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Microchip Technology RE46C107E16F
- Part No.:
- RE46C107E16F
- Manufacturer:
- Microchip Technology
- Category:
- Sensor and Detector Interfaces
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
RE46C107E16F.pdf
- Description:
- IC HORN DRIVER DUAL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,260
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Product details
Overview
RE46C107E16F from Microchip Technology (via R&E International) is a highly integrated mixed-signal IC combining a DC-DC up-converter, 3.0V/3.3V selectable LDO regulator, piezoelectric horn driver, LED driver, and low-battery detection circuitry - all in a single 16-pin SOIC package. It targets battery-powered safety and alert devices requiring efficient voltage boosting, regulated microprocessor supply, and audible signaling.
For engineers reviewing the RE46C107E16F datasheet, RE46C107E16F pinout, RE46C107E16F application, or RE46C107E16F equivalent, key selection considerations include VO output voltage (4V or 10V), VREG selectability (3.0V/3.3V), LBOUT logic signaling, FEED feedback interface for horn resonance tuning, and brown-out protection at VO < 3.2–4.0V.
Technical Context
The RE46C107E16F integrates three functional blocks: a current-mode DC-DC boost converter with LX/VSS2 switching outputs and VO regulation (8.5–11V typical), a precision bandgap-based LDO regulator with REGSEL-controlled output (3.0V or 3.3V ±50mV load regulation), and a complementary NMOS horn driver (HORNB/HORNS) supporting resonant piezo transducers via FEED feedback sensing.
Its control logic enables mode-selectable operation: low-battery detection activates high-boost mode (VO ≈10V); HRNEN enables horn oscillation only when VO is above brown-out threshold (3.2–4.0V); LBST and LBSET configure low-battery threshold (2.3–2.55V) using external resistive dividers; and FEED input allows closed-loop frequency tracking for optimal acoustic output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VO Output Voltage | 4V (low-boost) or 10V (high-boost); determines piezo drive amplitude and audible SPL |
| VREG Output | Selectable 3.0V (REGSEL=VSS) or 3.3V (REGSEL=VDD); powers MCU or sensor with ±50mV load regulation |
| Quiescent Current | 7–10.5 µA; enables multi-year battery life in smoke/CO detectors |
| Low Battery Threshold | 2.3–2.55V at VDD; triggers LBOUT signal and enables high-boost mode |
| Brown-out Threshold | 3.2–4.0V at VO; disables regulator/horn to prevent unreliable operation under weak boost |
| Horn Driver Ron | <0.5V drop at 16mA; ensures efficient drive into piezo impedance without excessive heating |
| FEED Input Range | –10V to +22V; supports direct connection to piezo feedback electrode with current-limiting resistor |
Pinout & Package
RE46C107E16F is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, RoHS-compliant Pb-free option available. Thermal pad not present; standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LBST | Logic enable for low-battery detection | Activates high-boost mode and LBOUT when asserted; levels scale with VREG |
| 2 LBSET | Low-battery comparator input | Connects to VDD divider; internal 400kΩ/240kΩ ratio sets ~2.4V threshold |
| 3 VDD | Main power input | Accepts 2.0–5.0V battery supply; powers internal logic and boost switch |
| 4 LEDEN | LED driver enable | Controls open-drain LED output; disabled during brown-out |
| 5 LED | Open-drain LED driver | Sinks up to 10mA; requires external anode resistor |
| 6 LX | Boost switch drain | Drives external inductor; must connect to VDD through low-R path |
| 7 VSS2 | Boost switch source | Internal NMOS source node; connect directly to battery negative |
| 8 VSS | Digital ground | Reference for logic inputs and outputs; tie to VSS2 with low-inductance path |
| 9 REGSEL | VREG output voltage selector | Tie to VDD for 3.3V, VSS for 3.0V; no floating allowed |
| 10 VREG | Regulated output | Supplies MCU/sensors; clamped at 3.35–4.25V to prevent overvoltage damage |
| 11 VO | Boosted output | Delivers 4V or 10V; feeds horn driver and brown-out comparator |
| 12 HORNB | Horn metal electrode driver | Complementary NMOS output; drives B-side of piezo transducer |
