Texas Instruments ISO7230CDWG4

Overview

ISO7230CDWG4 from Texas Instruments is a triple-channel digital isolator with silicon dioxide (SiO₂) isolation barrier, 25-Mbps signaling rate, 4000-VPK isolation rating, and dual-supply operation (3.3 V or 5 V on input/output sides). It enables level translation between isolated domains in industrial fieldbus interfaces and servo control systems.

For engineers reviewing the ISO7230CDWG4 datasheet, ISO7230CDWG4 pinout, ISO7230CDWG4 application, or ISO7230CDWG4 equivalent, key selection criteria include channel configuration (3/0), CMTI (≥25 kV/μs), propagation delay (≤42 ns at 5 V), output enable functionality, and SOIC-16 package compatibility with industrial temperature range (–40°C to 125°C).

Technical Context

The ISO7230CDWG4 implements three unidirectional isolated channels with independent input and output supply domains (VCCI/GNDI and VCCO/GNDO), enabling galvanic separation and level shifting. Its capacitive SiO₂ barrier provides reinforced isolation certified to 4000-VPK (DIN V VDE V 0884-10) and 2500-VRMS (UL 1577).

It features an active-low enable pin (EN) controlling all three outputs simultaneously, supports TTL- and CMOS-compatible input thresholds (~1.5 V or VCC/2), and delivers low pulse-width distortion (≤2 ns max) and channel-to-channel output skew (≤1 ns max) for timing-critical serial communication.

Key Specifications

Pinout & Package

ISO7230CDWG4 uses a 16-pin SOIC (DW) package with 10.30 mm × 7.50 mm body size and creepage/clearance compliant with reinforced isolation standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISO7230CDWG4, ISO7230CDW offers identical performance in tube packaging for evaluation, while ADUM3210BRZ trades one channel and lower isolation for higher speed and different enable polarity-making it unsuitable as a drop-in replacement but viable for new dual-channel designs prioritizing bandwidth over safety margin.

Availability

ISO7230CDWG4 is available at Aetrix Electronics and suitable for industrial fieldbus interfaces, servo control systems, and data acquisition equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ISO7230CDWG4 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 company specializing in analog and embedded processing technologies, with leadership in isolation, power management, and signal chain solutions.

The ISO7230C series belongs to TI's high-speed digital isolator product line, designed specifically for industrial automation, motor control, and energy infrastructure applications demanding robust galvanic isolation and precise timing.

FAQ

What is the isolation voltage rating of the ISO7230CDWG4?

The ISO7230CDWG4 provides 4000-VPK isolation per DIN V VDE V 0884-10 and 2500-VRMS for 1 minute per UL 1577. This reinforced insulation rating is validated for continuous operation at rated working voltage and supports 25-year lifetime reliability in industrial environments as documented in TI application note SLLA197. The ISO7230CDWG4 meets CSA Component Acceptance Notice 5A and IEC 60950-1 end-equipment standards.

Does the ISO7230CDWG4 support mixed-voltage operation?

Yes, the ISO7230CDWG4 supports independent 3.3-V or 5-V supplies on input (VCCI) and output (VCCO) sides. Per datasheet section 7.3, VCCI and VCCO each operate from 3.15 V to 3.6 V (3.3-V mode) or 4.5 V to 5.5 V (5-V mode). This enables level translation between domains-for example, interfacing a 3.3-V microcontroller to a 5-V actuator driver-without external level shifters. The ISO7230CDWG4 maintains full 25-Mbps performance across all valid supply combinations.

What is the function of the EN pin on the ISO7230CDWG4?

The EN pin on the ISO7230CDWG4 is an active-low enable that controls all three output channels (OUTA, OUTB, OUTC) simultaneously. When EN is high, outputs reflect input states; when EN is low, all outputs enter high-impedance state. This feature enables power gating in low-power modes and bus arbitration in multi-master systems. The ISO7230CDWG4 specifies VIH(EN) ≥ 2 V and VIL(EN) ≤ 0.8 V, ensuring compatibility with both 3.3-V and 5-V logic families.

How does the ISO7230CDWG4 handle power loss on the input side?

The ISO7230CDWG4 incorporates a failsafe output mechanism: when VCCI drops below operational threshold (e.g., due to input-side power loss), outputs transition to a known logic-high state within 12 μs (t_fs). This behavior prevents undefined or floating states in downstream circuitry and supports safe shutdown sequences in industrial controllers. The ISO7230CDWG4 maintains this failsafe action regardless of VCCO status, as confirmed in Figure 10 and section 7.10 of the datasheet.

What are the thermal limitations of the ISO7230CDWG4 in SOIC-16 package?

The ISO7230CDWG4 in DW (SOIC-16) package has a junction-to-ambient thermal resistance (RθJA) of 168°C/W. At maximum power dissipation (220 mW, per section 7.9), junction temperature rise above ambient is ≤37°C-well within the 150°C absolute maximum TJ limit. Derating is required above 70°C ambient; full-rated operation is guaranteed from –40°C to 125°C ambient per recommended conditions. The ISO7230CDWG4 also specifies RθJC(bot) = 41.9°C/W for board-level thermal modeling.