www.fairchildsemi.com KA3050 Camera Motor Drive and Control IC Features Description • Built-in DC motor driver : 1.5-CH DC motor driver : CW, CCW & Brake • Stepping motor driver • Built-in strobo control • Built-in IRED driver for auto-focus • Built-in VE selector • Built-in VE voltage detector • Built-in 5V regulator • Built-in step-up DC/DC converter controller The KA3050 is a monolithic integrated circuit, and suitable for the motor driver (AE, AF, zoom and reel motor driver) and the controller (strobo trigger, IRED driver, supply voltage detector, step-up converter control, etc.) in camera systems. Typical Applications Ordering Information • Camera system 48-QFP-1010E Device Package Operating Temp. KA3050 48-QFP-1010E −20°C ~ +50°C Rev. 1.0.1 February. 2000. ©2000 Fairchild Semiconductor International KA3050 2 DEO RBT BTS VDS FMI IRI S-GND1 S-VE P-VE P-VE FBR FMO Pin Assignments 36 35 34 33 32 31 30 29 28 27 26 25 VDD 37 24 P-GND2 VDI 38 23 IRO VCC 39 22 DM1 MC1 40 21 DM2 MC2 41 20 DM3 MC3 42 19 P-GND2 MC4 43 18 SM1 S-GND2 44 17 SM2 SC1 45 16 SM3 SC2 46 15 SM4 SC3 47 14 SM5 SC4 48 13 P-GND1 4 5 6 7 8 9 NES PTR NEC TRI MGI P-GND1 VSI VSI 10 11 12 MGO 3 TRO 2 OSC 1 SEL KA3050 KA3050 Pin Definitions Pin Number Pin Name Pin Function Description 1 SEL IC on/off 2 NES Comparator input 3 PTR PNP open collector output 4 NEC PNP open collector output 5 TRI Trigger input 6 MGI Magnet drive input 7 P-GND1 8 VSI Step motor & AE meter power 9 VSI Step motor & AE meter power 10 OSC Power ground 1 NPN open collector output 11 TRO PNP open collector output 12 MGO Magnet drive output (NPN open collector output) 13 P-GND1 14 SM5 Step motor & AE meter output 5 15 SM4 Step motor & AE meter output 4 16 SM3 Step motor & AE meter output 3 17 SM2 Step motor & AE meter output 2 18 SM1 Step motor & AE meter output 1 19 P-GND2 20 DM3 DC motor output 3 21 DM2 DC motor output 2 22 DM1 DC motor output 1 23 IRO IRED drive output 24 P-GND2 25 FMO Step-up converter switching output 26 FBR IRED feedback input 27 P-VE Power VE (Battery power) 28 P-VE Power VE (Battery power) 29 S-VE Signal VE (Battery power) 30 S-GND1 Power ground 1 Power ground 2 Power ground 2 Signal ground 1 31 IRI IRED control input 32 FMI Step-up converter clock input 33 VDS VDD selection (4V/5V) 34 BTS Battery selection (3V/6V) 35 RBT VE voltage detection output(analog) 36 DEO VE voltage detection output(digital) 37 VDD Inside power & outside power output 38 VDI Step-up voltage 39 VCC Motor drive IC power & control block power (5V) output 40 MC1 MC code input 1 3 KA3050 Pin Definitions (Continued) Pin Number Pin Name Pin Function Description 41 MC2 MC code input 2 42 MC3 MC code input 3 43 MC4 MC code input 4 44 S-GND2 Signal ground 2 45 SC1 SC code input 1 46 SC2 SC code input 2 47 SC3 SC code input 3 48 SC4 SC code input 4 / buffer output Internal Block Diagram P_VE DM2 22 21 DM3 VSI VSI SM1 SM2 SM3 SM4 SM5 IRO FBR 20 9 8 18 17 16 15 