TPS3307-18QDRQ1

Texas Instruments TPS3307-18QDRQ1 automotive triple‑voltage supervisor overview

The Texas Instruments TPS3307-18QDRQ1 is an AEC‑Q100 automotive‑qualified, triple‑voltage supervisor designed to monitor three power rails and generate clean reset signals to ensure reliable system startup and brownout protection. Part of the TPS3307‑Q1 series, this device integrates typical threshold monitoring at 1.25 V, 1.68 V, and 2.93 V and provides both active‑low and active‑high reset outputs—giving designers flexibility when interfacing with a broad range of MCUs, SoCs, FPGAs, and power‑management trees.

Housed in a compact SOIC‑8 (D) package and supplied in Tape & Reel (orderable code suffix DR), the TPS3307-18QDRQ1 fits seamlessly into automotive ECUs, industrial controllers, and transportation systems where robustness, predictable resets, and wide‑temperature performance are required.

• Brand/manufacturer: Texas Instruments (TI)
• Series: TPS3307‑Q1
• Category: Supervisory Circuits / Reset ICs
• Monitored thresholds (typ): 1.25 V / 1.68 V / 2.93 V
• Number of supervised rails: 3
• Reset outputs: Active‑low and active‑high
• Qualification: Automotive AEC‑Q100 (Q1)
• Package: SOIC‑8 (D), Tape & Reel (DR)
• Mounting: Surface‑mount
• Operating temperature range: −40°C to +125°C

Resources:

• Product page: https://www.ti.com/product/TPS3307-18-Q1
• Datasheet: https://www.ti.com/lit/ds/symlink/tps3307-18-q1.pdf

What the TPS3307-18QDRQ1 does—and why it matters

Power rail integrity directly affects every digital system’s reliability. If a processor or ASIC begins execution before its supplies are in range—or if a momentary droop occurs during operation—undefined behavior or data corruption can follow. The Texas Instruments TPS3307-18QDRQ1 addresses this risk by continuously supervising three rails and asserting resets whenever a rail falls below its typical threshold. Once voltages recover, its complementary reset outputs simplify clean, deterministic release of the system from reset.

• Multi‑rail coverage: Three independent channels supervise rails commonly associated with 1.5 V, 1.8 V, and 3.3 V domains (typical thresholds 1.25 V, 1.68 V, and 2.93 V, respectively).
• Flexible integration: Both active‑low and active‑high reset signals are available, easing connection to devices with different reset‑polarity requirements.
• Automotive readiness: AEC‑Q100 qualification and a −40°C to +125°C operating range support harsh‑environment designs.
• Small footprint: The SOIC‑8 package minimizes board cost and routing complexity while delivering automotive‑grade robustness.

The result is a simple, low‑overhead way to harden embedded platforms against brownouts, slow ramps, or sequencing anomalies—without resorting to complex discrete logic or firmware workarounds.

Key features and benefits

Triple‑voltage supervision with targeted thresholds

• Typical thresholds: 1.25 V, 1.68 V, 2.93 V
• Supports power trees built around common digital rails (for example, 1.5 V, 1.8 V, 3.3 V domains)
• Helps ensure processors, memory, and transceivers are only released from reset when rails are in a known‑good range

Dual reset polarity for easy interfacing

• Provides both active‑low and active‑high reset outputs
• Simplifies connection to diverse processors and PMICs without external inversion
• Reduces component count and potential timing asymmetries associated with external glue logic

Automotive‑qualified reliability

• AEC‑Q100 (Q1) qualification
• −40°C to +125°C temperature range
• Suited for ECUs, body electronics, powertrain, and ADAS subsystems where continuous operation and clean resets are mandatory

Compact, manufacturable form factor

• SOIC‑8 (D) package for straightforward assembly and inspection
• Tape & Reel (DR) for automated high‑volume production

Detailed specifications (from provided data)

• Manufacturer/Brand: Texas Instruments
• Series: TPS3307‑Q1
• MPN: TPS3307-18QDRQ1 (orderable variant); base device family TPS3307‑18‑Q1
• Category: Supervisory Circuits / Reset ICs
• Number of supervised rails: 3
• Monitored thresholds (typ): 1.25 V / 1.68 V / 2.93 V
• Reset outputs: Active‑low and active‑high
• Automotive qualification: AEC‑Q100 (Q1)
• Operating temperature range: −40°C to +125°C
• Package: SOIC‑8 (D)
• Packaging: Tape & Reel (DR)
• Mounting: Surface‑mount
• Pin count: 8

Not specified in provided data; consult the datasheet for:

• Supply voltage range
• Threshold accuracy and hysteresis
• Reset propagation delay, timeout, and release behavior
• Input leakage, output drive characteristics
• Pinout and recommended typical application circuits

Applications and use cases

• Automotive ECUs and control modules: Powertrain, body control, and chassis electronics benefit from deterministic resets across multiple rails during cold crank, load dump recovery, or transient events.
• General‑purpose multi‑rail MCU/SoC reset: Supervises processors, memory, and I/O domains in embedded controllers, gateways, sensors, and communications modules.
• Industrial and transportation systems: Elevators, HVAC, motor drives, and railway subsystems where robust power supervision over wide temperature is essential.