| 13 HORNS | Horn ceramic electrode driver | Complementary NMOS output; drives S-side of piezo transducer |
| 14 HRNEN | Horn enable | Activates horn oscillation only if VO > brown-out threshold |
| 15 FEED | Piezo feedback input | Connects to piezo feedback electrode; enables resonance tracking and efficiency optimization |
| 16 LBOUT | Low-battery logic output | Pulls to VREG when LBST high and VDD < threshold; signals host MCU |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-mode boost converter | Switches between 4V (low-load) and 10V (alarm) VO outputs to extend battery life while ensuring loud audible alerts |
| Selectably regulated VREG | 3.0V or 3.3V output with ±50mV load regulation supports legacy and modern low-voltage MCUs without external regulators |
| Resonant piezo horn driver | HORNB/HORNS complementary outputs + FEED feedback enable precise frequency-matched drive for maximum acoustic output and efficiency |
| Low-battery signaling with auto-boost | LBST/LBSET configuration and LBOUT output provide early warning and automatic transition to high-boost mode before system failure |
| Ultra-low quiescent current | 7–10.5 µA standby current enables >5-year operation on CR123A or AA batteries in intermittent-alarm applications |
Applications
| Smoke Detectors | CO Detectors |
|---|---|
Use Scenario: Standby monitoring with periodic self-test and loud alarm activation upon smoke detection. IC Role / Device Role / Timing Role: RE46C107E16F provides regulated 3.3V supply to MCU, boosts VO to 10V for high-SPL piezo horn, and signals low battery via LBOUT. Use Value: Eliminates need for separate boost IC, LDO, and horn driver - reducing BOM count and PCB area by >40% versus discrete solution. | Use Scenario: Low-power electrochemical CO sensor interface with audible alarm triggered at hazardous gas concentration. IC Role / Device Role / Timing Role: RE46C107E16F delivers stable 3.0V supply (REGSEL=VSS) to analog front-end, drives piezo horn at 10V, and disables horn below VO brown-out threshold to prevent false alarms. Use Value: Brown-out protection ensures horn only sounds when sufficient energy remains for full-volume alert, improving reliability certification compliance. |
| Personal Security Alarms | Electronic Toys |
Use Scenario: Handheld panic button device requiring instant loud alarm and long shelf life. IC Role / Device Role / Timing Role: RE46C107E16F uses FEED feedback to tune horn drive frequency to mechanical resonance, maximizing volume per mA drawn from coin cell. Use Value: Resonant drive increases acoustic output by ≥6dB versus fixed-frequency drive, enabling smaller piezo elements and thinner enclosures. | Use Scenario: Battery-powered interactive toy with LED flash and beep feedback on button press. IC Role / Device Role / Timing Role: RE46C107E16F powers MCU from VREG, pulses LED via LEDEN/LED, and generates tone via HORNB/HORNS with FEED-based frequency lock. Use Value: Single-chip integration reduces assembly cost and eliminates risk of mismatched boost/LDO/horn timing in multi-IC designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar piezoelectric horn driver and voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RE46C108E16F | Same pinout and function but includes integrated temperature-compensated low-battery reference; Vlbat tolerance tighter (±25mV vs ±150mV) | Preferred for UL-certified smoke alarms requiring tighter battery monitoring accuracy | Choose RE46C108E16F when regulatory compliance mandates sub-50mV low-battery threshold variation across temperature |
| TPS61099YFFR | Standalone boost converter only (no regulator, horn driver, or LB detection); 1.8–5.5V input, 5V/10V output; 1.2µA IQ | Requires external LDO, horn driver, and comparator; suitable for custom designs needing higher VO current or different topology | Choose TPS61099YFFR only when full system customization is required and BOM cost reduction is secondary to performance tuning |
Compared with RE46C108E16F, the RE46C107E16F offers broader low-battery threshold tolerance and lower cost for non-certified applications; versus TPS61099YFFR, it delivers complete signal-chain integration - eliminating four external ICs and reducing layout complexity, test time, and qualification effort.
