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NLSX4401DFT2G Equivalent & Substitute Parts
Part Overview
The NLSX4401DFT2G is a voltage level translator manufactured by onsemi, designed for bidirectional signal translation between different voltage domains. This device operates as a single-circuit, single-channel translator with a maximum data rate of 20Mbps and supports supply voltages from 1.65V to 5.5V on both VCCA and VCCB rails. The part is packaged in a 6-pin SC-88/SC70-6/SOT-363 surface mount configuration with unlimited moisture sensitivity rating.
The NLSX4401DFT2G is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this translator topology.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Translator Type | Voltage Level |
| Channel Type | Bidirectional |
| Number of Circuits | 1 |
| Channels per Circuit | 1 |
| Voltage - VCCA | 1.65V ~ 5.5V |
| Voltage - VCCB | 1.65V ~ 5.5V |
| Data Rate | 20Mbps |
| Operating Temperature | -55°C ~ 125°C |
| Mounting Type | Surface Mount |
| Package / Case | 6-TSSOP, SC-88, SOT-363 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the NLSX4401DFT2G is determined by the following critical parameters:
Functional Requirements:
- Translator Type: Voltage Level (bidirectional operation required)
- Channel Configuration: 1 Circuit, 1 Channel
- Voltage Range Compatibility: VCCA and VCCB operating ranges must encompass or overlap with 1.65V ~ 5.5V
- Data Rate: Minimum 20Mbps capability
Physical Requirements:
- Mounting Type: Surface Mount
- Package compatibility with 6-pin configurations
Compliance Requirements:
- RoHS3 Compliance
- Moisture Sensitivity Level 1 (Unlimited)
Substitute parts are grouped into two categories based on voltage range coverage and data rate capability:
Category A - Full Voltage Range Coverage (1.65V ~ 5.5V): Parts with VCCA and VCCB ranges that fully encompass the original specification, supporting extended temperature ranges and higher data rates.
Category B - Partial Voltage Range Coverage (0.8V ~ 3.6V): Parts with reduced voltage ranges suitable for 3.3V and lower voltage domain applications, offering significantly higher data rates (500Mbps) in compact packages.
Category C - Specialized Applications: Parts with asymmetric voltage ranges (VCCA 1.8V ~ 5.5V, VCCB 2.7V ~ 10V) designed for specific interface requirements such as SIM card applications.
Parameter Comparison
| Part Number | Manufacturer | Translator Type | Channel Type | VCCA Range | VCCB Range | Data Rate | Operating Temp | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| NLSX4401DFT2G | onsemi | Voltage Level | Bidirectional | 1.65V ~ 5.5V | 1.65V ~ 5.5V | 20Mbps | -55°C ~ 125°C | 6-TSSOP, SC-88, SOT-363 | Obsolete |
| 74AVC1T45GM,115 | Nexperia USA Inc. | Voltage Level | Bidirectional | 0.8V ~ 3.6V | 0.8V ~ 3.6V | 500Mbps | -40°C ~ 125°C | 6-XFDFN, SOT886 | Active |
| 74AVC1T45GS,132 | Nexperia USA Inc. | Voltage Level | Bidirectional | 0.8V ~ 3.6V | 0.8V ~ 3.6V | 500Mbps | -40°C ~ 125°C | 6-XFDFN, SOT1202 | Active |
| 74AVCH1T45GM,132 | Nexperia USA Inc. | Voltage Level | Bidirectional | 0.8V ~ 3.6V | 0.8V ~ 3.6V | 500Mbps | -40°C ~ 125°C | 6-XFDFN, SOT886 | Active |
| 74LVCH1T45GS,132 | NXP Semiconductors | Voltage Level | Bidirectional | Not Specified | Not Specified | Not Specified | Not Specified | Not Specified | Active |
| ADG3233BRMZ | Analog Devices Inc. | Voltage Level | Bidirectional | 1.65V ~ 3.6V | 1.65V ~ 3.6V | 10Mbps | -40°C ~ 85°C | 8-TSSOP, 8-MSOP | Active |
| LTC1555CGN#TRPBF | Analog Devices Inc. | Voltage Level | Bidirectional | 1.8V ~ 5.5V | 2.7V ~ 10V | Not Specified | 0°C ~ 70°C | 16-SSOP | Active |
| LTC1555IGN | Analog Devices Inc. | Voltage Level | Bidirectional | 1.8V ~ 5.5V | 2.7V ~ 10V | Not Specified | -40°C ~ 85°C | 16-SSOP | Active |
| LTC1555IGN#TRPBF | Analog Devices Inc. | Voltage Level | Bidirectional | 1.8V ~ 5.5V | 2.7V ~ 10V | Not Specified | -40°C ~ 85°C | 16-SSOP | Active |
| LTC1555LEGN#PBF | Linear Technology | Voltage Level | Bidirectional | 1.425V ~ 4.4V | 2.6V ~ 6V | Not Specified | -40°C ~ 85°C | 16-SSOP | Active |
| LTC1555LEGN#TRPBF | Analog Devices Inc. | Voltage Level | Bidirectional | 1.425V ~ 4.4V | 2.6V ~ 6V | Not Specified | -40°C ~ 85°C | 16-SSOP | Active |
Engineering Selection Recommendations
For Direct Replacement in 3.3V and Lower Voltage Domains:
The 74AVC1T45 series (74AVC1T45GM,115 and 74AVC1T45GS,132) from Nexperia USA Inc. and 74AVCH1T45GM,132 provide active product status with ROHS3 compliance and unlimited moisture sensitivity rating. These parts operate within 0.8V ~ 3.6V on both supply rails and deliver 500Mbps data rate capability, exceeding the original 20Mbps specification. Both are available in compact 6-pin surface mount packages. The primary limitation is the reduced voltage range, which excludes 5V-only applications.
