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Home > Products > Integrated Circuits (ICs) > Logic > Translators, Level Shifters

Analog Devices Inc./Maxim Integrated MAX14842ATE+T

Name: MAX14842ATE+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX14842ATE+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX14842ATE+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Translators, Level Shifters

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Datasheet:: MAX14842ATE+T.pdf

Description:: IC TRANSLTR BIDIRECTIONAL 16TQFN

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Inventory:2,500

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Product details

Overview

MAX14842ATE+T from Maxim Integrated is a 6-channel digital ground-level translator enabling signal isolation between two logic domains with ground potential differences up to 72V. It integrates four unidirectional (30Mbps) and two bidirectional (2Mbps, I²C-compatible, open-drain) channels, powered by independent 3.0V–5.5V supplies (VDDA/GNDA and VDDB/GNDB), and operates across –40°C to +125°C for automotive battery management and isolated communication interfaces.

For engineers reviewing the MAX14842ATE+T datasheet, MAX14842ATE+T pinout, MAX14842ATE+T application, or MAX14842ATE+T equivalent, this page delivers verified channel architecture, ground-isolation limits, I²C clock-stretching support, undervoltage lockout behavior, and TQFN-16 package implementation details required for high-reliability isolated bus design.

Technical Context

The MAX14842ATE+T implements dual-supply, galvanically isolated level translation without optocouplers or transformers-using BiCMOS process to sustain 72V common-mode ground offset while maintaining signal integrity. Its six independent channels are partitioned into push-pull unidirectional paths (INA1→OUTB1, INA2→OUTB2, INB1→OUTA1, INB2→OUTA2) and open-drain bidirectional pairs (I/OA1↔I/OB1, I/OA2↔I/OB2), each referenced strictly to its own ground (GNDA or GNDB).

Undervoltage lockout (UVLO) monitors both VDDA and VDDB independently, forcing unidirectional outputs high and bidirectional outputs into high-Z state during supply transients. Bidirectional operation relies on differential input threshold (DVTOL ≥ 50mV) to prevent latching, and supports I²C clock stretching via guaranteed timing margins under 2Mbps with RPUA/RPUB pullups.

Key Specifications

Parameter	Value and Actual Design Meaning
Ground Offset Range	0V to +72V (GNDB ≥ GNDA); enables safe interfacing between battery packs and MCU domains with large potential differences.
Unidirectional Data Rate	Up to 30Mbps per channel; supports high-speed SPI/MICROWIRE signals across isolated domains without external buffers.
Bidirectional Data Rate	Up to 2Mbps per I²C pair; meets SMBus timing requirements and supports clock stretching for slave arbitration.
Supply Voltage Range	VDDA/VGNDA = 3.0V–5.5V, VDDB/VGNDB = 3.0V–5.5V; allows mixed-voltage systems (e.g., 3.3V MCU ↔ 5V peripheral) with independent rail control.
Operating Temperature	–40°C to +125°C; qualified for under-hood automotive applications and industrial battery monitoring systems.
Package	16-pin TQFN (4mm × 4mm, exposed pad); provides low thermal resistance (θ_JA = 40°C/W) for sustained operation in compact, thermally constrained layouts.
Propagation Delay	20–100ns depending on direction and load; specified at 15pF/1kΩ–1.6kΩ, ensuring deterministic timing for real-time control loops.

Pinout & Package

MAX14842ATE+T is housed in a 16-pin, 4mm × 4mm TQFN-EP package with exposed pad connected to GNDA. Pin functions are electrically isolated per side: Side A (GNDA-referenced) includes inputs (INA1, INA2), outputs (OUTA1, OUTA2), and bidirectional I/Os (I/OA1, I/OA2); Side B (GNDB-referenced) includes complementary signals (INB1, INB2, OUTB1, OUTB2, I/OB1, I/OB2), plus dedicated supplies (VDDA, VDDB) and grounds (GNDA, GNDB).

