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Analog Devices Inc. LTC2914IGN-1#TRPBF
- Part No.:
- LTC2914IGN-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2914IGN-1#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16SSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2914IGN-1#TRPBF 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 systems. It features ±1.5% threshold accuracy over temperature, 62 µA quiescent current, latching OV output, and support for both positive and negative voltage monitoring via three-state SEL pin. Used in desktop/notebook computers and network servers for core/I/O rail supervision.
For engineers reviewing the LTC2914IGN-1#TRPBF datasheet, LTC2914IGN-1#TRPBF pinout, LTC2914IGN-1#TRPBF application, or LTC2914IGN-1#TRPBF equivalent, key selection criteria include guaranteed UV/OV assertion at VCC ≥ 1V, adjustable reset timeout via external capacitor, buffered 1V reference for negative rail sensing, and latching OV behavior specific to the -1 variant.
Technical Context
The LTC2914IGN-1#TRPBF implements four independent comparator pairs (VHn/VLn), each comparing input voltages against a common 500 mV internal threshold referenced to a buffered 1V reference. Its three-state SEL pin selects polarity configuration for inputs 3 and 4, enabling dual negative voltage monitoring without external components.
It integrates a shunt-regulated VCC input (6.6 V typical), glitch-filtered comparators with 50–500 µs propagation delay, and open-drain UV/OV outputs with weak internal pull-ups to VCC and strong active-low sink capability. The LATCH pin enables OV output latching, distinguishing it from the -2 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VCC = 2.3 V to 6 V; operates as shunt regulator above 6 V with external current-limiting resistor |
| Threshold Accuracy | ±1.5% over full temperature range (–40°C to +85°C), ensuring reliable trip points for 5 V / 3.3 V / 2.5 V / 1.8 V rails |
| Quiescent Current | 62 µA typical, enabling micropower system-level supervision without significant load on monitored supplies |
| Reference Output | Buffered 1 V ±15 mV (–40°C to +125°C), capable of sourcing/sinking ±1 mA for precision negative-rail divider biasing |
| UV/OV Timeout | Adjustable 6–14 ms via external CTMR capacitor (e.g., 1 nF yields 8.5 ms), providing configurable reset pulse width after fault clearance |
| Input Voltage Range | VHn/VLn tolerate –0.3 V to +7.5 V, supporting direct connection to negative supplies when configured with SEL |
| Output Type | Open-drain UV and OV with weak internal pull-up to VCC and strong sink (2.5 mA @ 0.3 V VOL), enabling wired-OR reset bus implementation |
Pinout & Package
Package: 16-Lead Plastic SSOP (GN), 0.65 mm pitch, operating temperature range –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VH1–VH4 | High-side voltage monitor inputs | Trigger UV when below 0.5 V (positive rail) or OV when below 0.5 V (negative rail, per SEL state) |
| VL1–VL4 | Low-side voltage monitor inputs | Trigger OV when above 0.5 V (positive rail) or UV when above 0.5 V (negative rail, per SEL state) |
| VCC | Supply input with internal shunt regulator | Accepts 2.3–6 V directly; >6 V requires series resistor to limit ICC ≤ 10 mA |
| GND | Device ground reference | Common return for all analog and digital circuitry; exposed pad not present in SSOP |
| UV / OV | Open-drain logic outputs | UV asserts low on any undervoltage condition; OV latches low on overvoltage (LTC2914-1); both have weak pull-up to VCC |
| REF | Buffered 1 V reference output | Stable, low-noise reference for negative-rail divider networks; drives up to 1 nF capacitive load |
| TMR | Reset timeout timing control | Connect external capacitor to GND for adjustable delay; tie to VCC to bypass timeout |
| LATCH | OV latch clear/bypass control | Pull low to latch OV; pull high to clear latch and enable timeout-based OV behavior |
| SEL | Three-state polarity select | Connect to VCC/GND/open to configure VH3/VL3 and VH4/VL4 for positive/negative monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV monitoring | Four VH/VL input pairs enable simultaneous supervision of 4 distinct rails (e.g., 5 V, 3.3 V, 2.5 V, 1.8 V) with shared UV/OV outputs |
| Latching OV output (-1 variant) | OV remains asserted until explicitly cleared via LATCH pin, preventing transient-induced false release in noisy environments |
| Negative voltage monitoring capability | SEL pin configures two input pairs for negative rail sensing using internal 1 V REF, eliminating need for external level-shifting circuitry |
| Glitch-immune comparator architecture | Integrated low-pass filtering on each comparator output prevents spurious resets from short-duration noise transients |
| Guaranteed operation down to VCC = 1 V | UV asserts and OV pulls weakly high even at 1 V supply, enabling early power-up detection and brownout protection |
Applications
| Desktop Computer Power Management | Notebook Computer Core Rail Monitoring |
|---|---|
Use Scenario: Supervising 12 V, 5 V, 3.3 V, and 1.8 V rails during boot, runtime, and thermal throttling events. IC Role / Device Role / Timing Role: LTC2914IGN-1#TRPBF acts as centralized voltage supervisor, asserting system reset if any rail deviates beyond ±10% tolerance. Use Value: ±1.5% threshold accuracy ensures precise trip points across –40°C to +85°C, reducing false resets and improving system uptime. | Use Scenario: Monitoring CPU core (1.0 V), GPU (1.2 V), memory (1.5 V), and I/O (3.3 V) supplies in space-constrained mobile platforms. IC Role / Device Role / Timing Role: LTC2914IGN-1#TRPBF provides compact quad-rail supervision with latching OV to prevent premature wake-up from voltage spikes. Use Value: 62 µA quiescent current minimizes battery drain during sleep states, while adjustable TMR timeout accommodates varying rail stabilization times. |
| Network Server I/O Voltage Monitoring | Industrial Embedded Controller Supply Integrity |
