M41ST85WMX6 STMicroelectronics, M41ST85WMX6 Datasheet - Page 24

• Manufacturer Part Number: M41ST85WMX6
• Description: IC RTC 3.0V NVRAM 28SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Supervisorr

Specifications of M41ST85WMX6

• Memory Size: 64B
• 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)
• Function: Clock/Calendar/Supervisor/Alarm
• Rtc Memory Size: 64 Byte
• 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 (2-Wire, I2C)
• Memory Configuration: 64 X 8
• Nvram Features: RTC, Internal Battery, XTAL
• Interface Type: I2C, Serial, 2-Wire
• Supply Voltage Range: 2.7V To 3.6V
• Memory Case Style: SO
• No. Of Pins: 28
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2805-5

M41ST85Y, M41ST85W
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-
Table 9. DC and AC Measurement Conditions
Note: Output High Z is defined as the point where data is no longer driven.
Figure 20. AC Testing Input/Output Waveforms
Note: 50pF for M41ST85W.
Table 10. Capacitance
Note: 1. Effective capacitance measured with power supply at 5V. Sampled only, not 100% tested.
24/34
V
Ambient Operating Temperature
Load Capacitance (C
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
CC
0.8V CC
0.2V CC
Symbol
C
Supply Voltage
2. At 25°C, f = 1MHz.
3. Outputs are deselected.
OUT
C
t
LP
IN
(3)
Input Capacitance
Output Capacitance
Low-pass filter input time constant (SDA and SCL)
L
)
Parameter
Parameter
0.7V CC
0.3V CC
AI02568
(1,2)
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.
0.2 to 0.8V
0.3 to 0.7V
–40 to 85°C
M41ST85Y
4.5 to 5.5V
100pF
50ns
Min
CC
CC
Max
10
50
7
0.2 to 0.8V
0.3 to 0.7V
M41ST85W
–40 to 85°C
2.7 to 3.6V
50pF
50ns
CC
CC
Unit
pF
pF
ns