M41T66Q6F STMicroelectronics, M41T66Q6F Datasheet - Page 26

• Manufacturer Part Number: M41T66Q6F
• Description: IC RTC SERIAL W/ALARM 16-QFN
• Manufacturer: STMicroelectronics
• Type: Clock/Calendar/Alarmr

Specifications of M41T66Q6F

• Memory Size: 16B
• Time Format: HH:MM:SS:hh (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.5 V ~ 4.4 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8377-2

DC and AC parameters
26/33
Table 11.
1. Externally supplied if using the QFN16 package. STMicroelectronics recommends the Citizen CFS-145
2. Load capacitors are integrated within the M41T66. Circuit board layout considerations for the 32.768 kHz
3. Guaranteed by design.
4. R
5. External capactors must be added to achieve better clock accuracy.
Table 12.
1. Reference value. T
Figure 16. Bus timing requirements sequence
Symbol
V
t
(1.5 x 5 mm) and the KDS DT-38 (3 x 8 mm) for thru-hole, or the KDS DMX-26S
(3.2 x 8 mm) for surface-mount, tuning fork-type quartz crystals. KDS can be contacted at
http://www.kds.info/index_en.htm. Citizen can be contacted at http://www.citizencrystal.com.
crystal of minimum trace lengths and isolation from RF generating signals should be taken into account.
STA
C
C
STA
Sym
S (max)
g
d
R
C
f
O
S
L
Oscillator start voltage
Oscillator start time
XIN
XOUT
IC-to-IC frequency variation
= 65 kΩ for T
Crystal electrical characteristics
Oscillator characteristics
Resonant frequency
Series resistance (T
Load capacitance
A
Parameter
= 25°C, V
A
= –40 to 85°C and oscillator startup at 1.7 V.
Parameter
CC
= 3.0 V, CMJ-145 (C
A
= –40 to 70°C)
(1)(2)
(1)
V
V
Conditions
CC
CC
at 25°C
at 25°C
= 1.6 V
= 3.0 V
L
= 6 pF, 32,768 Hz) manufactured by Citizen.
Min
Min
–10
1.6
7-12.5
32.768
Typ
6
Typ
500
12
12
(5)
75
Max
Max
+10
(3)(4)
1
M41T66
Units
kHz
Unit
ppm
kΩ
pF
ms
pF
pF
V
s