MICRF104YM Equivalent & Substitute Parts

Part Overview

The MICRF104YM is an RF transmitter IC manufactured by Microchip Technology, designed for ASK and OOK modulation in the 300MHz to 470MHz frequency band. This device operates at -2dBm output power with a maximum data rate of 20kbps and is housed in a 14-SOIC surface mount package. The MICRF104YM is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Key Parameters

Parameter	MICRF104YM
Frequency Range	300MHz ~ 470MHz
Modulation Type	ASK, OOK
Output Power	-2dBm
Data Rate (Max)	20kbps
Supply Voltage	1.8V ~ 4V
Transmit Current	12mA
Operating Temperature	0°C ~ 85°C
Package Type	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MICRF104YM are selected based on the following critical parameters that define functional equivalence:

Frequency overlap within the 300MHz ~ 470MHz band
Compatible modulation protocols (ASK and/or OOK support)
Surface mount antenna interface capability
RoHS3 compliance and REACH unaffected status
Active product status for ongoing availability

The two identified substitutes represent different trade-offs in package size, output power, and data rate capability while maintaining core RF transmitter functionality and regulatory compliance.

Parameter Comparison

Parameter	MICRF104YM	MICRF112YMM	MICRF113YM6-TR
Frequency Range	300MHz ~ 470MHz	300MHz ~ 450MHz	300MHz ~ 450MHz
Modulation Type	ASK, OOK	ASK, FSK	ASK
Output Power	-2dBm	10dBm	10dBm
Data Rate (Max)	20kbps	50kbps	10kbps
Supply Voltage	1.8V ~ 4V	1.8V ~ 3.6V	1.8V ~ 3.6V
Transmit Current	12mA	11mA	12.5mA
Operating Temperature	0°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package Type	14-SOIC	10-TFSOP, 10-MSOP	SOT-23-6
Product Status	Obsolete	Active	Active
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both substitute parts are manufactured by Microchip Technology and maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original MICRF104YM.

MICRF112YMM is an active product with extended operating temperature range (-40°C ~ 125°C) and higher output power (10dBm) compared to the original part. This substitute supports both ASK and FSK modulation with increased data rate capability (50kbps). The 10-TFSOP/10-MSOP package represents a significant reduction in footprint compared to the 14-SOIC original package.

MICRF113YM6-TR is an active product offered in SOT-23-6 package, the smallest form factor of the three options. This substitute maintains ASK modulation support with 10dBm output power. The extended operating temperature range (-40°C ~ 85°C) and reduced data rate (10kbps) should be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can MICRF112YMM directly replace MICRF104YM in existing PCB layouts?

A: No. The MICRF112YMM uses a 10-TFSOP/10-MSOP package versus the original 14-SOIC package. PCB layout modifications are required, including pad pattern changes and potential antenna interface adjustments.

Q: What is the primary advantage of MICRF113YM6-TR as a substitute?

A: The MICRF113YM6-TR offers the smallest package footprint (SOT-23-6), enabling space-constrained designs. However, it supports only ASK modulation and has a lower maximum data rate (10kbps) compared to the original part.

Q: Are both substitutes compatible with the original MICRF104YM's frequency band?

A: Both substitutes operate in the 300MHz ~ 450MHz range, which overlaps with but does not fully cover the original 300MHz ~ 470MHz band. Applications requiring operation above 450MHz cannot use these substitutes.

Q: What is the impact of the higher output power in MICRF112YMM?

A: MICRF112YMM provides 10dBm output power versus -2dBm in the original part. This 12dB increase in output power may require circuit design adjustments and should be evaluated for compliance with regional RF emission regulations.

Q: Do both substitutes support OOK modulation like the original part?

A: MICRF112YMM supports ASK and FSK modulation. MICRF113YM6-TR supports ASK only. Neither substitute explicitly lists OOK support. Applications requiring OOK modulation must verify compatibility through detailed datasheet review.

Q: What are the supply voltage constraints when substituting?

A: The original MICRF104YM operates at 1.8V ~ 4V. Both substitutes operate at 1.8V ~ 3.6V, a narrower range. Designs operating above 3.6V require voltage regulation modifications.

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