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ISO7342CDW
Texas Instruments
DGTL ISO 3000VRMS 4CH GP 16SOIC
58815 Pcs New Original In Stock
General Purpose Digital Isolator 3000Vrms 4 Channel 25Mbps 25kV/µs CMTI 16-SOIC (0.295", 7.50mm Width)
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ISO7342CDW
Product Overview
1282369
DiGi Electronics Part Number
ISO7342CDW-DGManufacturer
Texas Instruments
ISO7342CDW
Description
DGTL ISO 3000VRMS 4CH GP 16SOICInventory
58815 Pcs New Original In Stock
General Purpose Digital Isolator 3000Vrms 4 Channel 25Mbps 25kV/µs CMTI 16-SOIC (0.295", 7.50mm Width)
Quantity
Minimum 1
Minimum 1
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ISO7342CDW Technical Specifications
Category
Digital Isolators
Packaging
Tube
Series
-
Product Status
Active
Technology
Capacitive Coupling
Type
General Purpose
Isolated Power
No
Number of Channels
4
Inputs - Side 1/Side 2
2/2
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)
2.1ns, 1.7ns
Voltage - Supply
3V ~ 5.5V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.295", 7.50mm Width)
Supplier Device Package
16-SOIC
Base Product Number
ISO7342
Datasheet & Documents
Manufacturer Product Page
ISO7342CDW Specifications
HTML Datasheet
ISO7342CDW-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-38515-5
Standard Package
40
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
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Frequently Asked Questions (FAQ)
How can I ensure reliable signal integrity when replacing the ADuM1401 with the ISO7342CDW in a high-noise industrial control system?
When replacing the ADuM1401 with the ISO7342CDW, verify that the 25kV/µs common-mode transient immunity (CMTI) of the ISO7342CDW meets or exceeds your system's noise environment, especially in motor drives or PLC backplanes. While the ISO7342CDW offers comparable CMTI to the ADuM1401, ensure PCB layout maintains adequate creepage and clearance (≥6.2mm per IEC 60664-1) to preserve the 3000Vrms isolation rating. Additionally, match the unidirectional channel configuration and confirm that the 25Mbps data rate supports your fieldbus protocol timing. Use ground planes strategically to minimize coupling and add series termination resistors if signal reflections are observed at higher speeds.
What design risks arise when using the ISO7342CDW near its maximum junction temperature of 125°C in a sealed enclosure?
Operating the ISO7342CDW near 125°C in a sealed enclosure increases long-term reliability risks due to thermal stress on the capacitive isolation barrier and-package material. Derate the isolation lifetime using the Arrhenius model—every 10°C rise can halve insulation durability. To mitigate, calculate junction temperature with board-level thermal resistance (typically 119°C/W for SOIC), ensure external heat sources are minimized, and consider adding thermal vias under the exposed pad (if applicable). Monitor surface temperature during burn-in testing, and verify signal integrity at temperature extremes due to potential propagation delay drift.
Can the ISO7342CDW safely isolate signals between 3.3V and 5V logic domains without level shifting?
Yes, the ISO7342CDW supports mixed 3V to 5.5V supply operation, allowing direct integration between 3.3V microcontrollers and 5V sensors or field-side circuits. However, ensure both VCC1 and VCC2 remain within nominal range and avoid sequencing issues—powering one side before the other can leave inputs floating, leading to unintended channel switching. Add pull-up/down resistors (10kΩ) on unused inputs tied to their respective logic rails. Also, confirm that input high thresholds are compatible: at 3.3V, VIH is ~2.0V, making it safe for 5V-tolerant inputs, but always validate with actual waveforms under load.
How does pulse width distortion in the ISO7342CDW affect timing margins in isolated SPI or I2C interfaces?
The ISO7342CDW specifies a maximum pulse width distortion (PWD) of 4ns, which is negligible for I2C (typically kHz–400kHz) but must be accounted for in high-speed SPI systems approaching 25Mbps. At 25MHz clock, a 20ns half-period leaves little margin; cumulative PWD with propagation delay skew (tpLH vs tpHL up to 58ns) can compress duty cycle integrity. For SPI isolation, use symmetric routing, limit trace lengths to minimize additional jitter, and validate timing budgets with worst-case propagation delays. Avoid daisy-chaining multiple isolators without recalculating setup/hold margins at the receiver.
What are the key reliability differences between the ISO7342CDW and Si8642 when designing for 20-year industrial equipment life?
The ISO7342CDW (capacitive coupling) and Si8642 (CMOS-based capacitive isolation) both offer 3000Vrms isolation, but long-term reliability differs under thermal cycling and partial discharge stress. The ISO7342CDW’s oxide-based dielectric in TI’s process has demonstrated robustness in HV-TM and THB testing, while the Si8642 may exhibit different wear-out mechanisms. For 20-year life, prioritize the ISO7342CDW’s proven field history in harsh environments and its guaranteed 25kV/µs CMTI across temperature. Additionally, ISO7342CDW’s MSL2 rating requires timely assembly control; store in dry cabinets and reflow within 1 year of seal opening to avoid package cracking or delamination risks.
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ISO7342CDW CAD Models
Texas Instruments ISO7342CDW PCB symbols & footprints
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