Analog Devices Inc./Maxim Integrated MAX333AEAP+

Overview

MAX333AEAP+ from Maxim Integrated is a precision quad SPDT CMOS analog switch operating on bipolar supplies (±4.5V to ±20V) or single-ended supplies (+10V to +30V), featuring <35Ω on-resistance, <2Ω channel-to-channel matching, <10pC charge injection, 175ns turn-on time, and rail-to-rail analog signal handling. It serves in high-accuracy signal routing for portable test equipment and communications interfaces.

For engineers reviewing the MAX333AEAP+ datasheet, MAX333AEAP+ pinout, MAX333AEAP+ application, or MAX333AEAP+ equivalent, key selection criteria include guaranteed on-resistance flatness (∆3Ω max), break-before-make timing (10ns typical), ESD tolerance (>2000V), and dual-supply flexibility-critical for low-distortion multiplexing in battery-powered instrumentation.

Technical Context

The MAX333AEAP+ integrates four independent SPDT switches using Maxim's silicon-gate CMOS process, enabling simultaneous control of analog signals across full supply rails without damage. Its logic inputs are TTL/CMOS-compatible (0.8V–2.4V thresholds) regardless of supply voltage, and it guarantees matched on-resistance (<2Ω) and flatness (∆3Ω max) only under bipolar operation.

Dynamic performance includes 145ns turn-off and 175ns turn-on times at ±15V, with break-before-make isolation of 10ns typical. Off-isolation exceeds 72dB and crosstalk remains below 78dB at 1MHz, supporting high-fidelity signal switching in sensitive measurement paths.

Key Specifications

Pinout & Package

MAX333AEAP+ is housed in a 20-pin plastic DIP package rated for −40°C to +85°C operation. Pin layout supports compact through-hole mounting with standard 0.3-inch row spacing and 0.1-inch pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX333ACPP and ADG408BRZ, the MAX333AEAP+ uniquely combines quad SPDT topology, −40°C to +85°C operation, <2Ω RON matching, and <10pC charge injection-making it optimal for portable, high-accuracy analog routing where thermal stability and signal fidelity are critical.

Availability

MAX333AEAP+ is available at Aetrix Electronics and suitable for test equipment, communications systems, heads-up displays, and portable instruments requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX333AEAP+ 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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX333A product line delivers high-performance analog switching solutions optimized for low-distortion, low-leakage, and rail-to-rail signal routing in portable and mission-critical instrumentation.

FAQ

What is the maximum analog signal voltage range supported by the MAX333AEAP+?

The MAX333AEAP+ supports rail-to-rail analog signals from V− to V+, meaning it handles input/output voltages spanning the full supply range-up to ±20V in bipolar mode or +30V in single-supply mode. This eliminates need for external level shifters in mixed-voltage systems and ensures full dynamic range preservation in precision measurement paths. The MAX333AEAP+ maintains this capability across its full −40°C to +85°C operating temperature range.

Does the MAX333AEAP+ require external pull-up or pull-down resistors on its logic inputs?

No, the MAX333AEAP+ logic inputs are TTL- and CMOS-compatible with guaranteed thresholds of 0.8V (VIL) and 2.4V (VIH), and they draw less than 1µA input current. This allows direct interfacing with microcontroller GPIOs, FPGA outputs, or logic gates without external biasing. The MAX333AEAP+ maintains valid logic recognition across its entire supply range, including at ±4.5V and +10V minimum operating points.

Can the MAX333AEAP+ operate from an unbalanced supply such as +24V and −5V?

Yes, the MAX333AEAP+ supports unbalanced supplies-for example, +24V on V+ and −5V on V−-as long as the absolute difference (V+ − V−) does not exceed 44V and each supply stays within its absolute maximum rating (V+ ≤ +30V, V− ≥ −30V). In such configurations, the analog signal range remains rail-to-rail (−5V to +24V), and all electrical specifications-including on-resistance and leakage-are maintained. The MAX333AEAP+ datasheet explicitly confirms this capability.

What is the guaranteed on-resistance flatness specification for the MAX333AEAP+?

The MAX333AEAP+ guarantees on-resistance flatness of ∆3Ω maximum over the full analog signal range (VCOM from V− to V+)-but only under bipolar supply conditions (e.g., ±15V). This flatness ensures minimal THD and gain variation as the signal swings across the rails, critical for audio, video, and precision measurement applications. The MAX333AEAP+ achieves this via matched transistor geometry and improved silicon-gate processing, as confirmed in the device's Electrical Characteristics table.

Is the MAX333AEAP+ pin-compatible with legacy DG211/DG212 analog switches?

Yes, the MAX333AEAP+ is a direct pin- and function-compatible upgrade for a pair of DG211/DG212 devices or two DG403s, offering identical 20-pin DIP footprint and logic-level compatibility. It improves upon those predecessors with lower on-resistance (<35Ω vs. ~60Ω), tighter RON matching (<2Ω vs. unspecified), reduced charge injection (<10pC vs. ~25pC), and higher ESD tolerance (>2000V vs. ~200V). The MAX333AEAP+ requires no PCB changes for drop-in replacement in existing DG211-based designs.