M41T256YMT7 STMicroelectronics, M41T256YMT7 Datasheet - Page 23

• 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

5
DC and AC parameters
This section summarizes the operating and measurement conditions, as well as the DC and
AC characteristics of the device. The parameters in the following DC and AC Characteristic
tables are derived from tests performed under the Measurement Conditions listed in
DC and AC measurement
in their projects match the measurement conditions when using the quoted parameters.
Table 6.
Figure 13. AC testing input/output waveforms
Table 7.
1. Effective capacitance measured with power supply at 5V; sampled only, not 100% tested.
2. At 25°C, f = 1MHz.
3. Outputs deselected.
V
Ambient operating temperature
Load capacitance (C
Input rise and fall times
Input pulse voltages
Input and output timing ref. voltages
Symbol
CC
C
C
t
IO
LP
IN
Supply voltage
(3)
Input capacitance
Input capacitance (tamper pin)
Input / output capacitance
Low-pass filter input time constant (SDA and SCL)
DC and AC measurement conditions
Capacitance
L
)
0.8V CC
0.2V CC
Parameter
conditions. Designers should check that the operating conditions
Parameter
(1) and (2)
0.7V CC
0.3V CC
AI02568
Min
0.2V
0.3V
–25 to 70°C
M41T256Y
4.5 to 5.5V
CC
CC
100pF
50ns
to 0.8V
to 0.7V
1000
Max
10
50
7
CC
CC
Table 6:
Unit
23/30
pF
pF
pF
ns