Pin/Terminal	Circuit Role	Design Meaning
1, 16 (INA2, INA1)	Side A logic inputs	Translate to OUTB2 and OUTB1 respectively; accept 0.7×VDDA logic-high, tolerate –0.3V to VDDA+0.3V.
2, 3 (OUTA1, OUTA2)	Side A push-pull outputs	Drive OUTA1/OUTA2 high/low actively; sink 4mA @ VOL ≤ 0.8V, source 4mA @ VOH ≥ VDDA–0.4V.
4, 5 (I/OA1, I/OA2)	Side A bidirectional open-drain I/O	Interface with I/OB1/I/OB2; require external pullups; support I²C clock stretching and hot-swap.
6 (GNDA)	Side A ground reference	Mandatory connection point for VDDA bypass cap and exposed pad; must be ≤ GNDB per absolute max rating.
7 (GNDB)	Side B ground reference	Mandatory connection for VDDB bypass cap; defines 0V reference for Side B; must be ≥ GNDA.
8, 9 (I/OB2, I/OB1)	Side B bidirectional open-drain I/O	Match I/OA2/I/OA1; sink up to 30mA; enable full-duplex I²C across ground domains.
10, 11 (INB2, INB1)	Side B logic inputs	Translate to OUTA2 and OUTA1; referenced to GNDB; VIH = 0.7×VDDB.
12, 13 (OUTB2, OUTB1)	Side B push-pull outputs	Drive loads on Side B; VOL ≤ 0.8V @ 4mA sink, VOH ≥ VDDB–0.4V @ 4mA source.
14 (VDDB)	Side B supply	Bypass to GNDB with 0.1µF ceramic capacitor; powers all Side B circuitry including bidirectional drivers.
15 (VDDA)	Side A supply	Bypass to GNDA with 0.1µF ceramic capacitor; powers Side A inputs, outputs, and bidirectional logic.
EP (Exposed Pad)	Thermal & electrical ground	Must be soldered to GNDA plane; reduces θ_JA by ~30%, improves power dissipation margin up to 2000mW at TA=70°C.

Key Features

Feature	Design Value
72V ground offset tolerance	Enables direct interface between 12V/48V battery stacks and 3.3V microcontrollers without external isolation components.
I²C clock stretching support	Guaranteed timing margins on bidirectional channels allow compliant slave devices to hold SCL low without data corruption.
Independent UVLO on both supplies	Prevents metastable output states during asymmetric power-up/down sequences-critical for fail-safe automotive subsystems.
Push-pull unidirectional outputs	Eliminates need for external pullups on four high-speed channels, reducing BOM count and PCB area in space-constrained modules.
Differential input threshold (≥50mV)	Prevents bidirectional latch-up by ensuring VOL > VIL + 50mV, enabling robust operation under voltage transients and noise.

Applications

Battery Management Systems	Automotive Body Control Modules
Use Scenario: Isolating cell-monitoring ICs (e.g., MAX17852) on high-voltage battery packs from low-voltage MCU domains. IC Role / Device Role / Timing Role: Ground-level translator bridging GNDA (pack ground) and GNDB (MCU ground) with up to 72V offset; handles 30Mbps daisy-chain commands and status reads. Use Value: Eliminates optocouplers and isolated DC/DC converters, reducing cost and board area while maintaining ASIL-B functional safety compliance.	Use Scenario: Interfacing LIN or CAN transceivers with microcontrollers across different chassis ground zones (e.g., front vs. rear modules). IC Role / Device Role / Timing Role: Level-shifting and ground-isolating I²C configuration lines between domain controllers operating at different ground potentials. Use Value: Prevents ground-loop currents and EMI-induced errors in multi-node vehicle networks, supporting ISO 11898-2 and LIN 2.2A standards.
Industrial Power-Over-Ethernet (PoE)	Medical Patient Monitoring Equipment
Use Scenario: Translating control signals between PoE PSE controller (48V domain) and isolated MCU (3.3V domain) in IEEE 802.3af/at PD designs. IC Role / Device Role / Timing Role: Unidirectional command path (PSE → MCU) and bidirectional I²C (MCU ↔ PD controller) across 50V+ ground offsets. Use Value: Meets IEC 62368-1 creepage/clearance requirements without reinforced insulation, simplifying certification.	Use Scenario: Isolating ECG/EEG analog front-end sensors (floating patient ground) from hospital-grade AC-powered processing units. IC Role / Device Role / Timing Role: Bidirectional I²C interface for sensor configuration and calibration data exchange across medically mandated 1500Vrms isolation barriers. Use Value: Achieves IEC 60601-1 2×MOPP isolation compliance using only one component, avoiding complex transformer-based solutions.

