19-1266; Rev 0b; 7/97 High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators The single MAX987/MAX988 are available in tiny 5-pin SOT23 packages. _____________________Selector Guide PART COMPARATORS PER PACKAGE OUTPUT STAGE PINPACKAGE MAX987 1 Push/Pull 8 SO/ 5 SOT23-5 MAX988 1 Open-Drain 8 SO/ 5 SOT23-5 MAX991 2 Push/Pull 8 SO/µMAX MAX992 2 Open-Drain 8 SO/µMAX MAX995 4 Push/Pull 14 SO MAX996 4 Open-Drain 14 SO ________________________Applications Portable/BatteryPowered Systems Mobile Communications Zero-Crossing Detectors Window Comparators Level Translators Threshold Detectors/ Discriminators Ground/Supply Sensing IR Receivers Digital Line Receivers ____________________________Features ♦ 120ns Propagation Delay ♦ 48µA Quiescent Supply Current ♦ +2.5V to +5.5V Single-Supply Operation ♦ Common-Mode Input Voltage Range Extends 250mV Beyond the Rails ♦ Push/Pull Output Stage Sinks and Sources 8mA Current (MAX987/MAX991/MAX995) ♦ Open-Drain Output Voltage Extends Beyond VCC (MAX988/MAX992/MAX996) ♦ Unique Output Stage Reduces Output Switching Current, Minimizing Overall Power Consumption ♦ 100µA Supply Current at 1MHz Switching Frequency ♦ No Phase Reversal for Overdriven Inputs ♦ Available in Space-Saving Packages: 5-Pin SOT23 (MAX987/MAX988) 8-Pin µMAX (MAX991/MAX992) ______________Ordering Information PART TEMP. RANGE PINPACKAGE SOT TOP MARK MAX987EUK-T -40°C to +85°C 5 SOT23-5 ABZB MAX987ESA MAX988EUK-T MAX988ESA -40°C to +85°C -40°C to +85°C -40°C to +85°C 8 SO 5 SOT23-5 8 SO — ABZC — Ordering Information continued at end of data sheet. Typical Application Circuit appears at end of data sheet. _________________Pin Configurations TOP VIEW OUT 1 VCC 2 IN+ 3 5 VEE 4 IN- MAX987 MAX988 SOT23 Pin Configurations continued at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 _______________General Description The MAX987/MAX988/MAX991/MAX992/MAX995/ MAX996 single/dual/quad micropower comparators feature low-voltage operation and Rail-to-Rail® inputs and outputs. Their operating voltage ranges from +2.5V to +5.5V, making them ideal for both 3V and 5V systems. These comparators also operate with ±1.25V to ±2.75V dual supplies. They consume only 48µA per comparator while achieving a 120ns propagation delay. The common-mode input voltage range extends 250mV beyond the supply rails. Input bias current is typically 1.0pA, and input offset voltage is typically 0.5mV. Internal hysteresis ensures clean output switching, even with slow-moving input signals. The output stage’s unique design limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX987/MAX991/MAX995 have a push/pull output stage that sinks as well as sources current. Large internal output drivers allow railto-rail output swing with loads up to 8mA. The MAX988/MAX992/MAX996 have an open-drain output stage that can be pulled beyond V CC to 6V (max) above VEE. These open-drain versions are ideal for level translators and bipolar to single-ended converters. MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to VEE) ...................................................6V IN_-, IN_+ to VEE .......................................-0.3V to (VCC + 0.3V) OUT_ to VEE MAX987/MAX991/MAX995 ....................-0.3V to (VCC + 0.3V) MAX988/MAX992/MAX996.....................................-0.3V to 6V OUT_ Short-Circuit Duration to VEE or VCC .......................10sec Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 7.10mW/°C above +70°C)...........571mW 8-Pin SO (derate 5.88mW/°C above +70°C).................471mW 8-Pin µMAX (derate 4.10mW/°C above +70°C) ............330mW 14-Pin SO (derate 8.33 mW/°C above +70°C)..............667mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300°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 (Note 1) (VCC = +2.7V to +5.5V, VEE = 0V, VCM = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Supply Voltage Supply Current