m41st87w STMicroelectronics, m41st87w Datasheet - Page 36

• Manufacturer Part Number: m41st87w
• Description: 5.0, 3.3, Or 3.0v, 1280 Bit 160 X8 Secure Serial Rtc And Nvram Supervisor With Tamper Detection
• Manufacturer: STMicroelectronics

M41ST87Y, M41ST87W
DC AND AC PARAMETERS
This section summarizes the operating and mea-
surement 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 Measure-
Table 15. DC and AC Measurement Conditions
Note: Output High Z is defined as the point where data is no longer driven.
Figure 27. AC Testing Input/Output Waveforms
Note: 50pF for M41ST87W.
Table 16. Capacitance
Note: 1. Effective capacitance measured with power supply at 5V. Sampled only, not 100% tested.
36/42
V
Ambient Operating Temperature
Load Capacitance (C
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
CC
0.8V CC
0.2V CC
Symbol
C
Supply Voltage
2. At 25°C, f = 1MHz.
3. Outputs are deselected.
OUT
C
t
LP
IN
(3)
Input Capacitance
Output Capacitance
Low-pass filter input time constant (SDA and SCL)
L
)
Parameter
Parameter
0.7V CC
0.3V CC
AI02568
(1,2)
ment Conditions listed in the relevant tables. De-
signers should check that the operating conditions
in their projects match the measurement condi-
tions when using the quoted parameters.
Min
0.2 to 0.8V
0.3 to 0.7V
–40 to 85°C
M41ST87Y
4.5 to 5.5V
100pF
50ns
CC
CC
Max
10
50
7
0.2 to 0.8V
0.3 to 0.7V
M41ST87W
–40 to 85°C
2.7 to 3.6V
50pF
50ns
Unit
pF
pF
ns
CC
CC