Texas Instruments ISO7330FCDWR

Overview

ISO7330FCDWR from Texas Instruments is a triple-channel, unidirectional digital isolator with capacitive SiO₂ isolation barrier, 3000 VRMS/4242 VPK reinforced insulation rating, 25 Mbps signaling rate, and default-low fail-safe output behavior. It operates across 3.3 V and 5 V supplies, supports level translation, and targets industrial fieldbus and motor control interfaces requiring robust EMC and long-term isolation reliability.

For engineers reviewing the ISO7330FCDWR datasheet, ISO7330FCDWR pinout, ISO7330FCDWR application, or ISO7330FCDWR equivalent, key selection criteria include its 3-channel forward-only topology, integrated input noise filter, 70 kV/μs CMTI (5 V), –40°C to 125°C operating range, and SOIC-16 wide-body package with reinforced creepage/clearance compliance.

Technical Context

The ISO7330FCDWR implements a dual-path capacitive isolation architecture: a high-frequency channel (100 kbps–25 Mbps) for fast data transmission and a low-frequency PWM-modulated channel (DC–100 kbps) for DC/low-speed signals. Its internal decision logic (DCL) automatically switches between paths based on input signal timing.

This architecture enables simultaneous support of both high-speed control signals and static logic states without external components. The device features TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max), 32 ns typical propagation delay (5 V), and failsafe output activation within 7 μs of input-side power loss.

Key Specifications

Pinout & Package

ISO7330FCDWR uses a wide-body SOIC-16 package (10.3 mm × 7.5 mm) with reinforced creepage (8 mm) and clearance (8 mm), meeting IEC 61010-1 and DIN VDE 0884-10 requirements for reinforced insulation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Compared with ISO7330CDWR and ADUM1300ARWZ, the ISO7330FCDWR uniquely combines 25 Mbps speed, 70 kV/μs CMTI, integrated noise filtering, and default-low fail-safe behavior in a single wide-body SOIC-16 package-making it optimal for high-reliability industrial motor drives and fieldbus nodes.

Availability

ISO7330FCDWR is available at Aetrix Electronics and suitable for industrial fieldbus nodes, motor control inverters, and servo amplifier designs requiring stable component supply, long-lifecycle assurance, and certified reinforced isolation.

Supply support for ISO7330FCDWR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability interface solutions for industrial, automotive, and communications markets.

The ISO733x family was engineered specifically for robust industrial isolation-emphasizing high CMTI, integrated noise immunity, extended temperature operation, and regulatory compliance for safety-critical control systems.

FAQ

What is the fail-safe behavior of the ISO7330FCDWR?

The ISO7330FCDWR features default-low fail-safe output: when input-side power (VCC1) is lost or the EN pin is driven low, all three outputs (OUTA–OUTC) transition to logic low within 7 μs. This behavior is intrinsic to the 'F' suffix variant and ensures safe deactivation of downstream circuitry like gate drivers or enable lines. The ISO7330FCDWR maintains this response across its full –40°C to +125°C operating range.

Does the ISO7330FCDWR support level translation between 3.3 V and 5 V domains?

Yes, the ISO7330FCDWR supports true bidirectional level translation: VCC1 can be 3.3 V while VCC2 is 5 V (or vice versa), with TTL-compatible inputs accepting 0–5.5 V and outputs delivering VOH ≥4.7 V (5 V supply) or VOH ≥3.0 V (3.3 V supply). This eliminates external level shifters in mixed-voltage systems such as PLC I/O modules interfacing 3.3 V microcontrollers with 5 V field devices.

What is the maximum data rate supported by the ISO7330FCDWR?

The ISO7330FCDWR supports a maximum signaling rate of 25 Mbps under recommended operating conditions (VCC = 5 V ±10%, TA = 25°C, CL = 15 pF). At 3.3 V, the rated maximum remains 25 Mbps, though propagation delay increases to 36 ns typical. This rate is validated for continuous operation with 50% duty-cycle square waves and meets jitter specifications up to 250 ps peak-to-peak at 25 Mbps.

How does the ISO7330FCDWR handle input noise in industrial environments?

The ISO7330FCDWR integrates a hardware noise filter that suppresses input transients shorter than 40 ns-effectively rejecting EFT bursts and coupled switching noise common in motor drives and factory automation. This filter operates transparently without software configuration or timing penalties, and is specified across the full –40°C to +125°C range. Unlike external RC filters, it does not degrade signal edge rates or add propagation delay.

What safety certifications apply to the ISO7330FCDWR?

The ISO7330FCDWR is certified to multiple international safety standards: 4242 VPK per DIN EN 61010-1 and DIN VDE 0884-10, 3000 VRMS per UL 1577 (1 minute), CSA Component Acceptance Notice 5A, IEC 60950-1, IEC 61010-1, and CQC GB4943.1-2011. These approvals confirm reinforced insulation suitability for functional safety applications up to 1000 VRMS working voltage in Pollution Degree 2 environments.