My Inquiry
My Account
Analog Devices Inc. LTC2914IDHC-2#PBF
- Part No.:
- LTC2914IDHC-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2914IDHC-2#PBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,908
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2914IDHC-2#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 temperature, 62µA quiescent current, adjustable reset timeout via external capacitor, and dual-polarity support (positive/negative voltage monitoring) using a buffered 1V reference. It is used in desktop/notebook computers and network servers for core/I/O rail supervision.
For engineers reviewing the LTC2914IDHC-2#PBF datasheet, LTC2914IDHC-2#PBF pinout, LTC2914IDHC-2#PBF application, or LTC2914IDHC-2#PBF equivalent, key selection criteria include guaranteed UV/OV assertion at VCC ≥ 1V, open-drain UV/OV outputs with weak internal pull-ups, polarity-selectable inputs via three-state SEL pin, and DIS pin-based output disable functionality unique to the -2 variant.
Technical Context
The LTC2914IDHC-2#PBF implements four independent comparator pairs (VHn/VLn), each comparing input voltages against a common 0.5V internal threshold referenced to a buffered 1V reference. Its DIS pin (Pin 13) enables full disablement of both UV and OV outputs-unlike the -1 variant's latch functionality-making it suitable for systems requiring controlled reset suppression during power sequencing or firmware-controlled hold-off.
Threshold detection uses low-leakage inputs (±15nA typical), glitch-filtered comparators, and an adjustable timeout timer (TMR pin) that holds UV/OV asserted after fault clearance. The three-state SEL pin selects polarity configuration for inputs VH3/VL3 and VH4/VL4, enabling monitoring of up to two negative supplies without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 6V supply; shunt-regulated operation above 6V with external series resistor |
| Threshold Accuracy | ±1.5% over full temperature range (–40°C to +85°C), ensuring reliable trip points across operating conditions |
| Quiescent Current | 62µA typical, enabling micropower system-level supervision without significant load impact |
| UV/OV Output Type | Open-drain with weak internal pull-up to VCC; supports wired-OR and level-shifting applications |
| Reset Timeout | Adjustable via external CTMR capacitor (e.g., 8.5ms with 1nF); disabled when TMR tied to VCC |
| Input Polarity Control | Three-state SEL pin configures VH3/VL3 & VH4/VL4 for positive or negative supply monitoring |
| DIS Pin Function | High-level assertion disables both UV and OV outputs-core differentiator vs. LTC2914-1 variants |
Pinout & Package
Package: 16-lead (5mm × 3mm) plastic DFN with exposed pad (Pin 17), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VH1 (Pin 1) | Positive-supply undervoltage sense input | Triggers UV when voltage falls below 0.5V threshold; tied to VCC if unused |
| VL1 (Pin 2) | Positive-supply overvoltage sense input | Triggers OV when voltage rises above 0.5V threshold; tied to GND if unused |
| VH2 (Pin 3) | Positive-supply undervoltage sense input | Second independent UV monitor input; identical behavior to VH1 |
| VL2 (Pin 4) | Positive-supply overvoltage sense input | Second independent OV monitor input; identical behavior to VL1 |
| VH3 (Pin 5) | Polarity-configurable voltage sense input | UV or OV trigger depends on SEL state; supports negative-supply monitoring |
| VL3 (Pin 6) | Polarity-configurable voltage sense input | Paired with VH3; polarity determined by SEL pin logic state |
| VH4 (Pin 7) | Polarity-configurable voltage sense input | Third configurable pair; enables fourth monitored rail with polarity flexibility |
| VL4 (Pin 8) | Polarity-configurable voltage sense input | Paired with VH4; completes quad-monitoring capability |
| GND (Pin 9) | Device ground reference | Primary return path; exposed pad (Pin 17) may be connected to GND for thermal performance |
| REF (Pin 10) | Buffered 1V reference output | Sources/sinks ±1mA; used as offset for negative-rail monitoring circuits |
| OV (Pin 11) | Open-drain overvoltage output | Asserts low on any OV condition; disabled when DIS = high |
