NB4N11MDTG Equivalent & Substitute Parts

Part Overview

The NB4N11MDTG is a mixed signal translator IC manufactured by onsemi, designed for unidirectional signal translation across multiple input and output standards. This 8-TSSOP packaged device supports 2.5 Gbps data rates and operates across the -40°C to 85°C temperature range. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

NB4N11MDTG

onsemiIn Stock: 1199NB4N11MDTG Datasheet

Current PartRFQ

SN65LVEL11DGK

Texas InstrumentsIn Stock: 2509SN65LVEL11DGK Datasheet

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SN65LVEL11DGKR

Texas InstrumentsIn Stock: 2831SN65LVEL11DGKR Datasheet

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SY55855VKG-TR

Microchip TechnologyIn Stock: 2252SY55855VKG-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NB4N11MDTG is determined by the following critical parameters:

Primary Substitution Criteria:

• Translator type: Mixed signal unidirectional architecture
• Channel configuration: Single circuit with 2 channels
• Output type: Differential output
• Package compatibility: 8-TSSOP or 8-MSOP footprint
• Operating temperature range: -40°C to 85°C minimum
• Data rate capability: Minimum 2.5 Gbps support

Input/Output Signal Compatibility: The NB4N11MDTG accepts multiple input standards (CML, LVCMOS, LVDS, LVPECL, LVTTL) and outputs CML. Substitute parts must support overlapping signal standard compatibility to maintain functional equivalence in existing circuit implementations.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and REACH unaffected status to ensure regulatory alignment with the original component specification.

Parameter Comparison

Engineering Selection Recommendations

SY55855VKG-TR (Microchip Technology) is the closest functional equivalent to the NB4N11MDTG. Both devices are mixed signal unidirectional translators with identical circuit and channel configurations, differential output architecture, and matching operating temperature ranges. The SY55855VKG-TR maintains active product status with ROHS3 compliance and superior moisture sensitivity rating (MSL 1 vs. MSL 3). The primary design consideration is the reduced data rate specification (1.5 Gbps vs. 2.5 Gbps) and package footprint difference (10-MSOP vs. 8-TSSOP), which may require PCB layout modifications.

SN65LVEL11DGK and SN65LVEL11DGKR (Texas Instruments) are functionally distinct from the NB4N11MDTG, classified as clock fanout buffers rather than signal translators. These devices feature a 1:2 input-to-output ratio and support ECL/PECL signal standards. While they share the same operating temperature range, package footprint compatibility (8-VSSOP), and active product status, their functional architecture differs significantly from the original translator topology. Selection of these parts requires circuit-level redesign to accommodate fanout buffer operation rather than direct signal translation.

All substitute options maintain regulatory compliance through ROHS3 certification and REACH unaffected status, ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the SY55855VKG-TR directly replace the NB4N11MDTG without PCB modifications?

A: The SY55855VKG-TR uses a 10-MSOP package versus the NB4N11MDTG's 8-TSSOP package. While both are surface mount devices with 0.118" width, the pin count and layout differ, requiring PCB footprint redesign. Functional signal translation capability is preserved.

Q: What is the impact of the 1.5 Gbps data rate on the SY55855VKG-TR compared to the 2.5 Gbps specification of the NB4N11MDTG?

A: The reduced data rate of the SY55855VKG-TR limits its application to systems operating at or below 1.5 Gbps. Systems designed for 2.5 Gbps operation cannot use this substitute without performance degradation.

Q: Are the Texas Instruments SN65LVEL11 variants suitable replacements for the NB4N11MDTG?

A: The SN65LVEL11 devices function as clock fanout buffers with 1:2 distribution capability, fundamentally different from the NB4N11MDTG's unidirectional signal translator architecture. These parts are not direct functional equivalents and require circuit redesign for implementation.

Q: What is the significance of the MSL rating difference between the NB4N11MDTG and substitute parts?

A: The NB4N11MDTG carries MSL 3 (168 hours), requiring controlled moisture exposure during storage and handling. Substitute parts with MSL 1 (unlimited) offer superior moisture tolerance and reduced handling constraints during manufacturing and assembly processes.

Q: Do all substitute parts maintain the same input signal standard compatibility?

A: No. The NB4N11MDTG accepts CML, LVCMOS, LVDS, LVPECL, and LVTTL inputs. The SY55855VKG-TR accepts CML, PECL, and LVPECL. The SN65LVEL11 variants accept ECL and PECL. Input standard compatibility must be verified against specific circuit requirements before substitution.

Q: Are all listed substitutes currently available for procurement?

A: The SY55855VKG-TR, SN65LVEL11DGK, and SN65LVEL11DGKR all maintain active product status with documented inventory availability. The NB4N11MDTG is obsolete and no longer manufactured.