14 23 26 OSC NEC NESPTR MGO 10 4 2 3 TRO 12 11 NPN Open Collector Output DM1 39 PNP Open Collector Output VCC 38 Comparator Input VDI 25 PNP Open Collector Output FMO 27 PNP Open Collector Output 29 NPN Open Collector Output 28 S_VE REG1 I RED Drive Block VDD 37 VDS 33 REG1 IRED/ VE/VDD Detect Stepping Motor Current Control PFM DC/DC 4 P-GND1 7 13 P_GND2 19 24 S-GND 30 44 Motor or Strobo Control Block 1 34 36 SEL BTS DEO 32 35 FMI RBT 40 41 42 43 45 46 47 48 31 6 MC1 MC2 MC3 MC4 SC1 SC2 SC3 SC4 IRI MGI 5 TRI KA3050 Equivalent Circuits Description Pin No. Internal Circuit 1.5-Channel DC Motor Drive Block MC1~4 40~43 SC1~4 45~48 DM1 22 DM2 21 DM3 20 P_VE 27,28 P_GND 7, 13, 19, 24 P_VE 27 28 MC1 MC2 MC3 MC4 40 SC1 SC2 SC3 SC4 45 41 42 MC1~MC4 46 47 DM2 DM3 43 20 DC Motor Control Block DM1 21 22 SC1~SC4 48 7 13 19 24 P_GND Stepping Motor Drive Block MC1~4 40~43 SC1~4 45~48 SM1 18 SM2 17 SM3 16 SM4 15 SM5 14 VSI 8, 9 P_GND 7, 13, 19, 24 VSI MC1 MC2 MC3 MC4 40 SC1 SC2 SC3 SC4 45 8 9 41 42 MC1~MC4 43 46 47 SM1 Step Motor Control Block SM2 18 SM3 17 SM4 15 16 SM5 14 SC1~SC4 48 7 P_GND 19 13 24 IRED Drive Block MC1~4 40~43 SC1~4 45~48 IRO 23 FBR 26 IRO 23 IRI 31 MC1 MC2 MC3 MC4 40 SC1 SC2 SC3 SC4 45 41 42 MC1~MC4 43 46 47 IRED Control Block SC1~SC4 48 26 FBR 5 KA3050 Equivalent Circuits (Continued) Description Pin No. Internal Circuit Step-up Control Block FMI 32 VDI 38 FMO 25 P_GND 7, 13, 19, 24 25 FMO VDI 38 Q S Q R Vref 32 7 13 19 24 FMI P_GND General Buffer & Comparator Drive Block 6 MC1~4 40~43 SC1~3 45~47 MGI 17 MGO 16 NES 2 SC4 48 TRI 5 TRO 11 PTR 3 NEC 4 OSC 10 P_GND 7, 13, 19, 24 MGI 6 NES 2 12 MGO 48 SC4 11 TRO 3 PTR 4 NEC 10 OSC VDD*0.3 VCC TRI MC1 MC2 MC3 MC4 40 SC1 SC2 SC3 45 5 Buffer Control Block 41 42 MC1~MC4 43 46 SC1~SC3 47 7 13 19 24 P_GND KA3050 Absolute Maximum Ratings (Ta = 25°°C) Parameter Symbol Value Unit VE −0.3 ~ +7.5 V Output current (VDD) IVDD 80 mA Output current (VCC) IVCC 50 mA ISM1, 2, 3, 4 500 mA Within 70ms ISM4, 5 1000 mA Within 70ms IDM 3000 mA Within 10ms Supply voltage Output current (Stepping motor) Output current (AE meter) Current (DC motor) Remark Output current (IRO) IIRO 2000 mA Within 500µs Output current (MGO) IMGO 500 mA Within 200ms Output terminal voltage VOUT −0.3 ~ +7.5 V Input terminal voltage VIN −0.3 ~ +7.5 V Power dissipation PD 1.0 W Operating temperature range TOPR −20 ~ +50 °C Storage temperature TSTG −55 ~ +125 °C Power Dissipation Curve Power dissipation (W) 1.0 0.8 Ambient temperature, Ta (°C) 25 50 150 Recommended Operating Conditions (Ta = 25°°C) Parameter Operating Supply Voltage Symbol Min. Typ. Max. Unit VE 2.0 - 7.5 V 7 KA3050 Electrical Characteristics (Ta = 25°°C) Block Total Parameter ISTB - - 1.0 µA 1 - −0.3 - 0.6 V 2 High input voltage range VINH - 1.6 - 7.0 V 3 µA 4 V 5 V 6 V 7 KHz 8 V 9 V 10 V 11 V 12 8 IIH VIH=4.0V - 80 120 IIL VIL=GND −1 - 0 - - 1.0 VVDI1 5.35 5.5 5.65 Step-up output voltage 2 VVDI2 