Analog Devices Inc./Maxim Integrated MAX317CSA+

Overview

MAX317CSA+ from Maxim Integrated is a precision CMOS analog switch configured as a single-pole single-throw (SPST) normally closed (NC) device, featuring 35Ω maximum on-resistance, <2Ω channel-to-channel on-resistance matching, and rail-to-rail analog signal handling up to ±15V with ±15V dual supplies. It delivers fast switching (t_ON < 175ns), ultra-low charge injection (<10pC), and operates across 0°C to +70°C in an 8-pin SO package for signal routing in precision test equipment and military radios.

For engineers reviewing the MAX317CSA+ datasheet, MAX317CSA+ pinout, MAX317CSA+ application, or MAX317CSA+ equivalent, key selection criteria include guaranteed on-resistance flatness (∆3Ω max), sub-6nA off-leakage at +85°C, TTL/CMOS logic compatibility, and bipolar (+15V/–15V) or single-supply (+10V to +30V) operation - all critical for low-distortion sample-and-hold and guidance system designs.

Technical Context

The MAX317CSA+ implements a silicon-gate CMOS transmission gate architecture with substrate tied to V+, enabling robust rail-to-rail analog conduction and ESD tolerance >±2000V. Its logic interface accepts 0.8V/2.4V thresholds and supports both unipolar (e.g., +12V/V– = 0V) and bipolar supply configurations (±4.5V to ±20V).

Switching behavior is defined by a single IN control input driving the NC path: logic low enables conduction between COM and NC; logic high disconnects the path. Charge injection is minimized via matched transistor sizing and layout symmetry, ensuring <10pC under ±15V conditions - essential for high-fidelity sampling.

Key Specifications

Pinout & Package

MAX317CSA+ is housed in an 8-pin Small Outline (SO) package, 3.9mm × 4.9mm body, 1.27mm lead pitch, compliant with JEDEC MS-012. Pin 2 is internally unconnected (N.C.).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRMZ and TS5A23157DCUR, the MAX317CSA+ uniquely provides a factory-configured NC default state, guaranteed bipolar supply operation (±4.5V to ±20V), and validated rail-to-rail performance up to ±15V - making it irreplaceable in fail-safe analog monitoring and military-grade signal conditioning where power-off continuity is mandatory.

Availability

MAX317CSA+ is available at Aetrix Electronics and suitable for precision test equipment, military radio signal routing, and guidance and control systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX317CSA+ 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 series belongs to Maxim's precision analog switch product line, engineered specifically for low-distortion, low-leakage signal routing in military, aerospace, and automated test environments where reliability under extreme conditions is non-negotiable.

FAQ

What is the default (power-off) state of the MAX317CSA+ switch?

The MAX317CSA+ is a normally closed (NC) analog switch: when the IN pin is low or unpowered (with VL and V± supplies active), the COM and NC terminals are conductive. This fail-safe behavior ensures signal continuity during logic reset or controller failure - a key requirement in guidance systems and safety-critical instrumentation where open-circuit faults must be avoided. The MAX317CSA+ maintains this NC state even with VL = 0V, provided V+ and V− are powered.

Can the MAX317CSA+ operate from a single +12V supply?

Yes, the MAX317CSA+ supports single-supply operation from +10V to +30V. For +12V use, connect V− to ground (0V), set VL to +5V for TTL compatibility (or to +12V for CMOS logic), and ensure the analog signal stays within 0V to +12V. Note that on-resistance increases slightly (up to 100Ω max) and switching speed degrades versus bipolar operation - verify timing margins in your specific circuit using Figure 2 and MAX317-04 from the datasheet.

What is the maximum allowable voltage difference between V+ and V− for the MAX317CSA+?

The absolute maximum voltage difference between V+ and V− is +44V, as specified in the Absolute Maximum Ratings table. Exceeding this risks permanent device damage. For reliable operation, maintain V+ − V− ≤ 40V in continuous use, especially at elevated temperatures. At ±15V (30V total), the MAX317CSA+ achieves optimal on-resistance flatness and leakage performance - always refer to Figures MAX317-01 and MAX317-02 for R_ON vs. supply voltage and temperature dependencies.

How does charge injection affect sample-and-hold performance with the MAX317CSA+?

Charge injection of <10pC (typical 3pC) in the MAX317CSA+ causes a voltage step on the hold capacitor (ΔV = Q/C_HOLD). For a 1000pF capacitor, this yields ≤10mV glitch - acceptable for 10-bit accuracy but limiting for 12-bit+ systems. To mitigate, use smaller hold capacitors (e.g., 100pF) or add a small series resistor (10–50Ω) between the switch and capacitor to dampen ringing. The MAX317CSA+'s guaranteed <10pC spec ensures predictable, designable error - unlike non-precision switches with unguaranteed or higher injection.

Is the MAX317CSA+ pin-compatible with other variants in the MAX317/MAX318/MAX319 family?

No - the MAX317CSA+, MAX318CSA+, and MAX319CSA+ share the same 8-pin SO package footprint but differ in internal switch configuration and pin functions. Specifically, MAX317CSA+ uses Pin 8 as NC (normally closed), while MAX318CSA+ uses Pin 8 as COM and MAX319CSA+ uses Pin 2 as NO and Pin 8 as COM. Swapping them without redesigning the PCB will result in incorrect or non-functional switching behavior. Always verify pin mapping against the "Pin Description" table on page 6 of the MAX317–MAX319 datasheet before substitution.