SX8122 Datasheet, PDF (1/16 Pages) Semtech Corporation – 1V Motor/LED timer

ADVANCED COMMUNICATIONS & SENSING
SX8122
1V Motor/LED timer
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
Function
SX8122ISTRT
1V motor controller
- Available in tape and reel only
- WEEE/RoHS compliant- Pb-Free and Halogen Free.
Time out
Set by externals
Functional Bloc Diagram
Rtdown
Ct ^Rtup
3 - 5V charger
TRIGGER
DISCHARGE
CHARGE
VDD
1.41 V
NIMH
SX8122
VDD
MOTOR
Burst
41kHz
VSS
LED
Motor
1 – 2 V Alkaline
NiMH or NiCd cell
LED
ACS - Revision 2.2
© Semtech Corp.
August 2010
Page 1
www.semtech.com/products/