Analog Devices Inc./Maxim Integrated MAX306EPI+

Overview

The MAX306EPI+ from Maxim Integrated is a precision, single-ended 1-of-16 CMOS analog multiplexer designed for high-fidelity signal routing in demanding industrial and military systems. It delivers <100Ω on-resistance (max), <5Ω channel-to-channel matching, <10pC charge injection, rail-to-rail analog signal handling (±15V dual or 0–12V single supply), and operates across –40°C to +85°C in a 28-pin PDIP package.

For engineers reviewing the MAX306EPI+ datasheet, MAX306EPI+ pinout, MAX306EPI+ application, or MAX306EPI+ equivalent, key selection criteria include guaranteed on-resistance flatness (≤7Ω), sub-2.5nA NO off-leakage at +85°C, ESD protection >2000V, and plug-in compatibility with industry-standard DG406/DG506A devices.

Technical Context

The MAX306EPI+ implements a monolithic CMOS decoder-multiplexer architecture with four address lines (A0–A3), an active-high enable (EN), and a single bidirectional COM output switching among 16 independent NOx inputs. Its silicon-gate process ensures low charge injection and stable R_ON over temperature and signal voltage range.

All 16 channels share identical switch characteristics: matched R_ON (ΔR_ON ≤ 5Ω), flat R_ON variation (≤7Ω across ±10V), and TTL/CMOS-compatible digital inputs with <1µA input current. Break-before-make timing (10–40ns) prevents signal shorting during channel transitions.

Key Specifications

Pinout & Package

MAX306EPI+ is housed in a 28-pin plastic DIP (PDIP) package with 0.6-inch width, RoHS-compliant lead finish, and through-hole mounting. Pin 12 is GND; pins 1 and 27 are V+ and V− supply rails; pin 28 is the common (COM) output; pins 4–11 and 19–26 are the 16 analog inputs (NO1–NO16); pins 14–17 are address lines A3–A0; pin 18 is EN; pins 2, 3, and 13 are no-connect.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplexer applications.

Compared with MAX306CPI+, the MAX306EPI+ adds assured performance across –40°C to +85°C; compared with ADG406BRZ, it provides tighter R_ON matching, lower leakage, and superior ESD robustness-making it preferable for uncalibrated, high-reliability signal paths.

Availability

MAX306EPI+ is available at Aetrix Electronics and suitable for sample-and-hold circuits, test equipment, and military radio systems requiring stable component supply, long-term lifecycle support, and guaranteed extended-temperature performance.

Supply support for MAX306EPI+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.

The MAX306EPI+ belongs to Maxim's precision analog multiplexer product line, engineered for applications demanding low distortion, high channel uniformity, and robust operation in harsh thermal and ESD environments.

FAQ

What is the maximum analog signal voltage range supported by the MAX306EPI+?

The MAX306EPI+ supports an analog signal range of ±15V when operated from dual supplies (V+ = +15V, V− = −15V), or 0V to +12V when operated from a single +12V supply. The device maintains specified on-resistance and leakage performance across this full range, enabling true rail-to-rail signal handling without clipping or distortion in precision applications.

Does the MAX306EPI+ require external pull-up resistors on its address or enable pins?

No, the MAX306EPI+ does not require external pull-up resistors. Its CMOS digital inputs (A0–A3 and EN) have TTL/CMOS-compatible thresholds (VAL ≤ 0.8V, VAH ≥ 2.4V) and draw less than ±1.0µA input current. Direct connection to microcontroller GPIOs or FPGA outputs is sufficient-no external biasing is needed for reliable logic-level recognition.

Can the MAX306EPI+ be used with unbalanced supply voltages such as +24V and −5V?

Yes, the MAX306EPI+ supports unbalanced supplies. The datasheet explicitly permits configurations like +24V/V− = −5V, provided the difference between V+ and V− does not exceed +44V. In such cases, the analog signal range adjusts accordingly (e.g., −5V to +24V), and all key specifications-including R_ON, leakage, and switching speed-remain valid per the Electrical Characteristics tables.

How does the MAX306EPI+ compare to the industry-standard DG406 in terms of pin compatibility?

The MAX306EPI+ is a direct plug-in upgrade for the DG406. It shares identical pinout, supply voltage ranges, logic thresholds, and functional behavior-including address decoding, enable polarity, and channel mapping. No PCB layout changes are required; users gain improved R_ON matching, lower charge injection, and enhanced ESD protection without redesign effort.

What is the guaranteed maximum on-resistance flatness for the MAX306EPI+ over temperature?

The MAX306EPI+ guarantees on-resistance flatness of ≤10Ω maximum over the full –40°C to +85°C operating range. Flatness is defined as the difference between the highest and lowest R_ON values measured across the specified analog signal range (e.g., ±10V), ensuring consistent gain and minimal harmonic distortion in precision amplifier and filter circuits using the MAX306EPI+.