Analog Devices Inc./Maxim Integrated MAX394MJP

Overview

MAX394MJP from Maxim Integrated is a precision quad SPDT analog switch optimized for high-reliability industrial and aerospace applications. It operates across bipolar supplies (±2.7V to ±8V) or single supply (+2.7V to +15V), delivers <35Ω max on-resistance with <2Ω channel matching, maintains Δ4Ω max on-resistance flatness over signal range, and supports rail-to-rail analog signal handling from V− to V+. It is used in test equipment requiring low charge injection (≤10pC) and wide temperature operation.

For engineers reviewing the MAX394MJP datasheet, MAX394MJP pinout, MAX394MJP application, or MAX394MJP equivalent, key selection criteria include guaranteed -55°C to +125°C operating range, CERDIP package for hermetic reliability, break-before-make timing (10ns typ), sub-1µA quiescent current, and TTL/CMOS logic compatibility across supply voltages.

Technical Context

The MAX394MJP implements four independent CMOS SPDT switches using Maxim's low-voltage silicon-gate process. Each switch features matched P- and N-channel MOSFETs to achieve flat on-resistance versus signal voltage and low charge injection (≤10pC).

Its control architecture guarantees break-before-make switching (2–10ns delay), turn-on time <130ns, turn-off time <75ns, and off-isolation >66dBm at 1MHz. Logic inputs are compatible with TTL/CMOS levels (0.8V–2.4V up to +8V supplies; up to +4V above +8V), and analog terminals tolerate (V− −2V) to (V+ +2V) with internal clamping diodes.

Key Specifications

Pinout & Package

MAX394MJP is housed in a 20-pin CERDIP (ceramic dual in-line package) with hermetic sealing, rated for -55°C to +125°C operation and suitable for high-reliability, long-lifecycle deployments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX394MJP, MAX333ACPP offers identical footprint but sacrifices temperature range and low-glitch assurance, while ADG1414BRUZ improves RON and bandwidth but requires PCB redesign and lacks hermetic reliability-making MAX394MJP the sole choice for CERDIP-based, extended-temperature, low-charge-injection analog switching.

Availability

MAX394MJP is available at Aetrix Electronics and suitable for test equipment, portable instrumentation, communications systems, and heads-up displays requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX394MJP 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 power management ICs for demanding industrial, automotive, and communications applications.

The MAX394 product line delivers high-performance analog switches targeting applications needing guaranteed matching, low charge injection, and wide supply/temperature operation - especially where reliability and signal integrity are non-negotiable.

FAQ

What is the maximum supply voltage rating for MAX394MJP?

The MAX394MJP has an absolute maximum V+ to V− rating of 17V. It supports bipolar supplies from ±2.7V to ±8V and single supplies from +2.7V to +15V. Exceeding these limits risks permanent damage. The device also tolerates analog and logic signals from (V− −2V) to (V+ +2V) due to internal clamping diodes, provided forward current remains below 30mA continuous or 100mA peak (1ms, 10% duty cycle). This specification is confirmed in the Absolute Maximum Ratings table of the MAX394MJP datasheet.

Does MAX394MJP support rail-to-rail analog signal switching?

Yes, MAX394MJP supports true rail-to-rail analog signal handling: signals applied to COM, NO, or NC pins can range continuously from V− to V+, with no degradation in on-resistance or increased leakage. This capability is explicitly guaranteed in the datasheet's "Analog Signal Range" parameter (VCOM/VNO/VNC = V− to V+) and validated across all operating temperatures. The internal CMOS structure and level-shifting design eliminate dead zones near supply rails, making MAX394MJP suitable for full-scale audio, video, and sensor signal routing without external biasing.

What is the guaranteed on-resistance matching between channels for MAX394MJP?

The MAX394MJP guarantees on-resistance matching of less than 2Ω between any two channels (ΔRON < 2Ω), measured under specified conditions (VNC or VNO = ±3V, ICOM = 10mA, V+ = 5V, V− = −5V, TA = TMIN to TMAX). This matching is process-controlled and tested across the full −55°C to +125°C temperature range. It enables high-accuracy applications such as differential signal switching, ratiometric sensor multiplexing, and precision gain-setting networks where mismatch-induced errors must remain below 0.1%.

Is MAX394MJP pin-compatible with other variants in the MAX394 family?

Yes, MAX394MJP is pin-compatible with all standard MAX394 variants (e.g., MAX394CPP, MAX394EWP, MAX394MWP), sharing identical 20-pin DIP/SO/TSSOP/CERDIP pinouts and terminal functions. Pin compatibility is explicitly stated in the datasheet's "Pin Configuration" section and confirmed by identical pin numbering and labeling (IN1–IN4, NO1–NO4, COM1–COM4, NC1–NC4, V+, V−, GND, N.C.). However, thermal and electrical performance (e.g., leakage, RON flatness) is fully guaranteed only across the −55°C to +125°C range for the MJP grade.

What is the charge injection specification for MAX394MJP, and why does it matter?

MAX394MJP guarantees charge injection of ≤10pC, measured with CL = 1.0nF, VGEN = 0V, RGEN = 0Ω (per Figure 6 in the datasheet). This low value minimizes voltage glitches on high-impedance nodes - for example, in sample-and-hold circuits or switched-capacitor filters - where injected charge causes settling errors or distortion. At 10pC into a 100pF hold capacitor, the resulting glitch is just 100mV, enabling sub-12-bit accuracy in precision data acquisition systems. This spec is process-guaranteed and tested across temperature.