| UV (Pin 12) | Open-drain undervoltage output | Asserts low on any UV condition; disabled when DIS = high |
| DIS (Pin 13) | Output disable control | High-level signal forces both UV and OV into high-impedance (weak pull-up) state |
| SEL (Pin 14) | Three-state polarity select | Connect to VCC/GND/open to configure VH3/VL3 & VH4/VL4 for +/− monitoring |
| TMR (Pin 15) | Reset timeout timing control | Capacitor-to-GND sets delay; tie to VCC to bypass timeout |
| VCC (Pin 16) | Supply input / shunt regulator | Operates directly up to 6V; regulates higher voltages with external current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV monitoring | Simultaneously supervises four distinct power rails with shared UV/OV outputs |
| ±1.5% threshold accuracy over temperature | Ensures precise trip points across –40°C to +85°C without calibration |
| Configurable polarity via three-state SEL | Enables monitoring of up to two negative supplies without external resistors or op-amps |
| DIS pin output disable | Hardware-controlled suppression of both UV and OV outputs-unique to -2 variant |
| 62µA quiescent current | Minimizes standby power draw in battery-backed or energy-sensitive systems |
| Glitch-immune comparator architecture | Low-pass filtering prevents false triggering from transient noise on monitored rails |
Applications
| Desktop Computer Power Management | Notebook Computer Power Sequencing |
|---|---|
Use Scenario: Monitoring 5V, 3.3V, 2.5V, and 1.8V core/I/O rails during boot and runtime in ATX-compliant motherboards. IC Role / Device Role / Timing Role: Quad UV/OV supervisor providing synchronized reset assertion and timeout-controlled release for multi-rail power domains. Use Value: Eliminates need for four discrete supervisors; ±1.5% accuracy ensures compliance with Intel VRD specifications for rail tolerance margins. | Use Scenario: Coordinating power-up sequence of CPU core, GPU, memory, and peripheral rails in space-constrained laptop designs. IC Role / Device Role / Timing Role: Single-chip supervisor with DIS pin enabling firmware-controlled hold-off of system reset during early BIOS initialization. Use Value: Reduces BOM count and PCB area; DIS functionality allows dynamic reset suppression without software polling or additional logic. |
| Network Server Voltage Supervision | Negative Supply Monitoring in Data Acquisition |
Use Scenario: Ensuring stable operation of 12V, 5V, 3.3V, and 1.2V rails powering CPUs, FPGAs, and PHYs in 1U rack servers. IC Role / Device Role / Timing Role: High-accuracy quad supervisor with glitch rejection preventing spurious resets in electrically noisy server backplanes. Use Value: 62µA quiescent current minimizes idle power; open-drain outputs support wired-OR reset bus architecture across multiple boards. | Use Scenario: Supervising –5V and –12V analog front-end supplies in precision ADC/DAC modules where negative rail integrity is critical. IC Role / Device Role / Timing Role: Dual-negative-rail monitor using REF output and SEL pin to configure VH3/VL3 and VH4/VL4 for –5V and –12V thresholds. Use Value: Buffered 1V reference enables accurate offset-based negative monitoring; eliminates need for external op-amp level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2914IDHC-1#PBF | LATCH pin instead of DIS; provides OV latching (not disable); no output suppression capability | Suitable for systems requiring persistent OV indication until cleared by external signal | Select only if latching behavior is required; not functionally interchangeable due to pin role difference |
| TPS3307-33DGNR | Triple-channel (not quad); fixed 3.3V UV threshold; no negative rail support; no DIS/LATCH pin | Lower channel count; limited to single-rail or stacked-rail monitoring with external dividers | Consider only for simpler, lower-cost 3-rail systems without negative supply needs |
Compared with LTC2914IDHC-1#PBF, the LTC2914IDHC-2#PBF replaces latching with hardware disable-critical for firmware-controlled reset management. Versus TPS3307-33DGNR, it adds a fourth channel, polarity flexibility, and ±1.5% accuracy, justifying use in complex, high-integrity multi-rail systems.