per Comparator Power-Supply Rejection Ratio Common-Mode Voltage Range (Note 2) Input Offset Voltage (Note 3) Input Hysteresis SYMBOL VCC CONDITIONS VCC = 5V VOS Full common-mode range 48 80 µA 96 55 80 VEE 0.25 TA = -40°C to +85°C V 80 TA = -40°C to +85°C TA = +25°C UNITS 5.5 96 TA = +25°C 2.5V ≤ VCC ≤ 5.5V MAX 53 TA = -40°C to +85°C VCC = 2.7V VCMR TYP 2.5 TA = +25°C ICC PSRR MIN Inferred from PSRR test VEE TA = +25°C dB VCC + 0.25 V VCC ±0.5 TA = -40°C to +85°C ±5 ±7 mV VHYST ±2.5 IB 0.001 Input Offset Current IOS 0.5 Input Capacitance CIN 1.0 pF 80 dB Input Bias Current (Note 4) Common-Mode Rejection Ratio CMRR Output Leakage Current (MAX988/MAX992/ MAX996 only) ILEAK Output Short-Circuit Current OUT Output Voltage Low OUT Output Voltage High (MAX987/MAX991/ MAX995 only) 2 ISC VOL VOH 50 VOUT = high mV 10 pA 1.0 Sourcing or sinking, VOUT = VEE or VCC VCC = 5V 95 VCC = 2.7V 35 VCC = 5V, ISINK = 8mA TA = +25°C 0.2 VCC = 2.7V, ISINK = 3.5mA TA = +25°C VCC = 5V, ISOURCE = 8mA TA = +25°C 4.6 TA = -40°C to +85°C 4.45 VCC = 2.7V, ISOURCE = 3.5mA TA = +25°C 2.4 TA = -40°C to +85°C 2.3 TA = -40°C to +85°C TA = -40°C to +85°C µA mA 0.4 0.55 0.15 nA 0.3 V 0.4 4.85 2.55 _______________________________________________________________________________________ V High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators (VCC = +2.7V to +5.5V, VEE = 0V, VCM = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL OUT Rise Time (MAX987/MAX991/ MAX995 only) tRISE OUT Fall Time tFALL tPDPropagation Delay tPD+ Power-Up Time tPU CONDITIONS VCC = 5.0V VCC = 5.0V MIN TYP CL = 15pF 15 CL = 50pF 20 CL = 200pF 40 CL = 15pF 15 CL = 50pF 20 CL = 200pF 40 MAX987/MAX991/ 10mV overdrive MAX995 only 100mV overdrive 210 CL = 15pF, MAX988/MAX992/ 10mV overdrive VCC = 5V MAX996 only, RPULL-UP = 5.1kΩ 100mV overdrive MAX987/MAX991/MAX995 only, CL = 15pF, VCC = 5V MAX UNITS ns ns 120 210 ns 120 10mV overdrive 210 100mV overdrive 120 25 µs Note 1: The MAX98 _EUK specifications are 100% tested at TA = +25°C. Limits over the extended temperature range are guaranteed by design, not production tested. Note 2: Inferred from the VOS test. Either or both inputs can be driven 0.3V beyond either supply rail without output phase reversal. Note 3: VOS is defined as the center of the hysteresis band at the input. Note 4: IB is defined as the average of the two input bias currents (IB-, IB+). _______________________________________________________________________________________ 3 MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 ELECTRICAL CHARACTERISTICS (continued) __________________________________________Typical Operating Characteristics (VCC = 5V, VCM = 0V, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT PER COMPARATOR vs. TEMPERATURE 80 70 VCC = 5.5.V 60 50 VCC = 2.5.V MAX987 TOC2 1000 SUPPLY CURRENT (µA) VIN+ > VIN- SUPPLY CURRENT (µA) SUPPLY CURRENT PER COMPARATOR vs. OUTPUT TRANSITION FREQUENCY MAX9879 TOC1 90 VCC = 5.5V 100 VCC = 2.5V 40 30 10 -40 -20 0 20 40 60 80 100 0.01 TEMPERATURE (°C) VIN+ > VINOUTPUT HIGH VOLTAGE (mV) (VCC - VOH) 1000 VCC = 2.7V VCC = 5.0V 1 0.1 1 100 1000 10,000 VIN+ < VIN1000 0.1 0.01 10 10,000 OUTPUT LOW VOLTAGE (mV) (VOL) MAX987-04 10,000 10 1 OUTPUT LOW VOLTAGE vs. OUTPUT SINK CURRENT OUTPUT HIGH VOLTAGE vs. OUTPUT SOURCE CURRENT 100 0.1 OUTPUT TRANSITION FREQUENCY (kHz) 10 MAX987-03a -60 VCC = 2.7V 100 VCC = 5.0V 10 1 100 0.01 OUTPUT SOURCE CURRENT (mA) 0.1 1 10 100 OUTPUT SINK CURRENT (mA) OUTPUT SHORT-CIRCUIT CURRENT vs. TEMPERATURE INPUT OFFSET VOLTAGE vs. TEMPERATURE 80 70 60 50 40 30 0.9 OFFSET VOLTAGE (mV) VCC = 5.0V MAX987 06 110 100 90 0.7 0.5 0.3 0.1 VCC = 2.7V 20 10 -0.1 0 -0.3 -60 -40 -20 0 20 40 TEMPERATURE (°C) 4 1.1 MAX987 05 120 OUTPUT SINK CURRENT (mA) MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators 60 80 100 -60 -40 -20 0 20 40 60 TEMPERATURE (°C) _______________________________________________________________________________________ 80 100 High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators (VCC = 5V, VCM = 0V, TA = +25°C, unless otherwise noted.) 