M41T00AUDD1F

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30 P31-P33 P34-P36 P37-P39 P40-P42

M41T00AUD Pin settings

Doc ID 13480 Rev 5 7/42

2 Pin settings

2.1 Pin connection

Figure 2. Pin connection

2.2 Pin description

OSCI

1

OSCO

2

V

SS

3

4

V

CC

IRQ/FT/OUT

V

BACK

SCL

SDA

5

6

7

8

16

15

14

13

12

11

10

9

V

CC

AOUT+

FBK

V

BIAS

NC

AOUT–

AIN

V

SS

ai13323

Table 1. Pin description

Symbol Name and function

V

CC

Supply voltage

OSCI Oscillator input

OSCO Oscillator output

SCL I

2

C serial clock

SDA I

2

C serial data

AIN Audio input

V

BIAS

Input for decoupling capacitor

V

SS

Ground

AOUT– Analog out, 180 phase

AOUT+ Analog out, 0 phase

IRQ/FT/OUT

Interrupt output for oscillator fail detect, frequency

test output for calibration, or discrete logic output

V

BACK

Backup supply voltage

FBK

Feedback; connect feedback resistor between this

pin and AIN

NC No connection

No name; exposed pad on back of IC

package

Must be connected to ground

Application M41T00AUD

8/42 Doc ID 13480 Rev 5

3 Application

Figure 3. Application diagram

AU TOMATIC

BATTERY

SWITCHOVER

& DESELEC T

V

CC

2

I

2

C

V

CC

32KHz

OSCILL ATOR

400kHz I

2

C

INTER FACE

OSCI

OSCO

uC

REFERENCE

V

PFD

=2.80V

IRQ/FT/OUT

TRICKLE

CHARGE

V

INT

V

BACK

V

CC

256/512Hz

AUDIO

BPF

ADJ

GAIN

AIN

AOUT+

AOUT–

V

SS

V

BIAS

WRITE

FBK

Audio-in

M41T00AUD

ai13324

SECS

MINS

HOURS

DATE

DAY

MONTH

YEAR

CENTURY BIT

CALIBRATION

OUT

OSCILLATOR

FAIL DETECT

I

2

C

(SDA,

SCL)

PROTECT

M41T00AUD Application

Doc ID 13480 Rev 5 9/42

Figure 4. Typical hookup example

BATTERY

SWITCHOVER

32 KHz

OSC

I

2

C

OSCI

OSCO

IRQ/FT/OUT

TRICKLE

CHARGE

V

INT

V

BACK

256/512 Hz

AUDIO

SECTION

AIN

AOUT+

AOUT–

V

BIAS

0.1 µF

Audio

In

0.22 µF

3.3 V

0.1 µF

V

CC

1.0 µF

V

CC

4

15

SCL 7

SDA 8

3.3V

SCL

SDA

3.3V

1

2

32.768 kHz

6

+

(typical)

Lithium

Cell

Battery

(alternative)

Either/or, but

not both

5

Optional connection

to micro

13

16

11

R1

x

R1

x

Optional: can

sum additional

audio inputs

Set R1’s to 2x

R2 for unity gain

10

PMH

Package Metal Heatsink:

exposed pad on back of

IC package

RTC

*optional

V

SS

3

V

SS

14

Place near

pin 15

Place near

pin 4

V

DD

2

V

DD

2

FBK

12

3.3 V

R2 should

be a minimum

ONE GEN

M41T00AUD

ai13325

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30 P31-P33 P34-P36 P37-P39 P40-P42

M41T00AUDD1F

Mfr. #:

Buy M41T00AUDD1F

Manufacturer:

STMicroelectronics

Description:

Real Time Clock SERIAL RTC W/AUDIO

Lifecycle:

New from this manufacturer.

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M41T00AUDD1F