Analog Devices Inc./Maxim Integrated MAX4632CSE+

Overview

MAX4632CSE+ from Maxim Integrated is a fault-protected, high-voltage dual SPDT analog switch with rail-to-rail signal handling, ±25V fault protection on NO/NC pins (with ±15V supplies), 85Ω max on-resistance at +25°C, and TTL/CMOS-compatible logic inputs. It operates from ±4.5V to ±18V dual supplies or +9V to +36V single supply and is used in industrial process control systems where overvoltage transients must be contained without disrupting downstream circuitry.

For engineers reviewing the MAX4632CSE+ datasheet, MAX4632CSE+ pinout, MAX4632CSE+ application, or MAX4632CSE+ equivalent, key selection criteria include verified fault-protection voltage limits (±25V with ±15V supplies), matched on-resistance (≤6Ω between channels), off-isolation (−62dB at 1MHz), break-before-make timing (5–40ns), and SO-16 narrow package compatibility with legacy DG403 layouts.

Technical Context

The MAX4632CSE+ uses parallel N- and P-channel FETs per channel with dedicated voltage-sensing circuitry to detect overvoltage faults (>±25V on NO/NC pins) and instantly disconnect COM while clamping output to the appropriate supply rail. Its internal structure eliminates power-supply sequencing requirements and ensures all switches remain off during power-down.

Unlike traditional series-FET fault-protected switches, this architecture delivers rail-to-rail analog conduction (V_COM = V_NO/V_NC across full supply range) with low on-resistance and no transition glitches during fault onset or recovery - critical for precision data acquisition and avionics backup switching.

Key Specifications

Pinout & Package

MAX4632CSE+ is housed in a 16-pin narrow SO package (SOIC-N16), 3.9mm width, with standard JEDEC MS-012AC footprint and 1.27mm pitch. Pin 1 is marked by notch or dot; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4632ESE+ and ADG408BRUZ, the MAX4632CSE+ provides optimal balance of fault resilience, SO-16 footprint compatibility with legacy DG403 layouts, and commercial-temperature performance - making it ideal for cost-sensitive industrial instrumentation where transient immunity is mandatory but extended temperature range is not.

Availability

MAX4632CSE+ is available at Aetrix Electronics and suitable for industrial process control, avionics redundancy switching, data acquisition systems, and ATE equipment requiring stable component supply and guaranteed long-term sourcing.

Supply support for MAX4632CSE+ 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 high-reliability semiconductor solutions for industrial, automotive, and communications markets.

The MAX463x family was engineered specifically for fault-tolerant analog signal routing in harsh environments - delivering rail-to-rail conduction, robust overvoltage protection, and seamless drop-in replacement for legacy DG-series switches without layout changes.

FAQ

What is the maximum fault voltage the MAX4632CSE+ can withstand on its NO/NC pins?

The MAX4632CSE+ withstands ±25V on NO/NC pins when powered with ±15V supplies, and ±40V when fully unpowered. Exceeding these limits risks permanent damage. This rating is specific to the MAX4632 variant - MAX4631/MAX4633 support ±36V under same conditions. Always verify supply configuration before applying fault voltages to MAX4632CSE+.

Does the MAX4632CSE+ require power-supply sequencing during startup?

No, the MAX4632CSE+ does not require power-supply sequencing. V+, V−, and GND may be applied in any order without causing latch-up or undefined switch states. This feature simplifies power management in systems with multiple independent rails and ensures reliable operation during brownout or hot-swap scenarios involving MAX4632CSE+.

Can the MAX4632CSE+ operate from a single +24V supply?

Yes, the MAX4632CSE+ supports single-supply operation from +9V to +36V. For +24V use, connect V− to GND and ensure logic inputs meet the adjusted thresholds (VINH ≈ 2.6V, VINL ≈ 0.8V). On-resistance increases slightly versus ±15V operation, remaining within 125Ω max at +25°C - fully acceptable for most 24V industrial signal routing applications using MAX4632CSE+.

What is the purpose of the N.C. pins (2, 7, 12) on the MAX4632CSE+?

Pins 2, 7, and 12 on the MAX4632CSE+ are No Connect (N.C.) - they have no internal connection and serve only mechanical or thermal roles. These pins must be left floating or tied to GND per PCB layout guidelines; routing traces to them provides no functional benefit and may increase noise coupling. Their presence maintains pin compatibility with DG403 footprints in MAX4632CSE+ designs.

How does the MAX4632CSE+ handle fault conditions on its COM terminal?

The MAX4632CSE+ does not provide fault protection on the COM terminal - only NO and NC pins are protected. If overvoltage occurs on COM, internal ESD diodes clamp to V+ or V−, but sustained overvoltage may cause damage. System design must ensure COM remains within (V− − 0.3V) to (V+ + 0.3V) at all times. This limitation applies strictly to MAX4632CSE+ and is documented in Absolute Maximum Ratings.