MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators General Description Features The MAX9075/MAX9077 single/dual comparators are (cid:2) 580ns Propagation Delay from Only 3µA optimized for 3V and 5V single-supply applications. These comparators have a 580ns propagation delay and (cid:2) 2.1V to 5.5V Single-Supply Operation consume just 3µA per comparator. The combination of (cid:2) Ground-Sensing Inputs low-power, single-supply operation down to 2.1V, and (cid:2) Rail-to-Rail Outputs ultra-small footprint makes these devices ideal for all portable applications. (cid:2) No Output Phase Inversion for Overdriven Inputs The MAX9075/MAX9077 have a common-mode input (cid:2) No Differential Clamp Across Inputs voltage range of -0.2V to VCC- 1.2V. Unlike many com- parators, there is no differential clamp between the (cid:2) Available in Ultra-Small Packages inputs, allowing the differential input voltage range to 5-Pin SC70 (MAX9075) extend rail-to-rail. All inputs and outputs tolerate a con- 8-Pin SOT23 (MAX9077) tinuous short-circuit fault condition to either rail. The design of the output stage limits supply-current Ordering Information surges while switching (typical of many other compara- tors), minimizing power consumption under dynamic PIN- TOP PART* TEMP RANGE conditions. Large internal push-pull output drivers allow PACKAGE MARK rail-to-rail output swing with loads up to 2mA, making MAX9075EXK+T -40°C to +85°C 5 SC70 AAC+ these devices ideal for interface with TTL/CMOS logic. MAX9075EUK+T -40°C to +85°C 5 SOT23 ADLX+ The MAX9075 single comparator is available in 5-pin MAX9077EKA+T -40°C to +85°C 8 SOT23 AAAD+ SC70 and SOT23 packages, while the MAX9077 MAX9077EUA+ -40°C to +85°C 8 µMAX — dual comparator is available in 8-pin SOT23, µMAX®, and SO packages. MAX9077ESA+ -40°C to +85°C 8 SO — MAX9077MSA/PR2 -55°C to +125°C 8 SO — Applications +Denotes a lead(Pb)-free/RoHS-compliant package. *Denotes a package containing lead(Pb). Battery-Powered Systems T = Tape and reel. Threshold Detectors/Discriminators Keyless Entry Systems Typical Operating Circuit IR Receivers Digital Line Receivers VCC Pin Configurations TOP VIEW VIN VCC + OUT 1 5 VCC MAX9075 IN+ MAX9077 MAX9075 GND 2 OUT IN- IN+ 3 4 IN- VREF GND SC70-5/SOT23-5 Pin Configurations continued at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information,please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 19-1547; Rev 4; 12/12

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltage 8-Pin µMAX (derate 4.5mW/°C above +70°C)...........362mW VCCto GND........................................................................6V 8-Pin SO (derate 5.88mW/°C above +70°C)..............471mW All Other Pins to GND...........................-0.3V to (VCC+ 0.3V) Operating Temperature Range...........................-40°C to +85°C Current into Input Pins......................................................±20mA Military Operating Temperature Range.............-55°C to +125°C Duration of Output Short-Circuit to GND or VCC........Continuous Storage Temperature Range.............................-65°C to +150°C Continuous Power Dissipation (TA= +70°C) Lead Temperature (soldering, 10s).................................+300°C 5-Pin SC70 (derate 3.1mW/°C above +70°C)............247mW Soldering Temperature (reflow) 5-Pin SOT23 (derate 3.1mW/°C above +70°C)..........247mW Lead (Pb)-free............................................................+260°C 8-Pin SOT23 (derate 5.2mW/°C above +70°C)..........412mW Containing lead (Pb)..................................................+240°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC= 5V, VCM= 0V, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage Range VCC Inferred from PSRR 2.1 5.5 V TA= +25°C 3 5.2 VCC= 5V Supply Current per Comparator ICC TA= TMINto TMAX 7.5 µA VCC= 3V 2.4 Power-Supply Rejection Ratio PSRR 2.1V ≤VCC≤5.5V 54 77 dB Common-Mode Voltage Range VCMR (Note 2) 0 VCC - V 1.2 Input Offset Voltage VOS ±1 ±8 mV Input Offset Current IOS 1 nA Input Bias Current IB VCM= 0.2V (Note 3) -5 -20 nA Input Capacitance CIN 3 pF Common-Mode Rejection Ratio CMRR 0V ≤VCM≤(VCC- 1.2V) 60 82 dB VCC- OUT_ Output-Voltage High VOH ISOURCE= 2mA 0.4 V OUT_ Output-Voltage Low VOL ISINK= 2mA 0.4 V Propagation Delay Low to High tPD+ CLOAD= 10pF, overdrive = 100mV 580 ns Propagation Delay High to Low tPD- CLOAD= 10pF, overdrive = 100mV 250 ns Rise/Fall Time CLOAD= 10pF 1.6 ns Note 1: All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design. Note 2: Inferred from CMRR. Either input can be driven to the absolute maximum limit without output inversion, as long as the other input is within the input voltage range. Note 3: Guaranteed by design. 2 Maxim Integrated

