MM2-T-U Equivalent & Substitute Parts Reference

Part Overview

The MM2-T-U is a General ISM < 1GHz transceiver module manufactured by FreeWave Technologies, operating in the 902MHz ~ 928MHz frequency band. This module integrates a chip chassis mount antenna and supports GFSK modulation with a data rate of 153.6kbps. The product is currently obsolete, making identification of compatible substitute components essential for system maintenance, redesign, and procurement planning.

Substiute Parts

MM2-T-U

FreeWave TechnologiesIn Stock: 714MM2-T-U Datasheet

Current PartRFQ

MM3-T

FreeWave TechnologiesIn Stock: 923MM3-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MM2-T-U is determined by the following critical parameters:

• Frequency Range: Must operate within 902MHz ~ 928MHz ISM band
• Modulation Type: Must support GFSK modulation
• Serial Interface: Must provide Serial TTL connectivity
• Mounting Configuration: Must support Chassis Mount installation
• Power Supply Voltage: Must be compatible with 5V supply architecture
• Current Characteristics: Receiving and transmitting current profiles must align with system power budget
• Operating Temperature Range: Must maintain -40°C ~ 85°C operational envelope
• Sensitivity Performance: Must achieve -108dBm sensitivity specification

The MM3-T qualifies as a manufacturer-recommended substitute based on alignment across all critical electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The MM3-T is the manufacturer-recommended substitute for the obsolete MM2-T-U. Both modules maintain identical electrical performance across frequency, modulation, data rate, sensitivity, and power consumption parameters. The primary design consideration is antenna configuration: the MM2-T-U includes an integrated chip antenna, while the MM3-T requires external antenna integration. System designs utilizing the MM3-T must accommodate external antenna selection and placement within the mechanical envelope.

The MM3-T supply voltage specification (4.75V ~ 5.25V) provides improved tolerance margins compared to the MM2-T-U nominal 5V specification, offering enhanced compatibility with regulated power supplies. Both modules maintain identical RoHS non-compliance status and operate across the full -40°C ~ 85°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can the MM3-T directly replace the MM2-T-U without circuit modifications?

A: Electrical substitution is direct for all signal and power connections. The primary design change involves antenna integration. The MM2-T-U integrated chip antenna must be replaced with an external antenna matched to the 902MHz ~ 928MHz frequency band when implementing the MM3-T.

Q: Are the data rate capabilities compatible between MM2-T-U and MM3-T?

A: Yes. The MM2-T-U operates at 153.6kbps. The MM3-T supports both 115.2kbps and 153.6kbps data rates, allowing operation at the original 153.6kbps specification.

Q: What is the impact of the antenna type difference?

A: The MM2-T-U integrates a chip antenna within the module package. The MM3-T requires external antenna connection. System designs must include antenna selection, impedance matching, and PCB layout considerations for the external antenna implementation.

Q: Are supply voltage specifications compatible?

A: Yes. The MM2-T-U specifies 5V nominal supply. The MM3-T specifies 4.75V ~ 5.25V, which encompasses the 5V nominal point. Standard 5V regulated supplies are compatible with both modules.

Q: Do current consumption profiles differ between the modules?

A: No. Both modules draw 90mA during receive operation and 855mA during transmit operation. Power budget calculations remain unchanged during substitution.

Q: Are there packaging or inventory considerations?

A: The MM2-T-U is obsolete with 671 units in stock. The MM3-T is active production with 907 units available. Long-term availability favors the MM3-T for new designs and ongoing procurement.