = 70 pF and resistance = 50 Ω.
2. If the OF bit is set, t
Figure 20. RAM clear hardware hookup (SOX28 MX package only)
1. Most inverting charge pumps drive OUT to ground when device shut down is enabled (SHDN = logic low). Therefore, an n-
2. In order to avoid turning on an on-chip parasitic diode when driving V
Symbol
t
CLRD
channel enhancement mode MOSFET should be used to isolate the OUT pin from the V
MOSFET should be used to isolate the V
t
CLR
(1)
Tamper detect timing
Pushbutton
Tamper RAM clear ext delay
V
CLRD
Reset
IN
Regulator
Tamper clear timing
Inhibit
5V
(min) = 0.5 ms.
Parameter
V
CC
OUT
V
EX
SCL
WDI
RSTIN1
RSTIN2
PFI
PFI
V
TP1
TP2
V
CC
SS
BAT
pin from the negative voltage generated by the inverting charge pump.
1
2
IN
IN
M41ST87Y/W
Doc ID 9497 Rev 9
CLRPW
IRQ/OUT
SQW/FT
X
TP
1
0
0
1
1
PFO
PFO
E
V
SDA
RST
F
CON
OUT
CLR
32k
1
2
CLRPW
OUT
X
0
0
1
0
1
CAP+ CAP–
SHDN
IN
Inverting
Charge
negative, a p-channel enhancement mode
Pump
To RST
To LED Display
To NMI
To INT
To 32kHz
OUT
1.0
(2)
Min
(2)
OUT
Negative Output
(1)
of the M41ST87.
(–1 x V IN )
Typ
V
E
1.5
16
CC
1
4
8
Low-Power
SRAM
AI07804
Operating modes
Max
2.0
Unit
ms
s
s
s
s
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