SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING DATASHEET Features Description The SX8122 is an analog controlled of 1 Volt motor/ LED timer. 1 V operation 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. Boosted LED control (drives bright white and green LEDS) 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. 1 button operation NiMH cell charger control (allows USB recharge) Applications Toys - LED animation LED pointer USB rechargeable 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. 555 timer applications Ordering Information Part number Function Time out SX8122ISTRT 1V motor controller Set by externals - Available in tape and reel only - WEEE/RoHS compliant- Pb-Free and Halogen Free. Functional Bloc Diagram Rtdown Ct Rtup TRIGGER VDD DISCHARGE MOTOR CHARGE VSS Motor 1 – 2 V Alkaline NiMH or NiCd cell VDD 1.41 V 3 - 5V charger Burst 41kHz NIMH LED 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 ELECTRICAL SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 TECHNICAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 APPLICATION EXAMPLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 MECHANICAL SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8 8.1 8.1.1 8.1.2 8.1.3 Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SOIC-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Land pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ACS - Revision 2.2 © Semtech Corp. August 2010 Page 2 13 13 13 14 15 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING DATASHEET ELECTRICAL SPECIFICATION 1 Absolute Maximum Ratings Note Table 1. 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. Absolute maximum ratings Parameter Symbol Min Max Unit Supply Voltage VAMRVDD -0.3 2.5 V Pin Voltage (non-supply pins) VAMRVIN VSS - 0.3 VDD + 0.3 V Sink or source current on any pin IAMRISS -100 100 mA Storage Temp TSTOR -50 +150 °C ESD conditions HBM ESDHBM 4000 V CDM ESDCDM 1000 V MM ESDMM 200 V 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 2 Specifications 2.1 Operating Conditions Note Table 2. DATASHEET Circuit operates within the Supply Voltage Range VDD-VSS = VDDOC. The specification is verified within the Full Spec Voltage Range VDD-VSS = VDDSPEC. Operating range Parameter Symbol Min Max Unit Supply Voltage Range VDDOC 0.9 2.0 V Full Spec Voltage Range VDDSPEC 1.0 1.8 V Ambient Temperature TOC -40 +85 °C 2.2 Circuit specification Note Table 3. Conditions: Temperature within TOC and VDD-VSS within VDDSPEC, unless otherwise stated. Circuit electrical specification Parameter Symbol Typ Max Unit VSAFE 0.6 0.7 V Threshold VPOR 0.9 V Hysteresis VPORHYST 150 mV Safe mode low limit Min POR voltage Switch ON level VON T : 0 to 70°C Switch OFF level 0.95 1.07 1.15 V 0.85 0.95 1.00 V 0.85 0.95 1.05 V VOFF T : -40 to 85°C VDD VON VOFF VPOR VPORHYST VSAFE time Mode : ACS - Revision 2.2 © Semtech Corp. Safe Low Batt August 2010 ON : Active or Sleep Page 4 Low Batt Safe www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING Table 4. DATASHEET Circuit power consumption specifications Parameter Symbol Min Typ Max Unit 54 μA VDD=2.0V 80 μA Supply current in Force Discharge and Continue Discharge modes (outputs no loaded, MOTOR pin off, LED pin tied to ground) VDD=1.2V 50 μA 73 μA Supply current in Sleep mode (outputs no loaded, MOTOR pin off, LED pin tied to ground) VDD=1.2V Supply current in Force Charge and Continue Charge modes (outputs no loaded, MOTOR pin on, burst on LED pin) VDD=1.2V ICHARGE IDISCHARGE VDD=2.0V VDD=2.0V Supply current in Low Batt mode ILOWBATT Supply current in Safe mode ISAFE Table 5. 10 30 μA 15 40 μA 10 30 μA 10 μA Max Unit ISLEEP Digital IOs specifications Parameter Symbol Min Typ Output High Voltage VOH 3/4 VDD VDD V Output Low Voltage VOL VSS 1/4 VDD V VDD = 0.9 V IOH09 4 mA VDD >= 1.2 V IOH12 10 mA VDD = 0.9 V IOL09 4 mA VDD >= 1.2 V IOL12 10 mA Max Source Current at min VOH Max Sink Current at max VOL Input capacitance Table 6. CI 10 pF Max Unit General specifications Parameter Symbol Min Typ Startup time at power-on tSTART 0.1 s Threshold voltage high on TRIGGER VTHIGH 0.66 VDD Threshold voltage low on TRIGGER VTLOW 0.33 VDD 1.41 V 30 mV Threshold NIMH pin switch voltage VNIMH Hysteresis ACS - Revision 2.2 © Semtech Corp. August 2010 Page 5 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING 3 Pinout 3.1 SOIC-8 pinout Table 7. DATASHEET SX8122 pinout Pin Pin name Pin type Pin function Safe mode Low Batt mode 1 TRIGGER Analog input Signal used to trigger the device High impedance High impedance 2 DISCHARGE Output open collector to VSS Used to discharge