Analog Devices Inc./Maxim Integrated MAX319CSA

Overview

MAX319CSA from Maxim Integrated is a precision SPDT CMOS analog switch with one normally open (NO) and one normally closed (NC) channel, designed for rail-to-rail signal routing in precision instrumentation. It delivers <35Ω max on-resistance, <10pC charge injection, <6nA off-leakage at +85°C, and 175ns max turn-on time. It operates from ±4.5V to ±20V bipolar or +10V to +30V single supply, supporting guidance systems and test equipment.

For engineers reviewing the MAX319CSA datasheet, MAX319CSA pinout, MAX319CSA application, or MAX319CSA equivalent, key selection criteria include guaranteed matched on-resistance (<2Ω), flat on-resistance over signal range (∆3Ω max), ESD tolerance (>±2000V), and dual-supply compatibility - all critical for low-distortion sample-and-hold and military radio front-ends.

Technical Context

The MAX319CSA implements a silicon-gate CMOS SPDT architecture with break-before-make switching (5–13ns delay), enabling safe signal path transitions without momentary shorting. Its analog terminals (COM, NO, NC) support full rail-to-rail operation up to ±15.5V, while logic input (IN) accepts TTL/CMOS levels referenced to VL (typically +5V).

Charge injection is tightly controlled (<10pC typ) via matched transistor design and layout symmetry, minimizing voltage glitch in high-impedance sample-and-hold nodes. Off-isolation exceeds 68dB at 1MHz, and crosstalk remains below –85dB, ensuring signal integrity in multi-channel guidance and comms systems.

Key Specifications

Pinout & Package

MAX319CSA is housed in an 8-pin narrow SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant, with gull-wing leads and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRMZ and TS5A3159DCKR, the MAX319CSA uniquely supports true bipolar operation, guarantees matched on-resistance, and delivers sub-10pC charge injection at ±15V - making it irreplaceable in precision sample-and-hold and military-grade signal routing where voltage range and transient fidelity are non-negotiable.

Availability

MAX319CSA is available at Aetrix Electronics and suitable for guidance and control systems, test equipment, and military radios requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX319CSA 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX317/MAX318/MAX319 family was engineered specifically for precision analog signal routing in environments requiring low distortion, high isolation, and robust ESD tolerance - targeting military, aerospace, and automated test equipment markets.

FAQ

What is the maximum analog signal voltage range supported by the MAX319CSA?

The MAX319CSA supports rail-to-rail analog signal handling from V− to V+, with absolute maximum ratings of V+ ≤ V− + 44V. Under bipolar operation (e.g., V+ = +15V, V− = −15V), the analog signal range spans ±15.5V on COM, NO, and NC terminals. This allows full utilization of ±12V or +24V system rails without external level shifting - a key capability confirmed in the Electrical Characteristics tables for dual-supply conditions.

Does the MAX319CSA require separate logic and analog grounds?

No, the MAX319CSA uses a single GND pin (Pin 3) for logic reference, and does not require isolated or split grounds. The device integrates internal level-shifting circuitry between VL (logic supply) and the analog switches, allowing GND to serve as the common reference for both domains. This simplifies PCB layout and avoids ground-loop complications - verified in the Pin Description table and Applications Information section describing VL connection methods.

Can the MAX319CSA operate from a single +12V supply?

Yes, the MAX319CSA supports single-supply operation from +10V to +30V. When using +12V, connect V− to GND, set VL = +5V for TTL compatibility, and ensure analog signals remain within 0V to +12V. Data sheet Section "ELECTRICAL CHARACTERISTICS - Single Supply" confirms R(ON) = 40–100Ω and tON = 110ns under these conditions - validating functionality in battery-powered and industrial control applications.

What is the guaranteed on-resistance match between the NO and NC channels of the MAX319CSA?

The MAX319CSA guarantees on-resistance match of <2Ω between its NO and NC channels at +25°C, and <3Ω across the full operating temperature range (0°C to +70°C for the CSA grade). This specification is explicitly stated in the "On Resistance Match Between Channels" row of the dual-supply Electrical Characteristics table and applies only under bipolar supply conditions - a critical parameter for differential signal integrity and calibration accuracy.

Is the MAX319CSA pin-compatible with other devices in the MAX317/MAX318/MAX319 family?

Yes, the MAX319CSA shares identical pinout and package (8-pin SO) with MAX317CSA and MAX318CSA, as confirmed in the "Pin Configurations" diagram and "Ordering Information" table. All three variants use Pins 1 (COM), 2 (NO for MAX319), 3 (GND), 4 (V+), 5 (VL), 6 (IN), 7 (V−), and 8 (NC for MAX319). This allows drop-in replacement in layouts designed for any member of the family - provided functional differences (NO/NC configuration) are accounted for in firmware or schematic.