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Texas Instruments ISO7310CD
- Part No.:
- ISO7310CD
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO7310CD.pdf
- Description:
- DGTL ISO 3000VRMS 1CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
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Product details
Overview
ISO7310CD from Texas Instruments is a single-channel, capacitive digital isolator with 3000 VRMS galvanic isolation, 25 Mbps signaling rate, and integrated input noise filtering-designed for signal-level isolation between microcontroller I/O and industrial fieldbus transceivers operating across 3.3 V or 5 V domains.
For engineers reviewing the ISO7310CD datasheet, ISO7310CD pinout, ISO7310CD application, or ISO7310CD equivalent, key selection criteria include CMTI (65 kV/μs typical at 5 V), fail-safe output delay (7.5 μs), propagation delay (32 ns typical at 5 V), and SOIC-8 narrow-body package compatibility with legacy optocoupler footprints in servo control and motor drive interfaces.
Technical Context
The ISO7310CD implements dual-path capacitive isolation: a high-frequency channel (100 kbps–25 Mbps) for fast data transmission and a low-frequency/pulse-width modulated channel for DC–100 kbps signals, enabling seamless DC-to-25 Mbps operation without external components. Its silicon dioxide (SiO₂) barrier provides reinforced insulation certified to UL 1577 (3000 VRMS), VDE 0884-10 (4242 VPK), and CQC GB4943.1-2011.
It features TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max), failsafe output behavior on input-side power loss, and independent 3.3 V/5 V supply domains (VCC1/VCC2) supporting level translation. The device achieves system-level ESD/EFT/surge immunity via chip-level layout optimization-not external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000 VRMS (1 min, UL 1577); 4242 VPK (DIN V VDE V 0884-10) - enables reinforced insulation in industrial safety-critical circuits. |
| Signaling Rate | 25 Mbps maximum - supports high-speed serial links like RS-485 transceiver control in ProfiBus and DeviceNet™. |
| Propagation Delay | 32 ns typical (5 V supplies) - ensures timing-critical feedback loops in motor control remain within 100 ns budget. |
| CMTI | 65 kV/μs typical (5 V) - rejects fast common-mode transients induced by IGBT switching in inverters. |
| Supply Current | 1.9 mA at 1 Mbps / 3.8 mA at 25 Mbps (5 V) - reduces thermal load in space-constrained battery-powered gate drivers. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive powertrain modules and industrial PLC backplanes. |
| Input Noise Filter | Integrated glitch suppression ≥40 ns - eliminates false triggering from EFT bursts in factory-floor environments. |
Pinout & Package
Narrow-body SOIC-8 (D package), 4.90 mm × 3.91 mm body size, 1.27 mm pitch, creepage/clearance ≥4 mm, CTI ≥400 V.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Primary-side power supply | Supplies input buffer and logic; accepts 3–5.5 V; decoupling required near pin 1/3. |
| IN | Digital input signal | TTL-compatible; VIH ≥2 V, VIL ≤0.8 V; internal hysteresis (480 mV at 5 V) suppresses noise. |
| GND1 | Primary-side reference ground | Must be isolated from GND2; forms return path for VCC1 and IN current. |
| GND2 | Secondary-side reference ground | Isolated return for VCC2 and OUT; critical for maintaining >4 mm creepage on PCB. |
| OUT | Digital output signal | CMOS output; VOH ≥4.7 V (5 V), VOL ≤0.4 V (5 V, 4 mA); drives 15 pF loads directly. |
| VCC2 | Secondary-side power supply | Supplies output buffer; independent 3–5.5 V domain enables level translation between 3.3 V MCU and 5 V bus. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive SiO₂ Isolation Barrier | Guarantees >25-year lifetime at rated voltage; eliminates LED aging and CTR degradation of optocouplers. |
| Fail-Safe Output Delay | 7.5 μs response to VCC1 loss - holds last valid state long enough for host MCU to detect fault and initiate safe shutdown. |
| Robust EMC Architecture | System-level ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and surge (IEC 61000-4-5) compliance without external filters. |
| Level Translation | 3.3 V ↔ 5 V bidirectional interface - simplifies interconnection between modern low-voltage MCUs and legacy 5 V industrial buses. |
| Integrated Input Noise Filter | Rejects sub-40 ns transients - eliminates need for external RC snubbers in noisy motor control cabinets. |
Applications
| Industrial FieldBus Interface | Servo Motor Control |
|---|---|
Use Scenario: Isolating UART or SPI lines between a 3.3 V ARM Cortex-M controller and an RS-485 transceiver in a PLC rack exposed to 2 kV EFT. IC Role / Device Role / Timing Role: Signal-level galvanic isolator providing bidirectional data integrity across ground domains while preserving 25 Mbps timing margins. Use Value: Eliminates ground-loop-induced communication errors and prevents transceiver latch-up during surge events. |
Use Scenario: Isolating PWM enable and fault feedback signals between a 5 V FPGA motion controller and IGBT gate driver in a CNC spindle drive. IC Role / Device Role / Timing Role: High-CMTI isolator ensuring accurate 20 kHz PWM edge timing despite 50 kV/μs dv/dt on motor phases. Use Value: Maintains <32 ns propagation delay variation across temperature, preventing shoot-through in half-bridge topologies. |
| Programmable Power Supply | Battery Management System |
Use Scenario: Isolating analog voltage sense and digital enable signals between primary-side AC/DC controller and secondary-side DC-DC regulation in medical-grade lab PSUs. IC Role / Device Role / Timing Role: Reinforced-isolation barrier meeting 400 VRMS working voltage and 6000 VPK surge requirements per IEC 61010-1. Use Value: Achieves double-insulation certification without external creepage extenders or potting. |
