m41t80 STMicroelectronics, m41t80 Datasheet - Page 20

• Manufacturer Part Number: m41t80
• Description: Serial Access Real Time Clock With Alarm
• Manufacturer: STMicroelectronics

DC and AC parameters
Table 10.
1. Valid for Ambient Operating Temperature: T
2. At 25°C.
3. For IRQ/FT/OUT, RST, and 32kHz pins (Open Drain)
Table 11.
1. Externally supplied if using the SO8 package. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127, Tuning
2. Load capacitors are integrated within the M41T80. Circuit board layout considerations for the 32.768kHz crystal of
20/25
Symbol
I
CC2
I
V
V
I
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.
minimum trace lengths and isolation from RF generating signals should be taken into account.
CC1
V
I
LO
OL
LI
IH
IL
(2)
Sym
R
C
f
O
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)
DC characteristics
Crystal electrical characteristics
Parameter
Resonant frequency
Series resistance
Load capacitance
(3)
Parameter
Switch freq (SCL) = 0Hz
All inputs = V
(1) (2)
Switch freq (SCL) = 400kHz
A
= –40 to 85°C; V
IRQ/out/SQW, F
Test condition
0V V
CC
0V V
I
I
OL
OL
– 0.2V
= 3.0mA
= 10mA
OUT
Min
IN
V
V
SQWE = 1
SQWE = 0
CC
32KE = 1
32KE = 0
CC
(1)
32k
CC
and
or
= 2.0 to 5.5V (except where noted).
32.768
12.5
Typ
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
0.7V
–0.3
Min
CC
Max
60
Typ
1.8
1.5
V
0.3V
CC
Max
200
3.0
2.4
0.4
0.4
5.5
±1
±1
30
35
31
+ 0.3
CC
Units
kHz
k
pF
M41T80
Unit
V
V
V
V
V
A
A
A
A
A
A
A
A