A2135-H Equivalent & Substitute Parts

Part Overview

The A2135-H is a SiRFstarIV™-based RF receiver GPS module manufactured by Lantronix, Inc., operating at 1.575GHz with -163dBm sensitivity. This surface-mount module integrates on-board patch antenna technology and supports I2C and SPI data interfaces. The product is currently obsolete, making equivalent substitute parts necessary for ongoing system support, maintenance, and new design implementations requiring compatible GPS receiver functionality.

Substiute Parts

A2135-H

Lantronix, Inc.In Stock: 888A2135-H Datasheet

Current PartRFQ

A2235H

Lantronix, Inc.In Stock: 3223A2235H Datasheet

MFR RecommendedRFQ

A5135H

Lantronix, Inc.In Stock: 723A5135H Datasheet

MFR RecommendedRFQ

A5135H

Lantronix, Inc.In Stock: 723A5135H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A2135-H is determined by the following core parameters:

Primary Compatibility Criteria:

• Frequency band alignment (1.575GHz GPS L1 band)
• Sensitivity performance (-163dBm or better)
• Data interface support (I2C and/or SPI)
• Voltage supply compatibility (3.3V nominal operation)
• Operating temperature range (-40°C ~ 85°C)
• Surface-mount module form factor
• ECCN classification (7A994)

Substitute Parts:

A2235H meets primary criteria with enhanced data rate (4.8kbps) and expanded data interface options (GPIO, I2C, SPI, UART). Voltage supply range 3V ~ 3.6V encompasses the A2135-H 3.3V requirement. Product status is active.

A5135H exceeds primary criteria with multi-constellation support (GLONASS, GNSS, GPS), dual-frequency operation (1.575GHz, 1.602GHz), improved sensitivity (-165dBm), and higher data rate (9.6kBaud). Voltage supply range 3V ~ 3.6V and expanded data interfaces (GPIO, I2C, SPI, UART) provide enhanced functionality. Product status is active.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Minimal Design Changes):

The A2235H provides the most direct substitution path. It maintains GPS-only protocol operation, identical sensitivity performance (-163dBm), and core data interface compatibility (I2C, SPI). The voltage supply range 3V ~ 3.6V is compatible with 3.3V system designs. Active product status ensures long-term availability and manufacturing support. The 22-SMD Module package requires PCB layout verification against the original Module form factor.

For Enhanced Capability Replacement:

The A5135H offers multi-constellation GNSS capability (GPS, GLONASS) with improved sensitivity (-165dBm) and higher data throughput (9.6kBaud). Dual-frequency operation (1.575GHz L1, 1.602GHz L2) enables advanced positioning algorithms. Active product status and expanded data interface support (GPIO, I2C, SPI, UART) provide design flexibility. The 22-SMD Module package and voltage supply compatibility (3V ~ 3.6V) align with system requirements. This option is suitable for applications requiring enhanced positioning accuracy or multi-constellation support.

Both substitutes carry identical ECCN classification (7A994), maintaining export compliance alignment with the original A2135-H.

Frequently Asked Questions (FAQ)

Q: Can the A2235H directly replace the A2135-H without firmware changes?

A: The A2235H maintains GPS protocol operation and core data interface support (I2C, SPI). However, the package transition from Module to 22-SMD Module requires PCB layout verification. Firmware compatibility depends on specific implementation details not provided in the parameter set.

Q: What is the primary advantage of selecting A5135H over A2235H?

A: The A5135H provides multi-constellation support (GPS, GLONASS, GNSS) and dual-frequency operation (1.575GHz, 1.602GHz), enabling improved positioning accuracy and availability. Sensitivity is enhanced to -165dBm, and data rate capability increases to 9.6kBaud. These enhancements are beneficial for applications requiring robust positioning in challenging environments.

Q: Are voltage supply differences between 3.3V and 3V ~ 3.6V significant?

A: The A2135-H operates at fixed 3.3V. Both substitutes (A2235H and A5135H) accept 3V ~ 3.6V supply ranges, which encompass 3.3V operation. System power supply design must confirm stable delivery within the substitute part's specified range.

Q: What package considerations apply when transitioning from A2135-H to substitutes?

A: The A2135-H uses a Module package, while both A2235H and A5135H use 22-SMD Module packages. PCB footprint, mounting height, and connector compatibility require engineering review. Mechanical integration verification is necessary before production implementation.

Q: Do all three parts share the same export compliance classification?

A: Yes. The A2135-H, A2235H, and A5135H all carry ECCN 7A994 classification, maintaining consistent export compliance requirements across substitution options.

Q: Which substitute is recommended for new designs?

A: Selection depends on application requirements. For GPS-only positioning with minimal design changes, A2235H is appropriate. For applications requiring multi-constellation GNSS capability and enhanced accuracy, A5135H is the preferred choice. Both are active products with established manufacturing support.