the capacitive load High impedance via a resistor VSS 3 CHARGE Output open collector to VDD Used to charge the capacitive load via a resistor High impedance Open source 4 NIMH Digital output Checks the battery status High impedance VDD 5 LED Digital output Sends bursts to light a LED when the High impedance MOTOR is on VSS 6 VSS Power – ground Negative supply and IC ground - - 7 MOTOR Digital output Motor control output High impedance VSS 8 VDD Power – positive Positive supply - - 1 8 TRIGGER VDD DISCHARGE MOTOR CHARGE VSS NIMH LED Figure 1. SX8122 pinout ACS - Revision 2.2 © Semtech Corp. August 2010 Page 6 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING DATASHEET TECHNICAL DESCRIPTION 4 System architecture 4.1 SX8122 architecture The system is based on the cyclic acquisition of the TRIGGER and VDD voltages. 2/3 VDD TRIGGER 1/3 VDD R Q S Q VDD MOTOR DISCHARGE VSS VDD CHARGE VSS VDD NIMH 1.41V BURST LED Figure 2. SX8122 Architecture 4.2 SX8122 timer behavior The SX8122 has an internal level detector that compares the TRIGGER volatge to the VDD voltage. When TRIGGER is above 2/3 of VDD, the comparator sets its output to high; when the TRIGGER is below 1/3 of VDD, the comparator sets its output to low. As long as the TRIGGER voltage is between 1/3 VDD and 2/3 VDD, the comparator output remains unchanged. ACS - Revision 2.2 © Semtech Corp. August 2010 Page 7 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING 4.3 DATASHEET Active modes The circuit has 4 modes of operation when on: 1. Force Charge: pin CHARGE is connected to pin VDD, pin DISCHARGE is in open drain. 2. Continue Charge: pin CHARGE is connected to pin VDD, pin DISCHARGE is in open drain. 3. Force Discharge: pin DISCHARGE is connected to pin VSS, pin CHARGE is in open source. 4. Continue Discharge: pin DISCHARGE is connected to pin VSS, pin CHARGE is in open source. When TRIGGER voltage is below 1/3 of VDD, then the circuit is in Force Charge mode (1) . When TRIGGER voltage is above 2/3 of VDD, then the circuit is in Force Discharge mode (3). When TRIGGER voltage is between 1/3 of VDD and 2/3 of VDD, the circuit goes into mode 2 or 4 depending on which mode it was previousely. The acquisition cycle is continuous and has a cycle frequency of ~5 kHz. 4.4 NiMH pin Pin NIMH goes high when VDD is below the NIMH threshold of 1.41V and low when VDD is above the same threshold. A 30mV hysteresis allow to remove NiMH pin oscillation when the VDD voltage is near the threshold. The supply voltage on VDD pin is checked at a 1Hz rate, so the NiMH pin can switch with a delay of 1 seconds max. ACS - Revision 2.2 © Semtech Corp. August 2010 Page 8 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING 5 DATASHEET Operating Modes VDD 1.05V Switch ON 0.95V Switch OFF 0.9V POR Hysteresis SAFE 0.6V LOW BATT ACTIVE or SLEEP LOW BATT SAFE time Figure 3. Operating modes vs battery voltage 1 1. Typical values. 5.1 Safe Mode The internal system goes in Safe mode as soon as the battery voltage is above 0.6-0.7V. In this mode all pins are set in high impedance and are inactive. This guarantees a safe start-up when a battery is inserted. The power consumption is 10uA max and prevents the battery from leaking when it is empty. 5.2 Low Batt mode The device is in Low Batt mode as soon as the battery voltage reaches the 0.9V POR threshold. In this mode, each output pin is in a static state. The device will not react to the TRIGGER pin. The LED and MOTOR pins are set to ground. The chip internally checks the VDD voltage each seconds and wakes up to Sleep mode when VDD > VON ( 1.05V typical). NIMH pin is forced high until the VDD voltage goes below 0.9V (back to Safe mode), or above 1.41V (battery full). The pin configuration in Low Batt mode corresponds to the Force Discharge mode. 5.3 Active modes The chip reacts to the TRIGGER pin voltage. See 4.3. Active modes. Force charge Continue charge Force discharge Continue discharge NIMH pin is set according to VDD voltage. See 4.4. NiMH pin. ACS - Revision 2.2 © Semtech Corp. August 2010 Page 9 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING DATASHEET APPLICATION EXAMPLES 6 Motor and LED timers 6.1 Dual slope controlled oscillator By connecting a capacitor between TRIGGER and VSS and resistors between pin TRIGGER and pins CHARGE and DISCHARGE, one builds an oscillator which ramp-down is controlled by Rtdown*C and ramp-up by Rtup*C. SX8122 TRIGGER VDD Rtdown DISCHARGE MOTOR CHARGE VSS NIMH LED Rtup Ct Figure 4. Oscillator controlled by two resistors - schematics TRIGGER VDD 2/3 VDD 1/3 VDD VSS 1 2 3 4 1 2 ON MOTOR OFF LED