Analog Devices Inc./Maxim Integrated MAX308CSE+T

Overview

MAX308CSE+T from Maxim Integrated is a precision 8-channel single-ended CMOS analog multiplexer with on-resistance <100Ω, on-resistance matching <5Ω between channels, and guaranteed flatness of ≤7Ω over ±10V signal range. It operates from +5V to +30V single supply or ±5V to ±20V dual supplies, features <10pC charge injection, and targets high-accuracy signal routing in test equipment and military radios.

For engineers reviewing the MAX308CSE+T datasheet, MAX308CSE+T pinout, MAX308CSE+T application, or MAX308CSE+T equivalent, key selection criteria include rail-to-rail analog signal handling (±10V), NO-off leakage <5nA at +85°C, enable-controlled switching with tON(EN) <600ns, and compatibility with TTL/CMOS logic inputs.

Technical Context

The MAX308CSE+T implements a CMOS decode logic architecture with three address lines (A0–A2) and an active-low enable (EN) controlling connection of one of eight NOx inputs to the bidirectional COM terminal. Its silicon-gate process ensures low charge injection (<10pC) and ESD protection >2000V, critical for sample-and-hold integrity.

It supports both unipolar and bipolar operation without external level-shifting: V+ and V− pins accept asymmetric supplies (e.g., +24V/−5V), and analog signals swing rail-to-rail within the supply rails. Leakage performance is fully specified and tested at +85°C, with NO-off leakage <5nA and COM-on leakage <5nA.

Key Specifications

Pinout & Package

MAX308CSE+T is housed in a 16-pin narrow SOIC (Small Outline Integrated Circuit) package, 3.9mm width, with standard JEDEC MS-012AC footprint and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TMUX1308PWR, the MAX308CSE+T uniquely delivers guaranteed on-resistance flatness (<7Ω), sub-10pC charge injection, and full ±20V dual-supply operation - making it the only option qualified for high-accuracy, wide-temperature, wide-voltage analog multiplexing in defense and test systems.

Availability

MAX308CSE+T is available at Aetrix Electronics and suitable for automatic test equipment, military radio signal routing, and precision sample-and-hold circuits requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX308CSE+T 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) designs high-performance analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.

The MAX308/MAX309 product line was engineered specifically for precision analog signal routing in environments requiring low leakage, low distortion, and guaranteed parameter matching - targeting military, aerospace, and automated test systems.

FAQ

What supply configurations does the MAX308CSE+T support?

The MAX308CSE+T operates from a single +5V to +30V supply (with V− tied to GND) or bipolar ±5V to ±20V supplies. It also supports unbalanced supplies like +24V/−5V. The device maintains TTL/CMOS logic compatibility and full analog signal range (±10V) across all supported configurations. This flexibility allows direct integration into legacy industrial systems and modern low-power designs without external level-shifting circuitry.

How does the MAX308CSE+T ensure signal integrity in sample-and-hold applications?

The MAX308CSE+T ensures signal integrity in sample-and-hold applications primarily through its guaranteed charge injection of <10pC and low on-resistance matching (<5Ω). These specifications minimize voltage glitches on the hold capacitor and prevent gain mismatch between channels. Additionally, its flat on-resistance (<7Ω over ±10V) maintains consistent settling behavior across the full input range - critical for achieving 16-bit effective resolution in precision data acquisition systems using the MAX308CSE+T.

Is the MAX308CSE+T pin-compatible with the DG408?

Yes, the MAX308CSE+T is a plug-in upgrade for the industry-standard DG408, sharing identical pinout, function mapping, and package outline (16-pin SOIC). No PCB changes are required. However, the MAX308CSE+T improves upon the DG408 with lower on-resistance (<100Ω vs. ~120Ω), tighter channel matching (<5Ω vs. ~15Ω), and significantly reduced charge injection (<10pC vs. ~25pC), delivering measurable performance gains without layout modification.

What is the maximum analog signal range supported by the MAX308CSE+T?

The MAX308CSE+T supports a maximum analog signal range of ±10V when operated with ±15V supplies, and scales linearly with supply voltage - e.g., ±5V with ±10V supplies. With single +12V supply, the range is 0V to +12V. The device guarantees rail-to-rail signal handling, meaning input signals may extend from V− to V+ without clipping or increased distortion, provided the absolute maximum ratings (e.g., V+ ≤ 44V above V−) are respected.

Does the MAX308CSE+T require external protection against ESD or overvoltage?

No, the MAX308CSE+T incorporates on-chip ESD protection rated >2000V HBM and internal clamping diodes on all analog and digital pins. For overvoltage conditions exceeding absolute maximum ratings (e.g., V+ > 44V above V−), external protection such as series diodes may be added - but this reduces analog range by ~1V and is not required under normal operation. The MAX308CSE+T's integrated protection eliminates the need for discrete TVS diodes or RC filters in most industrial and military deployments.