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Analog Devices Inc. LTC2914HGN-1#PBF
- Part No.:
- LTC2914HGN-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2914HGN-1#PBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:270
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Product details
Overview
LTC2914HGN-1#PBF from Analog Devices (formerly Linear Technology) is a quad-input undervoltage/overvoltage supervisor IC designed for simultaneous monitoring of four independent power rails in high-reliability systems. It features ±1.5% threshold accuracy over –40°C to +125°C, 62 µA quiescent current, adjustable reset timeout via external capacitor, and support for both positive and negative voltage monitoring using a buffered 1V reference. It is used in industrial-grade server power management and core I/O voltage supervision.
For engineers reviewing the LTC2914HGN-1#PBF datasheet, LTC2914HGN-1#PBF pinout, LTC2914HGN-1#PBF application, or LTC2914HGN-1#PBF equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, confirmed thermal performance limits, and validated alternative options - all specific to the H-grade SSOP variant with latching OV output.
Technical Context
The LTC2914HGN-1#PBF implements four independent comparator pairs (VHn/VLn), each configurable for positive or negative rail monitoring via a three-state SEL pin. All comparators share a common 0.5 V internal threshold referenced to a buffered 1 V REF output, enabling precise ratio-based trip points across temperature.
Its UV and OV outputs are open-drain with weak internal pull-ups to VCC and strong active-low drive capability; the LTC2914-1 variant includes latching OV behavior controlled by the LATCH pin, while TMR pin sets timeout delay (6–14 ms typical with 1 nF) before output release after fault clearance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 6 V supply; internal 6.6 V shunt regulator enables operation up to 6 V directly or higher with series resistor. |
| Threshold Accuracy | ±1.5% over –40°C to +125°C - ensures reliable trip point stability without recalibration in harsh environments. |
| Quiescent Current | 62 µA typical - enables always-on supervision in low-power industrial and automotive subsystems. |
| Input Voltage Range | VHn/VLn tolerate –0.3 V to +7.5 V - supports direct monitoring of negative rails down to –5 V with proper divider design. |
| Operating Temp | –40°C to +125°C - qualified for extended-temperature industrial and under-hood applications. |
| Reset Timeout | Adjustable 6–14 ms (–40°C to +125°C) via CTMR capacitor - provides deterministic minimum reset pulse width for processor initialization. |
| Reference Output | 1.000 V ±15 mV buffered REF - drives up to ±1 mA and stabilizes negative-rail monitoring circuits without external references. |
Pinout & Package
Package: 16-Lead Plastic SSOP (GN), 5.0 mm × 6.2 mm, exposed pad optional, θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VH1–VH4 | High-side voltage inputs | Trigger UV when below 0.5 V (positive rail) or OV when below 0.5 V (negative rail); polarity set by SEL. |
| VL1–VL4 | Low-side voltage inputs | Trigger OV when above 0.5 V (positive rail) or UV when above 0.5 V (negative rail); polarity set by SEL. |
| VCC | Supply input / shunt regulator | Accepts 2.3–6 V directly; >6 V requires series resistor to limit ICC ≤10 mA; UVLO activates below 2.0 V. |
| GND | Device ground reference | Return path for all internal circuitry and REF output; must be low-impedance for accurate thresholding. |
| UV / OV | Open-drain logic outputs | UV asserts low on any undervoltage condition; OV asserts low on any overvoltage condition; both have weak pull-up to VCC. |
| REF | Buffered 1 V reference output | Sources/sinks ±1 mA; drives resistive dividers for negative-rail monitoring; stable to 1 nF capacitive load. |
| TMR | Timeout timer control | Connect external capacitor (≥10 pF) to GND to set delay; tie to VCC to bypass timeout entirely. |
| SEL | Three-state polarity select | Connect to VCC/GND/open to configure VH3/VL3 and VH4/VL4 as positive/positive, positive/negative, or negative/negative monitors. |
