LM567CN - 0.5MHz Tone Decoder, 8-Pin DIP | Texas Instruments
MPN: LM567CN ✓ AktifLM567CN Ringkasan
A tone decoder is a frequency-selective interface integrated circuit that belongs to the broader signal-processing and communications-interface hierarchy. Its oscillator and narrowband detector determine whether an incoming signal matches the programmed center frequency. The LM567 and LM567C families are commonly used when a system must acknowledge a carrier, command frequency, or control tone without requiring a general-purpose microcontroller to perform continuous frequency analysis.
Key features include one tone-decoding channel, a 4.75 V to 9 V supply range, approximately 12 mA supply current, and a saturated transistor output. The 8-pin DIP format supports through-hole PCB assembly and provides a practical migration path for designs using older tone-decoder implementations. The operating-temperature rating of 0°C to 70°C identifies this part as a commercial-temperature device rather than an extended-temperature or automotive-grade component.
The LM567CN combines a frequency-selective detector with an oscillator whose timing components establish the nominal tone frequency. External resistors and capacitors set the timing and filter characteristics, while the input stage determines the signal level presented to the decoder. Its transistor output provides a straightforward interface to logic gates, relays, counters, or system-control inputs without requiring a separate analog output amplifier.
Typical uses include telephone and communications signaling, remote-control receivers, industrial tone-command systems, frequency-selection modules, and embedded control systems. The LM567CN is most appropriate when a fixed or adjustable narrow-band tone must be detected reliably at a relatively high frequency compared with many audio tone decoders. System designers should verify timing tolerances, capture bandwidth, input signal level, and output-load requirements in the manufacturer datasheet.
Because this is a through-hole commercial-temperature tone decoder, the primary design trade-off is implementation simplicity versus modern integration and temperature range. A microcontroller-based detector may offer programmable filtering and logging, while the LM567CN provides autonomous hardware detection with minimal firmware. This page consolidates the verified supply, power, package, functional, and cross-reference information while clearly identifying parameters that still require confirmation from the complete manufacturer datasheet.
Pilihan pengganti yang segera untuk LM567CN — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
NE567
✅ Masuk Drop-In📋 Alternatif rujukan (tidak dalam katalog)
LM567
✅ Masuk Drop-In📋 Alternatif rujukan (tidak dalam katalog)
NTE832
✅ Masuk Drop-In📋 Alternatif rujukan (tidak dalam katalog)
LM567CN Spesifikasi
| Product Type | Tone decoder |
| Number of Circuits | 1 circuit |
| Nominal Decoding Frequency | 0.5 MHz |
| Supply Voltage Range | 4.75 V to 9 V |
| Arus Pemberi Arus | 12 mA |
| Power Dissipation | 1.10 W |
| Gambaran Suhu Operasi | 0°C to 70°C |
| Input Channels | 1 input channel |
| Output Channels | 1 output channel |
| Output Interface | Saturated transistor switch to ground |
| Kemasan | 8-pin DIP |
| Jenis Pemasangan | Through-hole |
| Manufacturer | National Semiconductor, acquired by Texas Instruments |
| Lead-Free Status | Contains lead |
Panduan Konfigurasi Pin LM567CN 8-pin dip
Konfigurasi pin untuk LM567CN (8-pin dip pakai). Penomeran pin, fungsi, dan garis bentuk koneksi ditakrifkan dalam dokumen pengeluar. Rujuk dokumen untuk kebentuk dan pedoman pengasman.
Tiada data garisan pin yang diperoleh untuk LM567CN.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
LM567CN patut untuk 6 aplikasis: Communications Tone Receiver, Remote Control Receiver, Industrial Tone Command Interface, Carrier Presence Detection, Frequency-Selective Control Module, Audio-Style Control Signaling.
Communications Tone Receiver
The LM567CN is suitable for detecting a selected communications or signaling tone because it provides one tone-decoding channel, a nominal 0.5 MHz center frequency, and a saturated transistor output for direct connection to digital control logic. The circuit can be placed between a communications receiver and a counter or controller so that a valid tone produces a deterministic low output. With a 4.75 V to 9 V supply and approximately 12 mA supply current, it also fits compact embedded interface boards. Before deployment, engineers should verify capture bandwidth, false-lock behavior, input level, and output-current capability in the complete manufacturer datasheet.
Disebarkan
Remote Control Receiver
The LM567CN can implement autonomous command-tone recognition in a remote-control receiver by driving its output whenever the selected passband contains the expected signal. This avoids requiring a microcontroller to continuously analyze the incoming waveform and can release processing resources for other control tasks. Its 8-pin DIP format is particularly convenient for through-hole prototype boards and legacy receiver layouts. The nominal 0.5 MHz operating point and 0°C to 70°C range are the principal constraints, so the design must confirm that the command frequency, environmental conditions, supply level, and output load remain within the verified operating requirements.
