Not Recommended for New Designs This product was manufactured for Maxim by an outside wafer foundry using a process that is no longer available. It is not recommended for new designs. The data sheet remains available for existing users. A Maxim replacement or an industry second-source may be available. Please see the QuickView data sheet for this part or contact technical support for assistance. For further information, contact Maxim’s Applications Tech Support. 19-2399; Rev 2; 6/90 Single/Dual, Very Fast TTL Output Comparators Features ♦ 6ns Propagation Delay ♦ 2ns Latch Setup Time ♦ +5V, -5.2V Power Supplies ♦ Pin Compatible to LT1016, Am686 ♦ Available in Commercial and Military Versions ♦ Available in SO Ordering Information PART When the latch enable input goes high, the outputs go to the states defined by the input condition at the time of the latch transition. The outputs remain latched as long as the LE pin remains high. If the latch enable function is not used, the LE pin must be tied to ground. Applications High-Speed Analog-to-Digital Converters High-Speed Line Receivers TEMP RANGE PIN-PACKAGE* MAX9686CPA 0°C to +70°C 8 Plastic Dip MAX9686CJA 0°C to +70°C 8 CERDIP MAX9686CSA 0°C to +70°C 8 SO MAX9686C/D 0°C to +70°C Dice MAX9686CTV 0°C to +70°C 8 TO-99 Metal Can MAX9686MJA -55°C to +125°C 8 CERDIP MAX9686MTV -55°C to +125°C 8 TO-99 Metal Can MAX9698CPE 0°C to +70°C 16 Plastic Dip 16 CERDIP MAX9698CJE 0°C to +70°C Peak Detectors MAX9698CSE 0°C to +70°C 16 SO Threshold Detectors MAX9698C/D 0°C to +70°C Dice MAX9698MJE -55°C to +125°C High-Speed Triggers 16 CERDIP *Contact factory for availability of 20-lead LCC. Pin Configurations TOP VIEW OUT 8 + V V+ 1 8 OUT +IN 2 7 OUT 1 7 +IN 2 -IN 3 V- 4 OUT 5 LE PLASTIC DIP, CERDIP, SO -IN 16 Q2 Q1 2 15 Q2 GND 3 14 GND LE1 4 13 LE2 N.C. 5 12 N.C. 6 GND 6 GND MAX9686 Q1 1 3 MAX9686 5 4 V TO-99 METAL CAN LE V- 6 11 V+ 10 -IN2 -IN1 7 9 +IN2 +IN1 8 MAX9698 PLASTIC DIP, CERDIP, SO ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX9686/MAX9698 General Description The MAX9686 (single)/MAX9698 (dual) are very fast TTL comparators manufactured with a high-frequency bipolar process (fT = 6GHz) that are capable of very short propagation delays, yet maintain the excellent DC matching characteristics that are normally found only in slower comparators. The MAX9698 is a dual version of the MAX9686. The MAX9686/MAX9698 have differential inputs and complementary outputs that are fully compatible with TTL logic levels. The extremely short propagation delays allow signal processing at frequencies in excess of 200MHz. MAX9686/MAX9698 Single/Dual, Very Fast TTL Output Comparators ABSOLUTE MAXIMUM RATINGS Supply Voltages.....................................................................±6V Power Dissipation (Notes 1, 2).........................................336mW Input Voltages........................................................................±5V Differential Input Voltages ........................................................5V Output Current ....................................................................20mA Operating Temperature Ranges: Commercial (MAX9686C/MAX9698M) ................0°C to +70°C Military (MAX9686M/MAX9698M) ...................-55°C to +125°C Storage Temperature Range .............................-55°C to +150°C Lead Temperature (soldering, 10s)....................................300°C Note 1: Power derating above TA = +70°C is based on a maximum junction temperature of +150°C and the following thermal resistance factors. Note 2: Continuous short-circuit protection is allowed to the following case and ambient temperatures: for MAX9698, continuous short circuit is allowed on one comparator at a time up to case temperature of +85°C and ambient temperatures of +30°C. PACKAGE θJC (°C/W) θJA (°C/W) PACKAGE TC (°C) TA (°C) DIP 75 180 DIP 110 70 SO 115 180 SO 95 70 TO-99 115 150 TO-99 95 30 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 (VS = ±5V, TA = +25°C, unless otherwise noted.) PARAMETER Input Offset Voltage Temperature Coefficient Input Offset Current Input Bias Current SYMBOL VOS CONDITIONS RS = 100Ω MAX9686C/9698C MIN TYP -3 ∆VOS/∆T MAX9686M/9698M MAX MIN +3 -3 4 TYP MAX +3 4 UNITS mV µV/°C IOS 