| LATCH | OV latch clear/bypass | Pull low to latch OV on first fault; pull high to clear latch and enable standard timeout behavior (LTC2914-1 function). |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV monitoring | Simultaneously supervises four distinct power rails (e.g., 5 V, 3.3 V, 2.5 V, 1.8 V) with shared UV/OV outputs - reduces BOM count and board space vs discrete supervisors. |
| ±1.5% threshold accuracy over temp | Guaranteed across full –40°C to +125°C range - eliminates need for derating or margining in high-temperature industrial designs. |
| Negative voltage monitoring support | Uses internal 1 V REF and SEL pin to configure VH/VL pairs for –5 V, –12 V, or other negative rails - avoids external op-amps or level shifters. |
| Adjustable reset timeout | Capacitor-programmable delay (6–14 ms) ensures sufficient reset hold time for microcontrollers and FPGAs after power stabilization. |
| Glitch-immune comparator inputs | Integrated low-pass filtering rejects transients <500 µs at 5 mV overdrive - prevents false resets from switching noise or ESD events. |
| Latching OV output (LTC2914-1) | LATCH pin controls persistent OV assertion until manually cleared - critical for fault logging and safety-critical lockout sequences. |
Applications
| Server Power Sequencing | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitoring 12 V, 5 V, 3.3 V, and 1.8 V rails during cold start and brownout conditions in dual-socket rack servers. IC Role / Device Role / Timing Role: LTC2914HGN-1#PBF acts as centralized power-good arbiter, asserting system reset only after all rails stabilize within tolerance for ≥8 ms. Use Value: Prevents CPU lockup or firmware corruption by guaranteeing coordinated power sequencing across multiple voltage domains. |
Use Scenario: Supervising isolated 24 V DC input, 5 V logic, 3.3 V FPGA core, and –5 V analog bias in modular I/O cards operating in factory-floor cabinets. IC Role / Device Role / Timing Role: LTC2914HGN-1#PBF monitors both positive and negative supplies simultaneously using SEL configuration and REF output. Use Value: Enables single-chip supervision of mixed-polarity rails - eliminating need for separate positive/negative supervisors and reducing layout complexity. |
| Automotive ADAS Domain Controller | Medical Imaging Power Subsystem |
|
Use Scenario: Validating 12 V battery-derived rails (5 V, 3.3 V, 1.2 V), including CAN transceiver bias, in autonomous driving ECUs exposed to under-hood temperatures. IC Role / Device Role / Timing Role: LTC2914HGN-1#PBF provides extended-temp supervision with latched OV output to flag overvoltage faults during load dump events. Use Value: Supports ASIL-B functional safety requirements by delivering deterministic fault detection and persistent alert signaling without software intervention. |
Use Scenario: Ensuring stable 5 V, 3.3 V, ±15 V, and –5 V supplies powering X-ray detector ASICs and analog front-ends in portable imaging devices. IC Role / Device Role / Timing Role: LTC2914HGN-1#PBF uses its buffered REF and polarity-select capability to supervise negative rails without external components. Use Value: Reduces component count and improves long-term reliability by replacing discrete op-amp-based negative-supply monitors with integrated solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-18-33-50 | Triple-channel (not quad); fixed 1.8 V/3.3 V/5.0 V thresholds; no negative rail support; 12-lead SOIC package. | Only suitable for fixed-rail, single-polarity systems; lacks SEL/REF for flexible negative monitoring. | Select only if monitoring exactly three standard positive rails and board space allows larger SOIC footprint. |
| MAX6816CUA+ | Quad-channel but only UV detection; no OV capability; ±2% threshold accuracy; 8-lead µMAX package. | Cannot detect overvoltage faults - unsuitable for systems requiring overvoltage protection (e.g., load dump, regulator failure). | Choose only for cost-sensitive, UV-only applications where OV detection is not required and 8-pin footprint is acceptable. |
Compared with TPS3307-18-33-50 and MAX6816CUA+, the LTC2914HGN-1#PBF uniquely delivers quad UV/OV monitoring with ±1.5% accuracy, negative rail support, and latching OV - making it the only option for compact, high-integrity, mixed-polarity power supervision in extended-temperature environments.
