MAX991:High-Speed, Micropower, Low-Voltage, SOT23, Rail-to-Rail I/O Comparators

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. 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. The MAX987/MAX991/MAX995 have a push-pull output stage that sinks as well as sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX988/MAX992/MAX996 have an open-drain output stage that can be pulled beyond VCC to 6V (max) above VEE. These open-drain versions are ideal for level translators and bipolar to single-ended converters. The single MAX987/MAX988 are available in tiny 5-pin SC70 packages, while the dual MAX991/MAX992 are available in ultra-small 8-pin SOT23 and µMAX® packages.

Key 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)
MAX987, MAX988, MAX991, MAX992, MAX995, MAX996: Typical Operating Circuit
MAX987, MAX988, MAX991, MAX992, MAX995, MAX996: Typical Operating Circuit
Applications/Uses
  • Digital-Line Receivers
  • Ground/Supply Sensing
  • IR Receivers
  • Level Translators
  • Mobile Communications
  • Portable Battery-Powered Systems
  • Threshold Detectors
  • Window Comparators
  • Zero-Crossing Detectors
DataSheet
titleDownload file
MAX987-MAX996 Data SheetMAX987-MAX996.pdf
Parametrics
Part NumberComp-
arators
tPD
(ns)
Input RangeVSUPPLY (Total)
(V)
VSUPPLY (Total)
(V)
ICC per Comp.
(µA)
VOS
(mV)
VOS
(mV)
Logic OutOper. Temp.
(°C)
Package/PinsBudgetary
Price
typminmaxmaxtypmaxSee Notes
MAX9871120Rail to Rail
to Neg. Rail
2.55.5800.55Push-Pull-40 to +85SC-70/5
SOIC(N)/8
SOT/5
$0.74 @1k
MAX9881Open DrainSC-70/5
SOIC(N)/8
SOT/5
$0.74 @1k
MAX9912Push-PullµMAX/8
SOIC(N)/8
SOT/8
$1.35 @1k
MAX9922Open DrainµMAX/8
SOIC(N)/8
SOT/8
$1.17 @1k
MAX9954Push-PullSOIC(N)/14
TSSOP/14
$1.92 @1k
MAX9964Open DrainSOIC(N)/14
TSSOP/14
$1.74 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX991EKA+ActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX991EKA+TActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX991EKA-TNo Longer AvailableMAX991EKA+TSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX991ESANo Longer AvailableMAX991ESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX991ESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX991ESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX991ESA-TNo Longer AvailableMAX991ESA+TSOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX991EUANo Longer AvailableMAX991EUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX991EUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX991EUA+TActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX991EUA-TNo Longer AvailableMAX991EUA+TµMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX987-MAX996.pdf MAX996
Sawtooth Generator Exhibits ~1% Linearity And >80dB Dynamic Frequency Range MAX991
MAX987-MAX996.pdf MAX996