MICRF104BM

$2.24

Description：RF TX IC ASK 300-470MHZ 14SOIC
Series：-
Mfr：Microchip Technology
Package：Tube

SKU:8bfabb104a2a Category: RF Transmitters Brand: Microchip Technology

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Product introduction

MICRF104BM is listed in the RF Transmitter range at ChipApex. The manufacturer field lists Microchip Technology. Its product description is RF TX IC ASK 300-470MHZ 14SOIC. Review the specifications below when checking this part for your BOM.

RF Transmitter specifications for MICRF104BM

Description：RF TX IC ASK 300-470MHZ 14SOIC
Series：-
Mfr：Microchip Technology
Package：Tube
Frequency：300MHz ~ 470MHz
Applications：RKE
Modulation or Protocol：ASK, OOK
Data Rate (Max)：20kbps
Power - Output：-2dBm
Current - Transmitting：12mA
Data Interface：PCB, Surface Mount
Antenna Connector：PCB, Surface Mount
Memory Size：-
Features：-
Voltage - Supply：1.8V ~ 4V
Operating Temperature：0°C ~ 85°C
Mounting Type：Surface Mount
Package / Case：14-SOIC (0.154", 3.90mm Width)
Supplier Device Package：14-SOIC
Grade：-
Qualification：-

RF Transmitter datasheet and documents for MICRF104BM

MICRF104BM

RF Transmitter Overview

The MICRF104BM is an obsolete RF transmitter IC from Microchip Technology, designed for ASK/OOK modulation in the 300MHz to 470MHz frequency range. It features a built-in DC/DC converter that boosts input voltage to 5V for the RF section, enabling operation from lower supply voltages. The device delivers -2dBm output power and supports data rates up to 20kbps. It is housed in a 14-SOIC package with surface mount installation. Operating temperature ranges from -40°C to 85°C, and it requires a supply voltage between 4.75V and 5.5V.

RF Transmitter Feature Summary

Incorporates an integrated DC/DC converter to boost input voltage for RF operation
Supports ASK and OOK modulation protocols for wireless communication
Designed for low-power remote keyless entry (RKE) applications

RF Transmitter Applications

Remote Keyless Entry (RKE) systems
Wireless alarm systems
Low-speed telemetry links

RF Transmitter Procurement Notes

The MICRF104BM is officially discontinued and no longer manufactured by Microchip Technology. Distributors such as DigiKey have ceased sales of this component. Verification of current availability should focus on finding direct substitutes like the MICRF104YM or exploring surplus channels, as original stock is extremely limited. Ensure any sourced units are verified for authenticity due to the component's end-of-life status.

RF Transmitter Selection Notes

Designers should note that the MICRF104BM is not recommended for new designs due to its obsolete status. The primary selection consideration is identifying a pin-compatible or functionally equivalent replacement, such as the MICRF104YM. Evaluation must include verifying the 14-SOIC footprint compatibility and confirming that the substitute supports the required 300-470MHz band and ASK/OOK modulation without requiring significant circuit redesign.

RF Transmitter Part Context

This component belongs to the MICRF10x series of low-power RF transmitters. It is distinct from the MICRF102, which uses an 8-SOIC package, whereas the MICRF104 utilizes a 14-SOIC form factor. The series targets simple, cost-effective wireless control applications where moderate range and low data rates are sufficient. The inclusion of an internal DC/DC converter differentiates it from simpler transmitters that require external biasing networks.

RF Transmitter Replacement Considerations

The MICRF104YM is listed as a direct substitute by distributors. Both components share the same manufacturer and functional specifications. Engineers must verify that the YM suffix variant maintains identical pinout and electrical characteristics before replacing the BM version in existing hardware.