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (VCC= 5V, VCM= 0V, 100mV overdrive, TA= +25°C, unless otherwise noted.) OUTPUT-VOLTAGE LOW OUTPUT-VOLTAGE LOW OUTPUT-VOLTAGE LOW vs. SINK CURRENT (VCC = 2.1V) vs. SINK CURRENT (VCC = 3V) vs. SINK CURRENT (VCC = 5V) 23..50 MAX9075/7 toc01 334...500 MAX9075/7 toc02 76 MAX9075/7 toc03 V) V) V) 5 GE ( 2.0 GE ( 2.5 GE ( VOLTA 1.5 TA = +25°C VOLTA 2.0 TA = +25°C VOLTA 4 TA = +25°C UT UT UT 3 UTP 1.0 TA = +85°C UTP 1.5 TA = +85°C UTP TA = +85°C O O O 2 1.0 0.5 TA = -40°C TA = -40°C TA = -40°C 0.5 1 0 0 0 0 5 10 15 20 0 5 10 15 20 25 30 35 40 0 10 20 30 40 50 60 70 80 90 SINK CURRENT (mA) SINK CURRENT (mA) SINK CURRENT (mA) OUTPUT-VOLTAGE HIGH OUTPUT-VOLTAGE HIGH OUTPUT-VOLTAGE HIGH vs. SOURCE CURRENT (VCC = 2.1V) vs. SOURCE CURRENT (VCC = 3V) vs. SOURCE CURRENT (VCC = 5V) 22..05 TA = -40°C MAX9075/7 toc04 233...505 TA = -40°C MAX9075/7 toc05 56 TA = -40°C MAX9075/7 toc06 OUTPUT VOLTAGE (V) 011...550 TA = +8T5A° =C +25°C OUTPUT VOLTAGE (V) 112...500 TA T=A + =8 5+°2C5°C OUTPUT VOLTAGE (V) 1324 TA =T +A8 =5 °+C25°C 0.5 0 0 0 -0.5 -0.5 -1 0 2 4 6 8 10 12 14 16 18 0 5 10 15 20 25 30 35 40 45 0 10 20 30 40 50 60 70 80 90 100 SOURCE CURRENT (mA) SOURCE CURRENT (mA) SOURCE CURRENT (mA) SHORT-CIRCUIT SINK CURRENT SHORT-CIRCUIT SOURCE CURRENT SUPPLY CURRENT vs. TEMPERATURE vs. TEMPERATURE vs. TEMPERATURE (OUT = HIGH) 879000 VCC = 5V MAX9075 toc07 1890000 VCC = 5V MAX9075 toc08 434...055 MAX9075 toc09 RRENT (mA) 6500 URRENT (mA) 765000 μURRENT (A) 32..05 VVCCCC == 53VV SINK CU 4300 VCC = 3V SOURCE C 4300 VCC = 3V SUPPLY C 21..05 VCC = 2.1V 20 VCC = 2.1V 20 VCC = 2.1V 1.0 10 10 0.5 0 0 0 -55 -35 -15 5 25 45 65 85 -55 -35 -15 5 25 45 65 85 -55 -35 -15 5 25 45 65 85 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) Maxim Integrated 3

