M41T81S

Description

Doc ID 10773 Rev 7

7/32

Table 1.

Signal names

Figure 2.

8-pin SOIC (M) connections

1.

Open drain output

Figure 3.

18-pin, 300 mil SOIC (MY) connections

1.

NC and NF pins should be tied to VSS. Pins 2 and 3 are internally shorted together. Pins 17 and 16 are

internally shorted together.

2.

Open drain output

XI(1)

1.

For SO8 package only.

Oscillator input

XO(1)

Oscillator output

IRQ/OUT/FT/SQW

Interrupt / output driver / frequency test / square wave (open drain)

SDA

Serial data input/output

SCL

Serial clock input

VBAT

Battery supply voltage

VCC

Supply voltage

VSS

Ground

NC(2)

2.

NC and NF pins should be tied to VSS.

No connect

NF(2)

No function

2

3

45

6

8

7

1

IRQ/FT/OUT/SQW

(1)

SDA

VBAT

SCL

VSS

XO

XI

VCC

M41T81S

AI09161

8

2

3

4

5

6

7

9

12

11

10

18

17

16

15

14

13

1

NF

(1)

NC

NC

NC

NC

NC

NC

SCL

SDA

VSS

VBAT

NF

(1)

NC

VCC

M41T81S

IRQ/FT/OUT/SQW

(2)

NF

(1)

NF

(1)

NC

AI09162