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Texas Instruments ISO7140CCDBQ
- Part No.:
- ISO7140CCDBQ
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISO7140CCDBQ.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:564
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Product details
Overview
ISO7140CCDBQ from Texas Instruments is a quad-channel digital isolator with galvanic isolation up to 2500 VRMS (1 min, UL) and 4242 VPK (VDE), supporting 50 Mbps max data rate at 5 V and 40 Mbps at 3.3 V/2.7 V supplies. It features four unidirectional forward channels, TTL-compatible inputs, 5-V-tolerant inputs at lower supply voltages, and integrated noise filtering for industrial bus interfaces.
For engineers reviewing the ISO7140CCDBQ datasheet, ISO7140CCDBQ pinout, ISO7140CCDBQ application, or ISO7140CCDBQ equivalent, key selection criteria include channel directionality (all-forward), supply flexibility (2.7–5.5 V dual rails), CMTI rating (≥25 kV/µs), fail-safe output delay (≤9.5 µs), and SSOP-16 package compatibility with space-constrained industrial PCB layouts.
Technical Context
The ISO7140CCDBQ implements capacitive silicon dioxide (SiO₂) isolation between two independent power domains (VCCI/GND1 and VCCO/GND2), enabling signal transmission without ground-loop coupling. Each of its four isolated channels includes input buffer, noise-filtered logic, and push-pull output stage with enable control via single EN pin.
It operates across –40°C to +125°C ambient temperature, supports dual-supply operation (VCCI and VCCO independently set to 2.7 V, 3.3 V, or 5 V), and delivers low propagation delay (19 ns typical at 3.3 V) with tight channel-to-channel skew (≤4 ns for opposite-direction switching).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500 VRMS (UL 1577, 1 min) / 4242 VPK (DIN V VDE V 0884-10) |
| Max Data Rate | 50 Mbps at 5 V supply; 40 Mbps at 3.3 V or 2.7 V supply |
| Propagation Delay | 23 ns typical at 3.3 V - enables timing-critical serial interface synchronization |
| CMTI | ≥25 kV/µs typical - suppresses fast transients in motor drives and PLC backplanes |
| Supply Range | VCCI and VCCO independently support 2.7–5.5 V - allows mixed-voltage system interfacing |
| Input Tolerance | 5-V-tolerant inputs when powered from 2.7 V or 3.3 V - simplifies level-shifting design |
| Fail-Safe Delay | 9.5 µs max tfs - ensures deterministic output state during power loss or input failure |
Pinout & Package
ISO7140CCDBQ is housed in a 16-pin SSOP (DBQ) package measuring 4.90 mm × 3.90 mm, optimized for high-density industrial PCBs with creepage/clearance compliance per IEC 61010-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC, IND | Logic inputs (channels A–D) | TTL-compatible, 5-V-tolerant; drive isolated side-1 logic domain |
| OUTA, OUTB, OUTC, OUTD | Logic outputs (channels A–D) | Push-pull, rail-to-rail swing; referenced to VCCO/GND2 domain |
| VCCI, GND1 | Primary-side power | Supplies input buffers and side-1 logic; independent of output domain |
| VCCO, GND2 | Secondary-side power | Supplies output drivers and side-2 logic; enables galvanic separation |
| EN | Global output enable | Active-high; disables all four outputs to high-impedance when low |
| NC (pins 6, 11) | No-connect terminals | Floating pins with no internal connection - must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Quad forward-channel architecture | Four unidirectional signal paths - ideal for isolated UART, SPI, or parallel bus expansion |
| Integrated input noise filter | Rejects >11 ns glitches (tGR) - eliminates external RC filtering in noisy factory environments |
| Low-power operation | 1.0 mA/channel typical at 1 Mbps (3.3 V) - reduces thermal load in sealed enclosures |
| Wide temperature range | –40°C to +125°C operation - qualified for under-hood automotive and industrial control cabinets |
| Safety certifications | UL, VDE, CSA, CQC approvals - meets end-equipment requirements for IEC 61010-1 and IEC 60950-1 |
Applications
| Industrial Fieldbus Isolation | RS-485 Transceiver Isolation |
|---|---|
Use Scenario: Isolating PROFIBUS DP or Modbus RTU nodes in factory automation networks where ground potential differences exceed 10 V. IC Role / Device Role / Timing Role: Signal-level galvanic barrier between controller MCU and differential bus transceiver, preserving signal integrity at ≤12 Mbps. Use Value: Prevents ground-loop currents from corrupting communication or damaging UART peripherals, while maintaining <23 ns propagation delay for real-time response. |
Use Scenario: Protecting microcontroller UART lines driving isolated RS-485 transceivers in motor control cabinets exposed to EFT and surge events. IC Role / Device Role / Timing Role: Bidirectional data isolator (TX/RX paths) with fail-safe output behavior during power brownout on the bus side. Use Value: Enables robust 25 Mbps full-duplex operation with ≥25 kV/µs CMTI, eliminating need for optocoupler-based solutions with aging and speed limitations. |
| SPI Bus Level Shifting | PLC Digital I/O Isolation |
Use Scenario: Interfacing a 3.3-V ARM Cortex-M7 MCU to a 5-V isolated ADC or DAC over SPI in test equipment with strict EMC requirements. IC Role / Device Role / Timing Role: Four-channel forward isolator handling SCLK, MOSI, MISO, and CS signals with matched propagation delay across all paths. Use Value: Maintains SPI timing margins (tSU/tH) at 20 MHz clock rates due to ≤2 ns pulse width distortion and ≤4 ns channel skew. |
Use Scenario: Providing reinforced isolation for 24-V DC digital input modules in programmable logic controllers, where field-side transients exceed 4 kV. IC Role / Device Role / Timing Role: Input signal conditioner converting 24-V field signals (via external resistor network) into clean 3.3-V logic for FPGA or ASIC processing. Use Value: Achieves 2500 VRMS working insulation with 566 VPK VDE-rated working voltage - satisfies IEC 61000-4-5 Level 4 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7141CCDBQ | Three forward + one reverse channel; identical isolation rating, speed, and package | Required when bidirectional communication (e.g., I²C clock stretching) is needed on one channel | Select ISO7141CCDBQ only if reverse-direction capability is mandatory; otherwise ISO7140CCDBQ offers lower channel count overhead |
| ADUM1400ARWZ | 4-channel, 50 Mbps, 2500 VRMS; uses iCoupler® magnetic isolation; higher ICC (4.2 mA/channel @1 Mbps, 3.3 V) | Preferred in systems requiring tighter channel-to-channel skew (<1 ns) or higher CMTI (25 kV/µs min) | Choose ADUM1400ARWZ for ultra-low-skew timing-critical applications; ISO7140CCDBQ preferred for lower power and cost-sensitive industrial designs |
Compared with ISO7141CCDBQ, ISO7140CCDBQ eliminates reverse-channel circuitry to reduce quiescent current by ~20% at 1 Mbps and simplify layout; versus ADUM1400ARWZ, it trades slightly higher skew for significantly lower supply current and TI's long-term industrial qualification pedigree.
