Figure 1.1 Connection Diagram - Full Options (32-QFN Package)
Vunreg
4.7uF
+2.8 ~ +5V
Voltage Reg
4.7uF
*100nF
VDD
3
2.2K
12
R
SNS3
4.7nF
MOD_1
C
S3
R
S3
Vdd / Vss
2.2K
4.7nF
2
VDD
SNS3
SNS3K
SNS4
/RST
SNS2K
SNS2
SNS1K
SNS1
SNS0K
SNS0
11
1M
10
9
1M
8
7
1M
6
AKS_0
Vdd / Vss
AKS_1
Vdd / Vss
MOD_0
Vdd / Vss
R
S2
4.7nF
C
S2
2.2K
R
S1
C
S1
2.2K
R
S0
C
S0
2.2K
4.7nF
4.7nF
R
SNS2
KEY 2
10K
R
SNS1
KEY 3
10K
R
SNS4
1M
13
KEY 1
10K
R
SNS0
KEY 4
10K
R
SNS5
4.7nF
C
S4
R
S4
2.2K
15
16
SNS4K
SNS5
SNS5K
SNS6
SNS6K
SNS7
SNS7K
SNS8
SNS8K
SNS9
SNS9K
KEY 5
10K
R
SNS6
4.7nF
OUT_D
C
S5
R
S5
Vdd / Vss
2.2K
KEY 0
10K
1M
17
18
KEY 6
10K
R
SNS7
4.7nF
C
S6
R
S6
2.2K
SL_0
Vdd / Vss
1M
19
20
QT1101
32-QFN
Rb1
VDD
Recommended Rb1, Rb2 Values
With Spread-Spectrum
Vdd Range
Rb1 Rb2
2.8 ~ 2.99V 12K 27K
3.0 ~ 3.59V 12K 22K
3.6 ~ 5V 15K 27K
No Spread-Spectrum
Vdd Range
Rb1 Rb2
2.8 ~ 2.99V 15K
dni
3.0 ~ 3.59V 18K
dni
3.6 ~ 5V 20K
dni
dni = do not install
KEY 7
10K
R
SNS8
4.7nF
SL_1
C
S7
R
S7
Vdd / Vss
2.2K
1M
21
25
OSC
4
Rb2
KEY 8
10K
R
SNS9
4.7nF
C
S8
R
S8
2.2K
26
27
KEY 9
10K
C
S9
R
S9
28
Css
SS
1
100nF
No Spread-spectrum:
Replace Css with 100K resistor
100K
RX
SYNC or LP
Pullup not required for push-pull mode
See Detect pin mode table below
100K
Vdd
23
32
100K
31
100K
30
29
5
Vdd
Vdd
Vdd
2W DATA
DATA
/CHANGE
SYNC/LP
1W
/CHANGE
DETECT OUT
24
DETECT
N.C.
N.C.
VSS
22
Table 1.2
AKS / Fast-Detect Options
AKS_1
Vss
Vss
Vdd
Vdd
MOD_1
Vss
Vss
Vdd
Vdd
OUT_D
Vss
Vdd
SL_1
Vss
Vss
Vdd
Vdd
AKS_0
Vss
Vdd
Vss
Vdd
MOD_0
Vss
Vdd
Vss
Vdd
AKS MODE
Off
Off
On, in 3 groups
On, global
FAST-DETECT
Off
Enabled
Off
Off
Table 1.3
Max On-Duration
MAX ON-DURATION MODE
10 seconds to recalibrate
60 seconds to recalibrate
Infinite (disabled)
(reserved)
Table 1.4
Detect Pin Drive
DETECT PIN MODE
Open drain, active low
Push-pull, active high
SL_0
Vss
Vdd
Vss
Vdd
SYNC/LP PIN MODE
Sync
LP mode: 120ms response time
LP mode: 200ms response time
LP mode: 360ms response time
Table 1.5
SYNC/LP Function
Lq
4
QT1101 R4.06/0806
QUANTUM [ QUANTUM RESEARCH GROUP ]