VE=2.0V, ILOAD=100mA 8.3 8.6 8.9 FMO output voltage 1 VOL1 VE=2.0V, ILOAD=700mA - - 0.3 FMO output voltage 2 VOL2 VE=2.0V, ILOAD=1000mA - - 0.4 VMIN - f VE=2.0V 39 156 313 VDD output voltage 3 VVDD3 IO=80mA 3.85 4.0 4.15 VDD output voltage 4 VVDD4 IO=80mA 4.85 5.0 5.15 Input & output potential difference 1 VSAT1 IO=80mA - - 0.3 VE detection voltage (1-1) VTH+1 VE=6V 3.0 3.15 3.3 VE detection voltage (1-2) VTH-1 VE=6V 2.7 2.85 3.0 VE detection voltage (2-1) VTH+2 VE=6V/3V 1.5 1.65 1.8 VE detection voltage (2-2) VTH-2 VE=6V/3V 1.2 1.35 1.5 Output saturation voltage VDEO VE=2.0V, IOL=5mA - - 0.5 V 13 Operating voltage range 1 VOPR1 VE 1.2 - 7.5 V 14 - - 0.1 V 15 0.47 0.5 1.5 - Stand-by output voltage VSBT Output voltage in operating VRBT1 Operating voltage range 2 VOPR2 Output voltage temperature coefficient DC MOTOR VE=6.0V VE=2.0V, ILOAD=100mA FMI step-up clock VCC Notes VINL Step-up output voltage 1 RBT Min. Typ. Max. Unit Low input voltage range Min. operating voltage VDET Condition Leakage current Control input current Step-up & VDD Symbol IOL=10µA - VT - 0.53 × VE 16 7.5 V 17 18 - - 2.0 mV/ °C 4.85 5.0 5.15 V 19 - - 0.3 V 20 1.0 - 7.5 V 21 V 22 V 23 VCC output voltage VVDD5 IO=50mA Input & output potential difference 2 VDAT2 IO=50mA, VCC=3V Function compensation voltage range 3 VOPR3 VE Function compensation voltage range 4 VOPR4 - 1.0 - 7.5 Output voltage (PNP+NPN) 1 VDM1 VE=2.0V, IOL=800mA - 0.6 0.8 Output voltage (PNP+NPN) 2 VDM2 VE=2.0V, IOL=1000mA - 0.8 1.0 KA3050 Electrical Characteristics (Continued) Block Parameter Function compensation voltage range 5 S.M & AE METER Output saturation voltage Output voltage relative error Symbol VOPR5 Condition VSI=VE Min. Typ. Max. Unit Notes 1.6 - 7.5 V 24 VSTP VSI=3.5V, IO=500mA - - 0.8 V 25 ∆V IO=300mA, SMI1,2,3,4 - - 0.1 V 26 VCOIL voltage VCOIL 1.7 1.8 1.9 V VCOIL voltage STEP VCOST - - 190 - mV Function compensation voltage range 6 VOPR6 - 1.0 - 7.5 V 28 TRO output voltage VTRO IO=10mA - - 0.5 V 29 PTR output voltage VPTR IO=10mA - - 0.5 V 30 STROBO NEC output voltage OSC output voltage VNEC IO=10mA - - 0.5 V 31 VOSC IO=10mA - - 0.5 V 32 IRED MG VCC=5V 0.33 × VDD 33 0.3 V 34 - - × VDD 35 - 1.0 V 36 0.72 0.8 0.88 A 37 7.5 V 38 NES detection voltage VNES - 0.27 0.3 SC4 “L” level VSOL - - - - 0.8 - SC4 “H” level VSOH Output saturation voltage 3 VSAT3 Output current IO IOL=1A RFBR=0.25Ω VFBR=200mV 27 Operating voltage range VOP - 1.5 - MGI detection voltage VMGI - 0.22 0.25 MGO output saturation voltage VMGO IO=500mA - - 0.28 × VCC 39 0.5 40 V 9 KA3050 Electrical Characteristics (Continued) Notes: 1. Define Input Current at Stand-By. 2. Define Low Level of Input Terminals. 3. Define High Level of Input Terminals. 4. Define Input Current of Each Control Input Terminals. 5. Define Min. Operating Voltage for Step-up Circuits (SEL, FMO) 6. Define Output Voltage of VDD at Step-up. 7. Define Saturation Voltage of FMO Output. 8. Define Frequency of Step-up Clock. 