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Analog Devices Inc. LTC2914HDHC-2#PBF
- Part No.:
- LTC2914HDHC-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2914HDHC-2#PBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2914HDHC-2#PBF from Analog Devices (formerly Linear Technology) is a quad-input undervoltage/overvoltage supervisor IC designed for simultaneous monitoring of four independent supply rails in high-reliability embedded systems. It features ±1.5% threshold accuracy over –40°C to +125°C, 62µA quiescent current, adjustable reset timeout via external capacitor, and dual-polarity support (positive/negative voltage monitoring) using a buffered 1V reference. Used in industrial computing and automotive power management where extended temperature operation is critical.
For engineers reviewing the LTC2914HDHC-2#PBF datasheet, LTC2914HDHC-2#PBF pinout, LTC2914HDHC-2#PBF application, or LTC2914HDHC-2#PBF equivalent, this page delivers verified specifications, validated pin functions, confirmed negative-supply monitoring capability, exact DFN-16 (5mm × 3mm) package mapping, and two technically documented alternative parts with functional and application-level distinctions.
Technical Context
The LTC2914HDHC-2#PBF implements four independent comparator pairs (VHn/VLn), each configurable for positive or negative rail monitoring via the three-state SEL pin. Thresholds are referenced to a precision 1V buffered output with ±0.5% variation over temperature, enabling accurate UV/OV detection across all inputs.
It integrates a programmable timeout generator (TMR pin) with 6–14ms range at CTMR = 1nF, and includes DIS pin functionality that disables both UV and OV outputs when pulled high-distinguishing it from the latching LTC2914-1 variant. Guaranteed operation down to VCC = 1V ensures robust power-up sequencing in low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct supply; internal 6.6V shunt regulator enables operation up to 16V with series resistor |
| Threshold Accuracy | ±1.5% over full –40°C to +125°C range - ensures reliable trip points without recalibration |
| Quiescent Current | 62µA typical - enables always-on monitoring in battery-backed or ultra-low-power systems |
| Reference Output | 1.000V ±15mV buffered reference - drives ≤1mA load and supports negative-rail offset configuration |
| UV/OV Delay | 50–500µs propagation delay - provides noise immunity against short transients without hysteresis |
| Reset Timeout Range | 6–14ms with 1nF capacitor - adjustable timing ensures sufficient system settling after fault clearance |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and high-temp computing |
Pinout & Package
Package: 16-lead plastic DFN (5mm × 3mm), exposed pad (Pin 17), RoHS-compliant, lead-free finish. Thermal resistance θJA = 43.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VH1–VH4 (Pins 1,3,5,7) | High-side voltage input | Triggers UV if below 0.5V (positive mode) or OV if below 0.5V (negative mode, per SEL state) |
| VL1–VL4 (Pins 2,4,6,8) | Low-side voltage input | Triggers OV if above 0.5V (positive mode) or UV if above 0.5V (negative mode, per SEL state) |
| VCC (Pin 16) | Power supply input | Operates as direct supply (≤6V) or shunt-regulated input (>6V); UVLO active below 2.0V |
| GND (Pin 9) | Ground reference | Primary return path for all analog and digital circuitry; exposed pad may be connected to GND |
| UV / OV (Pins 12, 11) | Open-drain logic outputs | Assert low on fault; weak internal pull-up to VCC; compatible with wired-OR configurations |
| REF (Pin 10) | Buffered reference output | Stable 1V source for negative-rail divider biasing; sinks/sources ±1mA; stable up to 1nF capacitive load |
| TMR (Pin 15) | Timeout timer control | Connects to external capacitor (≥10pF) to set reset pulse width; tie to VCC to bypass timeout |
| SEL (Pin 14) | Polarity selection input | Three-state logic (GND/VCC/open) configures VH3/VL3 and VH4/VL4 for positive or negative monitoring |
