Analog Devices Inc./Maxim Integrated MAX337EAI+T

Overview

MAX337EAI+T from Maxim Integrated is a dual 8-channel CMOS analog multiplexer designed to route one of eight differential inputs (A or B side) to its respective common output (COMA or COMB) under 3-bit binary address control. It features ≤400Ω on-resistance, <20pA NO-off leakage at +25°C, 3.5pC typical charge injection, ±4.5V to ±20V dual-supply operation, and rail-to-rail bidirectional signal handling - enabling precision signal routing in automated test equipment and data acquisition systems.

For engineers reviewing the MAX337EAI+T datasheet, MAX337EAI+T pinout, MAX337EAI+T application, or MAX337EAI+T equivalent, key selection criteria include guaranteed low leakage across -40°C to +85°C, TTL/CMOS-compatible enable and address inputs, ESD protection >2000V (Method 3015.7), and pin compatibility with industry-standard DG507 for drop-in upgrades in legacy designs.

Technical Context

The MAX337EAI+T implements a dual independent 8:1 analog mux architecture with separate A- and B-side channels, each controlled by shared A0–A2 address lines and individual EN enables. Its BiCMOS process ensures matched on-resistance (<10Ω channel-to-channel), low charge injection (3.5pC typ), and sub-500ns transition time under ±15V supplies.

All digital inputs (A0–A2, EN) are TTL/CMOS-compatible (0.8V to 2.4V thresholds) across full temperature range and supply voltages (±4.5V to ±18V). Analog signal range extends rail-to-rail (V− to V+), supporting bidirectional current flow and unbalanced supplies like +24V/−5V - with absolute max V+–V− ≤ 44V.

Key Specifications

Pinout & Package

MAX337EAI+T is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, RoHS-compliant lead-free finish (+T suffix), and moisture sensitivity level (MSL) 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX337CWI+, the MAX337EAI+T adds extended temperature qualification and identical performance; versus ADG507AKRZ, it delivers superior leakage, charge injection, and ESD robustness - making MAX337EAI+T the preferred choice for high-precision, harsh-environment analog routing.

Availability

MAX337EAI+T is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, industrial sensor interfaces, and calibration systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX337EAI+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX336/MAX337 product line was engineered specifically for low-leakage, rail-to-rail analog signal routing in precision instrumentation - emphasizing parametric guarantees (leakage, R_ON, charge injection) over broad feature sets.

FAQ

What is the maximum allowable voltage difference between V+ and V− for MAX337EAI+T?

The absolute maximum voltage difference between V+ and V− for MAX337EAI+T is 44V. This limit applies regardless of individual rail values - for example, +24V and −20V is acceptable (44V total), but +30V and −20V exceeds the rating. Exceeding this stress condition may cause permanent damage, as specified in the Absolute Maximum Ratings table of the datasheet. Always verify V+–V− ≤ 44V in both steady-state and transient conditions when designing with MAX337EAI+T.

Can MAX337EAI+T operate with unbalanced supplies such as +24V and −5V?

Yes, MAX337EAI+T supports unbalanced supplies including +24V and −5V, provided the total V+–V− difference does not exceed 44V and each rail stays within its absolute maximum ratings (V+ ≤ 44V above V−, GND ≤ 25V above V−). The device maintains full rail-to-rail analog signal range (−5V to +24V) and retains all specified leakage, on-resistance, and switching performance. This flexibility makes MAX337EAI+T suitable for legacy industrial systems with asymmetric supply architectures.

Is MAX337EAI+T pin-compatible with DG507 in the same SSOP package?

Yes, MAX337EAI+T is pin-compatible with DG507 in the 28-pin SSOP package. Pin functions, numbering, and physical layout match exactly - enabling direct replacement without PCB modification. This plug-in upgrade delivers improved specifications: lower on-resistance (400Ω vs. 450Ω), reduced charge injection (3.5pC vs. 5pC), and enhanced ESD protection (>2000V vs. 1000V). System validation should confirm timing and leakage behavior meets updated requirements, but layout reuse is fully supported for MAX337EAI+T.

What is the guaranteed NO-off leakage current for MAX337EAI+T over its full operating temperature range?

For MAX337EAI+T, the guaranteed NO-off leakage current over its full −40°C to +85°C operating range is ±3.25nA (±3250pA), as specified in the Electrical Characteristics table under "NO-Off Leakage Current" for the E-grade (E suffix). This is measured at VCOM = ±10V and VNO = ±10V with EN = 0V. At +25°C, the limit is tighter: ±0.05nA (±50pA). These values are 100% tested at maximum rated hot temperature and correlated at room temperature - critical for high-impedance sensor multiplexing where leakage directly impacts accuracy.

Does MAX337EAI+T require external blocking diodes for overvoltage protection?

No, MAX337EAI+T does not require external blocking diodes for overvoltage protection under normal operation. Internal ESD diodes clamp signals exceeding V+ or V−, but forward current must be limited to 30mA continuous or 100mA peak (1ms, 10% duty cycle) to avoid damage. External diodes are only recommended if power-supply sequencing cannot be controlled (e.g., V− applied before V+), as they reduce analog range by ~1V but preserve low-leakage performance. For most well-designed systems with proper sequencing, MAX337EAI+T operates safely without added components.