Figure 1.1 Connection Diagram - Full Options; Shown for 32-QFN Package

Table 1.2

AKS / Fast-Detect Options

Table 1.3

Max On-Duration

Table 1.4

Polarity and Output

Table 1.5

SYNC/LP Function

5

QT1080 R11.06/0806

SNS3

SNS3K

SNS4

SNS4K

SNS5

SNS5K

SNS6

SNS6K

SNS7

SNS7K

VSS

DETECT

SYNC/LP

SNS2K

SNS2

SNS1K

SNS1

SNS0K

SNS0

/RST

OUT_7

OUT_6

OUT_5

OUT_4

OUT_3

OUT_2

OUT_1

OUT_0

2.2K

10K

4.7nF

10K

10K

10K

10K

4.7nF

4.7nF

4.7nF

2.2K

2.2K

2.2K

2.2K

KEY 2

10K

10K

10K

4.7nF

4.7nF

4.7nF

2.2K

2.2K

OUT_1

OUT_0

DETECT OUT

SYNC or LP IN

OUT_2

OUT_3

OUT_4

OUT_5

OUT_6

OUT_7

2.2K

QT1080

32-QFN

4.7nF

1M

1M

1M

1M

1M

Vdd / Vss

Vdd / Vss

Vdd / Vss

Vdd / Vss

Vdd / Vss

1M

Vdd / Vss

1M

Vdd / Vss

1M

Vdd / Vss

POL

MOD_1

OUT_D

SL_0

SL_1

MOD_0

AKS_1

AKS_0

OUT_0

VDD

Vunreg

*4.7uF

*4.7uF

*100nF

+2.8 ~ +5V

Voltage Reg

VDD

12

13

15

16

17

18

19

20

21

24

23

11

10

9

8

7

6

3

2

32

31

30

29

28

27

26

25

22

KEY 1

KEY 0

KEY 3

KEY 4

KEY 5

KEY 6

KEY 7

R

SNS3

C

S3

R

SNS4

R

SNS5

R

SNS6

R

SNS7

C

S4

C

S5

C

S6

C

S7

R

S3

R

S4

R

S5

R

S6

R

S7

C

S2

R

S2

R

SNS2

R

SNS1

R

SNS0

R

S1

R

S0

C

S1

C

S0

Vdd Range

Rb1

Rb2

3.6 ~ 5V

2.8 ~ 3.59V

12K

22K

15K

27K

Recommended Rb1, Rb2 Values

OSC

SS

4

1

Rb1

Rb2

VDD

C

SS

The required value of spread-spectrum capacitor C

will vary according to the lengths of the acquire bursts,

see Section 3.2. A typical value of C

is 100nF.

SS

SS

Off

On, global

Vdd

Vdd

Off

On, in 2 groups

Vss

Vdd

Enabled

Off

Vdd

Vss

Off

Off

Vss

Vss

FAST-DETECT

AKS MODE

AKS_0

AKS_1

(reserved)

Vdd

Vdd

Infinite (disabled)

Vss

Vdd

60 seconds (nom) to recalibrate

Vdd

Vss

10 seconds (nom) to recalibrate

Vss

Vss

MAX ON-DURATION MODE

MOD_0

MOD_1

Direct, active low, push-pull

Vdd

Vdd

Direct, active high, push-pull

Vss

Vdd

Direct, active low, open-drain

Vdd

Vss

Binary coded, active high, push-pull

Vss

Vss

OUT_n, DETECT PIN MODE

POL

OUT_D

LP mode: 360ms nom response time

Vdd

Vdd

LP mode: 200ms nom response time

Vss

Vdd

LP mode: 110ms nom response time

Vdd

Vss

Sync

Vss

Vss

SYNC/LP PIN MODE

SL_0

SL_1