Analog Devices Inc./Maxim Integrated MAX333AEAP

Overview

MAX333AEAP from Maxim Integrated is a precision quad SPDT CMOS analog switch operating with bipolar supplies (±4.5V to ±20V) or single-ended +10V to +30V, delivering <35Ω on-resistance, <2Ω channel-to-channel match, and <10pC charge injection. It serves as signal routing element in test equipment front-ends and portable instrument multiplexers where rail-to-rail analog handling and low leakage (<6nA at +85°C) are critical.

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), TTL/CMOS logic compatibility across supply ranges, and ESD robustness (>2000V).

Technical Context

The MAX333AEAP implements four independent SPDT switches using silicon-gate CMOS process, supporting both bipolar and single-supply operation without level-shifting circuitry. Its internal architecture guarantees matched on-resistance between channels and flat R_ON over full analog signal range (V_COM = V₋ to V₊), enabling precision signal routing in multichannel data acquisition systems.

Logic inputs accept TTL/CMOS levels (0.8V–2.4V) independent of supply voltage, while analog terminals tolerate rail-to-rail signals up to ±20V or +30V. Break-before-make switching prevents momentary shorting during state transitions, with t_ON < 175ns and t_OFF < 145ns under ±15V dual-supply conditions.

Key Specifications

Pinout & Package

MAX333AEAP is housed in a 20-pin plastic DIP package rated for -40°C to +85°C operation. Pin layout follows standard dual-in-line configuration with power, ground, logic, and analog terminals arranged for noise-sensitive analog routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TS5A3159DCKR, the MAX333AEAP uniquely combines quad SPDT topology, bipolar/single-supply flexibility, guaranteed channel matching, and industrial temperature range - making it irreplaceable in precision test and avionics signal routing where topology and parametric guarantees are non-negotiable.

Availability

MAX333AEAP is available at Aetrix Electronics and suitable for automated test equipment, portable digital multimeters, avionics heads-up displays, and communications system signal routing requiring stable component supply across extended temperature and voltage ranges.

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, communications, and computing applications.

The MAX333A product line delivers high-fidelity analog switching solutions for test, measurement, and portable instrumentation where signal integrity, channel matching, and rugged operation are essential.

FAQ

What supply configurations does the MAX333AEAP support?

The MAX333AEAP operates with bipolar supplies from ±4.5V to ±20V or single-ended supplies from +10V to +30V. When using single-supply mode, V− must be connected to ground. The device maintains full rail-to-rail analog signal handling (V_COM, V_NO, V_NC = V− to V+) across all supported supply configurations, and logic inputs remain TTL/CMOS compatible regardless of supply voltage. This flexibility allows direct integration into legacy ±15V test gear and modern +24V industrial controllers without level-shifting circuitry.

How does the MAX333AEAP ensure signal accuracy in precision measurement systems?

The MAX333AEAP ensures signal accuracy through three guaranteed specifications: on-resistance matching <2Ω between channels, on-resistance flatness Δ3Ω maximum over the full analog signal range, and charge injection <10pC. These parameters directly reduce gain mismatch, maintain linearity across input voltage swings, and minimize transient glitches in sample-and-hold or ADC input stages. Unlike generic analog switches, these specs are production-tested and guaranteed - critical for ratiometric measurements in multichannel data loggers and calibrated test equipment where channel-to-channel consistency is mandatory.

What is the thermal performance of the MAX333AEAP in extended-temperature applications?

The MAX333AEAP is rated for continuous operation from -40°C to +85°C and features guaranteed electrical performance across this full range. Key parameters like on-resistance (45Ω max at +85°C, single-supply), off-leakage (<6nA at +85°C), and supply current (<0.25mA I+ at +85°C) are specified over temperature. Its plastic DIP package provides adequate thermal dissipation for typical analog switch power levels (3.75mW), and derating curves in the datasheet confirm stable operation without thermal runaway in enclosed industrial enclosures or avionics bays.

Can the MAX333AEAP replace DG211/DG212 or DG403 devices in existing designs?

Yes, the MAX333AEAP is explicitly positioned as an upgraded replacement for a DG211/DG212 pair or two DG403s. It offers superior performance: lower on-resistance (<35Ω vs. ~60Ω), tighter channel matching (<2Ω vs. unspecified), guaranteed break-before-make (10ns), and enhanced ESD protection (>2000V vs. ~200V). Pin compatibility is maintained in the 20-pin DIP package (MAX333AEAP ↔ DG212/DG403 footprint), allowing drop-in replacement in most layouts - though designers should verify that V− grounding and logic-level thresholds align with existing control logic.

What layout considerations are critical for minimizing noise in MAX333AEAP applications?

Critical layout practices for the MAX333AEAP include: separating analog and digital ground planes with single-point connection near V−/GND pins; routing COM/NO/NC traces away from IN and supply lines; using short, direct paths for V+ and V− with local 0.1µF ceramic decoupling capacitors; and leaving pin 15 (N.C.) unconnected and unstubbed. Because the device handles rail-to-rail signals up to ±20V, guard rings around high-impedance analog nodes and isolation of sensitive COM traces from noisy digital returns significantly reduce crosstalk - especially important in high-resolution DMMs and ATE systems where 16-bit accuracy is required.