Disebarkan
Industrial Tone Command Interface
The LM567CN is appropriate for industrial equipment that uses a discrete tone as a command or presence signal. The decoder translates a frequency-selective input event into a transistor-switch output that can trigger a relay counter, isolation interface, or controller input. Its one-circuit implementation simplifies point-to-point signaling, while the 4.75 V to 9 V supply range supports conventional control rails. A production design should validate operation across the required temperature span, reject out-of-band tones, and ensure that the saturated output can safely drive the selected load; the commercial 0°C to 70°C rating is particularly important for factory environments.
Disebarkan
Carrier Presence Detection
The LM567CN can detect the presence of a carrier at a selected nominal frequency and present a logic-compatible indication to surrounding circuitry. This is useful in receiver, modem-adjacent, and test systems where downstream logic needs a simple carrier-valid signal rather than an analog level. The saturated transistor-to-ground output provides a direct hardware indication, while the single-decoder architecture limits the system to one selected frequency. Designers must ensure the incoming signal amplitude and spectral purity meet the detector requirements and should verify capture bandwidth, false-trigger probability, startup behavior, and output timing from the complete manufacturer documentation.
Disebarkan
Frequency-Selective Control Module
The LM567CN supports a compact frequency-selective control module in which external timing components establish the decoding frequency and the transistor output indicates a match. This arrangement is useful in legacy automation, test, and communication equipment where one dedicated tone must enable or qualify a subsystem. Compared with a software frequency analyzer, the dedicated decoder provides continuous autonomous detection with deterministic hardware output and minimal firmware involvement. The main engineering trade-offs are the fixed number of decoded tones, the commercial temperature range, and the need to validate oscillator accuracy and capture bandwidth for the actual system tolerances.
Disebarkan
Audio-Style Control Signaling
Although the LM567CN is specified at a nominal 0.5 MHz rather than a typical audio frequency, its tone-detection principle can be used for control signaling when the system frequency and external timing network are suitable. The output can acknowledge a command tone, enable a function, or coordinate equipment without continuously decoding an audio stream. This approach is useful in legacy access-control, signaling, and embedded-control equipment. Because the verified snippets do not provide the full bandwidth, sensitivity, or false-response curves, engineers must verify those parameters and test adjacent-frequency rejection before treating the LM567CN as an audio signaling solution.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk LM567CN — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | NE567 | LM567 | NTE832 |
|---|---|---|---|---|
| Package | 8-pin DIP | 8-pin DIP | 8-pin DIP | 8-pin DIP |
| Brand | Texas Instruments | Signetics | Texas Instruments | NTE |
| Product Type | Tone decoder | Functionally equivalent tone decoder | LM567-family tone decoder | LM567CN replacement |
Penyeberangsung Jelas
- Maintains a clearly identified Texas Instruments family lineage (vsNE567)
- Provides verified commercial-temperature operation (vsNTE832)
- Documents the core operating conditions required for design review (vsNE567)
- Uses a serviceable 8-pin DIP format (vsNE567)
Catatan Desain
Design the supply path for the verified 4.75 V to 9 V operating range and approximately 12 mA supply current. Place a local bypass capacitor at the device supply pin and keep its return connection short, because the tone-decision function can cause supply-current transitions that appear on shared analog wiring. Confirm the actual capacitor value, polarity, voltage rating, and ESR requirements from the complete manufacturer application circuit rather than assigning a value without that guidance.
Do not treat a generic NE567 or NTE832 reference as proof of drop-in compatibility. Although the cross-reference sources describe functional equivalence or replacement intent, they do not expose the complete package drawings, pin functions, timing limits, and output ratings. Before substituting a part, compare all eight connections and verify supply voltage, oscillator tolerance, capture bandwidth, output sink current, temperature range, and lead status. Perform a board-level false-trigger test with the intended signal level and adjacent-frequency interferers.
Keep the input path and timing components physically close to the associated device pins, and route the saturated transistor output away from sensitive timing nodes. Ground return currents should use the shortest practical path through the device ground pin, while external oscillator and filter components should avoid long loops that can increase noise pickup. The provided data does not include the manufacturer layout artwork, so reproduce the official application diagram and preserve its grounding and component-placement intent.
Establish the input amplitude and bandwidth experimentally because the verified snippets identify the passband function but do not provide the input sensitivity or capture-bandwidth curves. Use a controlled tone source to establish detection boundaries, examine behavior near the nominal 0.5 MHz frequency, and verify rejection of nearby tones. Include worst-case supply, temperature, component tolerance, and signal-level conditions in the validation matrix because nominal frequency alone does not guarantee reliable recognition.
Maklumat Kesediaan
The verified LM567CN specification listing states that the part contains lead and identifies a 0°C to 70°C commercial-temperature grade. RoHS, REACH, halogen-free, and conflict-minerals status were not established by the supplied source excerpts and remain unknown. AEC-Q100 is not applicable because the verified data does not identify an automotive-qualified LM567CN option.