Availability
ISO7140CCDBQ is available at Aetrix Electronics and suitable for industrial fieldbus, isolated RS-485, and PLC digital I/O applications requiring stable component supply, long-lifecycle support, and certified safety compliance.
Supply support for ISO7140CCDBQ 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 focused on analog, embedded processing, and connectivity technologies, with decades of expertise in industrial-grade isolation solutions.
The ISO71xxCC family was designed specifically for cost-sensitive, high-reliability industrial isolation-emphasizing low power, robust CMTI, and regulatory certification readiness for factory automation and energy infrastructure.
FAQ
What is the maximum signaling rate supported by the ISO7140CCDBQ at different supply voltages?
The ISO7140CCDBQ supports up to 50 Mbps maximum data rate when both VCCI and VCCO are supplied at 5 V ±10%. At 3.3 V ±10%, the maximum rate drops to 40 Mbps, and at 2.7 V, it remains rated for 40 Mbps per the datasheet's recommended operating conditions. These limits reflect guaranteed timing performance across temperature and process variation - not theoretical bandwidth.
Does the ISO7140CCDBQ support reverse-direction signal transmission?
No, the ISO7140CCDBQ provides four unidirectional forward channels only (INA→OUTA, INB→OUTB, INC→OUTC, IND→OUTD). Reverse-direction capability is exclusive to the ISO7141CCDBQ variant. The ISO7140CCDBQ pinout and functional description confirm no reverse-path logic - all inputs reside on side-1 (VCCI/GND1), all outputs on side-2 (VCCO/GND2).
What safety certifications does the ISO7140CCDBQ hold?
The ISO7140CCDBQ is certified to UL 1577 (2500 VRMS, 1 minute), DIN V VDE V 0884-10 (4242 VPK, 566 VPK working voltage), CSA Component Acceptance Notice 5A, IEC 60950-1, IEC 61010-1, and GB 4943.1-2011 (CQC). These approvals cover reinforced insulation for end-equipment compliance in industrial and measurement applications.
How does the EN pin function on the ISO7140CCDBQ?
The EN pin on the ISO7140CCDBQ is a single active-high enable controlling all four output drivers. When EN is high or left floating (internal pull-up active), outputs respond normally to inputs. When EN is driven low, all four outputs enter high-impedance state - preserving isolation integrity while disabling downstream logic. This differs from ISO7131/ISO7141, which use EN1/EN2 for side-selective control.
Can the ISO7140CCDBQ operate with mismatched supply voltages on VCCI and VCCO?
Yes, the ISO7140CCDBQ supports independent VCCI and VCCO supplies ranging from 2.7 V to 5.5 V each. For example, VCCI may be 3.3 V (MCU side) while VCCO is 5 V (transceiver side), enabling seamless level shifting. Inputs remain 5-V-tolerant when VCCI is 2.7 V or 3.3 V - a key feature confirmed in Section 3 of the datasheet.
ISO7140CCDBQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 50Mbps
- Propagation Delay tpLH / tpHL (Max):
- 35ns, 35ns
- Pulse Width Distortion (Max):
- 3ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
ISO7140CCDBQ FAQ
1.How can I place an order for ISO7140CCDBQ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7140CCDBQ 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 ISO7140CCDBQ reliable?
The price and inventory of ISO7140CCDBQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7140CCDBQ is usually 5 days.
3.What payment methods are accepted for ISO7140CCDBQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7140CCDBQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7140CCDBQ?
ISO7140CCDBQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7140CCDBQ 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 ISO7140CCDBQ?
For technical support, including ISO7140CCDBQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7140CCDBQ requirements.
6.How does Aetrix verify that ISO7140CCDBQ is sourced from the original manufacturer or authorized distributors?
All ISO7140CCDBQ 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 ISO7140CCDBQ meets industry standards.
7.What is the process for return or replacement of ISO7140CCDBQ?
All ISO7140CCDBQ units undergo pre-shipment inspection (PSI). If there is an issue with ISO7140CCDBQ, 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 ISO7140CCDBQ part is unused and in its original packaging.
Return procedure for ISO7140CCDBQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7140CCDBQ Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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