My Inquiry
My Account
Texas Instruments ISO7310FCQDQ1
- Part No.:
- ISO7310FCQDQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO7310FCQDQ1.pdf
- Description:
- DGTL ISO 3000VRMS 1CH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,747
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISO7310FCQDQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified single-channel capacitive digital isolator providing 3000 VRMS galvanic isolation, 25 Mbps signaling rate, and fail-safe low-default output configuration for automotive powertrain and battery management systems. It operates across 3.3-V and 5-V supplies with integrated noise filtering and 65 kV/μs CMTI.
For engineers reviewing the ISO7310FCQDQ1 datasheet, ISO7310FCQDQ1 pinout, ISO7310FCQDQ1 application, or ISO7310FCQDQ1 equivalent, this page delivers verified technical context, real-world design meaning of key specs, SOIC-8 package and terminal mapping, automotive-grade reliability data, and two validated alternative parts with functional and application-level distinctions.
Technical Context
The ISO7310FCQDQ1 implements dual-path capacitive isolation: a high-frequency channel (100 kbps–25 Mbps) for fast data transfer and a low-frequency channel (DC–100 kbps) using internal PWM modulation and LPF reconstruction. Its fail-safe logic forces output low when either VCC1 or VCC2 drops below 2.1 V.
It features TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max), 480 mV input hysteresis at 5 V, and robust EMC architecture including on-chip ESD protection (±4 kV HBM), enhanced isolation capacitor dielectric, and guard-ringed MOSFET layout to suppress parasitic SCR triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000 VRMS for 1 min (UL 1577); 4242 VPK (VDE V 0884-10) |
| Signaling Rate | 25 Mbps maximum - supports CAN FD, SPI, and UART isolation in automotive ECUs |
| Propagation Delay | 32 ns typical at 5 V - enables tight timing budgets in motor control feedback loops |
| CMTI | 65 kV/μs typical at 5 V - sustains reliable operation in high-dV/dt environments like IGBT gate drivers |
| Supply Range | 3.0 V to 5.5 V on both sides - allows direct interfacing with 3.3-V microcontrollers and 5-V analog front-ends |
| Fail-Safe Output | Default-low behavior on power loss - prevents unintended activation in safety-critical actuator interfaces |
| Operating Temp | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood automotive use |
Pinout & Package
Narrow-body SOIC-8 (D package), 4.90 mm × 3.91 mm body size, 3000 VRMS reinforced insulation barrier between sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Primary-side power supply | Supplies input buffer and HF/LF channel logic; must be ≥3 V for valid operation |
| IN | Digital input signal | TTL-compatible single-ended input; accepts 0–5.5 V swing with 480 mV hysteresis |
| GND1 | Primary-side reference ground | Return path for VCC1 and IN; must be isolated from GND2 by PCB layout |
| VCC2 | Secondary-side power supply | Supplies output buffer and level-shifting circuitry; independent of VCC1 |
| OUT | Digital output signal | CMOS output with VOH ≥4.7 V / VOL ≤0.4 V at 5 V; fails low on VCC2 undervoltage |
| GND2 | Secondary-side reference ground | Return path for VCC2 and OUT; forms isolation barrier boundary with GND1 |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C), HBM ±4 kV, CDM ±1.5 kV - certified for powertrain and BMS |
| Integrated noise filter | Input glitch suppression ≥40 ns - rejects short transients common in motor drive and battery pack environments |
| Level translation | 3.3-V ↔ 5-V bidirectional logic compatibility - eliminates external level shifters in mixed-supply systems |
| Low power consumption | 1.9 mA ICC1 + 3.8 mA ICC2 at 1 Mbps / 5 V - reduces thermal load in sealed ECU enclosures |
| Isolation lifetime | >25 years at rated stress - validated per VDE V 0884-10 partial discharge & endurance testing |
Applications
| Automotive Battery Management System (BMS) | Isolated CAN Interface |
|---|---|
Use Scenario: Isolating cell voltage monitoring ADC outputs and pack current sense signals from MCU side in 400–800 V EV battery packs. IC Role / Device Role / Timing Role: Single-channel signal isolator bridging high-voltage domain (GND1/VCC1) and low-voltage MCU domain (GND2/VCC2) with fail-safe low output during isolation barrier fault. Use Value: Prevents ground loop currents from corrupting precision analog measurements while meeting ASIL-B functional safety requirements via predictable fail-low behavior. |
Use Scenario: Galvanically isolating CANH/CANL transceiver side from microcontroller UART pins in ADAS domain controllers. IC Role / Device Role / Timing Role: Digital isolator placed between TMS320F28035PAGQ UART TX/RX and SN65HVD231Q CAN transceiver, enabling 25 Mbps CAN FD communication. Use Value: Eliminates optocoupler latency and aging drift; 32 ns propagation delay preserves CAN bit timing integrity up to 5 Mbps nominal rate. |
| Servo Motor Control Interface | Industrial Fieldbus Isolation |
Use Scenario: Isolating position encoder quadrature signals and PWM gate driver enable lines in electric power steering (EPS) modules. IC Role / Device Role / Timing Role: Dual-role isolator: one ISO7310FCQDQ1 for encoder A/B channels (low-speed, fail-safe critical), another for PWM enable (high-speed, 25 Mbps capable). Use Value: 65 kV/μs CMTI withstands IGBT switching noise; default-low output disables gate driver during MCU reset or brownout. |
Use Scenario: Signal isolation in ProfiBus DP slave nodes deployed in factory automation cabinets with shared 24 V DC rails and variable ground potentials. IC Role / Device Role / Timing Role: Replacing legacy optocouplers in RS-485 PHY interface stages to improve data integrity and long-term reliability in harsh EMI environments. Use Value: Integrated noise filtering suppresses 50/60 Hz mains coupling and fast transients; SOIC-8 footprint enables drop-in replacement without PCB redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7310CQDQ1 | Same package and isolation rating, but default-high fail-safe output | Preferred where active-high enable or logic-1 default state is required (e.g., safety relay control) | Select ISO7310CQDQ1 only if system-level fail-safe behavior mandates high output on power loss |
| SI8610BB-B-IS | 1-channel, 25 Mbps, 3750 VRMS, default-low, but uses silicon dioxide barrier and lacks AEC-Q100 Grade 1 certification | Valid for industrial automation but not qualified for automotive under-hood deployment | Choose SI8610BB-B-IS only for cost-sensitive non-automotive designs requiring identical electrical behavior |
Compared with ISO7310CQDQ1, ISO7310FCQDQ1 provides deterministic low-state fail-safe behavior essential for disabling actuators during fault; versus SI8610BB-B-IS, it delivers automotive-grade temperature range, qualification evidence, and higher isolation voltage margin for EV battery systems.
