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LTC2907IDDB#TRMPBF - Linear Technology

Name: Linear Technology LTC2907IDDB#TRMPBF
Brand: Linear Technology
SKU: LTC2907IDDB#TRMPBF
Price: 0.75 USD
Availability: InStock
Rating: 5 (4 reviews)

Manufacturer Part Number: LTC2907IDDB#TRMPBF

Manufacturer: Linear Technology

Allelco Part Number: 41D-LTC2907IDDB#TRMPBF

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 10,370 pcs available, New & Original

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Category: Integrated Circuits (ICs) > Specialized ICs

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Quantity	Unit Price	Ext. Price
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Specifications

LTC2907IDDB#TRMPBF Tech Specifications
Linear Technology - LTC2907IDDB#TRMPBF technical specifications, attributes, parameters and parts with similar specifications to Linear Technology - LTC2907IDDB#TRMPBF

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Part Number	LTC2907IDDB#TRMPBF
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Parts Introduction

Manufacturer Part Number

LTC2907IDDB#TRMPBF

Manufacturer

Analog Devices

Introduction

The LTC2907IDDB#TRMPBF is a multi-voltage supervisor that monitors up to 2 independent voltage rails. It provides an active-low reset output and can be used in a wide range of applications where monitoring of multiple supply voltages is required.

Product Features and Performance

Monitors up to 2 independent voltage rails

Adjustable voltage thresholds (2.5V, 3.3V, 5V, or adjustable)

Active-low reset output

Minimum reset timeout of 140ms

Wide operating temperature range of -40°C to 85°C

Surface mount package (8-WFDFN Exposed Pad)

Product Advantages

Versatile voltage monitoring for reliable system operation

Adjustable thresholds provide flexibility for various application needs

Compact surface mount package saves board space

Wide temperature range supports a variety of environments

Key Reasons to Choose This Product

Comprehensive voltage monitoring for enhanced system reliability

Flexible threshold settings for adaptability to different system requirements

Reliable reset functionality to ensure proper system startup and operation

Small footprint package allows for space-constrained designs

Quality and Safety Features

Robust design for reliable performance

Compliance with applicable safety and regulatory standards

Compatibility

This product is compatible with a wide range of electronic systems and devices that require multi-voltage supervision and monitoring.

Application Areas

Industrial automation and control systems

Telecommunications equipment

Automotive electronics

Medical devices

General-purpose electronics with multiple supply voltages

Product Lifecycle

The LTC2907IDDB#TRMPBF is an active product, and there are no plans for discontinuation at this time. Analog Devices may offer alternative or equivalent models in the future, but details on such products are not available. If you have any specific questions or require further information, please contact our website's sales team.

Frequently Asked Questions(FAQ)

What are the key performance trade-offs when selecting the LTC2907IDDB#TRMPBF for a dual-voltage monitoring application in an automotive-grade system?: The LTC2907IDDB#TRMPBF offers precise monitoring of two independent voltage rails with thresholds at 2.5V, 3.3V, 5V, and an adjustable option, making it suitable for mixed-voltage systems. However, its open-drain or open-collector output configuration requires external pull-up resistors to define logic levels, which introduces design constraints in low-voltage environments where rail compatibility is critical. Additionally, while the device operates reliably from -40°C to 85°C, exceeding this range—such as in harsh automotive conditions—may compromise timing accuracy and reset signal integrity. Engineers must also consider the 140ms minimum reset timeout, which may be insufficient for certain microcontrollers requiring longer power stabilization periods, potentially leading to premature resets during power-up sequences.

How does the LTC2907IDDB#TRMPBF compare to the LTC2906IDDB#TRMPBF in terms of channel count and threshold flexibility?: While both devices share the same base product number and package type (8-DFN), the LTC2907IDDB#TRMPBF monitors two voltages with four fixed threshold options—2.5V, 3.3V, 5V, and adjustable—whereas the LTC2906 typically supports one monitored voltage with similar threshold choices. This makes the LTC2907 more appropriate for systems requiring concurrent supervision of multiple power domains, such as FPGA core and I/O supplies. However, the LTC2906 may offer lower quiescent current in single-supply designs, trading versatility for efficiency. Selection between them should reflect whether dual-rail monitoring justifies any additional power budget.

