MAX917:SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

Ideal for 2-Cell Battery Monitoring in Portable Equipment

The MAX917–MAX920 nanopower comparators in space-saving SOT23 packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX917/MAX918 feature an on-board 1.245V ±1.5% reference and draw an ultra-low supply current of only 750nA, while the MAX919/MAX920 (without reference) require just 380nA of supply current. These features make the MAX917–MAX920 family of comparators ideal for all 2-cell battery applications, including monitoring/management. The unique design of the output stage 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 MAX917/MAX919 have a push-pull output stage that sinks and sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX918/MAX920 have an open-drain output stage that makes them suitable for mixed-voltage system design.

Key Features
  • Ultra-Low Supply Current
    • 380nA per Comparator (MAX919/MAX920)
    • 750nA per Comparator with Reference (MAX917/MAX918)
  • Guaranteed to Operate Down to +1.8V
  • Internal 1.245V ±1.5% Reference (MAX917/MAX918)
  • Input Voltage Range Extends 200mV Beyond-the-Rails
  • CMOS Push-Pull Output with ±8mA Drive Capability (MAX917/MAX919)
  • Open-Drain Output Versions Available (MAX918/MAX920)
  • Crowbar-Current-Free Switching
  • Internal Hysteresis for Clean Switching
  • No Phase Reversal for Overdriven Inputs
  • Space-Saving SOT23 Package
MAX917, MAX918, MAX919, MAX920: Typical Operating Circuit
MAX917, MAX918, MAX919, MAX920: Typical Operating Circuit
Applications/Uses
  • 2-Cell Battery Monitoring/Management
  • Medical Instruments
  • Mobile Communications
  • Notebooks and PDAs
  • Sensing at Ground or Supply Line
  • Telemetry and Remote Systems
  • Threshold Detectors/Discriminators
  • Ultra-Low-Power Systems
DataSheet
titleDownload file
MAX917-MAX920 Data SheetMAX917-MAX920.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
MAX919122000Rail to Rail
to Neg. Rail
1.85.50.815Push-Pull-40 to +85SOIC(N)/8
SOT/5
$0.66 @1k
MAX920Open DrainSOIC(N)/8
SOT/5

Part NumberComp-
arators
Thresh.
(V)
Internal Ref. Accuracy
(%)
tPD
(µs)
VSUPPLY
(V)
VSUPPLY
(V)
ICC
(µA)
Prog. Hyst.VOS
(mV)
VOS
(mV)
Logic OutOper. Temp.
(°C)
Package/PinsBudgetary
Price
typminmaxmaxtypmaxSee Notes
MAX91711.2451.5221.85.51.3No110TTL/CMOS-40 to +85SOIC(N)/8
SOT/5
$0.95 @1k
MAX918Open DrainSOIC(N)/8
SOT/5
Quality and Environmental Data
Related Products
  • MAX986:Micropower, Low-Voltage, UCSP/SC70, Rail-to-Rail I/O Comparators
  • MAX9077:Low-Cost, Ultra-Small, 3µA Single-Supply Comparators
  • MAX9075:Low-Cost, Ultra-Small, 3µA Single-Supply Comparators
  • MAX966:Single/Dual/Quad, Micropower, Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX917ESANo Longer AvailableMAX917ESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX917ESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX917ESA+TActiveN.SO;8 pin-40°C to +85°CSee data sheet
MAX917ESA-TNo Longer AvailableMAX917ESA+TN.SO;8 pin-40°C to +85°CSee data sheet
MAX917EUKNo Longer AvailableMAX917EUK+SOT,;5 pin;9 mm²-40°C to +85°CNo
MAX917EUK+ActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX917EUK+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX917EUK-TNo Longer AvailableMAX917EUK+TSOT,;5 pin;9 mm²-40°C to +85°CNo
MAX917-MAX920.pdf MAX918
MAX917.pdf MAX917
MAX917-MAX920.pdf MAX920