Analog Devices Inc./Maxim Integrated MAX4621CPE

Overview

The MAX4621CPE from Maxim Integrated is a precision dual SPST analog switch with 5Ω max on-resistance, 0.5Ω max R_ON match between channels, and rail-to-rail analog signal handling (±18V bipolar or +36V single supply). It operates over 0°C to +70°C and is used in test equipment signal routing where low distortion and fast switching (<250ns t_ON) are critical.

For engineers reviewing the MAX4621CPE datasheet, MAX4621CPE pinout, MAX4621CPE application, or MAX4621CPE equivalent, key selection criteria include guaranteed break-before-make timing (not applicable), channel matching tolerance, leakage performance at +85°C, and compatibility with TTL/CMOS logic levels across wide supply ranges.

Technical Context

The MAX4621CPE implements two independent normally-open (NO) analog switches in a monolithic CMOS process. Each switch features matched on-resistance (ΔR_ON ≤ 0.5Ω) and flat R_ON profile (≤0.5Ω variation) over full signal range (V_- to V₊). It supports both single-supply (+4.5V to +36V) and bipolar-supply (±4.5V to ±18V) operation while maintaining TTL/CMOS input compatibility via dedicated VL pin.

Its internal protection diodes clamp analog inputs exceeding V₊ or V_-, and it guarantees <5nA off-leakage at +85°C. Switching is controlled by non-inverting logic inputs (IN1/IN2), with no internal inter-channel timing coordination-each switch operates independently.

Key Specifications

Pinout & Package

MAX4621CPE is housed in a 16-pin plastic DIP package (0.3-inch width), with through-hole mounting and standard JEDEC MO-001AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4621CPE, MAX4621CSE offers identical performance in a smaller SOIC package ideal for volume production, while ADG401BNZ trades bipolar flexibility for slightly lower cost and simpler supply architecture in single-rail systems.

Availability

MAX4621CPE is available at Aetrix Electronics and suitable for test equipment, military radio upgrades, and avionics signal conditioning requiring stable component supply across industrial temperature grades and long-lifecycle programs.

Supply support for MAX4621CPE 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 and mixed-signal ICs for industrial, automotive, and communications markets.

The MAX4621CPE belongs to Maxim's high-performance analog switch family, engineered for low-distortion signal routing in automatic test equipment and mission-critical systems demanding guaranteed matching and wide supply flexibility.

FAQ

What is the maximum allowable voltage difference between V+ and V- for the MAX4621CPE?

The MAX4621CPE absolute maximum rating specifies that the voltage difference between V+ and V− must not exceed +44V. This limit applies regardless of individual rail voltages, and exceeding it risks permanent device damage. For reliable operation, maintain V+ − V− ≤ 44V while staying within the recommended supply ranges: ±4.5V to ±18V bipolar or +4.5V to +36V single supply. The MAX4621CPE datasheet confirms this in the Absolute Maximum Ratings table.

Does the MAX4621CPE support break-before-make switching?

No, the MAX4621CPE does not guarantee break-before-make operation because it contains two independent SPST switches with no internal timing coordination. Unlike the MAX4622 (SPDT), the MAX4621CPE lacks integrated BBM logic. If overlap-free switching is required, external control sequencing must be implemented in the system firmware or logic. This behavior is explicitly documented in the MAX4621CPE functional description and truth table.

Can the MAX4621CPE operate with V+ = +12V and V- = GND (single supply)?

Yes, the MAX4621CPE fully supports single-supply operation with V+ = +12V and V− = GND (0V), as confirmed in the "ELECTRICAL CHARACTERISTICS-Single Supply" section of its datasheet. In this configuration, analog signals can swing from 0V to +12V, and the device maintains 5Ω max on-resistance, <1nA off-leakage at +25°C, and TTL/CMOS logic compatibility via the VL pin. The MAX4621CPE is rated for +4.5V to +36V single-supply use.

What is the purpose of the VL pin on the MAX4621CPE?

The VL pin on the MAX4621CPE provides a dedicated logic supply reference, decoupling TTL/CMOS input thresholds from the analog supply rails (V+ and V−). This allows the device to accept standard 0V/5V logic signals even when operating from ±15V analog supplies. Connecting VL to +5V ensures correct interpretation of VINH ≥ 2.4V and VINL ≤ 0.8V, as specified in the MAX4621CPE electrical characteristics tables. Leaving VL unconnected will cause logic interface failure.

Is the MAX4621CPE pin-compatible with the DG401?

Yes, the MAX4621CPE is explicitly documented as a pin-compatible replacement for the DG401, offering improved on-resistance (5Ω max vs. DG401's 35Ω), tighter R_ON matching (0.5Ω vs. unspecified), and broader supply range (±18V vs. ±15V). This compatibility is stated in the MAX4621CPE general description and confirmed in the Pin Configurations diagram. No PCB layout changes are needed when upgrading from DG401 to MAX4621CPE in existing DIP-16 footprints.