Availability
LTC2914IDHC-2#PBF is available at Aetrix Electronics and suitable for desktop computers, notebook computers, and network servers requiring stable component supply with industrial temperature range support (–40°C to +85°C).
Supply support for LTC2914IDHC-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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2914 product line delivers precision, low-power, multi-rail voltage supervision for computing and communications infrastructure, emphasizing accuracy, configurability, and robustness in thermally demanding environments.
FAQ
What is the operating temperature range for the LTC2914IDHC-2#PBF?
The LTC2914IDHC-2#PBF is specified for operation from –40°C to +85°C, making it suitable for industrial and commercial computing applications where ambient temperatures exceed consumer-grade limits. This rating is confirmed by the "I" grade designation in the part number and validated in the Absolute Maximum Ratings table of the official datasheet.
How does the DIS pin on the LTC2914IDHC-2#PBF function?
The DIS pin (Pin 13) on the LTC2914IDHC-2#PBF disables both UV and OV outputs when driven high. When active, it forces both outputs into a high-impedance state with only the weak internal pull-up active-distinct from the LATCH pin on the -1 variant. This allows firmware or system logic to suppress reset generation during known transients or initialization phases without altering the monitored rail states.
Can the LTC2914IDHC-2#PBF monitor negative voltages?
Yes, the LTC2914IDHC-2#PBF can monitor up to two negative voltages using its buffered 1V reference (REF pin) and three-state SEL pin to configure VH3/VL3 and VH4/VL4 inputs. When SEL is grounded, both pairs monitor negative supplies: VHn triggers OV when voltage becomes more negative than threshold, and VLn triggers UV when less negative-enabling accurate –5V or –12V supervision without external level-shifting circuitry.
What is the minimum VCC voltage required for valid operation of the LTC2914IDHC-2#PBF?
The LTC2914IDHC-2#PBF guarantees UV and OV output functionality down to VCC = 1V, per the Electrical Characteristics table. At this level, VOL remains ≤0.15V for UV under 100µA sink current. However, full comparator operation (VHn/VLn input validity) begins at VCC ≥ 2V, with UVLO releasing at VCC > 2.1V maximum. This low-VCC capability supports brown-out detection during deep power-down sequences.
How is the reset timeout period set on the LTC2914IDHC-2#PBF?
The reset timeout period on the LTC2914IDHC-2#PBF is set by connecting an external capacitor (CTMR) between the TMR pin (Pin 15) and GND. The timeout scales linearly: tUOTO ≈ 9ms/nF (e.g., 8.5ms with 1nF). Tying TMR to VCC bypasses the timer entirely. Capacitor leakage must stay below 1.3µA to maintain accuracy, and minimum value is 10pF per datasheet specification.
LTC2914IDHC-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC2914IDHC-2#PBF FAQ
1.How can I place an order for LTC2914IDHC-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2914IDHC-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 LTC2914IDHC-2#PBF reliable?
The price and inventory of LTC2914IDHC-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 LTC2914IDHC-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC2914IDHC-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2914IDHC-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2914IDHC-2#PBF?
LTC2914IDHC-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2914IDHC-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 LTC2914IDHC-2#PBF?
For technical support, including LTC2914IDHC-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2914IDHC-2#PBF requirements.
6.How does Aetrix verify that LTC2914IDHC-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2914IDHC-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 LTC2914IDHC-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC2914IDHC-2#PBF?
All LTC2914IDHC-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2914IDHC-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 LTC2914IDHC-2#PBF part is unused and in its original packaging.
Return procedure for LTC2914IDHC-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2914IDHC-2#PBF Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
