Analog Devices Inc./Maxim Integrated MAX4507CWN

Overview

The MAX4507CWN from Maxim Integrated is an 8-channel fault-protected analog signal-line protector designed for high-voltage input protection in industrial and test equipment signal paths. It features ±36V overvoltage protection with power on, 100Ω max on-resistance, <0.5nA input leakage at +25°C, and rail-to-rail signal handling across ±8V to ±18V dual supplies - enabling robust protection of sensitive data-acquisition front-ends against transient faults.

For engineers reviewing the MAX4507CWN datasheet, MAX4507CWN pinout, MAX4507CWN application, or MAX4507CWN equivalent, this device is selected when unipolar/bipolar analog signal integrity must be preserved under ±40V fault conditions with zero control logic, no latchup risk during power sequencing, and guaranteed open-circuit behavior with supplies off.

Technical Context

The MAX4507CWN integrates eight independent two-terminal protectors per package, each combining a low-on-resistance analog switch (N/P-channel pair) with dedicated voltage-sensing comparators and output clamp circuitry. During normal operation, it presents ≤100Ω series resistance between IN_ and OUT_; during overvoltage, internal clamps limit OUT_ to V+ or V− while isolating IN_ with nanoampere-level leakage.

It operates without logic inputs - always enabled when powered - and supports both dual-supply (±8V to ±18V) and single-supply (+9V to +36V) configurations. Fault response includes 10ns turn-on delay and sub-µs recovery, with output clamp resistance fixed at 500Ω during overvoltage events.

Key Specifications

Pinout & Package

MAX4507CWN is housed in an 18-pin SO (Small Outline) package with 0.300" body width and 0.050" lead pitch, compliant with JEDEC MS-013AC. Pin 1 is marked by a notch or dot; pin count proceeds counter-clockwise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fault-protected analog signal-path applications.

Compared with MAX4507CWN, MAX4507EWN extends thermal reliability without altering signal-path performance, while MAX4506CSA reduces channel count and footprint - neither offers pin-compatible replacement for 8-channel designs requiring the C-grade temperature range.

Availability

MAX4507CWN is available at Aetrix Electronics and suitable for process-control systems, hot-insertion boards/systems, and data-acquisition systems requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for MAX4507CWN 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.

The MAX4507 belongs to Maxim's fault-protected analog switch family, engineered specifically for ruggedized signal-path protection in harsh environments where overvoltage, hot-swap, and latchup immunity are mandatory design requirements.

FAQ

What is the maximum continuous overvoltage the MAX4507CWN can withstand with power applied?

The MAX4507CWN guarantees ±36V continuous overvoltage protection on its IN_ pins when power is applied (V+ and V− within operating range). This rating applies across the full specified temperature range and ensures the input remains isolated with nanoampere leakage while clamping the OUT_ pin to the nearest supply rail. Exceeding ±36V risks permanent damage to the internal protection circuitry. The MAX4507CWN must be operated within its absolute maximum ratings to maintain reliability.

Does the MAX4507CWN require external control signals to operate?

No, the MAX4507CWN requires no external logic or enable signals - it is an always-on protector activated automatically when V+ and V− are powered. Its eight channels conduct analog signals continuously as long as supplies are present and within specification. This simplifies system design by eliminating timing-critical enable sequencing and reducing PCB routing complexity. The MAX4507CWN functions identically across all channels without configuration overhead.

Can the MAX4507CWN be used with single-supply operation?

Yes, the MAX4507CWN supports single-supply operation from +9V to +36V (V− = GND). In this mode, it protects input signals from 0V to +36V and clamps OUT_ to either 0V or V+. Electrical characteristics including on-resistance (≤100Ω), leakage (<0.5nA), and fault response (10ns turn-on) remain fully specified. The MAX4507CWN maintains rail-to-rail signal handling from GND to V+, making it suitable for industrial sensors and PLCs using positive-only supplies.

What happens to the MAX4507CWN outputs when power is removed?

When V+ and V− are both at 0V, the MAX4507CWN places all IN_/OUT_ paths into a high-impedance open state - leakage is <10nA and OUT_ is clamped to 0V regardless of IN_ voltage (up to ±40V). This prevents backfeeding, eliminates false triggering of downstream circuitry, and ensures safe hot-removal. The MAX4507CWN's power-off behavior is intrinsic to its architecture and requires no external components to enforce.

Is the MAX4507CWN pin-compatible with other devices in its family?

Yes, the MAX4507CWN is pin-compatible with the MAX4507EWN (same 18-pin SO package, identical pinout) and shares functional equivalence with the MAX4506 series (3-channel variant), though channel count and package differ. All MAX4506/MAX4507 variants use identical signal routing (INx → OUTx) and supply pin locations (V+ on pin 18, V− on pin 9). The MAX4507CWN may be substituted for MAX4507EWN in 0°C to +70°C applications without layout changes.