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (continued) (VCC= 5V, VCM= 0V, 100mV overdrive, TA= +25°C, unless otherwise noted.) SUPPLY CURRENT SUPPLY CURRENT INPUT OFFSET VOLTAGE vs. TEMPERATURE (OUT = LOW) vs. OUTPUT TRANSITION FREQUENCY vs. TEMPERATURE 43..05 MAX9075 toc10 1000 MAX9075 toc11 -0.01 MAX9075 toc12 μSUPPLY CURRENT (A) 12132.....00505 VVCCCC =V= C 53CVV = 2.1V μSUPPLY CURRENT (A) 11000 VCC V=C 3CV = 5V OFFSET VOLTAGE (mV) -----00000.....64523 VCVCC =C 3=V 5V VCC = 2.1V 0.5 VCC = 2.1V -0.7 0 1 -0.8 -55 -35 -15 5 25 45 65 85 1 10 100 1k 10k 100k 1M -55 -35 -15 5 25 45 65 85 TEMPERATURE (°C) TRANSITION FREQUENCY (Hz) TEMPERATURE (°C) PROPAGATION DELAY PROPAGATION DELAY PROPAGATION DELAY vs. LOAD CAPACITANCE vs. INPUT OVERDRIVE (tPD+) vs. INPUT OVERDRIVE (tPD-) 00..67 tPD+ MAX9075 toc13 11..46 MAX9075 toc14 00..67 MAX9075 toc15 μY (s) 0.5 μY (s) 1.2 μY (s) 0.5 LA LA 1.0 LA DE 0.4 DE DE 0.4 AGATION 0.3 tPD- AGATION 00..86 VCC = 5V AGATION 0.3 VCC = 2.1VVCC = 3V PROP 0.2 PROP 0.4 VCC = 3V PROP 0.2 VCC = 5V VCC = 2.1V 0.1 0.2 0.1 0 0 0 0 500 1000 1500 2000 0 50 100 150 200 250 0 50 100 150 200 250 LOAD CAPACITANCE (pF) INPUT OVERDRIVE (mV) INPUT OVERDRIVE (mV) PROPAGATION DELAY PROPAGATION DELAY PROPAGATION DELAY vs. TEMPERATURE (VCC = 2.1V) vs. TEMPERATURE (VCC = 3V) vs. TEMPERATURE (VCC = 5V) ELAY (ns) 334450505000000 ttPPDD+- MAX9075 toc16 ELAY (ns) 456000000 tPD+ MAX9075 toc17 ELAY (ns) 567800000000 tPD+ MAX9075 toc18 D D D TION 250 TION 300 tPD- TION 400 OPAGA 210500 OPAGA 200 OPAGA 300 tPD- R R R P P P 200 100 100 50 100 0 0 0 -55 -35 -15 5 25 45 65 85 -55 -35 -15 5 25 45 65 85 -55 -35 -15 5 25 45 65 85 TEMPERATURE(°C) TEMPERATURE (°C) TEMPERATURE (°C) 4 Maxim Integrated

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Typical Operating Characteristics (continued) (VCC= 5V, VCM= 0V, 100mV overdrive, TA= +25°C, unless otherwise noted.) PROPAGATION DELAY (tPD+) PROPAGATION DELAY (tPD-) MAX9075/7 toc19 MAX9075/7 toc20 VCC = 5V VCC = 5V VIN VIN 50mV/div 50mV/div VOUT 2V/div 2V/div VOUT 100ns/div 100ns//div PROPAGATION DELAY (tPD+) PROPAGATION DELAY (tPD-) MAX9075/7 toc21 MAX9075/7 toc22 VCC = 3V VCC = 3V VIN 50mV/div VIN 50mV/div 1V/div VOUT 1V/div VOUT 100ns/div 100ns/div INPUT BIAS CURRENT TRIANGLE WAVE vs. TEMPERATURE MAX9075/7 toc23 7 VCC = 3V 6 VCC = 5V MAX9075 toc24 A) 50mV/div VIN NT (n 5 VCC = 3V E RR 4 U C BIAS 3 VCC = 2.1V T 1V/div VOUT PU 2 N I 1 0 200μs/div -55 -35 -15 5 25 45 65 85 TEMPERATURE (°C) Maxim Integrated 5