What design considerations arise when using the LTC2907IDDB#TRMPBF’s adjustable threshold in a battery-powered embedded device?: When configuring the adjustable threshold on the LTC2907IDDB#TRMPBF for a battery-powered application, precise resistor selection becomes critical due to internal reference tolerances and temperature drift. For instance, using standard 1% tolerance resistors may result in threshold errors exceeding ±50mV over the operating temperature range, potentially causing false resets during deep discharge or missed undervoltage events near cutoff. Engineers should perform worst-case analysis across supply variations and validate behavior with actual prototypes. Additionally, the open-drain output necessitates careful layout to avoid noise coupling into sensitive control lines, especially in space-constrained PCBs.

Can the LTC2907IDDB#TRMPBF safely interface directly with 3.3V logic without level shifting?: Yes, the LTC2907IDDB#TRMPBF can interface directly with 3.3V logic provided the pull-up resistor to VCC does not exceed 3.3V. Since the output is open-drain or open-collector, it will only sink current and cannot source voltage above the supply rail connected to the pull-up. Therefore, connecting the RESET pin through a 10kΩ resistor to a 3.3V microcontroller GPIO works effectively. However, if the supervisor is powered from a higher voltage (e.g., 5V) but controls a 3.3V logic input, additional precautions like clamping diodes or bidirectional buffers may be needed to prevent reverse current flow, unless the logic input has built-in ESD protection rated for 5V tolerance.

What impact does the 140ms minimum reset timeout have on system initialization in a multi-stage boot sequence?: The 140ms minimum reset timeout of the LTC2907IDDB#TRMPBF sets a floor on how long the reset line remains asserted after an undervoltage condition clears. In complex systems with slow-start peripherals or large memory controllers, this delay might be too short to ensure full stability before releasing reset. For example, some DDR memory modules require up to 200ms after power stabilization before initialization completes. Using the LTC2907 in such cases could lead to corrupted boot states unless supplemented with an RC network or another supervisory IC that extends the reset pulse. Alternatively, firmware-based delay routines can compensate, but increase software complexity and boot time.

Is the LTC2907IDDB#TRMPBF suitable for use in a medical device requiring strict regulatory compliance beyond basic RoHS?: The LTC2907IDDB#TRMPBF meets RoHS3 compliance and is unaffected by REACH regulations, which supports general environmental standards. However, medical device certification (e.g., IEC 60601) involves additional requirements such as electrical safety, electromagnetic compatibility (EMC), fault tolerance, and lifecycle traceability. While the component itself contributes to functional safety, final system validation must include isolation barriers, redundant monitoring paths, and failure mode analysis. The device’s MSL rating of 1 allows unlimited shelf life under dry storage, beneficial for long-term inventory management in regulated industries, but does not imply medical grade qualification on its own.

How should PCB layout affect the reliability of reset signaling when using the LTC2907IDDB#TRMPBF?: Due to the open-drain nature of the LTC2907IDDB#TRMPBF outputs, parasitic inductance and capacitance in the RESET trace can distort signal edges and introduce ringing, particularly in noisy industrial environments. To minimize these effects, keep the pull-up resistor close to the supervisor package and route the RESET line away from high-speed signals. A 10nF capacitor between the RESET line and ground can filter glitches but must be sized carefully to avoid slowing down response time below acceptable limits. Additionally, placing vias along the return path should be avoided to prevent impedance discontinuities that degrade signal integrity, especially at frequencies above 1MHz where transient disturbances may occur.

Can the LTC2907IDDB#TRMPBF monitor a negative voltage rail?: No, the LTC2907IDDB#TRMPBF is designed for positive voltage monitoring only. Its input pins have absolute maximum ratings tied to the supply voltage and do not support reverse polarity or negative inputs. Attempting to monitor a negative rail would violate electrical specifications and risk damaging the device. For systems requiring negative supply supervision (e.g., op-amp circuits powered from ±15V rails), alternative solutions such as resistive dividers combined with dedicated negative-supervisor ICs or comparator-based circuits are required. The LTC2907’s architecture assumes unipolar operation within its defined input range.

What happens if both monitored voltages fall below threshold simultaneously?: If both channels of the LTC2907IDDB#TRMPBF detect undervoltage conditions concurrently, the RESET output will assert regardless of which threshold was crossed first. Since the device lacks priority logic, it responds to the combined state of both inputs, ensuring that any loss of power on either rail triggers a system reset. This behavior is intentional for fail-safe operation but means that individual channel status cannot be discerned without external multiplexing. Designers relying on diagnostic feedback may need to add comparators or digital isolators to distinguish between primary and secondary rail failures.

