M41ST87YMX6TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

M41ST87YMX6TR

5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection

STMicroelectronics 

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M41ST87Y, M41ST87W

Figure 20. RAM Clear Hardware Hookup

Inhibit

VIN

VCC

5V

Regulator

Pushbutton

Reset

M41ST87Y/W

VCC

TP1IN

TP2IN

EX

SCL

TPCLR

VOUT

ECON

WDI

RSTIN1

RSTIN2

PFI1

PFI2

VSS

VBAT

SDA

RST

SQW/FT

PFO1

PFO2

IRQ/OUT

F32k

Inverting

Charge

Pump

IN OUT

SHDN

CAP+ CAP–

Negative Output

(–1 x VIN)

(1)

(2)

VCC

To RST

E

Low-Power

SRAM

To LED Display

To NMI

To INT

To 32kHz

AI07804

Note: 1. Most inverting Charge Pumps drive OUT to Ground when device shut down is enabled (SHDN = logic low). Therefore, an n-channel

enhancement mode MOSFET should be used to isolate the OUT pin from the VOUT of the M41ST87.

2. In order to avoid turning on an on-chip parasitic diode when driving VOUT negative, a p-channel enhancement mode MOSFET

should be used to isolate the VOUT pin from the negative voltage generated by the inverting Charge Pump.

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