SX8122
1V Motor/LED timer
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Description
The SX8122 is an analog controlled of 1 Volt motor/
LED timer.
The SX8122 toggles its output high or low according
to the state of an analog pin (TRIGGER). Threshold
voltages on the analog pin are set to 1/3 and 2/3 of
VDD.
One output pin (LED) send bursts when the motor is
on to control a LED which threshold voltage is above
VDD or to generate a boosted supply.
One output goes low when VDD is higher than the
full charge voltage of an NiMH cell to control a
minimal charger.
The SX8122 controls its IO state starting at 0.6V to
facilitate power-up.
Features
1 V operation
1 button operation
Boosted LED control (drives bright white and green
LEDS)
NiMH cell charger control (allows USB recharge)
Applications
Toys - LED animation
LED pointer
USB rechargeable
555 timer applications
Ordering Information
Part number
SX8122ISTRT
Function
1V motor controller
Time out
Set by externals
- Available in tape and reel only
- WEEE/RoHS compliant- Pb-Free and Halogen Free.
Functional Bloc Diagram
Rtdown
TRIGGER
VDD
Motor
Ct
Rtup
DISCHARGE
MOTOR
CHARGE
VDD
1.41 V
VSS
1 – 2 V Alkaline
NiMH or NiCd cell
LED
3 - 5V charger
NIMH
Burst
41kHz
LED
SX8122
ACS - Revision 2.2
© Semtech Corp.
August 2010
Page 1
www.semtech.com/products/
SX8122
1V Motor/LED timer
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
TABLE OF CONTENT
Section
Page
E
LECTRICAL
S
PECIFICATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1
2
2.1
2.2
3
3.1
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOIC-8 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
4
4
4
6
6
T
ECHNICAL
D
ESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
4.1
4.2
4.3
4.4
5
5.1
5.2
5.3
System architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SX8122 architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SX8122 timer behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NiMH pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safe Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Batt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
7
7
8
8
9
9
9
9
A
PPLICATION
E
XAMPLES
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6
6.1
6.2
7
7.1
Motor and LED timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dual slope controlled oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Single shot timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low bat indicator for alkaline cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
10
11
12
12
M
ECHANICAL
S
PECIFICATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8
8.1
8.1.1
8.1.2
8.1.3
Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOIC-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Land pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
13
13
14
15
ACS - Revision 2.2
© Semtech Corp.
August 2010
Page 2
www.semtech.com/products/
SX8122
1V Motor/LED timer
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
ELECTRICAL SPECIFICATION
1
Absolute Maximum Ratings
Note
The Absolute Maximum Ratings, in table below, are stress ratings only. Functional
operation of the device at conditions other than those indicated in the Operating
Conditions sections of this specification is not implied.
Exposure to the absolute maximum ratings, where different to the operating
conditions, for an extended period may reduce the reliability or useful lifetime of the
product.
Table 1.
Absolute maximum ratings
Parameter
Symbol
V
AMRVDD
V
AMRVIN
I
AMRISS
T
STOR
HBM
ESD
HBM
ESD
CDM
ESD
MM
Min
-0.3
VSS - 0.3
-100
-50
4000
1000
200
Max
2.5
VDD + 0.3
100
+150
Unit
V
V
mA
°C
V
V
V
Supply Voltage
Pin Voltage (non-supply pins)
Sink or source current on any pin
Storage Temp
ESD conditions
CDM
MM
ESD CAUTION
ESD (electrostatic discharge) sensitive device
Charged devices and circuit boards can discharge without detection. Athough this product features
patented or proprietary protection circuitry, damage may occur on devices subjected to high energy
ESD. Therfore, proper ESD precaution should be taken to avoid performance degradation or loss of
functionality.
ACS - Revision 2.2
© Semtech Corp.
August 2010
Page 3
www.semtech.com/products/
SX8122
1V Motor/LED timer
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
2
2.1
Specifications
Operating Conditions
Note
Circuit operates within the Supply Voltage Range VDD-VSS = VDDOC.
The specification is verified within the Full Spec Voltage Range VDD-VSS = VDDSPEC.
Table 2.
Operating range
Parameter
Symbol
V
DDOC
V
DDSPEC
T
OC
Min
0.9
1.0
-40
Max
2.0
1.8
+85
Unit
V
V
°C
Supply Voltage Range
Full Spec Voltage Range
Ambient Temperature
2.2
Circuit specification
Note
Conditions: Temperature within TOC and VDD-VSS within VDDSPEC, unless
otherwise stated.
Table 3.
Circuit electrical specification
Parameter
Symbol
V
SAFE
Threshold
V
POR
V
PORHYST
V
ON
T : 0 to 70°C
0.95
0.85
V
OFF
T : -40 to 85°C
0.85
0.95
1.05
V
Min
Typ
0.6
0.9
150
1.07
0.95
1.15
1.00
Max
0.7
Unit
V
V
mV
V
V
Safe mode low limit
POR voltage
Hysteresis
Switch ON level
Switch OFF level
VDD
V
ON
V
OFF
V
POR
V
PORHYST
V
SAFE
time
Mode :
Safe
Low Batt
ON : Active or Sleep
Low Batt
Safe
ACS - Revision 2.2
© Semtech Corp.
August 2010
Page 4
www.semtech.com/products/
SX8122
1V Motor/LED timer
ADVANCED COMMUNICATIONS & SENSING
Table 4.
Circuit power consumption specifications
Parameter
Supply current in Force Charge and
Continue Charge modes (outputs no
loaded, MOTOR pin on, burst on LED pin)
Supply current in Force Discharge and
Continue Discharge modes (outputs no
loaded, MOTOR pin off, LED pin tied to
ground)
Supply current in Sleep mode
(outputs no loaded, MOTOR pin off, LED
pin tied to ground)
Supply current in Low Batt mode
Supply current in Safe mode
VDD=1.2V
I
CHARGE
VDD=2.0V
VDD=1.2V
I
DISCHARGE
VDD=2.0V
VDD=1.2V
I
SLEEP
VDD=2.0V
I
LOWBATT
I
SAFE
15
10
40
30
10
73
10
30
80
50
Symbol
Min
Typ
54
DATASHEET
Max
Unit
μA
μA
μA
μA
μA
μA
μA
μA
Table 5.
Digital IOs specifications
Parameter
Symbol
V
OH
V
OL
VDD = 0.9 V
I
OH09
I
OH12
I
OL09
I
OL12
C
I
Min
3/4 VDD
VSS
4
10
4
10
10
Typ
Max
VDD
1/4 VDD
Unit
V
V
mA
mA
mA
mA
pF
Output High Voltage
Output Low Voltage
Max Source Current at min VOH
VDD >= 1.2 V
VDD = 0.9 V
Max Sink Current at max VOL
VDD >= 1.2 V
Input capacitance
Table 6.
General specifications
Parameter
Symbol
t
START
V
THIGH
V
TLOW
Threshold
Min
Typ
0.1
0.66
0.33
1.41
V
NIMH
Hysteresis
30
mV
Max
Unit
s
VDD
VDD
V
Startup time at power-on
Threshold voltage high on TRIGGER
Threshold voltage low on TRIGGER
NIMH pin switch voltage
ACS - Revision 2.2
© Semtech Corp.
August 2010
Page 5
www.semtech.com/products/
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
