Analog Devices Inc./Maxim Integrated MAX318ESA+T

Overview

MAX318ESA+T from Maxim Integrated is a precision CMOS single-pole single-throw (SPST) analog switch with normally open (NO) configuration, 35Ω maximum on-resistance, <10pC charge injection, and ±44V breakdown voltage. It operates from bipolar supplies (±4.5V to ±20V) or single supply (+10V to +30V), enabling rail-to-rail signal switching in test equipment and guidance systems.

For engineers reviewing the MAX318ESA+T datasheet, MAX318ESA+T pinout, MAX318ESA+T application, or MAX318ESA+T equivalent, key selection criteria include guaranteed on-resistance matching (<2Ω), low leakage (<6nA at +85°C), fast switching (t_ON < 175ns), ESD tolerance (>±2000V), and SO-8 package compatibility with industrial temperature range (-40°C to +85°C).

Technical Context

The MAX318ESA+T implements a silicon-gate CMOS transmission gate architecture optimized for low distortion and minimal signal path perturbation. Its design guarantees flat on-resistance (∆3Ω max) over full analog signal range and matched channel resistance-critical for precision sample-and-hold and multiplexing where gain/offset tracking matters.

It supports dual-supply operation with independent logic-level supply (VL) referenced to GND, allowing TTL/CMOS-compatible control while handling analog signals spanning V− to V+. The internal substrate is tied to V+, enhancing latch-up immunity and enabling robust operation in mixed-signal environments like military radios and PBX systems.

Key Specifications

Pinout & Package

MAX318ESA+T is housed in an 8-pin SO (Small Outline) package, 150-mil body width, with standard JEDEC MO-153 footprint and gull-wing leads. Pin 1 is marked by a beveled corner or dot; device orientation follows standard SO polarity convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRMZ and TS5A23157DCKR, the MAX318ESA+T uniquely delivers guaranteed on-resistance matching, bipolar supply support up to ±20V, and flat R_ON over full signal range - making it irreplaceable in precision guidance, test, and military-grade analog signal routing where parameter consistency across temperature and voltage is mandatory.

Availability

MAX318ESA+T is available at Aetrix Electronics and suitable for test equipment, guidance and control systems, heads-up displays, and military radio applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX318ESA+T 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 aerospace markets.

The MAX317/MAX318/MAX319 family was designed specifically for precision analog signal routing in harsh environments - emphasizing low distortion, guaranteed parameter matching, and robust operation across military and industrial temperature ranges.

FAQ

What is the operating temperature range for the MAX318ESA+T?

The MAX318ESA+T is specified for operation from −40°C to +85°C. This extended industrial temperature range is confirmed in the Ordering Information table and Electrical Characteristics sections of the datasheet, where parameters such as on-resistance, leakage current, and switching time are guaranteed across this full span. The "E" grade suffix explicitly denotes this temperature rating, distinguishing it from the "C" grade (0°C to +70°C) versions.

Does the MAX318ESA+T support single-supply operation?

Yes, the MAX318ESA+T supports single-supply operation from +10V to +30V. When used in single-supply mode, V− must be connected to GND, and VL should be tied to either +5V (for TTL compatibility) or to V+ (for CMOS logic levels). The datasheet confirms this in both the Features list and Applications Information section, with dedicated Electrical Characteristics tables for single-supply conditions including R_ON, t_ON, and leakage.

What is the maximum analog signal voltage the MAX318ESA+T can handle?

The MAX318ESA+T supports rail-to-rail analog signal handling from V− to V+, with a maximum breakdown voltage of +44V (referenced to V−). This means it can safely switch signals up to ±20V with bipolar supplies or up to +30V with single supply, provided the absolute voltage at any terminal stays within Absolute Maximum Ratings - e.g., COM, NO, and IN pins must remain between (V− − 2V) and (V+ + 2V).

Is the MAX318ESA+T pin-compatible with other devices in the MAX317/MAX318/MAX319 family?

Yes, the MAX318ESA+T shares identical pinout and package (SO-8) with MAX317ESA and MAX319ESA. All three variants use the same physical layout: Pin 1 = COM, Pin 2 = N.C., Pin 3 = GND, Pin 4 = V+, Pin 5 = VL, Pin 6 = IN, Pin 7 = V−, Pin 8 = NO (MAX318), NC (MAX317), or COM (MAX319). Functional differences lie only in internal switch configuration - not pin assignment or footprint.

What logic families are compatible with the MAX318ESA+T control input?

The MAX318ESA+T IN pin is compatible with both TTL and CMOS logic families. Its input thresholds are specified as VINL ≤ 0.8V (low) and VINH ≥ 2.4V (high) at VL = 5V, with input current < ±0.5µA - meeting standard TTL voltage levels and driving light CMOS loads. The separate VL pin allows direct interfacing to 3.3V or 5V logic without level shifters, as confirmed in the Logic Input Characteristics table.