Availability
LTC2914HGN-1#PBF is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS controllers, medical imaging subsystems, and telecom infrastructure requiring stable component supply across extended temperature ranges.
Supply support for LTC2914HGN-1#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, industrial automation, and communications.
The LTC2914 product line delivers highly accurate, low-power, multi-rail voltage supervision ICs optimized for mission-critical power integrity in servers, industrial equipment, and automotive electronics.
FAQ
What is the operating temperature range for the LTC2914HGN-1#PBF?
The LTC2914HGN-1#PBF is rated for –40°C to +125°C ambient operation, matching the H-grade qualification. This extended range is confirmed in the Absolute Maximum Ratings table and applies to all electrical specifications unless otherwise noted. The SSOP package has θJA = 110°C/W, enabling reliable thermal performance in enclosed industrial enclosures without forced airflow.
How does the SEL pin configure polarity for negative voltage monitoring on the LTC2914HGN-1#PBF?
On the LTC2914HGN-1#PBF, the three-state SEL pin selects polarity: tied to GND configures both VH3/VL3 and VH4/VL4 for negative rail monitoring, where VHn triggers OV and VLn triggers UV when the monitored supply becomes more or less negative than the 0.5 V threshold. This eliminates external level-shifting circuitry and leverages the internal 1 V REF for accurate offset generation.
Does the LTC2914HGN-1#PBF support latching overvoltage detection?
Yes - the LTC2914HGN-1#PBF is the "-1" variant and includes latching OV functionality. When the LATCH pin is pulled low, the OV output remains asserted low after the first overvoltage event until LATCH is pulled high to clear the latch. This behavior is explicitly defined in the device description and pin function table, distinguishing it from the -2 variant which disables outputs instead.
What is the minimum capacitor value required on the TMR pin of the LTC2914HGN-1#PBF?
The LTC2914HGN-1#PBF requires a minimum 10 pF capacitor between TMR and GND to set a valid timeout period. Values below this may cause erratic timing or failure to initiate the timeout delay. The datasheet specifies CTMR ≥10 pF, and typical designs use 1 nF for ~8.5 ms delay at 25°C, scaling linearly per the 9 ms/nF nominal rate.
Can the LTC2914HGN-1#PBF monitor a –12 V rail?
Yes - the LTC2914HGN-1#PBF can monitor –12 V using VH3/VL3 or VH4/VL4 configured for negative polarity via the SEL pin, combined with the buffered 1 V REF output. A properly calculated 3-resistor divider (e.g., RA ≈ 49.9 kΩ, RB ≈ 49.9 kΩ, RC ≈ 1.13 MΩ) ensures VHn and VLn remain within absolute maximum ratings (–0.3 V to +7.5 V) while maintaining ±1.5% threshold accuracy.
LTC2914HGN-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- 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-SSOP
LTC2914HGN-1#PBF FAQ
1.How can I place an order for LTC2914HGN-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2914HGN-1#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 LTC2914HGN-1#PBF reliable?
The price and inventory of LTC2914HGN-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2914HGN-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC2914HGN-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2914HGN-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2914HGN-1#PBF?
LTC2914HGN-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2914HGN-1#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 LTC2914HGN-1#PBF?
For technical support, including LTC2914HGN-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2914HGN-1#PBF requirements.
6.How does Aetrix verify that LTC2914HGN-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2914HGN-1#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 LTC2914HGN-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC2914HGN-1#PBF?
All LTC2914HGN-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2914HGN-1#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 LTC2914HGN-1#PBF part is unused and in its original packaging.
Return procedure for LTC2914HGN-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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