M41T81SM6F STMicroelectronics, M41T81SM6F Datasheet - Page 25

• Manufacturer Part Number: M41T81SM6F
• Description: IC RTC SERIAL W/ALARM 8SOIC
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T81SM6F

• Memory Size: 20B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Function: Clock/Calendar/Alarm/Timer Interrupt
• Rtc Memory Size: 20 Byte
• Supply Voltage (max): 5.5 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 (I2C)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4684-2

M41T81S
Table 9.
1. Valid for ambient operating temperature: T
2. For IRQ/FT/OUT/SQW pin (open drain)
3. STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.
4. For rechargeable back-up, V
Table 10.
1. Externally supplied if using the SO8 package. STMicroelectronics recommends the KDS DT-38:
2. Load capacitors are integrated within the M41T81S. Circuit board layout considerations for the 32.768 kHz
3. For applications requiring back-up supply operation below 2.5 V, R
Figure 16. Power down/up mode AC waveforms
V
Sym
I
I
V
BAT
I
V
I
CC1
CC2
V
1TA/1TC252E127, Tuning Fork Type (thru-hole) or the DMX-26S: 1TJS125FH2A212, (SMD) quartz
crystal for industrial temperature operations. KDS can be contacted at [e-mail] or
http://www.kdsj.co.jp for further information on this crystal type.
crystal of minimum trace lengths and isolation from RF generating signals should be taken into account.
BAT
I
Sym
LO
V CC
V SO
SDA
SCL
LI
OL
IH
R
IL
C
f
O
(3)
S
L
Input leakage current
Output leakage current
Supply current
Supply current (standby)
Input low voltage
Input high voltage
Output low voltage
Output low voltage
(open drain)
Pull-up supply voltage
(open drain)
Backup supply voltage
Battery supply current
Resonant frequency
Series resistance
Load capacitance
DC characteristics
Crystal electrical characteristics
tPD
Parameter
(2)
Parameter
BAT
(max) may be considered to be V
Doc ID 10773 Rev 6
(1)and(2)
Oscillator ON, V
Switch freq = 400 kHz
T
A
A
0 V ≤ V
IRQ/OUT/FT/SQW
Test condition
= –40 to 85 °C; V
0 V ≤ V
= 25 °C, V
≥ V
≤ V
I
I
SCL = 0 Hz
OL
OL
DON'T CARE
All inputs
CC
SS
= 3.0 mA
= 10 mA
OUT
IN
+ 0.2 V
– 0.2 V
CC
≤ V
BAT
≤ V
= 0 V
CC
(1)
CC
CC
= 3 V
= 2.7 to 5.5 V (except where noted).
CC
S
(max) should be considered 40 kΩ.
.
Min
-
-
-
0.7V
–0.3
Min
2.0
CC
32.768
DC and AC parameters
12.5
Typ
Typ
0.6
trec
60
Max
0.3V
V
3.5
Max
400
100
(3)
0.3
0.4
0.4
5.5
CC
±1
±1
1
(4)
CC
+
Units
AI00596
kHz
kΩ
Unit
pF
25/32
µA
µA
µA
µA
µA
V
V
V
V
V
V