burst burst Figure 5. Oscillator controlled by two resistors - waveform ACS - Revision 2.2 © Semtech Corp. August 2010 Page 10 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING 6.2 DATASHEET Single shot timer The same schematics without the reistor between TRIGGER and DISCHARGE will make a single shot timer controlled by Rtup*C. TRIGGER SX8122 VDD DISCHARGE MOTOR CHARGE VSS NIMH LED Rtup Ct Figure 6. Oscillator controlled by two resistors - schematics TRIGGER VDD 2/3 VDD 1/3 VDD VSS 3 1 2 3 ON MOTOR OFF LED burst burst Figure 7. Oscillator controlled by two resistors - waveform ACS - Revision 2.2 © Semtech Corp. August 2010 Page 11 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING 7 DATASHEET Power management The internal system goes in a safe mode (IOs set as high impedance inputs) as long as the supply is below 0.60.7 V. It starts reacting to TRIGGER when the supply reaches 1.1 V and continues to operate until the supply goes back below 0.9V. When the supply goes below 0.9V, it goes back to safe mode. See 5. Operating Modes. Pin NIMH goes high when VDD is below the NIMH threshold of ~1.41V and low when VDD is above the same threshold. Pin NIMH low means that if the power is coming from one NiMH cell, this one is full. 7.1 Low bat indicator for alkaline cell The SX8122 can be used to indicate low bat of an alkaline cell, even when the cell voltage is below the LED threshold voltage. It can either indicate it with a LED continuously on (simpler schematics, but is drains more current), or with a blinking LED. 1.1 – 1.7 V TRIGGER SX8122 VDD DISCHARGE MOTOR CHARGE VSS NIMH LED Alkaline LED Figure 8. LED is continuously on when the supply voltage is below NiMH threshold 1.1 – 1.7 V TRIGGER SX8122 VDD DISCHARGE MOTOR CHARGE VSS NIMH LED Alkaline LED Figure 9. LED is blinking on when the supply voltage is below NiMH threshold ACS - Revision 2.2 © Semtech Corp. August 2010 Page 12 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING DATASHEET MECHANICAL SPECIFICATION 8 Packages 8.1 SOIC-8 8.1.1 Outline drawing DIMENSIONS MILLIMETERS INCHES DIM MIN NOM MAX MIN NOM MAX A D e 2X E/2 E1 E 1 2 ccc C 2X N/2 TIPS .053 .069 .004 .010 .049 .065 .020 .012 .010 .007 .189 .193 .197 .150 .154 .157 .236 BSC .050 BSC .010 .020 .016 .028 .041 (.041) 8 0° 8° .004 .010 .008 A A1 A2 b c D E1 E e h L L1 N 01 aaa bbb ccc N e/2 B D 1.75 1.35 0.25 0.10 1.65 1.25 0.31 0.51 0.25 0.17 4.80 4.90 5.00 3.80 3.90 4.00 6.00 BSC 1.27 BSC 0.25 0.50 0.40 0.72 1.04 (1.04) 8 0° 8° 0.10 0.25 0.20 aaa C h A2 A SEATING PLANE C h A1 bxN bbb H C A-B D c GAGE PLANE 0.25 SEE DETAIL L (L1) A DETAIL SIDE VIEW 01 A NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEDEC STD MS-012, VARIATION AA. ACS - Revision 2.2 © Semtech Corp. August 2010 Page 13 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING 8.1.2 DATASHEET Land pattern This land pattern is for reference purposes only. Consult your manufacturing group to ensure your company’s manufacturing guidelines are met. X DIM (C) G Z Y C G P X Y Z DIMENSIONS INCHES MILLIMETERS (.205) .118 .050 .024 .087 .291 (5.20) 3.00 1.27 0.60 2.20 7.40 P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. REFERENCE IPC-SM-782A, RLP NO. 300A. ACS - Revision 2.2 © Semtech Corp. August 2010 Page 14 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING 8.1.3 DATASHEET Marking information "##$ &&'' !"##$% &&''" !()(*% + !,)()% ACS - Revision 2.2 © Semtech Corp. August 2010 Page 15 www.semtech.com/products/ SX8122 1V Motor/LED timer ADVANCED COMMUNICATIONS & SENSING DATASHEET © Semtech 2010 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. Semtech assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified range. SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFESUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF SEMTECH PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs damages and attorney fees which could arise. Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. Contact information Semtech Corporation Advanced Communications & Sensing Products E-mail: [email protected] or [email protected] Internet: http://www.semtech.com USA FAR EAST EUROPE 200 Flynn Road, Camarillo, CA 93012-8790. Tel: +1 805 498 2111 Fax: +1 805 498 3804 12F, No. 89 Sec. 5, Nanking E. Road, Taipei, 105, TWN, R.O.C. Tel: +886 2 2748 3380 Fax: +886 2 2748 3390 Semtech Ltd., Units 2 & 3, Park Court, Premier Way, Abbey Park Industrial Estate, Romsey, Hampshire, SO51 9DN. Tel: +44 (0)1794 527 600 Fax: +44 (0)1794 527 601 ISO9001 CERTIFIED ACS - Revision 2.2 © Semtech Corp. August 2010 Page 16 www.semtech.com/products/