Use Scenario: Verifying integrity of PCIe slot 3.3 V, SATA 5 V, management controller 3.3 V, and auxiliary 12 V rails in redundant server backplanes. IC Role / Device Role / Timing Role: LTC2914IGN-1#TRPBF serves as fault-detection node feeding watchdog logic, with latched OV signaling persistent overvoltage faults requiring service intervention. Use Value: Open-drain UV/OV outputs allow wired-OR connection to single system reset line, simplifying board-level integration and reducing component count. | Use Scenario: Ensuring stable 24 V DC input, isolated 5 V logic, 3.3 V microcontroller, and 1.8 V FPGA core supplies in programmable logic controllers. IC Role / Device Role / Timing Role: LTC2914IGN-1#TRPBF monitors critical rails and asserts hardware reset before firmware initialization, preventing corrupted state transitions. Use Value: Buffered 1 V REF enables accurate negative monitoring of isolated –5 V analog sensor supplies without external op-amps or references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-18-33-30 | Triple-supply monitor (1.8 V / 3.3 V / 3.0 V fixed thresholds); no negative rail support; no latching OV | Fixed thresholds only; lacks SEL-configurable polarity and REF output for negative monitoring | Select when only standard positive rails require supervision and board space is extremely constrained |
| MAX6816CUA+ | Single-channel supervisor with manual reset; no quad monitoring; no adjustable timeout or negative rail capability | Requires four separate ICs to match LTC2914IGN-1#TRPBF functionality; higher BOM cost and layout area | Select only for legacy designs where pin compatibility with MAX6816 footprint is mandatory |
Compared with TPS3307-18-33-30 and MAX6816CUA+, the LTC2914IGN-1#TRPBF delivers integrated quad monitoring, ±1.5% accuracy over temperature, latching OV, and native negative rail support - reducing component count, improving fault coverage, and enabling compact, robust power integrity solutions.
Availability
LTC2914IGN-1#TRPBF is available at Aetrix Electronics and suitable for desktop computers, notebook computers, and network servers requiring stable component supply with industrial temperature grade (–40°C to +85°C) and long-term availability.
Supply support for LTC2914IGN-1#TRPBF 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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2914 product line was developed by Linear Technology specifically for precision, low-power, multi-rail voltage supervision in computing and communications infrastructure, emphasizing accuracy, flexibility, and reliability under wide temperature and supply conditions.
FAQ
What is the operating temperature range for the LTC2914IGN-1#TRPBF?
The LTC2914IGN-1#TRPBF is rated for operation from –40°C to +85°C, as indicated by the "I" grade in the part number and confirmed in the Absolute Maximum Ratings table. This industrial temperature range supports deployment in demanding computing and networking environments where ambient temperatures exceed commercial limits.
How does the SEL pin affect input polarity on the LTC2914IGN-1#TRPBF?
The SEL pin on the LTC2914IGN-1#TRPBF is a three-state input that configures the polarity of VH3/VL3 and VH4/VL4. When tied to VCC, both pairs monitor positive voltages; when grounded, both monitor negative voltages; when left open, VH3/VL3 monitor positive and VH4/VL4 monitor negative. This eliminates external resistors for polarity selection.
Does the LTC2914IGN-1#TRPBF support monitoring negative supply voltages?
Yes, the LTC2914IGN-1#TRPBF supports monitoring negative supply voltages using its buffered 1 V reference (REF pin) and configurable VH/VL inputs. With SEL set to GND or open, VHn triggers OV and VLn triggers UV for negative rails - enabling accurate –5 V, –3.3 V, or –2.5 V supervision without external level shifters.
What is the function of the LATCH pin on the LTC2914IGN-1#TRPBF?
The LATCH pin on the LTC2914IGN-1#TRPBF controls the overvoltage output behavior: pulling it low causes OV to latch low upon detection and remain asserted until LATCH is pulled high. When held high, OV behaves like UV - asserting low during fault and releasing after timeout. This distinguishes LTC2914IGN-1#TRPBF from the -2 variant.
Can the LTC2914IGN-1#TRPBF operate with a supply voltage below 2.3 V?
Yes, the LTC2914IGN-1#TRPBF guarantees UV assertion and OV weak pull-up operation down to VCC = 1 V, though full comparator functionality (VHn/VLn monitoring) activates only above VCC = 2 V. This enables early power-up detection and brownout protection in low-voltage systems.
LTC2914IGN-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC2914IGN-1#TRPBF FAQ
1.How can I place an order for LTC2914IGN-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2914IGN-1#TRPBF 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 LTC2914IGN-1#TRPBF reliable?
The price and inventory of LTC2914IGN-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2914IGN-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2914IGN-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2914IGN-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2914IGN-1#TRPBF?
LTC2914IGN-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2914IGN-1#TRPBF 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 LTC2914IGN-1#TRPBF?
For technical support, including LTC2914IGN-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2914IGN-1#TRPBF requirements.
6.How does Aetrix verify that LTC2914IGN-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2914IGN-1#TRPBF 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 LTC2914IGN-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2914IGN-1#TRPBF?
All LTC2914IGN-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2914IGN-1#TRPBF, 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 LTC2914IGN-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2914IGN-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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