Vishay Siliconix DG458DJ

Overview

DG458DJ from Vishay Siliconix is a fault-protected, single-ended 8-channel analog multiplexer with ±35 V continuous overvoltage tolerance, 180 Ω typical on-resistance at ±5 V supplies, 200 ns transition time, and break-before-make switching. It operates across –40 °C to +85 °C in a 16-pin plastic DIP package and is used in high-reliability data acquisition systems where sensor signal integrity must be preserved during power loss or transient overvoltages.

For engineers reviewing the DG458DJ datasheet, DG458DJ pinout, DG458DJ application, or DG458DJ equivalent, key selection criteria include its fault-protected channel architecture, TTL/CMOS-compatible digital control, off-isolation of 90 dB at 100 kHz, and guaranteed operation with ±4.5 V to ±18 V dual supplies - critical for avionics test equipment and industrial process control interfaces.

Technical Context

The DG458DJ uses a three-MOSFET series structure per channel (two n-channel, one p-channel) enabling intrinsic overvoltage protection even with power supplies off. Its latchup-proof design prevents adjacent channel crosstalk during fault conditions, and all channels automatically disable when V+ or V– is unpowered.

Break-before-make timing ensures no channel-to-channel shorting during address changes, with a guaranteed 45 ns minimum open interval. Digital inputs meet TTL thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.4 V), and the internal decoder drives all eight analog switches without external logic.

Key Specifications

Pinout & Package

Package: 16-pin plastic DIP (Dual-In-Line), JEDEC MS-001, body width 7.62 mm, lead pitch 2.54 mm, RoHS-compliant (DG458DJ-E3 variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HI-508A and MAX358, the DG458DJ delivers superior fault resilience, tighter channel matching (6% R_DS(on) matching), and deterministic break-before-make timing - making it the preferred choice for safety-critical and high-accuracy analog signal routing where supply instability or sensor overvoltage is possible.

Availability

DG458DJ is available at Aetrix Electronics and suitable for data acquisition systems, avionics test equipment, and industrial process control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DG458DJ 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

Vishay Siliconix is a global semiconductor manufacturer specializing in discrete components and analog ICs, with leadership in high-reliability, high-voltage, and fault-tolerant solutions.

The DG458DJ belongs to Vishay's fault-protected analog switch family, engineered specifically for harsh-environment signal routing where sensor integrity, power-loss immunity, and transient resilience are non-negotiable design requirements.

FAQ

What is the maximum continuous overvoltage rating for DG458DJ with power supplies off?

The DG458DJ sustains ±35 V continuous analog input overvoltage even when V+ and V− are unpowered. Under this condition, input leakage remains below ±2 nA, and the device presents an open-circuit impedance to protect upstream sensors - a core feature confirmed in the Absolute Maximum Ratings table and Figure 5 of the DG458/DG459 datasheet (Document Number: 70064, Rev. H).

Does DG458DJ require external pull-up resistors on its address pins (A0–A2)?

No, DG458DJ does not require external pull-up resistors on A0–A2 or EN. Its digital inputs are TTL/CMOS compatible with defined thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.4 V) and exhibit ±1 µA max input current across temperature - allowing direct connection to microcontroller GPIOs or FPGA outputs without additional biasing components.

Can DG458DJ operate with asymmetric supply voltages such as +12 V and –5 V?

Yes, DG458DJ supports asymmetric dual supplies as long as V+ to V− does not exceed 44 V and each rail stays within its absolute limits: V+ to GND ≤ +22 V, V− to GND ≥ –25 V. For example, +12 V / –5 V yields a 17 V differential - well within spec - and maintains full ±10 V analog signal range and fault protection functionality.

What is the typical charge injection of DG458DJ, and how does it affect precision ADC applications?

DG458DJ exhibits ≤10 pC typical charge injection (Q_INJ), as shown in Figure 6 of the datasheet. In precision ADC front-ends, this results in <1 LSB error for 16-bit systems with ≤10 nF hold capacitors, provided the sample-and-hold aperture time exceeds the 1.5 µs 0.01% settling time - a value verified in the Dynamic Characteristics table.

Is DG458DJ pin-compatible with DG458DJ-E3, and what is the key distinction?

Yes, DG458DJ and DG458DJ-E3 share identical pinout, electrical specifications, and thermal characteristics. The sole difference is RoHS compliance: DG458DJ-E3 uses lead-free terminations and meets Directive 2011/65/EU, whereas DG458DJ contains leaded terminations (exempt per RoHS Annex III). Both are mechanically and electrically interchangeable in existing PCB layouts.