m41st84w STMicroelectronics, m41st84w Datasheet - Page 24

• Manufacturer Part Number: m41st84w
• Description: 3.0/3.3v I 2c Serial Rtc With Supervisory Functions
• Manufacturer: STMicroelectronics

M41ST84W
Table 12. DC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
Table 13. Crystal Electrical Characteristics (Externally Supplied)
Note: 1. Load capacitors are integrated within the M41ST84W. Circuit board layout considerations for the 32.768kHz crystal of minimum
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I
V
Sym
V
I
I
I
V
LO
V
V
I
V
LI
V
CC1
CC2
V
BAT
PFD
BAT
OH
PFI
OL
SO
IH
(2)
IL
Symbol
(3)
2. RSTIN internally pulled-up to V
3. Outputs deselected.
4. For PFO and SQW pins (CMOS).
5. For IRQ/FT/OUT, RST pins (Open Drain): if pulled-up to supply other than V
6. For rechargeable back-up, V
2. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127, Tuning Fork Type (thru-hole) or the DMX-26S:
R
C
f
0
V
trace lengths and isolation from RF generating signals should be taken into account.
1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS can be contacted at [e-mail] or ht-
tp://www.kdsj.co.jp for further information on this crystal type.
S
L
Battery Current OSC ON
Battery Current OSC OFF
Supply Current
Supply Current (Standby)
Input Leakage Current
Input Leakage Current (PFI)
Output Leakage Current
Input High Voltage
Input Low Voltage
Battery Voltage
Output High Voltage
Output Low Voltage
Output Low Voltage (Open Drain)
Pull-up Supply Voltage (Open Drain)
Power Fail Deselect
PFI Input Threshold
PFI Hysteresis
Battery Back-up Switchover
CC
= 0V (during battery back-up mode).
Resonant Frequency
Series Resistance
Load Capacitance
Parameter
(4)
BAT
CC
Parameter
(max) may be considered V
through 100K resistor. WDI internally pulled-down to V
(5)
A
(1,2)
= –40 to 85°C; V
SCL, SDA = V
T
A
RST, IRQ/FT/OUT
Test Condition
0V
0V
= 25°C, V
or V
I
V
OH
I
I
f = 400kHz
OL
OL
PFI Rising
V
CC
BAT
V
= –1.0mA
SS
= 3.0mA
V
= 10mA
OUT
= 3V(W)
IN
CC
= 3V
+ 0.3V
CC
.
CC
CC
V
= 2.7 to 3.6V (except where noted).
V
CC
= 0V,
– 0.3V
CC
(1)
32.768
CC
12.5
Typ
, this supply must be equal to, or less than 3.0V when
0.7V
1.225
–0.3
2.55
Min
–25
2.5
2.4
CC
Min
SS
M41ST84W
through 100K
1.250
2.60
Typ
400
3.0
2.5
50
20
2
Max
50
V
0.3V
CC
1.275
3.5
Max
0.75
0.50
2.70
500
0.4
0.4
3.6
resistor.
±1
25
±1
70
+ 0.3
(6)
CC
Unit
kHz
k
pF
Unit
mA
mA
mV
nA
nA
µA
nA
µA
V
V
V
V
V
V
V
V
V
V