MAX398, MAX399

Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog Multiplexers

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Active: In Production.


The MAX398/MAX399 precision, monolithic, CMOS analog multiplexers (muxes) offer low on-resistance (less than 100Ω), which is matched to within 6Ω between channels and remains flat over the specified analog signal range (11Ω max). They also offer low leakage over temperature (NO off-leakage current less than 2.5nA at +85°C) and fast switching speeds (transition time less than 250ns). The MAX398 is an 8-channel device, and the MAX399 is a dual 4-channel device.

The MAX398/MAX399 are fabricated with Maxim's low-voltage silicon-gate process. Design improvements yield extremely low charge injection (less than 5pC) and guarantee electrostatic discharge protection (ESD) greater than 2000V.

These muxes operate with a single +3V to +15V supply or bipolar ±3V to ±8V supplies, while retaining CMOS-logic input compatibility and fast switching. CMOS inputs provide reduced input loading. The MAX398/MAX399 are pin compatible with the industry-standard DG408, DG409, DG508A, and DG509A.

Data Sheet

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Key Features

  • Pin Compatible with Industry-Standard DG408/DG409/DG508A/DG509A
  • Guaranteed On-Resistance Match Between Channels (< 6Ω)
  • Low On-Resistance (< 100Ω)
  • Guaranteed Flat On-Resistance over Signal Range (< 11Ω)
  • Guaranteed Low Charge Injection (< 5pC)
  • NO Off-Leakage Current < 1nA at +85°C
  • COM Off-Leakage Current < 2.5nA at +85°C
  • ESD Protection > 2000V
  • +3V to +15V Single-Supply Operation ±3V to ±8V Bipolar-Supply Operation
  • Low Power Consumption (< 300µW)
  • Rail-to-Rail Signal Handling
  • TTL/CMOS-Logic Compatible


  • Audio-Signal Routing
  • Automated Test Equipment (ATE)
  • Battery-Powered Applications
  • Communication Systems
  • Guidance and Control Systems
  • Heads-Up Displays
  • Low-Voltage Data Acquisition
  • Military Radios
  • Sample-and-Hold Circuits

Key Specifications:

Switches and Multiplexers (Mid and High Voltage)
Part Number Functions Config. Channels VSUPPLY (Single)
VSUPPLY (Single)
min max min max max max min max See Notes
MAX398  Mux 8-to-1 1 3 15 3 8 100 1 150 150 5 54 11 $2.98 @1k
MAX399  4-to-1 2 34 $2.68 @1k
See All Switches and Multiplexers (Mid and High Voltage) (312)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX398, MAX399: Pin Configuration
Pin Configuration

Notes and Comments

Low-voltage, DG408 pinout (MAX398)
Low-voltage, DG409 pinout (MAX399)

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Document Ref.: 19-0299 Rev 6; 2008-07-01
This page last modified: 2009-11-10