M41T93_11 datasheet(7/51 Pages) STMICROELECTRONICS

Part #	M41T93

Description	Serial SPI bus real-time clock with battery switchover

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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7 / 51 page

M41T93

Description

Doc ID 12615 Rev 6

7/51

Figure 1.

Logic diagram

1.

For QFN16 package only

2.

Defaults to 32 KHz on power-up

3.

Open drain

Table 1.

Signal names

Symbol

Description

XI(1)

1.

For QFN16 package only

32 KHz oscillator input

XO(1)

32 KHz oscillator output

IRQ/FT/OUT

Interrupt /frequency test/output driver (open drain)

SQW(2)

2.

Defaults to 32 KHz on power-up

32 KHz programmable square wave output

RST

Power-on reset output (open drain)

E

Chip enable

SDI

Serial data address input

SDO

Serial data address output

SCL

Serial clock input

VBAT

Battery supply voltage (Tie VBAT to VSS if no battery is connected.)

DU(3)

3.

Do not use (must be tied to VCC)

Do not use

VCC

Supply voltage

VSS

Ground

SDI

VCC

VSS

VBAT

SCL

RST

(3)

E

IRQ/OUT/FT

(3)

SQW

(2)

SDO

XI

(1)

XO

(1)

AI11818

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