| DIS (Pin 13) | Output disable control | Pull high to force UV/OV outputs into high-impedance state - unique to -2 variant; internal 2µA pull-down |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV monitoring | Four VH/VL input pairs enable simultaneous supervision of 5V, 3.3V, 2.5V, and 1.8V rails without external comparators |
| Negative voltage monitoring support | SEL-configurable polarity + 1V REF allows accurate –5V, –3.3V, or other negative rail monitoring using standard resistive dividers |
| Adjustable reset timeout | External capacitor on TMR pin sets precise 6–1000ms reset pulse width - eliminates need for discrete RC timing networks |
| Glitch-immune comparator architecture | Integrated low-pass filtering on each input rejects <500ns transients - prevents false resets without adding threshold hysteresis error |
| Extended temperature grade | Rated for –40°C to +125°C operation - meets AEC-Q100 Grade 1 requirements for automotive power domain monitoring |
Applications
| Server Power Sequencing | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Monitoring 12V, 5V, 3.3V, and 1.8V rails during cold-start and load-dump conditions in rack-mounted network servers. IC Role / Device Role / Timing Role: Quad UV/OV supervisor providing synchronized reset assertion and adjustable timeout to coordinate FPGA, CPU, and memory power-up sequences. Use Value: ±1.5% threshold accuracy ensures deterministic reset behavior across temperature; DIS pin allows firmware-controlled reset inhibition during safe-mode entry. | Use Scenario: Supervising safety-critical 5V, 3.3V, and dual 1.2V supplies powering radar SoC, camera ISP, and CAN-FD transceivers in autonomous driving ECUs. IC Role / Device Role / Timing Role: High-temp supervisor validating supply integrity before ASIL-B software initialization; monitors negative bias rails for analog front-ends. Use Value: –40°C to +125°C rating guarantees operation in engine bay environments; buffered 1V REF enables accurate –2.5V sensor bias monitoring. |
| Industrial PLC Backplane | Medical Imaging Power Subsystem |
Use Scenario: Continuous monitoring of isolated 24V, ±15V, 5V, and 3.3V supplies feeding I/O modules, analog signal chains, and real-time controllers in factory automation systems. IC Role / Device Role / Timing Role: Fault-tolerant voltage monitor detecting brownouts and overvoltages across multiple isolated domains; uses SEL pin to configure dual negative rails. Use Value: 62µA quiescent current minimizes standby power draw; open-drain UV/OV outputs support wired-OR fault-bus architecture across distributed modules. | Use Scenario: Ensuring clean power delivery to X-ray detector ASICs, ADCs, and high-speed serial links in portable ultrasound and MRI subsystems. IC Role / Device Role / Timing Role: Precision supervisor verifying 1.8V, 2.5V, 3.3V, and 5V rails prior to image acquisition; leverages REF output to bias photodiode biasing circuits. Use Value: 1V reference stability (±15mV) enables sub-1% absolute threshold tolerance; glitch rejection prevents spurious resets during EMI-heavy scanning cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2914IDHC-2#PBF | Same functionality and pinout; rated for –40°C to +85°C instead of –40°C to +125°C | Suitable for commercial/industrial ambient environments but not under-hood or high-temp enclosure use | Select when full automotive-grade temperature range is unnecessary and cost optimization is prioritized |
| TPS3307-33DGNR | Triple-channel supervisor (not quad); fixed 3.3V UV/OV thresholds; no negative rail support; no adjustable timeout | Limited to single-rail or triple-rail monitoring with fixed thresholds; lacks SEL, REF, and DIS functionality | Choose only for simpler, lower-cost designs requiring basic 3.3V rail supervision without configurability |
Compared with LTC2914IDHC-2#PBF, the LTC2914HDHC-2#PBF adds guaranteed operation at +125°C for harsh environments; compared with TPS3307-33DGNR, it delivers full quad monitoring, polarity flexibility, and programmable timing - making it suitable for complex, multi-rail safety-critical systems where thermal margin and design adaptability are essential.
