Analog Devices Inc./Maxim Integrated MAX351CSE

Overview

MAX351CSE from Maxim Integrated is a precision quad SPST analog switch with four normally closed (NC) channels, designed for high-fidelity signal routing in precision instrumentation and military-grade systems. It delivers on-resistance <35Ω (typ. 22Ω), matched within 2Ω between channels, flatness ≤3Ω over ±15V analog range, <250pA leakage at +25°C, and switching times <175ns (tON)/<145ns (tOFF). It operates from ±4.5V to ±20V or +10V to +30V supplies and supports rail-to-rail analog signal handling.

For engineers reviewing the MAX351CSE datasheet, MAX351CSE pinout, MAX351CSE application, or MAX351CSE equivalent, key selection criteria include guaranteed on-resistance matching, low charge injection (≤10pC), ESD robustness (>2000V), bipolar/single-supply flexibility, and NC-switch topology for fail-safe signal path closure in sample-and-hold or guidance systems.

Technical Context

The MAX351CSE implements four independent normally closed analog switches using Maxim's 44V silicon-gate process, enabling rail-to-rail operation up to ±20V or +30V. Its CMOS-compatible logic inputs (VL = 5V or V+) drive transmission gates with tightly controlled threshold matching to ensure channel-to-channel on-resistance uniformity.

Charge injection is minimized to ≤10pC via matched transistor sizing and layout symmetry, critical for precision sample-and-hold accuracy. Off-isolation exceeds 68dB and crosstalk remains below –85dB at 1MHz, supporting high-channel-density multiplexing without signal coupling.

Key Specifications

Pinout & Package

MAX351CSE is housed in a 16-pin narrow SOIC (Small Outline Integrated Circuit) package, 7.5mm × 5.3mm body, 1.75mm height, 0.635mm lead pitch, RoHS-compliant, rated for 0°C to +70°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX352CSE, MAX351CSE provides fail-safe continuity; compared with ADG1414BRUZ, it delivers tighter on-resistance matching and lower charge injection at the cost of fixed NC topology and narrower temperature range - making it preferred for precision, safety-critical analog routing.

Availability

MAX351CSE is available at Aetrix Electronics and suitable for sample-and-hold circuits, military radios, and guidance and control systems requiring stable component supply, long-term obsolescence management, and traceable sourcing for defense and aerospace programs.

Supply support for MAX351CSE 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 demanding industrial, automotive, communications, and defense applications.

The MAX351/MAX352/MAX353 family was engineered specifically for precision analog signal routing in mil-spec and high-reliability systems, emphasizing low distortion, guaranteed parameter matching, and robust operation across extreme supply and temperature conditions.

FAQ

What is the default switch state of MAX351CSE?

The MAX351CSE features four normally closed (NC) analog switches - meaning each channel conducts between COM and NC terminals when its corresponding IN pin is logic low (≤0.8V). This fail-safe behavior ensures signal continuity during power loss or controller reset, making MAX351CSE ideal for safety-critical analog paths in guidance systems and military radios.

Does MAX351CSE support single-supply operation?

Yes, MAX351CSE operates from a single positive supply ranging from +10V to +30V. When used in single-supply mode, connect V− to ground, set VL to +5V for TTL compatibility (or tie VL to V+ for CMOS logic levels), and route analog signals between 0V and V+. The device maintains rail-to-rail capability, supporting full V+ swing at the COM/NC terminals.

What is the maximum analog signal voltage range supported by MAX351CSE?

MAX351CSE supports analog signal voltages from V− to V+, with absolute maximum ratings of V+ ≤ +44V and V− ≥ –44V relative to each other. In standard ±15V operation, the usable analog range is ±15.5V (e.g., V+ = +16.5V, V− = –16.5V), enabling true rail-to-rail signal handling without clipping or distortion - a key requirement in MAX351CSE applications like test equipment and communications systems.

How does MAX351CSE achieve low charge injection?

MAX351CSE achieves ≤10pC charge injection through matched transistor geometry, symmetric layout, and Maxim's 44V silicon-gate process. This minimizes voltage glitches on hold capacitors during switching transitions - directly improving acquisition accuracy in sample-and-hold circuits. The guaranteed spec applies across temperature and supply voltage, ensuring consistent performance in MAX351CSE-based precision data acquisition systems.

Is MAX351CSE pin-compatible with other devices in the MAX35x family?

Yes, MAX351CSE shares identical pinout and footprint with MAX352CSE and MAX353CSE in the 16-pin narrow SOIC package. All three variants use the same terminal assignments for IN, COM, NC/NO, V+, V−, VL, and GND. This allows direct PCB reuse across NC-only (MAX351CSE), NO-only (MAX352CSE), and mixed (MAX353CSE) configurations - simplifying design flexibility and inventory management for MAX351CSE users.