Analog Devices Inc./Maxim Integrated MAX303EPE+

Overview

The MAX303EPE+ from Maxim Integrated is a precision dual SPDT analog switch with two normally open (NO) and two normally closed (NC) poles, designed for high-accuracy signal routing in bipolar or single-supply systems. It delivers <35Ω max on-resistance, <2Ω channel-to-channel match, <15pC charge injection, <6nA off-leakage at +85°C, and sub-150ns switching speed - enabling use in sample-and-hold circuits and military-grade test equipment.

For engineers reviewing the MAX303EPE+ datasheet, MAX303EPE+ pinout, MAX303EPE+ application, or MAX303EPE+ equivalent, key selection criteria include guaranteed on-resistance flatness (Δ3Ω max), rail-to-rail analog signal handling (V− to V+), CMOS/TTL logic compatibility, and −40°C to +85°C industrial temperature operation.

Technical Context

The MAX303EPE+ implements a monolithic silicon-gate CMOS architecture optimized for low distortion and minimal signal path degradation. Its dual SPDT topology supports independent control of two analog paths with break-before-make timing (10–20ns), while internal substrate biasing via V+ ensures stable performance across ±4.5V to ±20V supply ranges.

Charge injection is actively minimized through matched transistor geometry and layout symmetry, yielding ≤15pC typical - critical for precision sampling. Off-isolation exceeds 72dB at 1MHz, and crosstalk remains below −90dB, confirming suitability for high-density multiplexed signal chains where channel integrity is essential.

Key Specifications

Pinout & Package

MAX303EPE+ uses a 16-pin plastic DIP (P16-1) package with 0.3-inch width and through-hole mounting. Pin functions are electrically validated per Maxim's official pin description table and schematic symbol.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TS5A3157DCKR, the MAX303EPE+ uniquely provides factory-guaranteed dual SPDT topology with NC/NO complementarity, ≤2Ω channel matching, and −40°C to +85°C operation - making it irreplaceable for precision sample-and-hold and ruggedized RF signal routing where topology and parametric guarantees are mandatory.

Availability

MAX303EPE+ is available at Aetrix Electronics and suitable for sample-and-hold circuits, military radios, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX303EPE+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX303EPE+ belongs to Maxim's precision analog switch family, engineered specifically for high-accuracy signal routing in systems requiring guaranteed matching, low charge injection, and rail-to-rail operation under wide supply and temperature conditions.

FAQ

What is the maximum allowable supply voltage for MAX303EPE+?

The MAX303EPE+ supports bipolar supplies from ±4.5V to ±20V and single positive supplies from +10V to +30V. Its absolute maximum rating is 44V between V+ and V−, meaning the total differential supply must not exceed this limit - e.g., +22V/−22V is acceptable, but +25V/−25V violates the rating. Operation beyond these limits risks permanent damage.

Does MAX303EPE+ require a separate logic supply (VL), and what happens if VL is unconnected?

Yes, MAX303EPE+ requires VL to be connected - typically to +5V for TTL compatibility or to V+ for CMOS-level operation. If VL is left floating, input thresholds become undefined and logic control may fail unpredictably. The device will not function reliably without a valid VL reference, as confirmed in the Applications Information section of the datasheet.

Can MAX303EPE+ operate with V− = 0V (single-supply mode), and how does that affect analog signal range?

Yes, MAX303EPE+ supports single-supply operation with V− = 0V and V+ = +10V to +30V. In this configuration, the analog signal range becomes 0V to V+, preserving rail-to-rail capability. However, on-resistance increases slightly versus bipolar operation - e.g., ~45Ω max at V+ = +15V, V− = 0V - as shown in Figure MAX301-4 of the datasheet.

Is MAX303EPE+ pin-compatible with MAX303CPE or MAX303ESE?

MAX303EPE+ shares identical pinout and footprint with MAX303CPE (commercial temp) and MAX303ESE (SO-16), as all use the same P16-1 DIP package or S16-2 SO package per Ordering Information. However, MAX303EPE+ is not pin-compatible with LCC-packaged variants (e.g., MAX303MLP) due to different pin count and layout.

What is the guaranteed break-before-make time for MAX303EPE+, and why does it matter?

The MAX303EPE+ guarantees 10ns to 20ns break-before-make delay between NC and NO paths during logic transitions. This prevents momentary short-circuits when switching complementary analog paths - essential in applications like relay replacement or signal source redundancy, where even nanosecond overlap could cause transient loading or signal corruption.