Availability
LTC2914HDHC-2#PBF is available at Aetrix Electronics and suitable for industrial control, automotive ADAS, medical imaging, and high-reliability server applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2914HDHC-2#PBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2914 product line delivers precision, low-power, multi-rail voltage supervision ICs optimized for mission-critical power integrity validation in space-constrained, thermally demanding systems - with variants spanning commercial to automotive-grade temperature ranges.
FAQ
What is the operating temperature range of the LTC2914HDHC-2#PBF?
The LTC2914HDHC-2#PBF is specified for continuous operation from –40°C to +125°C, making it suitable for under-hood automotive, industrial control, and high-temperature computing applications. This H-grade qualification exceeds standard industrial temperature limits and aligns with AEC-Q100 Grade 1 requirements for reliability in demanding thermal environments. The LTC2914HDHC-2#PBF maintains ±1.5% threshold accuracy across this full range.
How does the DIS pin function on the LTC2914HDHC-2#PBF?
The DIS (Disable) pin on the LTC2914HDHC-2#PBF is a dedicated control input that, when pulled high, forces both UV and OV outputs into a high-impedance state - effectively disabling fault reporting regardless of input conditions. It features an internal 2µA pull-down, so leaving it unconnected defaults to normal operation. This functionality distinguishes the LTC2914HDHC-2#PBF from the -1 variant and enables firmware-controlled reset suppression during safe-mode transitions or diagnostic routines.
Can the LTC2914HDHC-2#PBF monitor negative voltages, and how is it configured?
Yes, the LTC2914HDHC-2#PBF can monitor negative voltages using its buffered 1V reference (REF pin) and three-state SEL pin. When SEL is grounded, VH3/VL3 and VH4/VL4 are configured for negative monitoring: VHn triggers OV when below 0.5V, and VLn triggers UV when above 0.5V. This allows accurate supervision of rails such as –5V or –3.3V using standard resistive dividers referenced to REF. The LTC2914HDHC-2#PBF's ±1.5% threshold accuracy applies equally to negative-rail configurations.
What is the purpose of the TMR pin on the LTC2914HDHC-2#PBF?
The TMR (Timer) pin on the LTC2914HDHC-2#PBF sets the reset timeout period by connecting an external capacitor to ground. With CTMR = 1nF, the timeout is 6–14ms over temperature; larger capacitors extend the pulse width linearly (≈9ms/nF). Tying TMR to VCC bypasses the timeout entirely, causing UV/OV to deassert immediately upon fault clearance. This adjustable timing ensures system stability by guaranteeing minimum reset pulse duration after supply recovery - a key requirement in FPGA and microprocessor power sequencing.
Does the LTC2914HDHC-2#PBF require external components for basic operation?
The LTC2914HDHC-2#PBF requires minimal external components: a 0.1µF bypass capacitor on VCC is mandatory, and a timing capacitor on TMR is needed if adjustable reset timeout is used. For voltage monitoring, external resistor dividers are required on each VH/VL pair to scale input rails to the 0.5V internal threshold. No external pull-ups are needed on UV/OV due to internal weak pull-ups, though an external ≤100kΩ pull-up is recommended on OV if operation below VCC = 1.5V is required. The LTC2914HDHC-2#PBF integrates all comparators, reference, and logic - eliminating discrete supervisors.
LTC2914HDHC-2#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC2914HDHC-2#PBF FAQ
1.How can I place an order for LTC2914HDHC-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2914HDHC-2#PBF 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 LTC2914HDHC-2#PBF reliable?
The price and inventory of LTC2914HDHC-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2914HDHC-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC2914HDHC-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2914HDHC-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2914HDHC-2#PBF?
LTC2914HDHC-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2914HDHC-2#PBF 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 LTC2914HDHC-2#PBF?
For technical support, including LTC2914HDHC-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2914HDHC-2#PBF requirements.
6.How does Aetrix verify that LTC2914HDHC-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2914HDHC-2#PBF 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 LTC2914HDHC-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC2914HDHC-2#PBF?
All LTC2914HDHC-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2914HDHC-2#PBF, 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 LTC2914HDHC-2#PBF part is unused and in its original packaging.
Return procedure for LTC2914HDHC-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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