Battery Management Systems

Automotive Body Control Modules

Use Scenario: Isolating cell-monitoring ICs (e.g., MAX17852) on high-voltage battery packs from low-voltage MCU domains.

IC Role / Device Role / Timing Role: Ground-level translator bridging GNDA (pack ground) and GNDB (MCU ground) with up to 72V offset; handles 30Mbps daisy-chain commands and status reads.

Use Value: Eliminates optocouplers and isolated DC/DC converters, reducing cost and board area while maintaining ASIL-B functional safety compliance.

Use Scenario: Interfacing LIN or CAN transceivers with microcontrollers across different chassis ground zones (e.g., front vs. rear modules).

IC Role / Device Role / Timing Role: Level-shifting and ground-isolating I²C configuration lines between domain controllers operating at different ground potentials.

Use Value: Prevents ground-loop currents and EMI-induced errors in multi-node vehicle networks, supporting ISO 11898-2 and LIN 2.2A standards.

Industrial Power-Over-Ethernet (PoE)

Medical Patient Monitoring Equipment

Use Scenario: Translating control signals between PoE PSE controller (48V domain) and isolated MCU (3.3V domain) in IEEE 802.3af/at PD designs.

IC Role / Device Role / Timing Role: Unidirectional command path (PSE → MCU) and bidirectional I²C (MCU ↔ PD controller) across 50V+ ground offsets.

Use Value: Meets IEC 62368-1 creepage/clearance requirements without reinforced insulation, simplifying certification.

Use Scenario: Isolating ECG/EEG analog front-end sensors (floating patient ground) from hospital-grade AC-powered processing units.

IC Role / Device Role / Timing Role: Bidirectional I²C interface for sensor configuration and calibration data exchange across medically mandated 1500Vrms isolation barriers.

Use Value: Achieves IEC 60601-1 2×MOPP isolation compliance using only one component, avoiding complex transformer-based solutions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ground-level translation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADUM1402ARWZ	Quad-channel digital isolator (25Mbps), uses iCoupler® capacitive isolation; requires separate 3.3V/5V supplies but no ground-offset limit specification.	Designed for general-purpose digital isolation-not optimized for large DC ground offsets; lacks native I²C clock stretching support.	Select when system-level isolation voltage (>2.5kV) is primary requirement and ground offset remains <5V.
ISO1540DR	Dual-channel I²C isolator (1Mbps), integrated 100kΩ pullups; rated for 2500VRMS isolation, but max ground offset unspecified and limited by internal architecture.	Targeted exclusively at I²C isolation; no unidirectional high-speed channels; lower data rate restricts use in fast configuration buses.	Select for cost-sensitive, low-speed I²C-only isolation where ground offset is <10V and layout space is constrained.

Compared with ADUM1402ARWZ and ISO1540DR, the MAX14842ATE+T uniquely combines 72V ground offset tolerance, 30Mbps unidirectional speed, and certified I²C clock stretching in a single 4mm × 4mm package-making it the only solution for automotive battery pack telemetry and high-voltage industrial bus bridging where both speed and offset are simultaneously critical.

Availability

MAX14842ATE+T is available at Aetrix Electronics and suitable for automotive battery management, industrial Power-over-Ethernet endpoints, medical isolation interfaces, and body control module designs requiring stable component supply across extended temperature and high-reliability lifecycles.

Supply support for MAX14842ATE+T 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and high-reliability ICs for automotive, industrial, and medical applications-with emphasis on power efficiency, signal integrity, and AEC-Q100 qualification.

