Product Overview
MX614P FSK Modem IC - Bell 202 Compatible, 1200 bps, 16-Pin DIP, 3V-5.5V Single Supply
Condition
Unused NOS sourced from an electronics distributor consolidating inventory. Leads are clean and unsoldered. Evaluation: Visual inspection only. Function testing not performed. Backed by our no-hassle satisfaction guarantee.
Ships same business day from Idaho. Packed carefully.
Product Overview
CML Microcircuits MX614P is a Bell 202 compatible FSK modem IC in a 16-pin through-hole PDIP package. It converts digital data to 1200 bps FSK tones for transmission over analog voice channels - two-way radios, telephone lines, or audio links - and demodulates received tones back to digital data. Earlier production runs carry the MX-COM brand; function is identical. Requires a single 3.0V to 5.5V supply and an external 3.58 MHz crystal for the internal clock.
Key Features
- Bell 202 compatible FSK modulation and demodulation
- Data rate: 1200 bps fixed
- Supply voltage: 3.0V to 5.5V single supply
- Package: 16-pin PDIP (through-hole)
- Current: ~1 mA typical operating, ~1 µA standby
- Half-duplex operation
- External 3.58 MHz crystal required for timing
- Also branded MX-COM on earlier production; functionally equivalent
Applications
- Packet radio TNCs (Terminal Node Controllers)
- APRS tracker hardware for amateur radio
- HART protocol industrial transmitters and SCADA telemetry
- Remote weather station data links
- Legacy modem circuit repair and restoration
Frequently Asked Questions
Is this compatible with the TCM3105 modem IC?
No. The MX614P is not pin-compatible with the TCM3105 without board modifications. Verify your circuit board schematic before substituting.
What crystal does this chip require?
An external 3.58 MHz crystal - commonly called a colorburst crystal - is required. It is not included with this IC.
Will this work for APRS or 1200 baud packet radio?
Yes. 1200 bps Bell 202 FSK is the standard modem protocol used in APRS trackers and packet radio TNCs. This IC is a direct fit for those applications.
Can it handle full-duplex operation?
No. The MX614P is half-duplex only. It cannot transmit and receive simultaneously. A different IC is required for full-duplex modem designs.
Is the MX-COM version different from the CML version?
Functionally identical. MX-COM was the earlier brand; CML Microcircuits acquired the product line. The MX614P designation and specifications are unchanged across both brands.
Verify your target supply voltage and crystal footprint against the MX614P datasheet before assembly. CML Microcircuits publishes the current datasheet; MX-COM archive sheets confirm backward compatibility.
