M41ST85WMX6 STMicroelectronics, M41ST85WMX6 Datasheet - Page 32
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M41ST85WMX6
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M41ST85WMX6
Manufacturer:
ST
Quantity:
20 000
Part Number:
M41ST85WMX6TR
Manufacturer:
ST
Quantity:
20 000
DC and AC parameters
Figure 19. Bus timing requirements sequence
Table 12.
1. Valid for ambient operating temperature: T
2. Transmitter must internally provide a hold time to bridge the undefined region (300 ns max) of the falling edge of SCL.
32/41
t
Symbol
HD:DAT
t
t
t
t
SU:STO
HD:STA
SU:DAT
SU:STA
t
t
t
f
t
EXPD
HIGH
LOW
SCL
BUF
t
t
R
F
(2)
SDA
SCL
SCL clock frequency
Time the bus must be free before a new transmission can start
EX to E
SDA and SCL fall time
Data hold time
START condition hold time (after this period the first clock pulse is generated)
Clock high period
Clock low period
SDA and SCL rise time
Data setup time
START condition setup time (only relevant for a repeated start condition)
STOP condition setup time
AC characteristics
tBUF
CON
P
propagation delay
S
tHD:STA
tR
A
= –40 to 85°C; V
Parameter
tLOW
tHIGH
tF
CC
(1)
= 2.7 to 3.6 V (except where otherwise noted).
tHD:DAT
tSU:DAT
SR
tSU:STA
tHD:STA
Min
600
600
100
600
600
1.3
1.3
0
0
P
AI00589
M41ST85W
tSU:STO
Max
400
300
300
15
Unit
kHz
µs
ns
ns
µs
ns
ns
µs
ns
ns
ns
ns