9. Define Output Voltage of VDD. 10. Define Input and Output Potential Difference of VDD Regulator. 11. Define Detection Voltage of VE Detection Circuit. ( with Hysteresis, Using 6V Battery ) 12. Define Detection Voltage of VE Detection Circuit. ( with Hysteresis, Using 6V or 3V Battery ) 13. Define Output Saturation Voltage of DEO. 14. Define Operating Voltage Range of VE Detection Circuit. 15. Define Output Voltage at Stand-by. 16. Define RBT Output Voltage at Operating RBT Circuit. 17. Define Operating Voltage Range of RBT Circuit. 18. Define Temperature Coefficient of RBT Output Voltage. 19. Define VCC Output Voltage at Connecting VSI and VE. 20. Define Input and Output Potential Difference of VCC Regulator. 21. Define Function Compensation Voltage of VCC Output Circuit. 22. Define Function Compensation Voltage of DC Motor Driving Circuit. 23. Define Output Saturation Voltage ( PNP + NPN ) of DC Motor Driving Circuit. 24. Define Function Compensation Voltage of Stepping Motor and AE Meter Driving Circuit. 25. Define Output Saturation Voltage ( PNP + NPN ) at Flowing Specified Current. 26. Define Relative Error of Output Voltage at Flowing Specified Current between SM1-2 and SM3-4. 27. Define Voltage between Both Side of VCOIL. 28. Define Function Compensation Voltage of Strobo Control Circuit. 29. Define Output Saturation Voltage of TRO. 30. Define Output Saturation Voltage of PTR. 31. Define Output Saturation Voltage of NEC. 32. Define Output Saturation Voltage of OSC. 33. Define Detection Voltage of NES Voltage Detection Circuit. 34. Define Low Level of SC4. 35. Define High Level of SC4. 36. Define Output Saturation Voltage of IRED Driving Circuit. 37. Define Output Current of IRO. 38. Define Operating Voltage Range of IRED Driving Circuit. 39. Define Detection Voltage of MGI. 40. Define Output Saturation Voltage at Flowing Specified Current of MGO. 10 KA3050 Application Information 1. Zoom And Reel Motor Drive Block (1.5-Channel Dc Motor Drive Block) MC1~MC4 DM2 DM3 VE 20 DC Motor Control Block DM1 21 22 SC1~SC4 M M This block diagram describes the driver of zoom and reel motor in camera systems. The drive block is controlled by MC1~4 and SC1~4, which are come from micro controller. Follow is the control logic table. INPUT MC1 L MC2 MC3 MC4 L L L L OUTPUT SC1 DM1 DM2 DM3 H L H - H L H L - H H L L - H L H - H L H H L - L H H H H - L L L SC2 L SC3 L SC4 L 11 KA3050 2. Af Motor And Ae Meter Drive Block (Stepping Motor Drive Block) MC1~MC4 VSI SM1 SM2 18 Stepping Motor Control Block SM3 17 SM4 15 16 SM5 14 SC1~SC4 The block diagram describes the driver of AF motor and AE meter in camera systems. The drive output is selected by MC signals (MC1~4). These MC codes are as follows. INPUT MC1 H OUTPUT MC2 MC3 MC4 SM1 SM2 SM3 SM4 SM5 L L H - - - L H L H L - - - H L L H H - - - L L H L L L H L H - H L H L H H L - H H L H L L H - H H H H L H L - The output voltage (VCOIL) is determined by SC1~4. The VCOIL is potential difference between drive output and ground. i.e., VCOIL = VSM - GND. The VCOIL is selected by following table. 