For Extended Voltage Range Applications (1.65V ~ 5.5V):
The ADG3233BRMZ from Analog Devices Inc. maintains voltage compatibility with the original part (1.65V ~ 3.6V on both rails) and provides active product status with ROHS3 compliance. This part is packaged in an 8-pin MSOP configuration with bypass circuit integration. The data rate is specified at 10Mbps, which is lower than the original 20Mbps specification. Operating temperature range is -40°C ~ 85°C, narrower than the original -55°C ~ 125°C.
For Asymmetric Voltage Domain Translation (SIM Card and Specialized Interfaces):
The LTC1555 series (LTC1555CGN#TRPBF, LTC1555IGN, LTC1555IGN#TRPBF, LTC1555LEGN#PBF, LTC1555LEGN#TRPBF) from Analog Devices Inc. and Linear Technology provide asymmetric voltage ranges with VCCA supporting 1.8V ~ 5.5V and VCCB supporting 2.7V ~ 10V. These parts include SIM card interface capability and thermal-shutdown protection. All variants maintain ROHS3 compliance and unlimited moisture sensitivity rating. The 16-pin SSOP package accommodates multiple translation channels. Operating temperature ranges vary from 0°C ~ 70°C to -40°C ~ 85°C depending on variant selection.
Product Status Consideration:
All recommended substitute parts maintain active product status, ensuring ongoing availability and manufacturing support. The original NLSX4401DFT2G is classified as obsolete, making substitution necessary for new production and long-term supply chain planning.
Frequently Asked Questions (FAQ)
Q: Can the 74AVC1T45 series directly replace the NLSX4401DFT2G in all applications?
A: The 74AVC1T45 series is suitable for applications operating at 3.3V and lower voltage domains. The reduced voltage range (0.8V ~ 3.6V) excludes applications requiring 5V supply operation. Verify your system voltage requirements before selection.
Q: What is the primary advantage of the 74AVC1T45 series over the original part?
A: The 74AVC1T45 series delivers 500Mbps data rate capability compared to the original 20Mbps specification, providing 25x performance improvement. Both maintain single-circuit, single-channel bidirectional translation in compact 6-pin surface mount packages.
Q: Why do the LTC1555 parts have asymmetric voltage ranges?
A: The LTC1555 series is designed for specialized applications such as SIM card interfaces where different voltage domains require independent supply specifications. VCCA operates at 1.8V ~ 5.5V while VCCB operates at 2.7V ~ 10V, enabling translation between incompatible voltage systems with integrated thermal protection.
Q: Is the ADG3233BRMZ suitable for high-speed applications?
A: The ADG3233BRMZ is specified at 10Mbps data rate, which is lower than both the original NLSX4401DFT2G (20Mbps) and the 74AVC1T45 series (500Mbps). This part is appropriate for low-speed signal translation applications where voltage compatibility is the primary requirement.
Q: What packaging considerations apply when substituting the NLSX4401DFT2G?
A: The original part uses a 6-pin SC-88/SC70-6/SOT-363 package. The 74AVC1T45 series maintains 6-pin surface mount form factors (SOT886 and SOT1202), enabling direct PCB layout compatibility. The ADG3233BRMZ uses an 8-pin MSOP package requiring PCB redesign. The LTC1555 series uses 16-pin SSOP packages for multi-channel applications.
Q: Are all substitute parts RoHS3 compliant?
A: All recommended substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), matching the environmental and regulatory requirements of the original NLSX4401DFT2G.
Q: Which substitute part offers the widest operating temperature range?
A: The 74AVC1T45 series maintains -40°C ~ 125°C operating temperature range, matching the upper temperature limit of the original part. The original NLSX4401DFT2G extends to -55°C minimum temperature. The ADG3233BRMZ and most LTC1555 variants operate within -40°C ~ 85°C, which is narrower than the original specification.
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