1000 VOD = 50mV 190 PROPAGATION DELAY (ns) VOD = 50mV PROPAGATION DELAY (ns) 200 MAX987 TOC8 10,000 MAX987 TOC9 PROPAGATION DELAY vs. TEMPERATURE PROPAGATION DELAY vs. CAPACITIVE LOAD 180 170 VCC = 2.5.V 160 150 140 VCC = 5.5.V 130 120 110 100 0.01 100 0.1 1 10 100 1000 -40 -20 0 20 40 60 80 TEMPERATURE (°C) PROPAGATION DELAY vs. INPUT OVERDRIVE MAX987/MAX991/MAX995 PROPAGATION DELAY (tPD+) 100 MAX987-11 MAX987 TOC10 300 250 PROPAGATION DELAY (ns) -60 CAPACITIVE LOAD (nF) VOD = 50mV IN+ 50mV/ div OUT 2V/div 200 VCC = 2.5V 150 VCC = 5.5V 100 50 0 0 20 40 60 80 100 120 100ns/div 140 INPUT OVERDRIVE (mV) MAX987/MAX991/MAX995 SWITCHING CURRENT, OUT RISING PROPAGATION DELAY (tPD-) MAX987-12 MAX987-13 VOD = 50mV 50mV/ div IN+ 50mV/ div IN+ 2V/div OUT 2V/div OUT 2mA/div ICC VOD = 50mV 100ns/div 200ns/div _______________________________________________________________________________________ 5 MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 __________________________________________Typical Operating Characteristics MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators ____________________________Typical Operating Characteristics (continued) (VCC = 5V, VCM = 0V, TA = +25°C, unless otherwise noted.) 1MHZ RESPONSE SWITCHING CURRENT, OUT FALLING MAX987-15 MAX987-14 VOD = 50mV IN+ 50mV/ div OUT 2V/div ICC 2mA/div IN+ 50mV/ div OUT 2V/div VOD = 50mV 200ns/div 200ns/div POWER-UP DELAY MAX987-16 VIN- = 50mV VIN+ = 0V 2V/div VCC 2V/div OUT 5µs/div 6 _______________________________________________________________________________________ High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators PIN MAX987 MAX988 MAX991 MAX996 MAX995 MAX996 NAME FUNCTION SOT23-5 SO SO/µMAX SO 1 6 — — OUT Comparator Output 2 7 8 4 VCC Positive Supply Voltage 3 3 — — IN+ Comparator Noninverting Input 4 2 — — IN- Comparator Inverting Input 5 4 4 11 VEE Negative Supply Voltage — — 1 1 OUTA — — 2 2 INA- Comparator A Inverting Input — — 3 3 INA+ Comparator A Noninverting Input — — 5 5 INB+ Comparator B Noninverting Input — — 6 6 INB- Comparator B Inverting Input — — 7 7 OUTB Comparator B Output — — — 8 OUTC Comparator C Output — — — 9 INC- Comparator C Inverting Input — — — 10 INC+ Comparator C Noninverting Input — — — 12 IND+ Comparator D Noninverting Input — — — 13 IND- Comparator D Inverting Input — — — 14 OUTD — 1, 5, 8 — — N.C. Comparator A Output Comparator D Output No Connection. Not internally connected. _______________________________________________________________________________________ 7 MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 ______________________________________________________________Pin Description MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators _______________Detailed Description __________Applications Information The MAX987/MAX988/MAX991/MAX992/MAX995/ MAX996 are single/dual/quad low-power, low-voltage comparators. They have an operating supply voltage range between +2.5V and +5.5V and consume only 48µA per comparator, while achieving 120ns propagation delay. Their common-mode input voltage range extends 0.25V beyond each rail. Internal hysteresis ensures clean output switching, even with slow-moving input signals. Large internal output drivers allow rail-torail output swing with up to 8mA loads. The output stage employs a unique design that minimizes supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. The MAX987/MAX991/MAX995 have a push/pull output structure that sinks as well as sources current. The MAX988/MAX992/MAX996 have an opendrain output stage that can be pulled beyond VCC to an absolute maximum of 6V above VEE. Additional Hysteresis Input Stage Circuitry The devices’ input common-mode range extends from -0.25V to (VCC + 0.25V). These comparators may operate at any differential input voltage within these limits. Input bias current is typically 1.0pA if the input voltage is between the supply rails. Comparator inputs are protected from overvoltage by internal body diodes connected to the supply rails. As the input voltage exceeds the supply rails, these body diodes become forward biased and begin to conduct. Consequently, bias currents increase exponentially as the input voltage exceeds the supply rails. Output Stage Circuitry These comparators contain a unique output stage capable of rail-to-rail operation with up to 8mA loads. Many comparators consume orders of magnitude more current during switching than during steady-state operation. However, with this family of comparators, the supply-current change during an output transition is extremely small. The Typical Operating Characteristics graph Supply Current vs. Output Transition Frequency shows the minimal supply-current increase as the output switching frequency approaches 1MHz. This characteristic eliminates the need for power-supply filter capacitors to reduce glitches created by comparator switching currents. Battery life increases substantially in high-speed, battery-powered applications. MAX987/MAX991/MAX995 The MAX987/MAX991/MAX995 have ±2.5mV internal hysteresis. Additional hysteresis can be generated with three resistors using positive feedback (Figure 1). Unfortunately, this method also slows hysteresis response time. Use the following procedure to calculate resistor values for the MAX987/MAX991/MAX995. 1) Select R3. Leakage current at IN is under 10nA; therefore, the current through R3 should be at least 1µA to minimize errors caused by leakage current. The current through R3 at the trip point is (VREF VOUT) / R3. Considering the two possible output states and solving for R3 yields two formulas: R3 = V REF / 1µA or R3 = (V REF - V CC) / 1µA. Use the smaller of the two resulting resistor values. For example, if VREF = 1.2V and VCC = 5V, then the two R3 resistor values are 1.2MΩ and 3.8MΩ. Choose a 1.2MΩ standard value for R3. 2) Choose the hysteresis band required (VHB). For this example, choose 50mV. 3) Calculate R1 according to the following equation: R1 = R3 x (VHB / VCC) For this example, insert the values R1 = 1.2MΩ x (50mV / 5V) = 12kΩ. 4) Choose the trip point for VIN rising (VTHR; VTHF is the trip point for VIN falling). This is the threshold voltage at which the comparator switches its output from low to high as VIN rises above the trip point. For this example, choose 3V. VCC R3 R1 0.1µF VIN VCC R2 OUT VEE VREF MAX987 MAX991 MAX995 Figure 1. Additional Hysteresis (MAX987/MAX991/MAX995) 8 _______________________________________________________________________________________ High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators R2 = 1 = 8.03kΩ 1 1 3.0V − − 12kΩ 2.2MΩ 1.2 x 12kΩ 6) Verify trip voltages and hysteresis as follows: 1 1 1 VIN rising: VTHR = VREF x R1 x + + R2 R3 R1 R1 x VCC VIN falling : VTHF = VTHR − R3 Use the following procedure to calculate resistor values: 1) Select R3 according to the formulas R3 = VREF / 1µA or R3 = (VREF - VCC) / 1µA - R4. Use the smaller of the two resulting resistor values. 2) Choose the hysteresis band required (VHB). For this example, choose 50mV. 3) Calculate R1 according to the following equation: R1 = (R3 + R4) x (VHB / VCC) 4) Choose the trip point for VIN rising (VTHR; VTHF is the trip point for VIN falling). This is the threshold voltage at which the comparator switches its output from low to high as VIN rises above the trip point. 5) Calculate R2 as follows: R2 = Hysteresis = VTHR − VTHF MAX988/MAX992/MAX996 The MAX988/MAX992/MAX996 have ±2.5mV internal hysteresis. They have open-drain outputs and require an external pull-up resistor (Figure 2). Additional hysteresis can be generated using positive feedback, but the formulas differ slightly from those of the MAX987/MAX991/MAX995. 