Renesas DG211CY

Overview

DG211CY from Intersil is a quad SPST analog switch IC designed for bidirectional signal routing in instrumentation and process control systems. It supports ±15V analog signal switching, features 175Ω maximum ON-resistance, 70dB OFF isolation at 100kHz, and TTL-compatible logic inputs accepting negative voltages - enabling direct interface with legacy industrial controllers.

For engineers reviewing the DG211CY datasheet, DG211CY pinout, DG211CY application, or DG211CY equivalent, key selection criteria include its 16-lead SOIC package, -15V to +15V analog rail capability, sub-500ns switching times, and guaranteed 0°C to +70°C operation without derating.

Technical Context

The DG211CY implements four independent CMOS transmission gates with substrate-connected V+ (pin 13) and dual supply rails (V+ = +15V, V− = −15V), allowing true bidirectional analog conduction up to ±15V peak-to-peak. Each channel exhibits matched r_DS(ON) ≤175Ω and <5pF OFF-capacitance per terminal.

Logic control uses VL = +5V referenced to GND (pin 5), with input thresholds defined as logic "0" ≤0.8V and logic "1" ≥2.4V - supporting direct connection to 5V TTL/CMOS while tolerating negative voltage on INx pins. No internal level-shifting circuitry is used; logic compatibility relies on gate oxide robustness and input clamp structures.

Key Specifications

Pinout & Package

Package: 16-lead narrow-body SOIC (M16.15), RoHS-compliant, Pb-free matte tin termination, compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4617ESE+ and ADG411BRZ, the DG211CY provides native ±15V analog switching and TTL-compatible inputs without external components - making it optimal for cost-sensitive industrial control designs where supply architecture matches legacy ±15V rails.

Availability

DG211CY is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, process control I/O modules, and medical signal conditioning requiring stable component supply across long-lifecycle programs.

Supply support for DG211CY 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

Intersil Corporation (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial and aerospace applications.

The DG211CY belongs to Intersil's legacy analog switch product line, engineered specifically for robust operation in harsh industrial environments with wide analog voltage ranges and direct TTL interfacing.

FAQ

What is the maximum analog signal voltage the DG211CY can switch?

The DG211CY supports analog signals from −15V to +15V relative to V− and V+, as specified in the Absolute Maximum Ratings and Electrical Specifications tables. This ±15V range allows direct switching of industrial sensor outputs, DACs, and op-amp signals without external level shifting or attenuation. The DG211CY must be operated with V+ = +15V and V− = −15V to guarantee full ±15V analog performance.

Does the DG211CY require external level-shifting for TTL logic inputs?

No, the DG211CY does not require external level-shifting for TTL logic inputs. Its IN1–IN4 pins accept logic "0" ≤0.8V and logic "1" ≥2.4V referenced to GND, and tolerate input voltages from −0.3V to +5.5V. This native TTL compatibility - including negative voltage tolerance - eliminates the need for external buffers or translators when interfacing with standard 5V microcontrollers or PLC outputs. The DG211CY achieves this via integrated input protection structures, not external circuitry.

What is the purpose of the V+ (pin 13) connection on the DG211CY?

Pin 13 (V+) on the DG211CY is the substrate connection for the CMOS process and must be tied to the positive supply rail (+15V). Unlike a typical power supply pin, it serves as the bulk bias for the internal P-channel MOSFETs and prevents latch-up when switching bipolar analog signals. Leaving V+ unconnected or connecting it to an incorrect voltage violates the Absolute Maximum Ratings and risks permanent device failure. The DG211CY datasheet explicitly states V+ must be connected to +15V for proper operation.

Can the DG211CY be used with a single +5V supply instead of ±15V?

No, the DG211CY cannot be operated reliably with only a +5V supply. Its analog signal range, ON-resistance, and OFF-isolation specifications are guaranteed only when V+ = +15V and V− = −15V. Using a single +5V supply violates the Absolute Maximum Ratings for V+ to V− (44V min) and VS/VD to V− (0V to 36V), and results in undefined switching behavior, excessive leakage, and potential damage. The DG211CY is fundamentally a dual-supply device; the DG211CY requires both rails to function as specified.

Is the DG211CY pin-compatible with other packages in the DG211 family?

Yes, the DG211CY (16-lead SOIC) shares identical pinout and electrical functionality with the DG211CJ (PDIP) and DG211CVZ (TSSOP) variants. All three use the same top-view pin numbering, terminal assignments, and logic truth table. Mechanical differences exist in package dimensions and thermal resistance (SOIC θ_JA = 120°C/W vs. PDIP = 100°C/W), but PCB layout can reuse the same footprint for SOIC and TSSOP versions if pad geometry aligns with M16.15 and M16.173 drawings. The DG211CY maintains full functional equivalence across these packages.