Part Number
|
M41ST87Y |
Manufacturer
|
STMicroelectronics |
Description
|
5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor |
Published
|
Dec 9, 2010 |
Detailed Description
|
M41ST87Y M41ST87W
5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clea...
|
Datasheet
|
M41ST87Y
|
Overview
M41ST87Y M41ST87W
5.
0 V and 3.
3/3.
0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM
Features
■ ■ ■ ■ ■ ■
5.
0, 3.
3, or 3.
0 V operation 400 kHz I2C bus NVRAM supervisor to non-volatize external LPSRAM 2.
5 to 5.
5 V oscillator operating voltage Automatic switchover and deselect circuitry Choice of power-fail deselect voltages – M41ST87Y: THS = 1: VPFD≈ 4.
63 V; VCC = 4.
75 to 5.
5 V THS = 0: VPFD≈ 4.
37 V; VCC = 4.
5 to 5.
5 V – M41ST87W: THS = 1: VPFD ≈ 2.
9 V; VCC = 3.
0 to 3.
6 V THS = 0: VPFD ≈ 2.
63 V; VCC = 2.
7 to 3.
6 V Two independent power-fail comparators (1.
25 V reference) Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, da...
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