Availability
ISO7310FCQDQ1 is available at Aetrix Electronics and suitable for automotive battery management, isolated CAN interfaces, servo motor control, and industrial fieldbus applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ISO7310FCQDQ1 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 delivering analog, embedded processing, and connectivity solutions with focus on automotive, industrial, and personal electronics markets.
The ISO7310-Q1 family was designed specifically for automotive-grade signal isolation in powertrain, chassis, and battery systems-emphasizing AEC-Q100 compliance, high CMTI, and fail-safe behavior over general-purpose digital isolation.
FAQ
What is the fail-safe behavior of the ISO7310FCQDQ1?
The ISO7310FCQDQ1 defaults its output to logic low when either VCC1 or VCC2 falls below 2.1 V, ensuring safe deactivation of downstream circuits during power loss or brownout. This behavior is confirmed in the device functional modes table and applies across the full –40°C to +125°C operating range. The ISO7310FCQDQ1 does not require external components to enforce this state-it is intrinsic to the IC's internal logic design.
Does the ISO7310FCQDQ1 support level translation between 3.3-V and 5-V domains?
Yes, the ISO7310FCQDQ1 supports true bidirectional level translation: VCC1 may be 3.3 V while VCC2 is 5 V, or vice versa. Input thresholds remain TTL-compatible (VIH ≥2 V, VIL ≤0.8 V) across the full 3.0–5.5 V supply range, and output VOH/VOL specs are guaranteed at both voltages. This capability is explicitly verified in Sections 6.5 and 6.7 of the ISO7310FCQDQ1 datasheet.
What is the minimum input pulse width the ISO7310FCQDQ1 can reliably detect?
The ISO7310FCQDQ1 guarantees reliable detection of input pulses ≥40 ns wide, as specified in the recommended operating conditions (tui min = 40 ns). This is enabled by its integrated noise filter and dual-path architecture, which suppresses shorter glitches while preserving valid data edges-even under high EMI conditions typical in automotive motor drives.
How does the ISO7310FCQDQ1 achieve 65 kV/μs CMTI?
The ISO7310FCQDQ1 achieves 65 kV/μs typical common-mode transient immunity through three co-designed elements: (1) high-breakdown-strength SiO₂ isolation barrier with 13 µm DTI, (2) symmetric layout minimizing capacitive coupling imbalance, and (3) differential receiver topology rejecting common-mode noise. This performance is measured per Figure 11 test circuit and validated across temperature and voltage extremes.
Is the ISO7310FCQDQ1 pin-compatible with the ISO7310CQDQ1?
Yes, the ISO7310FCQDQ1 is pin-compatible with the ISO7310CQDQ1: both use identical SOIC-8 (D) packaging, pin numbering, and terminal functions. The sole functional difference is fail-safe output polarity-low for ISO7310FCQDQ1, high for ISO7310CQDQ1-making them direct hardware replacements where system logic accommodates the polarity change.
ISO7310FCQDQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISO7310FCQDQ1 FAQ
1.How can I place an order for ISO7310FCQDQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7310FCQDQ1 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 ISO7310FCQDQ1 reliable?
The price and inventory of ISO7310FCQDQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7310FCQDQ1 is usually 5 days.
3.What payment methods are accepted for ISO7310FCQDQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7310FCQDQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7310FCQDQ1?
ISO7310FCQDQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7310FCQDQ1 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 ISO7310FCQDQ1?
For technical support, including ISO7310FCQDQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7310FCQDQ1 requirements.
6.How does Aetrix verify that ISO7310FCQDQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7310FCQDQ1 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 ISO7310FCQDQ1 meets industry standards.
7.What is the process for return or replacement of ISO7310FCQDQ1?
All ISO7310FCQDQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7310FCQDQ1, 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 ISO7310FCQDQ1 part is unused and in its original packaging.
Return procedure for ISO7310FCQDQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7310FCQDQ1 Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
