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MC14600P is a 16-pin plastic DIP CMOS alarm-interface IC combining a high-impedance detect comparator, low-battery detection, LED signaling, oscillator, and piezoelectric horn-drive outputs.
Exact P order code, PDIP package, pin functions, and electrical figures were checked against the manufacturer's MC14600 Rev. 7 datasheet archived by NXP.
The MC14600 translates an external alarm-level voltage into audible and visual indicators. Its high-impedance detection path compares the sensor signal with an externally established threshold. A separate low-voltage comparator monitors battery condition, while the oscillator times LED pulses and drives a piezoelectric horn during alarm or low-battery signaling.
The manufacturer feature list cites 9 µA average supply current for battery-operated designs under its stated conditions.
An on-chip oscillator and paired horn outputs support a piezoelectric annunciator circuit.
The low-voltage comparator and horn-chirp function support low-battery signaling.
An external divider can set the alarm-detect threshold for the sensor interface.
The FET-input comparator and active guard help manage leakage in high-impedance sensing circuits.
Dedicated piezo horn outputs and an LED-drive output provide alarm indications.
The internal low-battery trip point may be shifted by an external resistor on LOW V SET.
The manufacturer lists reverse-battery protection, subject to its stated ratings and time limit.
The catalog records 16-DIP (0.300 inch, 7.62 mm). The manufacturer's ordering table identifies MC14600P as case 648-08, 16-lead plastic DIP, agreeing with the catalog. Use the controlled PDIP case drawing to check pin pitch, body width, seating height, and pin-1 orientation. The datasheet does not identify the P suffix as a Pb-free packaging designation; verify material compliance separately.

The registered 16-DIP JPG is absent locally and returns HTTP 404 on the production site; this draft is not publishable until that image is restored and verified.
Pin functions below follow the manufacturer's 16-PDIP top-view diagram. Consult the current drawing for complete wiring and unused-pin treatment.
Detect-comparator output, alarm-detect input, and active guard, respectively.
LOW V SET and low-voltage comparator output.
LED output, VDD supply, and VSS ground.
Timing resistor and oscillator capacitor connections.
Horn feedback, HORN OUT 1, and HORN OUT 2.
Alarm threshold input and two no-connect positions.
| Exact order code | MC14600P |
|---|---|
| Documented manufacturer | Freescale Semiconductor; datasheet hosted by NXP |
| Function | Low-power CMOS alarm IC with piezo horn driver |
| Package | 16-lead plastic DIP, case 648-08 |
| Recommended nominal supply | 9 V |
| Operating-voltage specification | 6 V to 12 V in the datasheet electrical table |
| Operating ambient range | -10 °C to +60 °C |
| Average supply current | 9 µA in the manufacturer feature summary |
| Alarm sensing | High-impedance detect comparator with external threshold setting |
| Battery sensing | Low-voltage comparator with adjustable threshold |
| Annunciation | Piezo horn outputs, low-battery chirp, pulsed LED output |
| Sense guard | Active-guard output adjacent to detect input |
Maximum ratings are not operating targets. Typical values depend on the datasheet's stated bias components, supply, temperature, and load; check the full tables and application circuit.
Other MC14600 variants appear in 16-pin SOIC or alternate material configurations. A different package or suffix is not automatically footprint- or qualification-equivalent. Compare pinout, horn-drive behavior, supply limits, battery threshold, temperature range, component network, material status, and system certification before replacing MC14600P. No unverified internal product link is made.
The MC14600 Rev. 7 technical datasheet bears Freescale Semiconductor identification and is hosted in NXP's document archive. It identifies the P-suffix part as case 648-08, 16 PDIP. Consult the current manufacturer record, lifecycle notices, and authorized documentation before procurement or design release.
Low-power voltage-threshold alarm circuits with horn indication.
External sensor signals converted into local audible and visual warnings.
Moisture-sensing circuits with an adjustable detect threshold.
Only as a component in a fully engineered, tested, and certified system.
Inspect the full order code, 16-PDIP case, pin-1 mark, device marking, lot traceability, and material documentation. Verify bias components, battery-loading behavior, horn output, and sensor thresholds during production testing. The listing alone does not establish authorized-channel provenance, certification, or fitness for any safety-critical application.
No. The IC interfaces an external detect signal and drives external alarm components.
Case 648-08, a 16-lead plastic DIP according to the manufacturer's ordering table.
Yes. The datasheet describes an external resistor at LOW V SET for shifting the threshold.
No. Finished-system design, testing, and applicable certification are separate responsibilities.
Do not rely on this IC alone for life-safety decisions. Evaluate sensor failures, battery depletion, horn audibility, environmental range, false alarms, supervisory testing, and regulatory requirements in the complete product. Use the controlled manufacturer datasheet as the design authority. Publication is blocked until the correct production package JPG is accessible and verified.
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