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ISO15DW
Texas Instruments
ISO RS485/422 1MBPS 2.5KVRMS
1178 Pcs New Original In Stock
RS422, RS485 Digital Isolator 2500Vrms 3 Channel 1Mbps 25kV/µs CMTI 16-SOIC (0.295", 7.50mm Width)
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5.0 / 5.0
- (425 Ratings)
ISO15DW
Product Overview
1298800
DiGi Electronics Part Number
ISO15DW-DGManufacturer
Texas Instruments
ISO15DW
Description
ISO RS485/422 1MBPS 2.5KVRMSInventory
1178 Pcs New Original In Stock
RS422, RS485 Digital Isolator 2500Vrms 3 Channel 1Mbps 25kV/µs CMTI 16-SOIC (0.295", 7.50mm Width)
Quantity
Minimum 1
Minimum 1
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ISO15DW Technical Specifications
Category
Digital Isolators
Packaging
Tube
Series
-
Product Status
Last Time Buy
Technology
Capacitive Coupling
Type
RS422, RS485
Isolated Power
No
Number of Channels
3
Inputs - Side 1/Side 2
2/1
Channel Type
Unidirectional
Voltage - Isolation
2500Vrms
Common Mode Transient Immunity (Min)
25kV/µs
Data Rate
1Mbps
Propagation Delay tpLH / tpHL (Max)
-
Pulse Width Distortion (Max)
-
Rise / Fall Time (Typ)
-
Voltage - Supply
3.15V ~ 3.6V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.295", 7.50mm Width)
Supplier Device Package
16-SOIC
Base Product Number
ISO15
Datasheet & Documents
Datasheets
Download ISO15DW Product Specification (PDF)
HTML Datasheet
ISO15DW-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
296-23605-5-NDR
ISO15DW-DG
-296-23605-5-NDR
TEXTISISO15DW
296-23605-5
-ISO15DW-NDR
2156-ISO15DW
-296-23605-5
-296-23605-5-DG
-ISO15DWG4-NDR
-ISO15DWG4
Standard Package
40
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Leur politique de prix et leur service après-vente rapide me convainquent totalement.
de desembre 02, 2025
Die Zuverlässigkeit der Produkte hat mich voll überzeugt. Zudem ist der After-Sales-Support sehr kompetent.
de desembre 02, 2025
I appreciate their transparent communication and prompt follow-up after sales.
de desembre 02, 2025
Order processing is seamless, and delivery times are reliably short, saving me valuable time.
de desembre 02, 2025
They consistently offer competitive prices that suit remote professionals' budgets.
de desembre 02, 2025
Delivery was prompt, and their support team was very responsive to my needs.
de desembre 02, 2025
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de desembre 02, 2025
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Frequently Asked Questions (FAQ)
Can the ISO15DW be used to replace a MAX14949EWE+ in an existing RS485 industrial fieldbus design without modifying the power supply or PCB layout?
The ISO15DW is not a direct drop-in replacement for the MAX14949EWE+ due to key architectural differences. While both are 3-channel digital isolators rated for 2.5 kVrms isolation and support 1 Mbps data rates, the MAX14949EWE+ includes integrated isolated power via an internal DC-DC converter, whereas the ISO15DW requires external isolated power rails. If your current design relies on the MAX14949EWE+’s built-in power isolation, replacing it with the ISO15DW will necessitate adding an external isolated power supply (e.g., a push-pull or flyback converter), which impacts BOM cost, board space, and EMI profile. Additionally, pinout compatibility must be verified—though both come in 16-SOIC packages, pin functions differ significantly. Always validate signal directionality and ground partitioning before substitution.
What are the critical layout considerations when designing a PCB with the ISO15DW to maintain 25 kV/µs CMTI and prevent common-mode noise coupling in high-voltage industrial environments?
To preserve the ISO15DW’s 25 kV/µs common-mode transient immunity (CMTI), strict layout practices are essential. Maintain a minimum 8 mm creepage distance between isolated ground planes (GNDA and GNDB) on the PCB, and avoid routing high-speed or high-voltage traces across the isolation barrier. Use a solid ground plane under each side but ensure no copper bridges the isolation gap. Place bypass capacitors (100 nF ceramic) as close as possible to the VCC pins on both sides, and avoid vias near the isolation barrier that could reduce effective spacing. Also, route RS485/422 differential pairs symmetrically with controlled impedance (typically 120 Ω) and keep them away from noisy digital lines. Failure to follow these guidelines may result in latch-up, data corruption, or reduced effective CMTI under surge conditions.
Is the ISO15DW suitable for use in automotive applications requiring AEC-Q100 qualification, and what risks arise if used outside its specified operating temperature range?
The ISO15DW is not AEC-Q100 qualified and should not be used in safety-critical or under-hood automotive applications. While its operating temperature range of –40°C to +85°C overlaps with some automotive ambient conditions, it lacks the extended reliability testing, fault tolerance, and documentation (e.g., PPAP) required by automotive standards. Operating near or beyond the upper limit (85°C)—especially in enclosed modules with poor airflow—can accelerate aging of the capacitive isolation barrier, potentially degrading long-term isolation performance and CMTI. For automotive designs, consider TI’s ISO1042 or ISO1050, which are AEC-Q100 Grade 1 qualified. Using the ISO15DW in such environments introduces latent failure risks that may not manifest until field deployment.
How does the lack of integrated isolated power in the ISO15DW affect system-level design compared to alternatives like the MAX14948EWE+, and what mitigation strategies are recommended?
Unlike the MAX14948EWE+, which integrates a regulated isolated 5V or 3.3V output, the ISO15DW requires two separate, externally isolated power supplies—one for each side of the barrier. This increases component count, board area, and design complexity, especially in space-constrained applications. It also introduces potential ground loop issues if the isolated supplies are poorly regulated or share unintended return paths. To mitigate this, use a certified isolated DC-DC module (e.g., TI’s DCH01 series or RECOM RxxPxx series) with reinforced insulation matching or exceeding the ISO15DW’s 2.5 kVrms rating. Ensure both supplies meet the 3.15V–3.6V input range and provide sufficient transient response for your data rate. Always verify isolation coordination (e.g., double/reinforced insulation per IEC 61010) at the system level.
Given that the ISO15DW is in Last Time Buy status, what long-term supply chain and reliability risks should engineers consider before designing it into a new product?
Designing in the ISO15DW during its Last Time Buy phase poses significant long-term risks, including abrupt end-of-life discontinuation, allocation shortages, and price volatility. Once TI exhausts its final shipment, no additional stock will be produced, forcing costly last-time purchases or redesigns. Additionally, since the part uses capacitive coupling technology (which is mature but sensitive to moisture and contamination), long-term storage beyond its MSL 2 (1-year floor life) may require baking before reflow, adding manufacturing complexity. For new designs, strongly consider migrating to a currently supported alternative like the ISO15DWR (tape-and-reel version with identical specs) or a next-gen isolator such as the ISO1540 (with enhanced ESD protection and wider temp range). If you must proceed, secure a lifetime buy under contract and validate second-source compatibility with listed substitutes like MAX14945EWE+T early in the design cycle.
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ISO15DW CAD Models
Texas Instruments ISO15DW PCB symbols & footprints
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