1 VTHR 1 1 − − V R1 R 3 + R4 REF x R1 6) Verify trip voltages and hysteresis as follows: VIN rising: VTHR = VREF x R1 x 1 1 1 + + R2 R3 + R4 R1 R1 x VCC VIN falling : VTHF = VTHR − R3 + R4 Hysteresis = VTHR − VTHF VCC R3 Circuit Layout and Bypassing 0.1µF R4 R1 VIN VCC R2 OUT VEE VREF MAX988 MAX992 MAX996 Figure 2. Additional Hysteresis (MAX988/MAX992/MAX996) These comparators’ high-gain bandwidth requires design precautions to maximize their high-speed capability. The recommended precautions are: 1) Use a printed circuit board with an unbroken, lowinductance ground plane. 2) Place a decoupling capacitor (a 0.1µF ceramic capacitor is a good choice) as close to V CC as possible. 3) On the inputs and outputs, keep lead lengths short to avoid unwanted parasitic feedback around the comparators. 4) Solder the devices directly to the printed circuit board instead of using a socket. _______________________________________________________________________________________ 9 MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 5) Calculate R2 as shown. For this example, choose an 8.2kΩ standard value: 1 R2 = VTHR 1 1 V − R1 − R 3 REF x R1 MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators Zero-Crossing Detector Logic-Level Translator Figure 3 shows a zero-crossing detector application. The MAX987’s inverting input is connected to ground, and its noninverting input is connected to a 100mVp-p signal source. As the signal at the noninverting input crosses 0V, the comparator’s output changes state. Figure 4 shows an application that converts 5V logic levels to 3V logic levels. The MAX988 is powered by the +5V supply voltage, and the pull-up resistor for the MAX988’s open-drain output is connected to the +3V supply voltage. This configuration allows the full 5V logic swing without creating overvoltage on the 3V logic inputs. For 3V to 5V logic-level translation, simply connect the +3V supply to VCC and the +5V supply to the pull-up resistor. +5V (+3V) VCC 0.1µF 0.1µF +3V (+5V) 2 2 100k VCC 100mV 4 IN+ VCC 4 RPULL-UP IN- OUT 1 OUT 3V (5V) LOGIC OUT 1 100k 3 IN- 3 IN+ MAX987 MAX988 VEE VEE 5 5 5V (3V) LOGIC IN Figure 3. Zero-Crossing Detector Figure 4. Logic-Level Translator _____________________________________________Pin Configurations (continued) TOP VIEW N.C. 1 IN- 2 IN+ 3 MAX987 MAX988 VEE 4 SO 8 N.C. OUTA 1 7 VCC INA- 2 6 OUT INA+ 3 5 N.C. VEE 4 MAX991 MAX992 SO/µMAX 8 VCC 7 OUTB 6 INB- 5 INB+ OUTA 1 14 OUTD INA- 2 13 IND12 IND+ INA+ 3 VCC 4 INB+ 5 MAX995 MAX996 10 INC+ INB- 6 9 INC- OUTB 7 8 OUTC SO 10 11 VEE ______________________________________________________________________________________ High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators _Ordering Information (continued) TEMP. RANGE PINPACKAGE MAX991ESA -40°C to +85°C 8 SO — MAX991EUA MAX992ESA MAX992EUA MAX995ESD MAX996ESD -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 8 µMAX 8 SO 8 µMAX 14 SO 14 SO — — — — — VCC PART VIN 0.1µF VCC *RPULL-UP IN+ OUT SOT TOP MARK IN- MAX98_ MAX99_ VEE VREF * MAX988/MAX992/MAX996 ONLY THRESHOLD DETECTOR __________________________________________________Tape-and-Reel Information 4.0 ±0.1 1.0 ±0.1 2.0 ±0.05 1.5 +0.1/-0.0 DIAMETER 1.75 ±0.1 A 3.5 ±0.05 8.0 ±0.3 2.2 ±0.1 0.5 RADIUS TYPICAL 4.0 ±0.1 A0 A Bo 0.30 ±0.05 0.8 ±0.05 1.0 MINIMUM Ko Ao = 3.1mm ±0.1 Bo = 2.7mm ±0.1 Ko = 1.2mm ±0.1 NOTE: DIMENSIONS ARE IN MM. AND FOLLOW EIA481-1 STANDARD. 0.30R MAX. ______________________________________________________________________________________ 11 MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 ________Typical Application Circuit SOT5L.EPS ________________________________________________________Package Information 8LUMAXD.EPS MAX987/MAX988/MAX991/MAX992/MAX995/MAX996 High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.