M41T56_07 STMICROELECTRONICS [STMicroelectronics], M41T56_07 Datasheet - Page 18

• Manufacturer Part Number: M41T56_07
• Description: Serial real-time clock with 56 bytes NVRAM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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Table 7.
1. Valid for ambient operating temperature: T
2. STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.
Table 8.
1. These values are externally supplied for the SO8 package. STMicroelectronics recommends the KDS DT-
2. Load capacitors are integrated within the M41T56. Circuit board layout considerations for the 32.768 kHz
Figure 14. Power down/up mode AC waveforms
Symbol
V
Symbol
I
I
V
BAT
I
V
I
CC1
CC2
V
38: 1TA/1TC252E127, Tuning Fork Type (thru-hole) or the DMX-26S: 1TJS125FH2A212, (SMD) quartz
crystal for industrial temperature operations. For contact information on this crystal type, see
References on page
crystal of minimum trace lengths and isolation from RF generating signals should be taken into account.
BAT
I
LO
R
LI
OL
C
V CC
V PFD
V SO
SDA
SCL
I BAT
IH
f
IL
O
S
L
(2)
Input leakage current
Output leakage current
Supply current
Supply current (standby)
Input low voltage
Input high voltage
Output low voltage
Battery supply voltage
Battery supply current
Resonant frequency
Series resistance
Load capacitance
DC characteristics
Crystal electrical characteristics
tPD
Parameter
23.
Parameter
tFB
(1)(2)
Switch frequency = 100kHz
oscillator ON, V
SCL, SDA = V
I
OL
A
T
DATA RETENTION TIME
A
= –40 to 85°C; V
Test condition
0V ≤ V
= 5mA, V
0V ≤ V
= 25°C, V
OUT
IN
≤ V
CC
CC
CC
≤ V
BAT
Min
= 4.5V
CC
– 0.3V
= 0V,
CC
CC
(1)
= 3V
= 4.5 to 5.5V (except where noted).
32.768
–0.3
tRB
Min
2.5
12.5
Typ
3
Typ
100
450
3
Max
V
60
CC
tREC
Max
Section 8:
300
550
1.5
0.4
3.5
±1
±1
+ 0.8
AI00595
Unit
kHz
kΩ
pF
Unit
µA
µA
µA
µA
nA
V
V
V
V