Analog Devices Inc./Maxim Integrated MAX4669CSE

Overview

MAX4669CSE from Maxim Integrated is a dual SPST CMOS analog switch with one normally closed (NC) and one normally open (NO) channel, guaranteeing break-before-make operation. It features 2.5Ω max 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 ±20V. It is used in reed relay replacement, test equipment, and audio-signal routing where low distortion and guaranteed switching sequence are critical.

For engineers reviewing the MAX4669CSE datasheet, MAX4669CSE pinout, MAX4669CSE application, or MAX4669CSE equivalent, key selection criteria include verified break-before-make timing (5–30 ns), matched on-resistance (≤0.4Ω between channels), off-isolation (−60 dB), crosstalk (−66 dB), and TTL/CMOS-compatible logic thresholds at ±15V or +12V supplies.

Technical Context

The MAX4669CSE implements two independent SPST switches in a single monolithic CMOS process: Switch 1 is NC, Switch 2 is NO, with internal logic ensuring break-before-make transition to prevent momentary shorting. Its charge injection is specified at 50 pC (typ) under single-supply conditions, enabling precision sampling in data acquisition systems.

It supports dual-supply operation with V+ and V− pins referenced independently, while VL provides a dedicated logic supply (typically +5V) decoupled from analog rails - enabling clean digital control even with high-voltage analog signals. Input logic thresholds (VIN_H = 2.4V, VIN_L = 0.8V) are fixed and fully compatible with TTL/CMOS levels across its full supply range.

Key Specifications

Pinout & Package

MAX4669CSE is housed in a 16-pin narrow SOIC (SO/DIP) package, 3.9mm width, with standard JEDEC MS-012AC footprint and gull-wing leads. Pin 1 is marked by a beveled corner or dot; device operates with exposed pad unconnected (no thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRUZ and TS5A3159DCKR, the MAX4669CSE uniquely supports guaranteed break-before-make, ±20V dual supplies, and −40°C to +85°C extended temperature variants - making it the only option qualified for reed-relay replacement in ATE and avionics signal routing where supply flexibility and switching safety are non-negotiable.

Availability

MAX4669CSE is available at Aetrix Electronics and suitable for reed relay replacement, test equipment signal routing, and avionics signal conditioning requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MAX4669CSE 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX4667/MAX4668/MAX4669 family was designed specifically for high-reliability analog signal routing in automatic test equipment and mission-critical systems where mechanical relay limitations-speed, lifetime, and size-must be overcome without sacrificing signal integrity.

FAQ

What is the guaranteed break-before-make time specification for MAX4669CSE?

The MAX4669CSE guarantees a break-before-make time delay of 5 ns minimum to 30 ns maximum under dual-supply conditions (V+ = +15V, V− = −15V). This parameter is tested and specified in the Electrical Characteristics table and ensures no overlap between NC and NO channel conduction during switching transitions - a critical requirement for protecting downstream circuitry in multiplexer and power-path applications. The MAX4669CSE achieves this via internal logic timing control, distinct from the MAX4667 and MAX4668 variants.

Can MAX4669CSE operate from a single +12V supply, and what are the resulting on-resistance and leakage values?

Yes, MAX4669CSE operates from a single +12V supply (V+ = +12V, V− = GND). Under these conditions, the typical on-resistance is 3.5Ω (max 4Ω), and off-leakage current remains ≤0.5nA at +85°C. The device maintains rail-to-rail signal handling from 0V to +12V, and logic inputs retain TTL/CMOS compatibility with VIN_H = 2.4V and VIN_L = 0.8V. All dynamic parameters - including tON (500 ns max) and tOFF (300 ns max) - are characterized and guaranteed across the full temperature range.

What is the purpose of the VL pin on MAX4669CSE, and can it be tied to V+?

The VL pin on MAX4669CSE provides a dedicated logic supply input, independent of the analog rails, to reduce digital switching noise coupling into analog paths. It accepts +2.7V to +5.5V and must not be tied directly to V+ unless V+ falls within that range and is well-regulated and filtered. Doing so risks violating the absolute maximum rating for VL (GND − 0.3V to V+ + 0.3V) and may degrade noise immunity. For ±15V dual-supply operation, VL is typically connected to a clean +5V rail separate from analog supplies.

Does MAX4669CSE require external protection diodes for overvoltage, and when are they recommended?

External protection diodes are not required for normal operation of MAX4669CSE but are recommended if power-supply sequencing cannot be guaranteed - specifically, if V+ and V− may be applied after logic or analog signals. Per Maxim's Application Information, diodes (e.g., 1N4148) should be placed in series with V+ and V− pins to clamp transients. This reduces usable analog signal range by ~0.7V but preserves RON and leakage specs. Diodes are not advised for single-supply use, as V− is tied to GND and clamping would compromise ground reference integrity.

How does the MAX4669CSE pinout differ from MAX4667CSE and MAX4668CSE?

The MAX4669CSE shares identical pinout and package with MAX4667CSE and MAX4668CSE - all use the same 16-pin narrow SOIC layout. However, internal switch configuration differs: MAX4667CSE has two NC switches, MAX4668CSE has two NO switches, and MAX4669CSE has one NC (Switch 1) and one NO (Switch 2), with guaranteed break-before-make timing between them. Pin functions (e.g., IN1/IN2, COM1/COM2, V+/V−, VL, GND) are identical across all three parts, enabling drop-in replacement in layouts where only logic polarity and switching behavior are modified in firmware or external control.