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Pin Description PIN MAX9075 MAX9077 NAME FUNCTION SOT23 SC70 µMAX/SO SOT23 1 1 — — OUT Comparator Output — — 1 1 OUTA Output of Comparator A 2 2 4 2 GND Ground 3 3 — — IN+ Noninverting Comparator Input — — 3 4 INA+ Noninverting Input of Comparator A 4 4 — — IN- Inverting Comparator Input — — 2 3 INA- Inverting Input of Comparator A 5 5 8 8 VCC Positive Supply Voltage — — 5 5 INB+ Noninverting Input of Comparator B — — 6 6 INB- Inverting Input of Comparator B — — 7 7 OUTB Output of Comparator B Detailed Description Applications Information The MAX9075/MAX9077 feature a 580ns propagation Adding Hysteresis delay from an ultra-low supply current of only 3µA per Hysteresis extends the comparator’s noise margin by comparator. These devices are capable of single-sup- increasing the upper threshold and decreasing the ply operation in the 2.1V to 5.5V range. Large internal lower threshold. A voltage divider from the output of the output drivers allow rail-to-rail output swing with up to comparator sets the trip voltage. Therefore, the trip 2mA loads. Both comparators offer a push-pull output voltage is related to the output voltage. Set the hystere- that sinks and sources current. sis with three resistors using positive feedback, as Comparator Output shown in Figure 1. The MAX9075/MAX9077 are designed to maintain a The design procedure is as follows: low-supply current during repeated transitions by limit- 1) Choose R3. The leakage current of IN+ may cause a ing the shoot-through current. small error; however, the current through R3 can be approximately 500nA and still maintain accuracy. Noise Considerations, Comparator Input The added supply current due to the circuit at the The input common-mode voltage range for these devices extends from 0V to VCC - 1.2V. Unlike many trip point is VCC/R3; 10MΩ is a good practical value for R3, as this keeps the current well below the sup- other comparators, the MAX9075/MAX9077 can oper- ply current of the chip. ate at any differential input voltage within these limits. Input bias current is typically -5nA if the input voltage is 2) Choose the hysteresis voltage (VHYS), which is the between the supply rails. voltage between the upper and lower thresholds. In Although the comparators have a very high gain, useful this example, choose VHYS = 50mV and assume gain is limited by noise. The comparator has a wide- VREF= 1.2V and VCC= 5V. band peak-to-peak noise of approximately 70µV. 3) Calculate R1 as follows: R1 = R3 x VHYS/VCC= 10MΩx 0.05/5 = 100kΩ 6 Maxim Integrated

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators 4) Choose the threshold voltage for VINrising (VTHR). In this example, choose VTHR= 3V. VCC 5) Calculate R2 as follows: R3 R2 = 1/{[VTHR/(VREF(cid:3)R1)] - 1/R1 - 1/R3} = R1 1/{[3 / (1.2 (cid:3)100kΩ)] - 1/100kΩ- 1/10MΩ} = 67.114kΩ VIN A 1% preferred value is 64.9kΩ. VCC OUT R2 6) Verify the threshold voltages with these formulas: GND VINrising: MAX9075 VREF MAX9077 VTHR= VREF(cid:3)R1 (1/R1 + 1/R2 + 1/R3) VINfalling: VTHF= VTHR- (R1 (cid:3)VCC)/R3 Figure 1. Adding Hysteresis 7) Check the error due to input bias current (5nA). If the error is too large, reduce R3 and recalculate. Pin Configurations (continued) VTH= IB(R1 (cid:3)R2 (cid:3)R3)/(R1 + R2 + R3) = 0.2mV Board Layout and Bypassing TOP VIEW Use 10nF power-supply bypass capacitors. Use 100nF bypass capacitors when supply impedance is high, when supply leads are long, or when excessive noise is + expected on the supply lines. Minimize signal trace OUTA 1 8 VCC lengths to reduce stray capacitance. Minimize the GND 2 MAX9077 7 OUTB capacitive coupling between IN- and OUT. For slow- moving input signals (rise time > 1ms) use a 1nF INA- 3 6 INB- capacitor between IN+ and IN-. INA+ 4 5 INB+ Chip Information PROCESS: BiCMOS SOT23-8 + OUTA 1 8 VCC INA- 2 MAX9077 7 OUTB INA+ 3 6 INB- GND 4 5 INB+ µMAX/SO Maxim Integrated 7

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. LAND PACKAGE TYPE PACKAGE CODE OUTLINE NO. PATTERN NO. 5 SC70 X5+1 21-0076 90-0188 5 SOT23 U5+1 21-0057 90-0174 8 SOT23 K8+2 21-0078 90-0176 8 µMAX U8+1 21-0036 90-0092 8 S0 S8+4 21-0041 90-0096 8 Maxim Integrated

MAX9075/MAX9077 Low-Cost, Ultra-Small, 3µA Single-Supply Comparators Revision History REVISION REVISION PAGES DESCRIPTION NUMBER DATE CHANGED 0 0/99 Initial release — 3 1/07 Revised Absolute Maximum Ratings 2 Added MAX9077MSA/PR2 to Ordering Information and updated for lead-free 4 12/12 notation. Revised Absolute Maximum Ratings, Electrical Characteristics, and the 1, 2, 6 Noise Considerations, Comparator Input section. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000_________________________________9 © 2012 Maxim Integrated Products, Inc. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M axim Integrated: MAX9075EUK+T MAX9075EXK+T MAX9077EKA+T MAX9077ESA+ MAX9077ESA+T MAX9077EUA+ MAX9077EUA+T MAX9075EUK-T MAX9075EXK-T MAX9077EKA-T MAX9077ESA MAX9077ESA-T MAX9077EKA/GH9-T