Design‑in considerations

Mapping thresholds to your rails

• 2.93 V typical threshold aligns with 3.3 V logic domains.
• 1.68 V typical threshold aligns with many 1.8 V rails.
• 1.25 V typical threshold is useful for low‑core‑voltage domains (commonly associated with 1.5 V systems).
• Verify your system’s minimum operating voltages and tolerance budgets against the supervisor’s threshold and accuracy specifications (see datasheet) to ensure proper margining.

Reset polarity and system architecture

• Use the active‑low reset output for devices expecting an active‑low reset pin; likewise connect the active‑high reset output to devices requiring an asserted‑high signal.
• Keep reset nets short and well‑routed to minimize noise pickup and ensure crisp edges.

Layout and assembly tips

• Place a local bypass capacitor near the device’s supply pin to reduce supply ripple coupling into threshold detection (capacitance value: not specified in provided data; follow datasheet guidance).
• Route supervised rails cleanly to the monitor pins and avoid coupling from high‑slew signals.
• The SOIC‑8 (D) package is easy to rework and inspect—use standard footprints and follow TI’s package drawing recommendations.

Lifecycle, availability, and alternates

• Lifecycle status: Active (per provided data)
• Original component manufacturer: Texas Instruments
• Approved alternates: None listed in the provided data

Substitution guidance:

• If evaluating potential alternates within or beyond the TPS3307‑Q1 family, verify threshold compatibility, the number of supervised rails, and reset polarity requirements before substitution. Pay particular attention to threshold accuracy, timing, and pinout as these parameters are critical to system behavior.
• Policy note: “Verify threshold compatibility and reset polarity before substitution.”

Compliance and reliability

• AEC‑Q100: Automotive Q1 qualified, suitable for automotive environments
• RoHS: Lead‑free, RoHS compliant

These credentials support adoption in regulated markets that require traceability and robust qualification, including automotive and certain industrial segments.

Why choose TI’s TPS3307-18QDRQ1 for your next design?

• Reduced risk at startup and during brownouts: Reliable reset assertion/de‑assertion across multiple rails protects against undefined processor states.
• Fewer external components: Integrated dual‑polarity reset outputs minimize logic glue and reduce BOM line items.
• Designed for harsh environments: AEC‑Q100 qualification and extended temperature range make it a strong fit for automotive and rugged industrial electronics.
• Straightforward sourcing: A single SOIC‑8 (D) package option (Tape & Reel DR) streamlines procurement and assembly processes.

Practical selection checklist

Before committing to the Texas Instruments TPS3307-18QDRQ1 in your schematic, confirm the following:

• Your three supervised rails map appropriately to the 2.93 V, 1.68 V, and 1.25 V typical thresholds.
• Your downstream devices accept the available reset polarities (active‑low and/or active‑high) and levels.
• Environmental requirements match the −40°C to +125°C operating range.
• Compliance needs (AEC‑Q100, RoHS) are met.
• Any timing expectations in your system—such as reset hold times during slow ramps—are compatible with the device’s specifications in the datasheet.

Purchasing and sourcing notes

• Part number (orderable): TPS3307-18QDRQ1
• Family/series: TPS3307‑Q1
• Package: SOIC‑8 (D); packaging code DR indicates Tape & Reel for automated assembly
• Reference resources:
• Product page: https://www.ti.com/product/TPS3307-18-Q1
• Datasheet: https://www.ti.com/lit/ds/symlink/tps3307-18-q1.pdf
• TI quality and compliance documentation: https://www.ti.com/quality/docs/quality-policies-procedures.html

Pricing varies by volume and region; consult Texas Instruments or authorized distribution. For long‑lifecycle applications, consider placing NCNR orders aligned with build schedules, and confirm lead times with your supply chain.

Frequently asked questions (FAQs)

What supply rails does the TPS3307-18QDRQ1 monitor?

It supervises three rails with typical thresholds of 1.25 V, 1.68 V, and 2.93 V (commonly used for 1.5 V, 1.8 V, and 3.3 V systems).

Are both active‑low and active‑high reset signals available?

Yes. The device provides both active‑low and active‑high reset outputs for flexible system integration.

Is the device suitable for automotive use?

Yes. It is AEC‑Q100 qualified (Q1) and specified for operation from −40°C to +125°C.

What package does the TPS3307-18QDRQ1 come in?

An SOIC‑8 (D) package, delivered in Tape & Reel (DR) for automated assembly.

Is the TPS3307-18QDRQ1 RoHS compliant?

Yes. It is lead‑free and RoHS compliant.

Where can I find the official documentation?

See the Texas Instruments product page and datasheet:

• Product page: https://www.ti.com/product/TPS3307-18-Q1
• Datasheet: https://www.ti.com/lit/ds/symlink/tps3307-18-q1.pdf

Summary

The Texas Instruments TPS3307-18QDRQ1 is an automotive‑qualified, triple‑voltage supervisor that consolidates three rail monitors and dual‑polarity reset outputs in a compact SOIC‑8 package. With typical thresholds at 1.25 V, 1.68 V, and 2.93 V, it aligns naturally with common 1.5 V, 1.8 V, and 3.3 V domains, helping designers achieve clean, predictable system initialization. Its AEC‑Q100 qualification, −40°C to +125°C rating, and RoHS compliance make it an excellent fit for ECUs, industrial controllers, and transportation systems where reliability is paramount. For specifications not covered here—such as timing parameters and threshold accuracy—consult the TI datasheet to finalize design margins and ensure seamless integration.