12 KA3050 INPUT VCOIL OUTPUT VOLTAGE [V] SC1 SC2 SC3 SC4 L L L L 1.80 L L L H 1.99 L L H L 2.18 L L H H 2.37 L H L L 2.56 L H L H 2.75 L H H L 2.94 L H H H 3.13 H L L L 3.32 H L L H 3.51 H L H L 3.70 H L H H 3.89 H H L L 4.08 H H L H 4.27 H H H L 4.46 H H H H 4.65 3. Ired Drive Block IRED IRO 23 IRI 31 MC1~MC4 IRED Control Block SC1~SC4 26 FBR RC The block drives infrared emitting diode (IRED). The FBR voltage (VFBR) is controlled by MC codes and SC codes. The IRED current ( IIRED ) is determined by VFBR and resistor Rc. i.e., IIRED = VFBR / RC 13 KA3050 The VFBR is controlled as following table. INPUT VFBR [mV] MC1 MC2 MC3 MC4 SC1 SC2 SC3 SC4 L H L L L L L L 190 L L L H 210 L L H L 230 L L H H 250 L H L L 270 L H L H 290 L H H L 310 L H H H 330 H L L L 350 H L L H 370 H L H L 390 H L H H 410 H H L L 430 H H L H 450 H H H L 470 H H H H 490 4. Step-up Control Block 25 VE FMO 38 Q S Q R VDI Vref 32 The FMO frequency from KA3050 steps up the battery voltage VE. The FMO frequency depends on the FMI frequency, which is come from micro controller. Maximum value of VDI is 5.5V in normal operation mode, and 8.6V in IRED operation mode. i.e., 14 FMI KA3050 Normal Operation Mode: VDI = 5.5V IRED Operation Mode: VDI = 8.6V 5. General Buffer And Comparator Drive Block MGI 6 NES 2 12 MGO 48 SC4 11 TRO 3 PTR 4 NEC 10 OSC VDD*0.3 VCC TRI Buffer Control Block 5 MC1~MC4 SC1~SC3 The KA3050 is composed of 5 general buffers and a comparator. This block has 10 inputs and 6 outputs. All output are controlled by MC and SC codes except MGO. The control codes are as follows. INPUT MC1 L MC2 L MC3 L MC4 L OUTPUT SC1 SC2 SC3 NES TRI SC4 OSC NEC PTR TRO L L H H/L - L/H - H - - L H L H/L - L/H L H - - L H H - - - L - - - H L L - H/L - - - H H/ OPEN The NES and SC4 are conflict with each other, it means. NES = High → SC4 = Low NES = Low → SC4 = High 15 KA3050 The meaning of H/L in TRI signal and H/OPEN in TRO signal are as follows. TRI = High → SC4 = High TRI = Low → SC4 = Open The OSC signal refer to following table. VDET1 DEO(VDET2) H - BTS H L Open(6V) L H Ground(3V) L OSC Step-up Circuit Enable Enable Disable Enable Disable Disable Enable Enable Disable Disable Where, DEO: Battery Voltage Checker, Pin 36 BTS: Battery Selector, Pin 34 Users can’t check the VDET1 because VDET1 is selected automatically inside the KA3050 in 6V battery usage. But step-up circuit (SUC) can be checked by DEO signal. The VDET1 and DEO have hysteresis loop as following graph. VDET1 DEO H L H VTH1- VTH1+ VE[V] The VTH1 and VTH2 refer to electrical characteristics. 