Use Scenario: Isolating cell voltage monitoring ADC interface and pack contactor control signals in EV battery packs operating at –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Wide-temperature isolator enabling reliable CAN bus communication and precharge sequencing across 1000 V battery stacks. Use Value: Supports 125°C junction rating for under-battery-pack mounting while maintaining 3000 VRMS isolation integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM1100ARZ | 1-channel, 1 Mbps max rate, 100 kV/μs CMTI, SOIC-8, 2.7–5.5 V supplies | Limited to low-speed control signals (e.g., enable/disable); insufficient for 25 Mbps fieldbus clocking | Select when cost sensitivity outweighs speed needs and CMTI >65 kV/μs is unnecessary. |
| SI8610BB-B-IS | 1-channel, 150 Mbps max rate, 35 kV/μs CMTI, SOIC-8, 2.5–5.5 V supplies | Higher speed but lower CMTI; lacks integrated input noise filter and failsafe delay | Prefer for ultra-high-speed links where transient immunity is managed externally via PCB layout. |
Compared with ADUM1100ARZ and SI8610BB-B-IS, the ISO7310CD uniquely balances 25 Mbps throughput, 65 kV/μs CMTI, integrated noise filtering, and failsafe behavior-making it optimal for industrial fieldbus and motor control where reliability trumps raw bandwidth.
Availability
ISO7310CD is available at Aetrix Electronics and suitable for industrial fieldbus interfaces, servo motor controllers, and programmable power supplies requiring stable component supply, long-term lifecycle support, and full regulatory documentation traceability.
Supply support for ISO7310CD 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 connectivity technologies, with decades of expertise in high-reliability isolation solutions.
The ISO7310x family was engineered specifically for robust industrial automation applications-delivering certified galvanic isolation, low-power operation, and EMC resilience in harsh electromagnetic environments.
FAQ
What isolation certifications does the ISO7310CD hold?
The ISO7310CD is certified to UL 1577 (3000 VRMS, 1 minute), DIN V VDE V 0884-10 (4242 VPK), CSA Component Acceptance Notice 5A, and CQC GB4943.1-2011. It meets reinforced insulation requirements per IEC 61010-1 and supports 400 VRMS working voltage. All certifications apply directly to the ISO7310CD part number as shipped.
Does the ISO7310CD support level translation between 3.3 V and 5 V systems?
Yes, the ISO7310CD supports true bidirectional level translation: VCC1 may operate at 3.3 V while VCC2 operates at 5 V (or vice versa), with TTL-compatible input thresholds and CMOS output drive capability on both sides. This allows direct interfacing of 3.3 V microcontrollers to 5 V industrial buses without external level shifters.
What is the purpose of the integrated input noise filter in the ISO7310CD?
The ISO7310CD's integrated input noise filter suppresses short-duration transients (≥40 ns pulse width) at the IN pin, preventing false triggering in electrically noisy environments such as motor drives and factory automation. This eliminates the need for external RC filters or Schmitt-trigger buffers in most applications.
How does the fail-safe output behavior work in the ISO7310CD?
When VCC1 is lost, the ISO7310CD holds its last valid output state for 7.5 μs (typical) before transitioning to a known default state-either high or low depending on variant (ISO7310C = high-default). This gives the host controller time to detect the fault and execute a controlled shutdown sequence, enhancing system safety.
Can the ISO7310CD replace traditional optocouplers in existing designs?
Yes-the ISO7310CD uses a narrow-body SOIC-8 package identical to industry-standard optocouplers (e.g., PC817 footprint), supports the same 3–5.5 V supply range, and offers superior performance: 25 Mbps vs. ~1 Mbps, 65 kV/μs CMTI vs. ~15 kV/μs, and no LED aging. Pin-compatible replacement is validated for fieldbus, servo, and power supply applications.
ISO7310CD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 1
- Inputs - Side 1/Side 2:
- 1/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 58ns, 58ns
- Pulse Width Distortion (Max):
- 4ns
- Rise / Fall Time (Typ):
- 2.5ns, 2ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISO7310CD FAQ
1.How can I place an order for ISO7310CD through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7310CD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISO7310CD reliable?
The price and inventory of ISO7310CD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7310CD is usually 5 days.
3.What payment methods are accepted for ISO7310CD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7310CD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7310CD?
ISO7310CD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7310CD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISO7310CD?
For technical support, including ISO7310CD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7310CD requirements.
6.How does Aetrix verify that ISO7310CD is sourced from the original manufacturer or authorized distributors?
All ISO7310CD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISO7310CD meets industry standards.
7.What is the process for return or replacement of ISO7310CD?
All ISO7310CD units undergo pre-shipment inspection (PSI). If there is an issue with ISO7310CD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISO7310CD part is unused and in its original packaging.
Return procedure for ISO7310CD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7310CD Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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