Analog Devices Inc./Maxim Integrated MAX4605ESE

Overview

MAX4605ESE from Maxim Integrated is a quad, single-pole single-throw (SPST), normally open (NO) CMOS analog switch with 5Ω maximum on-resistance, ±4.5V to ±20V dual-supply or +4.5V to +36V single-supply operation, and rail-to-rail analog signal handling up to ±10V. It delivers 0.5Ω max R_ON matching and flatness, 2.5nA max off-leakage at +85°C, and is used in precision audio routing and automated test equipment where low distortion and mechanical relay replacement are critical.

For engineers reviewing the MAX4605ESE datasheet, MAX4605ESE pinout, MAX4605ESE application, or MAX4605ESE equivalent, key selection criteria include guaranteed R_ON match across channels, TTL/CMOS-compatible logic thresholds at ±15V or +12V supplies, dual- or single-supply flexibility, and SO-16 package compatibility with industrial temperature range (-40°C to +85°C).

Technical Context

The MAX4605ESE implements four independent SPST NO switches using high-voltage CMOS process technology, enabling true rail-to-rail analog conduction without signal clipping. Its control architecture uses buffered digital inputs with fixed 0.8V/2.4V logic thresholds-ensuring reliable switching under both ±15V dual-supply and +12V single-supply conditions.

Each channel features matched on-resistance (ΔR_ON ≤ 0.5Ω) and flat R_ON (≤ 0.5Ω variation over full signal range), minimizing harmonic distortion in AC-coupled paths. Off-isolation exceeds -62dB at DC–1MHz, while crosstalk remains below -60dB between any two switches-critical for multi-channel signal integrity in PBX and avionics systems.

Key Specifications

Pinout & Package

MAX4605ESE is housed in a 16-pin narrow SOIC (SO/DIP) package with exposed pad not present; footprint matches industry-standard 16-SOIC-N (0.150" width), suitable for reflow soldering and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1404BRUZ and TS5A3154DCUR, the MAX4605ESE uniquely supports independent logic/analog supply domains, dual- or single-supply operation across ±20V/+36V ranges, and guaranteed R_ON matching over full industrial temperature range-making it the only option for high-reliability, multi-rail signal routing where channel consistency and supply flexibility are non-negotiable.

Availability

MAX4605ESE is available at Aetrix Electronics and suitable for reed relay replacement, PBX/PABX systems, and test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX4605ESE 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, mixed-signal, and power management ICs for industrial, communications, and automotive markets.

The MAX4604/MAX4605/MAX4606 family was engineered specifically for high-fidelity analog signal routing in environments demanding low distortion, mechanical relay elimination, and wide supply voltage tolerance-targeting automatic test equipment, telecom infrastructure, and ruggedized avionics.

FAQ

What is the operating temperature range for the MAX4605ESE?

The MAX4605ESE is specified for operation from −40°C to +85°C, making it suitable for industrial and extended-temperature applications. This grade is confirmed in the Ordering Information table, where "E" suffix denotes the −40°C to +85°C range, distinct from the "C" grade (0°C to +70°C). All electrical characteristics-including R_ON, leakage, and timing-are guaranteed across this full range.

Can the MAX4605ESE operate from a single +5V supply?

No, the MAX4605ESE cannot operate reliably from a single +5V supply. Its absolute minimum single-supply voltage is +4.5V, but the recommended minimum for guaranteed performance-including full rail-to-rail signal swing and logic compatibility-is +12V. At +5V, R_ON increases significantly (>10Ω), off-leakage rises, and logic thresholds may not be met, risking undefined switching behavior.

Does the MAX4605ESE require external protection diodes for overvoltage?

External protection diodes are not required for normal operation within Absolute Maximum Ratings, but are recommended if power-supply sequencing cannot be controlled. The MAX4605ESE includes internal clamp diodes, but exceeding V+ or V− by more than 0.3V risks damage. Figure 1 in the datasheet shows optional external diodes for cases where V+ and V− may be applied out-of-sequence.

How does the VL pin function in the MAX4605ESE?

The VL pin powers the logic interface independently of V+ and V−, accepting 2.7V to 5.5V. This allows clean separation between digital control signals and noisy analog supplies-reducing ground bounce and supply coupling into analog paths. When VL = 3.3V, the device accepts 3.3V logic inputs directly; when VL = 5V, it supports 5V TTL/CMOS levels without level shifters.

Is the MAX4605ESE pin-compatible with other parts in the MAX4604/MAX4605/MAX4606 family?

Yes, the MAX4605ESE shares identical pinout and package (16-pin narrow SOIC) with MAX4604ESE and MAX4606ESE. However, internal switch configuration differs: MAX4605ESE has four NO switches, MAX4604ESE has four NC switches, and MAX4606ESE has two NO + two NC. Swapping requires logic inversion or redesign of control firmware to maintain functional equivalence.