Analog Devices Inc./Maxim Integrated MAX4051CPE

Overview

MAX4051CPE from Maxim Integrated is an 8-channel CMOS analog multiplexer with rail-to-rail signal handling, ±2.7V to ±8V dual-supply or +2.7V to +16V single-supply operation, 100Ω typical on-resistance at ±5V, 0.1nA max off-leakage at +25°C (A-suffix), and TTL/CMOS logic compatibility - used in battery-powered data-acquisition systems for sensor channel selection.

For engineers reviewing the MAX4051CPE datasheet, MAX4051CPE pinout, MAX4051CPE application, or MAX4051CPE equivalent, key selection criteria include guaranteed on-resistance match (6Ω), low charge injection (2pC), high off-isolation (<–90dB), and compatibility with legacy 74HC4051 layouts in mixed-signal test equipment.

Technical Context

The MAX4051CPE implements a single 8:1 analog multiplexer using transmission-gate CMOS architecture with independent digital address decoding (ADDA, ADDB, ADDC) and global inhibit (INH). Its internal logic-level translators isolate digital control signals from analog supply rails (V+, V−), enabling robust operation across wide voltage ranges without level-shifting circuitry.

All NOx and COM pins are bidirectional and electrically interchangeable; switching is break-before-make with 30ns typical delay. On-resistance flatness is specified at 10Ω over ±3V analog range, and leakage performance is fully characterized for the C-grade (0°C to +70°C) temperature range per A-suffix specifications.

Key Specifications

Pinout & Package

MAX4051CPE is supplied in a 16-pin plastic DIP package (0.300" width), RoHS-compliant, with through-hole mounting and industry-standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4051N and ADG1408BRUZ, the MAX4051CPE uniquely balances pin compatibility, dual-supply flexibility, and guaranteed low-leakage performance - making it optimal for retrofitting legacy 74HC4051 designs requiring improved precision or extended voltage range.

Availability

MAX4051CPE is available at Aetrix Electronics and suitable for battery-operated equipment, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply across industrial temperature variations and long production lifecycles.

Supply support for MAX4051CPE 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 demanding industrial, medical, and communications applications.

The MAX4051/A series was developed specifically for low-voltage, low-leakage analog multiplexing in portable and high-fidelity signal-path applications - emphasizing rail-to-rail operation, tight RON matching, and robust ESD protection.

FAQ

What is the maximum analog signal range supported by the MAX4051CPE?

The MAX4051CPE supports rail-to-rail analog signals from V− to V+. With ±5V supplies, this means –5V to +5V; with a +5V single supply (V− = GND), the range is 0V to +5V. The device maintains specified on-resistance and leakage performance across this full range, enabling direct interfacing with op-amps, sensors, and DACs without external level-shifting circuitry. Always observe absolute maximum ratings: analog signals must stay within (V− – 2V) to (V+ + 2V).

Does the MAX4051CPE require external pull-up or pull-down resistors on its address pins?

No, the MAX4051CPE does not require external pull-up or pull-down resistors on ADDA, ADDB, or ADDC pins. Its digital inputs have guaranteed TTL/CMOS-compatible thresholds (0.8V low, 2.4V high at +5V supply) and low input current (±1µA max), allowing direct connection to microcontroller GPIOs. However, if floating states must be avoided during power-up or reset, a weak pull-down (e.g., 100kΩ to GND) on INH is recommended to ensure all switches remain off until firmware initializes.

Can the MAX4051CPE operate reliably from a +3.3V single supply?

Yes, the MAX4051CPE operates reliably from a +3.3V single supply (V+ = +3.3V, V− = GND). At this voltage, typical on-resistance increases to ~250Ω (vs. 100Ω at ±5V), and switching times lengthen (tON ≈ 180ns), but all electrical specifications - including leakage, isolation, and logic thresholds - remain valid across the full 0°C to +70°C temperature range. This makes it suitable for modern low-voltage embedded systems where power efficiency and compatibility with 3.3V logic are critical.

How does the MAX4051CPE handle power-supply sequencing, and what happens if V− is powered before V+?

The MAX4051CPE requires proper power-supply sequencing: V+ should be applied first, then V−, followed by digital inputs and analog signals. If V− is powered before V+, internal ESD diodes may forward-bias, causing excessive current flow and potential damage. To prevent this in systems with uncontrolled sequencing, external blocking diodes (e.g., 1N4148) can be placed in series with V+ and V− pins - reducing the effective analog range by ~0.7V but preserving device integrity. The MAX4051CPE itself contains no internal sequencing protection.

Is the MAX4051CPE pinout compatible with the MAX4051ACPE variant?

Yes, the MAX4051CPE and MAX4051ACPE share identical pinout, package (16-pin plastic DIP), and functional behavior. The "A" suffix denotes enhanced characterization for on-resistance match (6Ω vs. 12Ω), on-resistance flatness (10Ω vs. 18Ω), and leakage (0.1nA vs. 1nA at +25°C), but both variants use the same pin assignments, truth table, and timing specifications. This allows drop-in substitution where tighter parametric guarantees are required - provided the application's temperature range (0°C to +70°C) aligns with the C-grade rating of both parts.