Product Overview
Phase-Locked Loop Tone Decoder 0.01Hz–300kHz 4.5–20V
Condition
Unused, New Old Stock (NOS). Visual inspection completed with no issues noted. Sourced from an electronics distributor that was consolidating inventory.
Ships same business day. Reliable parts at honest prices since 1999. Real humans.
Product Overview
Exar XR-2211ACP is a monolithic phase-locked loop system designed primarily for Frequency Shift Keying (FSK) demodulation and tone decoding. It converts frequency-modulated analog signals into clean digital logic outputs using an internal PLL, quadrature phase detector, and voltage comparator stage. The "A" version offers improved temperature stability and power supply rejection compared to earlier revisions.
Operating from 4.5V to 20V DC, the XR-2211ACP covers a wide frequency range from 0.01 Hz up to 300 kHz. Center frequency and bandwidth are defined by external timing components, giving engineers flexibility for modem, caller ID, and radio interface designs. This is the commercial-grade ACP variant rated for 0°C to +70°C operation.
Key Features
- Monolithic PLL system for FSK demodulation and tone decoding
- Supply voltage range: 4.5V to 20V DC
- Frequency range: 0.01 Hz to 300 kHz
- Input signal sensitivity: 10 mV to 3 V RMS
- Typical current consumption: 5 mA
- Operating temperature: 0°C to +70°C (ACP commercial grade)
- Improved temperature stability: 100 ppm/°C typical
- External R and C set center frequency and bandwidth
- DIP-14 through-hole package
Applications
- Bell 103 and 212A compatible legacy modem circuits
- Caller ID FSK decoding
- Amateur radio RTTY and SSTV interfaces
- Tone detection and remote control decoding
- Industrial telemetry receivers
- Analog communication interface boards
- Repair of legacy telecommunications equipment
Frequently Asked Questions
What does the XR-2211ACP do?
It demodulates FSK signals and decodes tones using an internal phase-locked loop, producing digital outputs based on the detected frequency.
How is the center frequency set?
The center frequency is determined by external timing components connected to the designated resistor and capacitor pins.
What supply voltage does it require?
It operates from 4.5V to 20V DC.
Is this suitable for modern high-speed data links?
The XR-2211ACP is typically used in low-speed FSK and tone applications rather than modern high-speed digital communication systems.
What temperature range is supported?
This ACP commercial-grade version is rated for operation from 0°C to +70°C.
When communication meant tracking tones and locking onto carriers in real time, the XR-2211ACP was the workhorse. If your board calls for classic PLL-based FSK decoding, this Exar part keeps the signal chain authentic and functional.
