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ISO7740DBQR
Texas Instruments
DGTL ISO 3000VRMS 4CH GP 16SSOP
1356 Pcs New Original In Stock
General Purpose Digital Isolator 3000Vrms 4 Channel 100Mbps 85kV/µs CMTI 16-SSOP (0.154", 3.90mm Width)
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5.0 / 5.0
- (310 Ratings)
ISO7740DBQR
Product Overview
1310546
DiGi Electronics Part Number
ISO7740DBQR-DGManufacturer
Texas Instruments
ISO7740DBQR
Description
DGTL ISO 3000VRMS 4CH GP 16SSOPInventory
1356 Pcs New Original In Stock
General Purpose Digital Isolator 3000Vrms 4 Channel 100Mbps 85kV/µs CMTI 16-SSOP (0.154", 3.90mm Width)
Quantity
Minimum 1
Minimum 1
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ISO7740DBQR Technical Specifications
Category
Digital Isolators
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
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
3000Vrms
Common Mode Transient Immunity (Min)
85kV/µs
Data Rate
100Mbps
Propagation Delay tpLH / tpHL (Max)
16ns, 16ns
Pulse Width Distortion (Max)
4.9ns
Rise / Fall Time (Typ)
2.4ns, 2.4ns
Voltage - Supply
2.25V ~ 5.5V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-SSOP (0.154", 3.90mm Width)
Supplier Device Package
16-SSOP
Base Product Number
ISO7740
Datasheet & Documents
Manufacturer Product Page
ISO7740DBQR Specifications
Design Resources
Digital Isolator Design Guide
HTML Datasheet
ISO7740DBQR-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
ISO7740DBQR-DG
296-48138-6
296-48138-2
296-48138-1
Standard Package
2,500
Alternative Parts
View DetailsPART 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
상담원의 응대가 정중하고 상세했어요. 구매 과정에서도 확신이 들었습니다.
de desembre 02, 2025
DiGi Electronics bietet hervorragende Preise und einen Kundenservice, der keine Wünsche offen lässt.
de desembre 02, 2025
Die Bestellung kam schnell und war gut geschützt verpackt.
de desembre 02, 2025
Speedy delivery and top quality make them stand out.
de desembre 02, 2025
Their proactive approach to customer service has helped us avoid potential issues before they arise.
de desembre 02, 2025
The design is modern and appealing, which adds to the pleasant shopping experience.
de desembre 02, 2025
Thanks to DiGi Electronics' competitive pricing, I can afford to try new tech gadgets often.
de desembre 02, 2025
The delivery was incredibly fast, I received my order within just a couple of days, which exceeded my expectations.
de desembre 02, 2025
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de desembre 02, 2025
The team at DiGi Electronics goes above and beyond to ensure all support needs are met.
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Frequently Asked Questions (FAQ)
Can the ISO7740DBQR replace an older optocoupler-based isolation solution like the HCPL-0721 in a 24V industrial input module without redesigning the power supply?
Yes, the ISO7740DBQR can replace the HCPL-0721 in many 24V digital input applications, but only if your system already provides isolated power to both sides—since the ISO7740DBQR does not include isolated power. Unlike optocouplers, it uses capacitive coupling and requires separate VCC1 and VCC2 supplies. Ensure your existing isolated DC-DC converter can support the ISO7740DBQR’s 2.25V–5.5V range on both sides. Also, verify signal timing compatibility: the ISO7740DBQR’s 16ns propagation delay is significantly faster than the HCPL-0721’s ~300ns, which may affect edge-sensitive logic or debounce circuits.
What are the key reliability risks when using the ISO7740DBQR in a high-vibration automotive environment near a motor controller, and how can they be mitigated?
The primary reliability risk for the ISO7740DBQR in high-vibration automotive settings is mechanical stress on the 16-SSOP package, which has limited robustness compared to QFN or larger SOIC packages. Additionally, while its 85kV/µs CMTI is excellent, sustained high-frequency noise from PWM-driven motors can still couple through parasitic paths. Mitigate this by mounting the ISO7740DBQR on a rigid PCB section, using conformal coating to reduce microphonic effects, and placing ground stitching vias near the isolator to suppress common-mode transients. Always follow TI’s layout guidelines for creepage and clearance to maintain 3000Vrms isolation under thermal cycling.
Is the ISO7740DBQR suitable for replacing the ISO7740FDBQR in a medical device requiring reinforced insulation, and what documentation or testing is needed?
The ISO7740DBQR and ISO7740FDBQR are functionally identical in performance and package, but the 'F' variant is specifically certified for reinforced insulation per IEC 60601-1 (3rd edition). If your medical device requires certified reinforced isolation, you cannot substitute the non-F version without re-certification. The ISO7740DBQR is only rated for basic insulation. Using it in place of the F variant would violate safety standards and introduce regulatory risk. Always confirm certification requirements with your compliance team—even minor part number differences can have major implications in medical designs.
How does the ISO7740DBQR perform in long-distance SPI communication (over 15cm traces) between a microcontroller and a remote ADC, and what layout practices prevent signal integrity issues?
The ISO7740DBQR supports 100Mbps data rates, making it suitable for high-speed SPI over 15cm traces, but signal integrity depends heavily on PCB layout. At these speeds, unmatched trace impedance, crosstalk, and ground bounce can corrupt data. Use controlled impedance routing (typically 50–70Ω single-ended), minimize parallel routing between channels, and place ground planes beneath the isolator. Since the ISO7740DBQR is unidirectional, ensure SCLK, MOSI, and CS lines are on the same side; MISO must be isolated in the opposite direction. Add series termination resistors (22–33Ω) near the driver side to dampen reflections, and avoid splitting ground planes under the isolation barrier.
Can I use the ISO7740DBQR in a 12V automotive battery monitoring system where one side operates at 14.4V (load dump conditions), and how do I protect the low-voltage logic side?
Yes, but only if the high-voltage side (14.4V during load dump) is powered through a regulated isolated supply that steps down to within the ISO7740DBQR’s 2.25V–5.5V input range. The isolator itself doesn’t handle high voltages directly—it only provides galvanic separation. You must use a robust isolated DC-DC converter (e.g., TI’s SN6505-based solution) to power the primary side. On the logic side, add TVS diodes and ferrite beads to suppress transients from the MCU. Never connect 12V/14.4V rails directly to any ISO7740DBQR pin, as this will destroy the device and compromise isolation integrity.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
ISO7740DBQR CAD Models
Texas Instruments ISO7740DBQR PCB symbols & footprints
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