M41ST87YSS6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M41ST87YSS6

5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM

STMicroelectronics 

Description

Figure 4. Block diagram

M41ST87Y, M41ST87W

VOUT

2

TPXIN

SDA

SCL

I2C

INTERFACE

Crystal(4) XI

32KHz

OSCILLATOR

XO

(3)

WDI

VCC

VBAT

VSS

VBL

REAL TIME CLOCK

CALENDAR

128 BYTES

USER RAM

8 BYTES ROM

RTC w/ALARM

& CALIBRATION

OFIE

AFE

WATCHDOG

WDS

CLRX

SQUARE WAVE

TAMPER

TIEX

CLRXEXT

BL

COMPARE

VSO

COMPARE

RSTIN1

(3)

RSTIN2

(3)

EX

PFI1

PFI2

VPFD

COMPARE

1.25V

(Internal)

1.25V

(Internal)

COMPARE

COMPARE

POR

IRQ/OUT (1)

SQW/FT (2)

TPCLR(3)

VOUT

F32k(1)

RST (1)

ECON(3)

PFO1(2)

PFO2(2)

AI07026

1. Open drain output.

2. Programmable output (open drain or full-CMOS); if open drain option is selected and if pulled-up to supply other than VCC,

this supply must be equal to, or less than VBAT when VCC = 0 V (during battery backup mode).

3. Available in SOX28 (MX) package only.

4. Crystal is external on SSOP (SS) package and internal for the SOX28 (MX) package.

10/52

Doc ID 9497 Rev 8

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