BETAOperating supply3.5–8.5 V · 5 V example
Phase-locked-loop tone decoder
LM567 Specifications
Review LM567 electrical specifications, operating conditions and package details.
Package view
Key specifications
The oscillator and phase detectors track an input near the selected center. External filters determine how quickly and selectively the output responds.
Example center909 Hz · nominal
Selected ambient0–70 °C · CN / CM
Detection outputLOW Open collector · add pull-up
Package details
LM567CN/NOPB · PDIP-8
| Property | Details |
|---|---|
| Manufacturer | Texas Instruments |
| Part number | LM567CN/NOPB |
| Package | PDIP-8 |
| Connections | 8 pins |
| Mounting | Through-hole |
| Lead pitch | 2.54 mm |
| Package code | dip |
| Thermal reference | θJA 53.0°C/W · manufacturer thermal table |
Supply and signal reference
LM567C · 5 V / 25°C electrical tests
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Operating supply | 3.5–8.5 V | Recommended operating table; use 5 V for the example |
| Selected ambient | 0 to +70°C | CN / CM ordering options |
| Quiescent supply current | 7 mA typical; 10 mA maximum | RL = 20 kΩ |
| Activated supply current | 12 mA typical; 15 mA maximum | RL = 20 kΩ |
| Input resistance | 15 kΩ minimum; 20 kΩ typical | Tone input pin 3 |
| Smallest detected input | 20 mV RMS typical; 25 mV RMS maximum | Input at center frequency; manufacturer IL = 100 mA condition |
No specifications match. Try a parameter name or a unit.
Detection depends on frequency, amplitude, filtering and the manufacturer test conditions.
Timing and selectivity
External components define the application
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Approximate center frequency | 1 / (1.1 × R1 × C1) | R in ohms; C in farads; result in hertz |
| Timing resistor | Pins 5 to 6 | 10 kΩ in the example |
| Timing capacitor | Pin 6 to ground | 100 nF in the example |
| Highest center frequency | 100 kHz minimum; 500 kHz typical | 500 kHz is not a guaranteed limit for every unit |
| Largest detection bandwidth | 14% typical; 10–18% limits | Maximum-setting test; not the width of every filter network |
| Fastest on/off cycling | f₀ / 20 typical | Reference condition, not instantaneous detection |
No specifications match. Try a parameter name or a unit.
R/C tolerance shifts the center; filter values and signal amplitude determine the usable detection band.
Open-collector output
Pin 8 sinks current on detection
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Output LOW at 30 mA | 0.2 V typical; 0.4 V maximum | 25 mV test input |
| Output LOW at 100 mA | 0.6 V typical; 1.0 V maximum | 25 mV test input |
| Output leakage | 0.01 µA typical; 25 µA maximum | Output at 15 V |
| Output rise / fall time | 150 ns / 30 ns typical | Electrical test circuit |
| Example pull-up | 10 kΩ to +5 V | Less than 0.5 mA when LOW |
| Released output | HIGH through the pull-up | The IC does not actively source that HIGH voltage |
No specifications match. Try a parameter name or a unit.
Large sink currents increase power dissipation; the lightly loaded example avoids that condition.
909 Hz detector example
Grounded signal generator and regulated 5 V
Manufacturer specifications 7 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Input tone | 100 mV RMS near 909 Hz | AC-coupled through 100 nF to pin 3 |
| R1 / C1 | 10 kΩ / 100 nF | R1: 5–6; C1: 6–ground |
| C2 loop filter | 1 µF | Pin 2 to ground; positive at the pin |
| C3 output filter | 2.2 µF | Pin 1 to ground; at least 2 × C2 |
| Supply bypass | 100 nF + 1 µF | Across pins 4 and 7, near the package |
| Output reading | LOW after detection settles | High-impedance meter on pin 8 |
| Nominal arithmetic | 909.1 Hz | 1 / (1.1 × 10000 × 100 × 10⁻⁹) |
No specifications match. Try a parameter name or a unit.
This is an illustrative tuned detector, not a specified instrument. Sweep and calibrate the assembled circuit.
Package and stress limits
LM567CN/NOPB · PDIP-8
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Pitch / mounting | 2.54 mm | Through-hole |
| Package numbering | 8 physical pins | Top view; counterclockwise from the marker |
| Supply stress limit | 9 V absolute maximum | Do not confuse with 8.5 V recommended maximum |
| Output stress limit | 15 V at pin 8 | External collector voltage; observe dissipation |
| Storage | −65 to +150°C | Unpowered |
| Layout | Short timing and filter returns | Separate output-load currents from the sensitive input path |
No specifications match. Try a parameter name or a unit.
Absolute ratings are stress boundaries. The downloadable land pattern must be checked against the chosen assembly process.
Connections by function
Select a pin for its function, connection guidance and electrical notes.