16 L VTH2- VTH2+ VE[V] KA3050 6. Other Control Blocks The following table is description of other control blocks. Pin No. Symbol Function 1 SEL 33 VDS 34 BTS 35 RBT 36 DEO 37 VDD 4V or 5V Regulator output 39 VCC 5V Regulator output High: KA3050 Operation Low: KA3050 No Operation Open: VDD = 5V Ground: VDD = 4V Open: VE = 6V Ground: VE = 3V VRBT = VE / 2 High: Sufficient Battery Low: Insufficient Battery 17 KA3050 Control Code Table MC1 MC2 MC3 MC4 SC1 SC2 SC3 SC4 DM1 DM2 DM3 SM1 SM2 SM3 SM4 SM5 OSC NEC PTR NES TR1 L L L L L L L H L L L TR0 FBR VCO - - - - - - - - - - - - - - - - L H - - - - - - - - - - - - - - L L L H L H L - - - - - - - - - - - - - - L L H H L L - - - - - - - - - - - - - - L H L L - - - - - - - - - - - - - - - - L H L H - H L - - - - - - - - - - - - - L H H L - L H - - - - - - - - - - - - - L H H H - L L - - - - - - - - - - - - - H L L L - - - - - - - - - - - - - - - - H L L H - - - - - - L H - - - - - - - - H L H L - - - - - - H L - - - - - - - - H L H H - - - - - - L L - - - - - - - - CODE L L L L CODE H H L L - - - L H L H - - - - - - - - - H H L H - - - L H H L - - - - - - - - - H H H L - - - H L L H - - - - - - - - - H H H H - - - H L H L - - - - - - - - - L L / H L H / * L L / * L L H *1 - - - - - - - - - H - H/L - - - - L H L *1 - - - - - - - - L H - H/L - - - - L H H *1 - - - - - - - - L - - - - - - - H L L *1 - - - - - - - - - - H - H/L H/OPEN - - L L L L - - - - FBR 190mV - - - VCOIL 1.80V - - - L L L H - - - - 210mV - - - 1.99V - - - L L H L - - - - 230mV - - - 2.18V - - - L L H H - - - - 250mV - - - 2.37V - - - L H L L - - - - 270mV - - - 2.56V - - - L H L H - - - - 290mV - - - 2.75V - - - L H H L - - - - 310mV - - - 2.94V - - - L H H H - - - - 330mV - - - 3.13V - - - H L L L - - - - 350mV - - - 3.32V - - - H L L H - - - - 370mV - - - 3.51V - - - H L H L - - - - 390mV - - - 3.70V - - - H L H H - - - - 410mV - - - 3.89V - - - H H L L - - - - 430mV - - - 4.08V - - - H H L H - - - - 450mV - - - 4.27V - - - H H H L - - - - 470mV - - - 4.46V - - - H H H H - - - - 490mV - - - 4.65V - - - L L / * Note: * mark : Detect NES signal and send a inverted signal to SC4. 18 KA3050 Test Circuits 0.25 10K 10K R R L L R R L L SW15 SW18 36 SW17 35 34 SW16 33 32 31 30 29 28 27 26 25 37 24 38 23 39 22 40 21 10K L 41 H H M L H M L H M 20 10K 10K 100 10K 100 L 42 19 KA3050 43 18 H 100 44 17 L H 45 16 46 15 47 14 48 13 L H L H M L H M 10K 100 10K 100 L 1 A IVE 2 3 IVDI SW1 L VE 4 5 6 7 8 9 A VDI 10K 10 SW3 SW2 R R L SW4 RL 12 SW5 RL A R A L 10K 11 IVSI IIN 10K 10K 10K VIN VSI 19 KA3050 Typical Application Circuits 9 VE 25 29 28 27 23 FMO IRO 38 37 39 8 VDI VDD VCC VSI 26 FBR VE 1 5 12 31 32 33 34 Micro Controller Unit 35 36 40 41 42 43 45 46 47 48 24 19 13 7 44 34 33 30 SEL TRI MGO IRI FMI VDS BTS RBT DEO MC1 MC2 MC3 MC4 SC1 SC2 SC3 SC4 GND GND NES PTR NEC OSC TRO DM3 3 Strobo Block 4 10 11 20 M KA3050 DM2 21 DM1 22 SM5 14 SM4 15 M SM3 MGI 6 20 2 16 SM2 17 SM1 18 KA3050 21 KA3050 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR INTERNATIONAL. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 12/1/00 0.0m 001 Stock#DSxxxxxxxx 2000 Fairchild Semiconductor International