Analog Devices Inc./Maxim Integrated MAX338EEE+T

Overview

MAX338EEE+T from Maxim Integrated is an 8-channel single-ended CMOS analog multiplexer designed to route one of eight bidirectional analog inputs to a common COM terminal under 3-bit binary address control. It features ≤400Ω on-resistance, <20pA NO-off leakage at +25°C, and 1.5pC typical charge injection-enabling precision signal routing in data-acquisition systems operating across ±4.5V to ±20V dual supplies or +4.5V to +30V single supply.

For engineers reviewing the MAX338EEE+T datasheet, MAX338EEE+T pinout, MAX338EEE+T application, or MAX338EEE+T equivalent, key selection criteria include guaranteed low leakage over -40°C to +85°C, rail-to-rail analog signal handling up to ±15V, TTL/CMOS-compatible enable and address inputs, and ESD protection >2000V per Method 3015.7.

Technical Context

The MAX338EEE+T implements a monolithic silicon-gate CMOS switch matrix with integrated decode logic, supporting both multiplexing and demultiplexing modes. Its architecture guarantees break-before-make switching (10–140ns), transition time <500ns, and on-resistance matching ≤10Ω between channels at +25°C.

All digital inputs-including EN, A0, A1, and A2-are TTL/CMOS-logic compatible across the full -40°C to +85°C temperature range and ±4.5V to ±18V supply range. The device operates with rail-to-rail analog signals referenced to V+ and V-, enabling direct interfacing with ±15V op-amps and ADCs without level-shifting.

Key Specifications

Pinout & Package

MAX338EEE+T is housed in a 16-pin QSOP package (E16+5 outline) with lead(Pb)-free/RoHS-compliant finish and -40°C to +85°C operating temperature range.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX328EEE+, the MAX338EEE+T trades higher on-resistance tolerance for superior speed and broader supply flexibility; versus DG508AEY+, it delivers verified ESD robustness and guaranteed low-leakage performance across the full industrial temperature range-making it the preferred choice for new designs requiring reliability and precision.

Availability

MAX338EEE+T is available at Aetrix Electronics and suitable for data-acquisition systems, test equipment, and guidance and control systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX338EEE+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 is a semiconductor company specializing in analog and mixed-signal ICs for industrial, communications, computing, and consumer applications.

The MAX338EEE+T belongs to Maxim's precision analog multiplexer product line, engineered for low-leakage, low-charge-injection signal routing in high-accuracy measurement and control systems.

FAQ

What is the maximum allowable supply voltage difference between V+ and V- for MAX338EEE+T?

The MAX338EEE+T specifies a maximum differential voltage of 44V between V+ and V-. This limit applies regardless of individual rail values-for example, V+ = +24V and V- = -20V is acceptable (44V total), but V+ = +30V and V- = -15V (45V) exceeds absolute maximum ratings and may cause permanent damage. Always observe this constraint during power-up sequencing and fault conditions.

Does MAX338EEE+T support single-supply operation, and how is it configured?

Yes, MAX338EEE+T supports single-supply operation from +4.5V to +30V. To configure it, connect V- to GND, apply the positive supply to V+, and ensure analog input signals remain within 0V to V+ (e.g., 0V to +12V). Digital inputs (EN, A0–A2) retain TTL/CMOS compatibility. Note that on-resistance increases slightly compared to dual-supply mode, and analog signal range becomes unipolar.

What is the function of the EN pin on MAX338EEE+T, and what logic levels activate it?

The EN (Enable) pin on MAX338EEE+T is an active-high control that globally enables or disables all eight analog switches. When EN is high (≥+2.4V), the selected channel connects NOx to COM; when EN is low (≤+0.8V), all switches open regardless of address inputs. EN is TTL/CMOS-compatible across the full -40°C to +85°C range and ±4.5V to ±18V supply window, allowing direct drive from standard microcontrollers.

How does MAX338EEE+T handle overvoltage conditions on NO or COM pins?

MAX338EEE+T includes internal clamping diodes on NO and COM pins that conduct when voltages exceed V+ or fall below V- by more than ~0.7V. To prevent damage, forward current must be limited to ≤30mA continuous or ≤100mA peak (1ms, 10% duty cycle). For robust overvoltage protection beyond ±2V, external series resistors or discrete diodes (as shown in Maxim's Figure 1) are recommended-though this reduces usable analog range by ~1V per rail.

Is MAX338EEE+T pin-compatible with the DG508A, and what improvements does it offer?

Yes, MAX338EEE+T is a pin-compatible upgrade for the industry-standard DG508A. It improves upon DG508A with guaranteed ≤20pA NO-off leakage (vs. 100pA typical), 1.5pC typical charge injection (vs. unspecified), >2000V ESD protection (vs. none specified), and operation across -40°C to +85°C (vs. 0°C to +70°C). No PCB or schematic changes are required for drop-in replacement.