Availability
RE46C107E16F is available at Aetrix Electronics and suitable for smoke detectors, CO detectors, and personal security products requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for RE46C107E16F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
R&E International, acquired by Microchip Technology in 2007, specializes in ultra-low-power analog and mixed-signal ICs for safety-critical and battery-operated systems.
The RE46C107E16F belongs to Microchip's RE46C family of integrated alarm SoCs, designed specifically for single-chip audio alert generation and power management in life-safety and portable electronic devices.
FAQ
What is the maximum continuous output current capability of the RE46C107E16F horn driver?
The RE46C107E16F horn driver (HORNB/HORNS pins) supports continuous operating current up to 40mA per output, with guaranteed VOL ≤0.5V at 16mA load and VO = 10V. Peak pulsed currents exceed 1A during boost switching, but sustained horn drive must remain within the 40mA limit to ensure thermal stability and long-term reliability.
How does the FEED pin function in the RE46C107E16F piezoelectric horn driver?
The FEED pin on the RE46C107E16F connects to the feedback electrode of a two-terminal piezoelectric transducer. It enables closed-loop frequency tracking by sensing mechanical resonance, allowing the internal oscillator to lock to the transducer's natural frequency for maximum acoustic output and efficiency. If unused, FEED must be tied to VSS.
Can the RE46C107E16F operate from a 2.0V supply, and what are the implications?
Yes, the RE46C107E16F operates down to 2.0V VDD per Absolute Maximum Ratings and Electrical Characteristics. At 2.0V, VO output drops to ~8.5V (min), brown-out threshold remains active at ~3.2V, and quiescent current stays near 10.5µA. However, inductor and interconnect resistance must be ≤0.3Ω total to sustain full-load 10V boost, requiring careful PCB layout and low-ESR capacitors.
What is the purpose of the VSS2 pin on the RE46C107E16F, and how should it be connected?
VSS2 on the RE46C107E16F is the dedicated source terminal of the internal NMOS boost switch. It must be connected to the battery negative terminal through a low-resistance, low-inductance path - separate from digital VSS if possible - to minimize voltage drop and switching losses. Sharing VSS2 and VSS without proper routing risks reduced VO efficiency and thermal instability during high-current boost cycles.
Does the RE46C107E16F support both 3.0V and 3.3V microcontroller supplies simultaneously?
No, the RE46C107E16F provides a single VREG output set to either 3.0V (REGSEL = VSS) or 3.3V (REGSEL = VDD); it cannot deliver both voltages concurrently. The selection is static and determined at power-up. For systems requiring dual regulated rails, an external LDO or second RE46C107E16F would be needed - though most target applications use one MCU voltage standard per design.
RE46C107E16F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Horn Driver
- Input Type:
- Logic
- Output Type:
- Logic
- Current - Supply:
- 14 µA
- Operating Temperature:
- 0°C ~ 50°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
RE46C107E16F FAQ
1.How can I place an order for RE46C107E16F through Aetrix?
Please submit a Request for Quotation (RFQ) for RE46C107E16F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RE46C107E16F reliable?
The price and inventory of RE46C107E16F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RE46C107E16F is usually 5 days.
3.What payment methods are accepted for RE46C107E16F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RE46C107E16F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RE46C107E16F?
RE46C107E16F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RE46C107E16F order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RE46C107E16F?
For technical support, including RE46C107E16F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RE46C107E16F requirements.
6.How does Aetrix verify that RE46C107E16F is sourced from the original manufacturer or authorized distributors?
All RE46C107E16F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RE46C107E16F meets industry standards.
7.What is the process for return or replacement of RE46C107E16F?
All RE46C107E16F units undergo pre-shipment inspection (PSI). If there is an issue with RE46C107E16F, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RE46C107E16F part is unused and in its original packaging.
Return procedure for RE46C107E16F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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