5.0 5.0 µA IB 25 25 µA Common-Mode Rejection Ratio CMRR Power-Supply Rejection Ratio PSRR 80 96 70 85 Input Voltage Range -3.0 Latch High Input Voltage 2.0 +3.0 80 96 70 85 -3.0 dB dB +3.0 2.0 V V Latch Low Input Voltage 0.8 0.8 V Latch Low Input Current -750 -750 µA I/O Logic Levels (Output High Voltage) VOH IOUT = -3mA I/O Logic Levels (Output Low Voltage) VOL IOUT = 8mA Positive Supply Current ICC Negative Supply Current IEE 2 2.4 3.0 2.4 3.0 0.5 V 0.5 MAX9686 16 25 16 25 MAX9698 32 50 32 50 MAX9686 13 20 13 20 MAX9698 26 40 26 40 _______________________________________________________________________________________ V mA mA Single/Dual, Very Fast TTL Output Comparators (VS = ±5V, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL MAX9686C/9698C CONDITIONS MIN TYP MAX MAX9686M/9698M MIN TYP MAX UNITS SWITCHING CHARACTERISTICS (EACH COMPARATOR FOR MAX9698) Propagation Delays (Guaranteed Over Full Temperature Range) Input to Output High tpd+ 100mV pulse; 10mV overdrive 6.0 9.0 6.0 9.0 ns Input to Output Low tpd- 100mV pulse; 10mV overdrive 5.7 8.5 5.7 8.5 ns Propagation Delay Skew tpd+ - tpd- 0.3 0.3 ns tS 2 2 ns Latch Setup LATCH ENABLE LATCH 50% COMPARE ts tpw(E) th DIFFERENTIAL INPUT VOLTAGE VIN VOD VOS tpd(E) tpd Q 50% 50% Q MAX9686 and MAX9698 Timing Diagram (worst case) Applications Information Layout Because of the large gain-bandwidth characteristic of the MAX9686 and MAX9698, special precautions need to be taken if the high-speed capabilities of the devices are to be realized. A PC board with ground plane should be considered mandatory. All decoupling capacitors should be mounted as close as possible to the power-supply pins. For low-impedance applications, microstrip layout at the input may be helpful. Close attention should be paid to the bandwidth of the decoupling and terminating components. Chip components to minimize lead inductance can be used as an advantage. An unused latch enable pin must be connected to ground. Input Slew-Rate Requirements As with all high-speed comparators, the high gainbandwidth product of these devices creates oscillation problems when the input traverses through the linear region. For clean switching without oscillation or steps in the output waveform, the input must meet certain minimum slew-rate requirements. The tendency of the part to oscillate is a function of the layout and the source impedance of the circuit employed. Both poor layout and larger source impedance will increase the minimum slew-rate requirement. _______________________________________________________________________________________ 3 MAX9686/MAX9698 ELECTRICAL CHARACTERISTICS (continued) MAX9686/9698 Single/Dual, Very Fast TTL Output Comparators Definition of Terms VOS VIN VOD tpd+ tpd- tpd+(E) Input Offset Voltage—The voltage required between the input terminals to obtain 0V dif ferential at the output. Input Voltage Pulse Amplitude Input Voltage Overdrive Input to Output High Delay—The propagation delay measured from the time the input sig nal crosses the input offset voltage to the 50% point of an output LOW to HIGH transition. Input to Output Low Delay—The propagation delay measured from the time the input sig nal crosses the input offset voltage to the 50% point of an output HIGH to LOW transition. Latch Enable to Output High Delay—The propagation delay measured from the 50% point of the Latch-Enable signal HIGH LOtransition to the 50% point of an output LOW to HIGH transition. tpd-(E) Latch Enable to Output Low Delay—The prop agation delay measured from the 50% point of the Latch-Enable signal HIGH to LOW transition to the 50% point of an output HIGH to LOW transition. tpw(E) Minimum Latch Enable Pulse Width—The minimum time the Latch-Enable signal must be LOW to acquire and hold an input signal. Minimum Setup Time—The minimum time, before the positive transition of the LatchEnable pulse, that an input signal must be present to be acquired and held at the outputs. ts tn Minimum Hold Time—The minimum time, after the positive transition of the LatchEnable signal, than an input signal must remain unchanged to be acquired and held at the output. 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. 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.