Does the LTC2907IDDB#TRMPBF include built-in hysteresis to prevent chatter near threshold boundaries?: No, the LTC2907IDDB#TRMPBF does not incorporate internal hysteresis in its threshold detection circuitry. As a result, rapid oscillations near the trip point—caused by ripple or noise on the monitored rail—can cause repeated resets even when the average voltage is stable. In applications with moderate noise (e.g., switching regulators), this may manifest as spurious reboots. External hysteresis can be implemented using Schmitt trigger buffers or RC networks at the input, though care must be taken not to mask legitimate undervoltage events. For clean power domains, the lack of hysteresis is acceptable; for noisy ones, additional filtering is advised.

How does the choice of pull-up resistor value affect power consumption and response time in a battery-operated system using the LTC2907IDDB#TRMPBF?: The pull-up resistor value directly influences both standby current draw and the rise time of the RESET signal. A lower resistance (e.g., 1kΩ) draws more current but ensures faster assertion of the reset line under fault conditions, beneficial for preventing brownout scenarios. Conversely, a higher value (e.g., 100kΩ) reduces leakage current significantly, improving battery life in idle modes. However, excessive resistance increases RC time constant with parasitic capacitance, delaying reset release and potentially violating timing requirements of downstream ICs. Typical values range from 4.7kΩ to 10kΩ for most applications balancing speed and efficiency, though exact selection depends on total load capacitance and acceptable delay margins.

Is there a recommended decoupling strategy for the LTC2907IDDB#TRMPBF to ensure stable operation under transient loads?: Yes, stable operation of the LTC2907IDDB#TRMPBF requires proper decoupling at both the VCC pin and across each monitored input if they originate from noisy sources. Place a 0.1µF ceramic capacitor as close as possible to the VDD pin to suppress high-frequency noise affecting internal references. If the monitored rails experience rapid transients (e.g., from digital switching), local bulk capacitance (e.g., 10µF tantalum) near the power source helps stabilize the input seen by the supervisor. Avoid long traces between the supervisor and decoupling caps, as inductance can reduce effectiveness during fast current spikes. These measures ensure accurate threshold comparison and reliable reset generation despite dynamic load changes.

Can the LTC2907IDDB#TRMPBF be used in parallel with other reset generators to create a voting logic scheme?: Technically, multiple reset sources can be OR-ed together to form a composite reset signal, but doing so with the LTC2907IDDB#TRMPBF requires attention to output configuration. Since its reset output is open-drain, connecting several such devices in parallel creates a wired-AND logic only if all outputs are open-drain and share a common pull-up. However, this topology risks contention if one device drives low while others remain high, potentially stressing outputs. Worse, if any supervisor is active-high, mixing types breaks the logic. For robust redundancy, use identical devices and validate that their thresholds align appropriately. Voting schemes are better handled by microcontroller-based logic or dedicated watchdog/supervisor hybrids unless strict analog simplicity is mandated.

What is the significance of the exposed pad in the 8-DFN package of the LTC2907IDDB#TRMPBF for thermal and electrical performance?: The exposed pad on the LTC2907IDDB#TRMPBF serves dual purposes: it provides a low-inductance path to ground for improved noise immunity and acts as a thermal interface to dissipate heat from internal junctions. Although power dissipation is minimal (<1mW), proper soldering of the pad to a ground plane enhances signal integrity by reducing ground bounce and improves long-term reliability under thermal cycling. It also facilitates easier heat spreading in densely populated boards, indirectly supporting consistent threshold accuracy by minimizing junction-to-ambient temperature gradients. Failure to connect or solder the pad adequately degrades both electrical performance and mechanical robustness, especially in vibration-prone environments.

How does the moisture sensitivity level (MSL) rating of 1 influence handling and storage practices for the LTC2907IDDB#TRMPBF in high-volume manufacturing?: With an MSL rating of 1, the LTC2907IDDB#TRMPBF is classified as non-hazardous regarding moisture absorption, meaning it can withstand reflow soldering without pre-baking under normal storage conditions. This simplifies inventory management and reduces handling steps compared to components with higher MSL ratings. However, even MSL-1 parts benefit from dry packaging and climate-controlled warehousing to maintain shelf life beyond typical production cycles. Manufacturers should still adhere to IPC/JEDEC J-STD-033 guidelines for handling trays or reels, avoiding prolonged exposure to humid atmospheres (>60% RH) before assembly, especially after opening primary packaging, to prevent condensation during thermal processing.

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Customer Reviews

Evaluation: 10 Articles

Arch***ct

Jul 15, 2026

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.
FPGA***lorer88

Jul 7, 2026

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.
Nath***oleman

Jun 29, 2026

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.
Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.

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Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

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