M41T256YMT7 STMicroelectronics, M41T256YMT7 Datasheet - Page 24

• Manufacturer Part Number: M41T256YMT7
• Description: Real Time Clock Serial 256K (32Kx8)
• Manufacturer: STMicroelectronics

Specifications of M41T256YMT7

• Function: Clock, Calendar
• Rtc Memory Size: 32768 B
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 25 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Package / Case: SO-44
• Time Format: HH:MM:SS:hh
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 8.
1. Valid for ambient operating temperature: T
2. Outputs deselected.
3. For RST and FT pin (open drain).
Table 9.
1. Load capacitors are integrated within the M41T256Y. Circuit board layout considerations for the 32.768kHz crystal of
24/30
I
V
Sym
V
V
R
I
I
V
V
I
LO
V
V
CC1
CC2
V
BAT
I
PFD
BAT
IHB
OH
SO
SW
LI
OL
IH
minimum trace lengths and isolation from RF generating signals should be taken into account.
IL
Symbol
(2)
R
C
f
0
Battery current OSC ON
Battery current OSC OFF
Supply current
Supply current (standby)
Input leakage current
Output leakage current
Input high voltage
Input high voltage in battery
back-up for tamper pin
Input low voltage
Battery voltage
Output high voltage
Output low voltage
Output low voltage (open
drain)
Power fail deselect
Battery back-up switchover
Switch resistance on tamper
pin
S
L
(3)
DC characteristics
Crystal electrical characteristics (externally supplied)
Parameter
Resonant frequency
Series resistance
Load capacitance
Parameter
T
A
A
= 25°C, V
= –25 to 70°C; V
SCL, SDA = V
(1)
Test condition
0V
0V
I
I
f = 400kHz
OL
OL
CC
V
V
= 3.0mA
= 10mA
OUT
= 0V, V
IN
CC
CC
V
V
CC
= 4.5 to 5.5V (except where noted).
– 0.3V
CC
BAT
(1)
= 3.0V
32.768
12.5
Typ
V
BAT
0.7V
–0.3
4.20
Min
2.5
– V
Min
CC
diode
V
Typ
1.5
1.0
1.4
1.0
BAT
Max
35
V
V
0.3V
CC
CC
V
4.50
Max
500
1.9
1.4
3.0
2.5
3.5
0.4
0.4
±1
±1
BAT
+ 0.3
+ 0.3
CC
Unit
kHz
k
pF
Unit
mA
mA
µA
µA
µA
µA
W
V
V
V
V
V
V
V
V
V