Vishay Siliconix DG184AP

Overview

DG184AP from Vishay Siliconix is a radiation-hardened, dual DPST (double-pole, single-throw) JFET analog switch optimized for precision video and audio signal routing in aerospace and military systems. It features 30 Ω typical on-resistance, <2 nA channel-on leakage, 150 ns max turn-off time, and operates across –55 °C to +125 °C with ±15 V analog supply rails. Used in high-reliability sample/hold and video switching applications where flat r_DS(on) over full signal range is critical.

For engineers reviewing the DG184AP datasheet, DG184AP pinout, DG184AP application, or DG184AP equivalent, key selection criteria include its MIL-PRF-38535 Class B qualification (JM38510/11103BEA), sidebraze 16-pin hermetic package, break-before-make switching behavior, and guaranteed low crosstalk (<–60 dB at 10 MHz) - all essential for signal integrity in avionics timing and fault-tolerant routing.

Technical Context

The DG184AP integrates four n-channel JFETs with TTL-compatible bipolar drivers to deliver bidirectional conduction in the on-state and 20 V peak-to-peak blocking capability in the off-state. Its analog signal range spans –12.5 V to +10 V under standard bias conditions (V+ = +10 V, V– = –20 V), with logic inputs compatible with 0.8 V/2.0 V thresholds.

Designed for radiation-hardened environments, it employs JFET topology to ensure constant on-resistance across the analog range and eliminate large-signal distortion. Fault protection is implemented via internal clamping and isolation structures that suppress inadvertent channel shorting and limit feedthrough to <–60 dB at 10 MHz.

Key Specifications

Pinout & Package

Package: 16-pin sidebraze ceramic dual-in-line (DIP), hermetically sealed, military-grade construction with flat top marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DG184AP, DG183AP/883 offers lower on-resistance but reduced voltage headroom, while ADG1212BRUZ provides surface-mount convenience at the expense of radiation tolerance, analog range, and isolation performance - making DG184AP the sole choice for hardened dual-pole video/audio routing in flight-critical systems.

Availability

DG184AP is available at Aetrix Electronics and suitable for aerospace telemetry, avionics video routing, and military-grade sample-and-hold circuits requiring stable component supply across extended temperature and radiation-exposed operating conditions.

Supply support for DG184AP 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 semiconductors, analog switches, and power management components with emphasis on high-reliability, radiation-hardened, and military-qualified devices.

The DG184AP belongs to the DG183/184/185 family of radiation-hardened dual DPST JFET switches, designed specifically for precision analog signal routing in aerospace, defense, and satellite systems where signal fidelity and environmental survivability are non-negotiable.

FAQ

What is the maximum analog signal voltage range supported by the DG184AP?

The DG184AP supports an analog signal range of –12.5 V to +10 V when operated with V+ = +10 V and V– = –20 V. Under symmetric ±15 V supplies, the guaranteed range is –7.5 V to +15 V. This wide swing enables compatibility with legacy video standards and high-dynamic-range sensor interfaces without external level-shifting circuitry. The DG184AP's JFET architecture ensures flat on-resistance across this entire range, preserving signal linearity.

Is the DG184AP pin-compatible with the DG183AP/883 or DG185AP/883?

Yes, the DG184AP is pin-compatible with DG183AP/883 and DG185AP/883 - all share identical 16-pin sidebraze DIP pinout, terminal labeling, and functional assignment. However, on-resistance (30 Ω vs. 10 Ω vs. 75 Ω), leakage, and analog range differ significantly. System-level validation is required before substitution, as differences in r_DS(on) and signal swing affect gain accuracy and headroom margins in precision applications.

Does the DG184AP require external pull-up resistors on its logic inputs?

No, the DG184AP does not require external pull-up resistors on IN1 or IN2. Its TTL-compatible inputs accept 0.8 V (max) for logic low and 2.0 V (min) for logic high, and draw negligible input current (<20 μA). The internal bipolar driver stage provides sufficient noise margin and drive strength to interface directly with standard TTL or CMOS logic outputs without external biasing components.

What is the radiation hardness specification for the DG184AP?

The DG184AP is qualified to MIL-PRF-38535 Class B under part number JM38510/11103BEA, certifying it for total ionizing dose (TID) tolerance exceeding 100 krad(Si) and single-event latchup (SEL) immunity per MIL-STD-883 TM1019. This makes the DG184AP suitable for use in low-Earth orbit (LEO) satellites, missile guidance systems, and nuclear-hardened ground stations where sustained radiation exposure is expected.

Can the DG184AP operate with a single +5 V supply?

No, the DG184AP cannot operate with a single +5 V supply. It requires separate analog supply rails (V+ and V–) to bias the JFET channels, plus dedicated logic (VL = +5 V) and reference (VR = GND) supplies. Minimum recommended analog rail separation is ±12 V; operation below ±10 V risks violating guaranteed on-resistance and leakage specifications. Single-supply operation is not supported by the device architecture or qualification test plan.