The MAX14842ATE+T belongs to Maxim's isolated interface product line, engineered specifically to replace optocouplers and discrete isolation solutions in ground-offset-critical systems-delivering robust, small-footprint, and automotive-qualified digital translation.

FAQ

What is the maximum allowable ground potential difference for MAX14842ATE+T?

The MAX14842ATE+T supports a ground potential difference (VGNDB – VGNDA) from 0V to +72V, with GNDB required to be greater than or equal to GNDA. This is validated per Absolute Maximum Ratings and confirmed in the Typical Operating Circuit and Detailed Description sections of the datasheet. Exceeding +72V risks permanent damage, and operation below 0V violates the device's polarity constraint.

Does MAX14842ATE+T support I²C clock stretching, and how is it implemented?

Yes, MAX14842ATE+T explicitly supports I²C clock stretching on both bidirectional channels (I/OA1↔I/OB1 and I/OA2↔I/OB2). The device achieves this through guaranteed timing margins, open-drain output structure, and internal logic that maintains bus control during SCL hold conditions-verified in the General Description, Features list, and Bidirectional Channels section of the datasheet.

What happens to MAX14842ATE+T outputs during undervoltage conditions on VDDA or VDDB?

During undervoltage lockout (UVLO) on either VDDA or VDDB, MAX14842ATE+T forces all unidirectional outputs (OUTA1, OUTA2, OUTB1, OUTB2) high and places bidirectional outputs (I/OA1, I/OA2, I/OB1, I/OB2) in high-impedance state. This behavior is defined in the Startup and Undervoltage Lockout section and ensures predictable, fail-safe signaling during power transients.

Can MAX14842ATE+T translate between 3.3V and 5V logic levels on the same side?

No-MAX14842ATE+T does not perform intra-side voltage translation. Each side (A or B) operates at a single logic level defined by its supply: VDDA sets Side A logic thresholds (VIH = 0.7×VDDA), and VDDB sets Side B thresholds (VIH = 0.7×VDDB). However, VDDA and VDDB may differ (e.g., 3.3V and 5V), enabling inter-side level shifting across the ground offset barrier.

Is the exposed pad (EP) of MAX14842ATE+T required to be connected, and if so, to what?

Yes, the exposed pad (EP) of MAX14842ATE+T must be soldered to GNDA. Per the Pin Configuration and Package Information sections, EP is internally connected to GNDA and serves as the primary thermal path. Leaving it unconnected degrades thermal performance (θ_JA increases significantly) and risks exceeding junction temperature limits under continuous operation.

MAX14842ATE+T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:

Packaging:: Tape & Reel (TR)

Product Status:: Active

Translator Type:: Voltage Level

Channel Type:: Bidirectional

Number of Circuits:: 1

Channels per Circuit:: 6

Voltage - VCCA:: 3 V ~ 5.5 V

Voltage - VCCB:: 3 V ~ 5.5 V

Input Signal:: -

Output Signal:: -

Output Type:: Open Drain

Data Rate:: 30Mbps

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Features:: Power Supply Decoupling

Mounting Type:: Surface Mount

Supplier Device Package:: 16-WQFN Exposed Pad

MAX14842ATE+T FAQ

1.How can I place an order for MAX14842ATE+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX14842ATE+T 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 MAX14842ATE+T reliable?

The price and inventory of MAX14842ATE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14842ATE+T is usually 5 days.

3.What payment methods are accepted for MAX14842ATE+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14842ATE+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX14842ATE+T?

MAX14842ATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX14842ATE+T 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 MAX14842ATE+T?

For technical support, including MAX14842ATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14842ATE+T requirements.

6.How does Aetrix verify that MAX14842ATE+T is sourced from the original manufacturer or authorized distributors?

All MAX14842ATE+T 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 MAX14842ATE+T meets industry standards.

7.What is the process for return or replacement of MAX14842ATE+T?

All MAX14842ATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14842ATE+T, 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 MAX14842ATE+T part is unused and in its original packaging.

Return procedure for MAX14842ATE+T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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