Analog Devices Inc./Maxim Integrated MAX308CSE

Overview

MAX308CSE from Maxim Integrated is a precision single-ended 1-of-8 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 rail-to-rail signal handling, and targets high-accuracy sample-and-hold and automatic test equipment.

For engineers reviewing the MAX308CSE datasheet, MAX308CSE pinout, MAX308CSE application, or MAX308CSE equivalent, this page delivers verified electrical parameters, validated SO package details, confirmed leakage performance at +85°C, and direct upgrade path information for DG408/DG508A replacements.

Technical Context

The MAX308CSE implements a monolithic CMOS switch architecture with silicon-gate process optimization, delivering sub-10pC charge injection and electrostatic discharge protection >2000V. Its decode logic accepts three address bits (A0–A2) and an active-low enable (EN) to select one of eight bidirectional NOx inputs to the common COM terminal.

It maintains low on-resistance flatness across full analog signal range (±10V typical), supports TTL/CMOS-compatible digital inputs, and exhibits <5nA NO-off leakage at +85°C. Switching is break-before-make, with transition time <250ns and enable turn-on/turn-off times under 600ns at ±15V.

Key Specifications

Pinout & Package

MAX308CSE is supplied in a 16-pin narrow SO (Small Outline) 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 DG408DN, the MAX308CSE delivers tighter on-resistance matching (<5Ω vs. unguaranteed), lower leakage (<5nA vs. 25nA), and built-in ESD protection - making it the preferred choice for high-reliability, precision analog routing where signal integrity and long-term stability are critical.

Availability

MAX308CSE is available at Aetrix Electronics and suitable for automatic test equipment, military radio subsystems, and heads-up display signal routing requiring stable component supply across commercial temperature range (0°C to +70°C).

Supply support for MAX308CSE 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 MAX308CSE belongs to Maxim's precision analog switch/multiplexer product line, engineered for applications demanding low distortion, minimal charge injection, and guaranteed matching - especially in test instrumentation and ruggedized electronics.

FAQ

What is the operating temperature range for the MAX308CSE?

The MAX308CSE is specified for 0°C to +70°C ambient operation. This commercial-grade temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The device uses Maxim's improved 44V silicon-gate process to maintain parameter stability across this range, including leakage and on-resistance specs. For extended temperature versions, consider MAX308ESE (−40°C to +85°C) or MAX308MJE (−55°C to +125°C). The MAX308CSE itself is not rated beyond +70°C.

Is the MAX308CSE pin-compatible with the DG408?

Yes, the MAX308CSE is a direct pin-compatible and functionally equivalent plug-in upgrade for the DG408. Pin assignments, truth table behavior, supply voltage ranges, and logic thresholds match exactly. The MAX308CSE improves upon the DG408 with lower on-resistance (<100Ω vs. 120Ω), tighter matching (<5Ω vs. unspecified), and guaranteed ESD protection >2000V - all while retaining identical SO-16 packaging and footprint. No PCB or schematic changes are needed for replacement.

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

The MAX308CSE supports analog signals from V− to V+ - i.e., rail-to-rail operation. With ±15V dual supplies, the full range is ±15V; with +12V/0V single supply, it is 0V to +12V. The datasheet guarantees on-resistance flatness ≤7Ω specifically over ±10V, and absolute maximum analog voltage is limited to (V− − 2V) to (V+ + 2V) due to internal clamp diodes. Exceeding these clamping limits risks damage unless external protection is added.

Does the MAX308CSE require external pull-up resistors on address or enable pins?

No, the MAX308CSE does not require external pull-up resistors. Its CMOS digital inputs (A0, A1, A2, EN) have high impedance and are fully TTL/CMOS-compatible, accepting logic-high thresholds ≥2.4V and logic-low ≤0.8V. Input current is guaranteed <±1.0µA across temperature, so microcontroller GPIOs or FPGA outputs can drive them directly. Pull-ups are unnecessary unless system-level noise immunity or default-state assurance is required - which is a board-level design choice, not a device requirement.

How does charge injection in the MAX308CSE affect sample-and-hold performance?

Charge injection in the MAX308CSE is guaranteed <10pC, a key spec directly impacting sample-and-hold accuracy. When the switch opens, this injected charge transfers to the hold capacitor (e.g., 10nF), causing a voltage step ΔV = Q/C - here, <1mV. Combined with <5nA NO-off leakage at +85°C, the MAX308CSE enables hold times >100ms with <1LSB error in 12-bit systems. This performance is validated in Figure 5 and Table "Charge Injection" under both dual and single-supply conditions.