Renesas DG409DJ

Overview

DG409DJ from Renesas Electronics is a differential 4-channel CMOS analog multiplexer in 16-lead PDIP package, designed for bidirectional signal routing in precision analog systems. It features ≤100 Ω ON resistance, <250 ns transition time, ±15 V analog signal range, TTL/CMOS-compatible logic inputs, and operates from ±5 V to ±20 V dual supplies or +5 V to +34 V single supply. It serves as a drop-in upgrade for DG509A in data acquisition and audio switching.

For engineers reviewing the DG409DJ datasheet, DG409DJ pinout, DG409DJ application, or DG409DJ equivalent, key selection criteria include its differential channel architecture, low charge injection (≤20 pC), matched ON-resistance (Δr_DS(ON) ≤15 Ω), EN-controlled device enable, and Pb-free PDIP packaging suitable for through-hole wave soldering.

Technical Context

The DG409DJ implements a fully decoded 2-bit address (A1, A0) with active-low ENABLE to select one of four differential pairs (S1A/S1B–S4A/S4B → DA/DB). Its silicon-gate CMOS process eliminates latch-up and supports rail-to-rail analog operation across its full ±15 V range under ±15 V supplies.

Each switch exhibits bilateral conduction, low OFF capacitance (14 pF drain, 3 pF source), and sub-1 nA leakage at ±10 V - enabling high-accuracy sample-and-hold and low-crosstalk communication signal routing without external buffering.

Key Specifications

Pinout & Package

Package: 16-lead Plastic Dual-In-Line (PDIP), JEDEC MS-001-BB, body size 0.735–0.775 inch × 0.300–0.325 inch, lead pitch 0.100 inch. RoHS-compliant Pb-free variant available as DG409DJZ.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG409BRZ and MAX4054EPP, the DG409DJ uniquely delivers differential 4-channel switching in through-hole PDIP with ±20 V capability and guaranteed ≤100 Ω ON resistance - making it optimal for industrial data acquisition and legacy test equipment upgrades.

Availability

DG409DJ is available at Aetrix Electronics and suitable for data acquisition systems, audio switching systems, and automatic test equipment requiring stable component supply and long-term obsolescence management.

Supply support for DG409DJ 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.

The DG409DJ belongs to Renesas' precision analog multiplexer product line, engineered for high-fidelity signal routing in measurement, test, and control systems where channel matching, low leakage, and robust supply flexibility are essential.

FAQ

What is the maximum allowable supply voltage difference for the DG409DJ?

The DG409DJ supports a maximum V+ to V− differential of 44 V. This allows operation from ±5 V to ±20 V dual supplies or +5 V to +34 V single supply. Exceeding 44 V risks permanent damage, as confirmed in the Absolute Maximum Ratings table on page 4 of FN3283 Rev 8.00. The DG409DJ must also observe GND-to-V− limits (≤25 V) and input voltage clamping constraints.

Does the DG409DJ support true differential signal switching?

Yes, the DG409DJ implements four independent differential switch pairs (S1A/S1B → DA/DB, etc.), each with matched ON-resistance (Δr_DS(ON) ≤15 Ω) and symmetrical layout. Its pinout separates A-side and B-side inputs and provides dedicated DA and DB outputs - enabling balanced signal routing without external inversion or coupling components. This is distinct from single-ended multiplexers like the DG408DJ.

Can the DG409DJ be used with single-supply systems?

Yes, the DG409DJ operates from a single +5 V to +34 V supply. When V− = 0 V, its analog signal range is 0–12 V (per page 5, single-supply test conditions). Logic thresholds remain TTL/CMOS-compatible, and leakage currents stay below 5 nA. However, the full ±15 V range and lowest ON-resistance (40 Ω typ.) require dual ±15 V supplies as specified in the primary electrical characteristics table.

What is the purpose of the ENABLE (EN) pin on the DG409DJ?

The EN pin on the DG409DJ is an active-high digital input that globally enables or disables all internal analog switches. When EN = 0 V, all channels remain open regardless of address inputs (A0/A1), providing hardware-level isolation. When EN = 2.4 V minimum, channel selection resumes. Its turn-on/off times (<150 ns) allow synchronized gating of analog paths in time-critical systems like burst-mode data loggers.

Is the DG409DJ pin-compatible with the DG509A it replaces?

Yes, the DG409DJ is a drop-in replacement for the DG509A, sharing identical 16-pin PDIP footprint, pin functions, and logic-level compatibility. Key improvements - including lower ON resistance (<100 Ω vs. ~200 Ω), faster switching (<250 ns vs. ~500 ns), and reduced charge injection - require no PCB changes. The DG409DJ maintains the same truth table and absolute maximum ratings, enabling direct substitution in legacy designs.