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Analog Devices Inc. LTC2914CGN-2#TRPBF
- Part No.:
- LTC2914CGN-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2914CGN-2#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
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Product details
Overview
LTC2914CGN-2#TRPBF from Analog Devices (formerly Linear Technology) is a quad-input, adjustable UV/OV supply monitor IC designed for simultaneous monitoring of four independent voltage rails in power management systems. It supports both positive and negative voltage monitoring via polarity-selectable inputs, features ±1.5% threshold accuracy over temperature, 62µA quiescent current, and open-drain UV/OV outputs with adjustable reset timeout. It is used in desktop/notebook computers and network servers for core/I/O rail supervision.
For engineers reviewing the LTC2914CGN-2#TRPBF datasheet, LTC2914CGN-2#TRPBF pinout, LTC2914CGN-2#TRPBF application, or LTC2914CGN-2#TRPBF equivalent, this page provides verified functional specifications, validated pin roles, confirmed package mapping to 16-lead SSOP, real-world timing behavior, and two technically documented alternative parts for multi-rail voltage supervision designs.
Technical Context
The LTC2914CGN-2#TRPBF implements four independent comparator pairs (VHn/VLn), each configurable for positive or negative rail monitoring using a three-state SEL pin. All comparators share a common 0.5V internal reference offset, with threshold accuracy guaranteed at ±1.5% across 0°C to 70°C operating range.
It integrates an adjustable timeout generator (TMR pin, CTMR ≥10pF), UVLO protection activating below 1.9V VCC, and output disable functionality via DIS pin - a defining feature of the "-2" variant that forces UV/OV high regardless of fault conditions, unlike the latching "-1" version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 6V direct supply; >6V requires external series resistor due to internal 6.6V shunt regulator. |
| Threshold Accuracy | ±1.5% over full temperature range - ensures reliable trip points for 5V/3.3V/2.5V/1.8V rails without recalibration. |
| Quiescent Current | 62µA typical - enables always-on monitoring in low-power embedded and portable systems. |
| Input Voltage Range | VHn/VLn tolerate –0.3V to 7.5V - supports monitoring of negative supplies (e.g., –5V) when paired with REF output. |
| Reset Timeout | Adjustable from 6ms to 14ms via CTMR capacitor (e.g., 1nF → 8.5ms); TMR pin can be tied to VCC to bypass. |
| Output Type | Open-drain UV/OV with weak internal pull-up to VCC and strong pull-down - enables wired-OR reset bus sharing. |
| Operating Temp | 0°C to 70°C (C-grade) - qualified for commercial computing and industrial control environments. |
Pinout & Package
Package: 16-lead plastic SSOP (GN), 5.3mm × 6.2mm body, exposed pad not present (DFN variant has exposed pad; SSOP does not).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VH1–VH4 | High-side voltage input (n = 1–4) | Triggers UV if below 0.5V (positive rail) or OV if below 0.5V (negative rail, per SEL state). |
| VL1–VL4 | Low-side voltage input (n = 1–4) | Triggers OV if above 0.5V (positive rail) or UV if above 0.5V (negative rail, per SEL state). |
| SEL | Three-state polarity select | Configures V3/V4 as positive or negative monitors: tied to VCC/GND/open selects one of three polarity modes. |
| DIS | Output disable control (LTC2914-2 only) | Pulling high disables UV/OV assertion entirely - critical for controlled power sequencing or test mode isolation. |
| TMR | Timeout timer capacitor connection | External CTMR sets reset pulse width; tie to VCC to eliminate delay - enables flexible reset timing without firmware. |
| UV / OV | Open-drain logic outputs | Assert low on fault; weak pull-up allows shared reset bus; VOL ≤0.15V at VCC = 1V ensures valid logic under brownout. |
| REF | Buffered 1.0V reference output | Sources/sinks ±1mA; drives ≤1nF capacitive load - used as offset for negative rail divider networks. |
| VCC / GND | Supply and ground | VCC operates as shunt-regulated input above 6V; requires ≥0.1µF bypass capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV monitoring | Simultaneously supervises four distinct rails (e.g., 5V, 3.3V, 2.5V, 1.8V) with single-chip footprint savings. |
| Adjustable trip thresholds | Configurable via external resistor dividers - supports custom UV/OV points beyond standard 10% tolerance rails. |
| Negative voltage monitoring capability | Uses REF output + SEL pin to monitor rails like –5V or –12V without external op-amps or level shifters. |
| Glitch-immune comparator inputs | Integrated low-pass filtering prevents false resets from transient noise on monitored supplies. |
| UVLO with hysteresis | Undervoltage lockout activates at 2.0V VCC with 25mV hysteresis - ensures clean startup/shutdown sequencing. |
Applications
| Desktop Computer Power Sequencing | Notebook System Rail Supervision |
|---|---|
|
Use Scenario: Monitoring 5V, 3.3V, 2.5V, and 1.8V core/I/O rails during cold boot and thermal throttling events. IC Role / Device Role / Timing Role: Quad UV/OV supervisor asserting system reset until all rails stabilize within ±10% tolerance. Use Value: Prevents CPU/Memory corruption by enforcing strict power-good timing with 62µA quiescent draw. |
Use Scenario: Supervising battery-backed 3.3V, 1.8V, DDR termination, and PCIe auxiliary rails in ultrabook platforms. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete supervisors - DIS pin enables firmware-controlled reset suspension during sleep/wake transitions. Use Value: Reduces BOM count and PCB area while maintaining ±1.5% threshold accuracy across 0°C–70°C ambient. |
| Network Server Core Voltage Monitoring | Industrial Embedded Controller Power Integrity |
|
Use Scenario: Validating 12V, 5V, 3.3V, and 1.2V FPGA/GPU domain supplies in 1U rack servers with hot-swap capability. IC Role / Device Role / Timing Role: Detects undervoltage on any rail and holds reset active for user-adjustable timeout (via TMR capacitor) to allow supply settling. Use Value: Eliminates need for external RC timing networks - improves long-term reliability vs. discrete solutions. |
Use Scenario: Ensuring stable operation of ARM-based PLC controllers powered from unregulated 24V DC with local LDOs. IC Role / Device Role / Timing Role: Monitors both positive (3.3V I/O) and negative (–5V analog) rails using same device - SEL pin configures polarity without hardware change. Use Value: Enables dual-polarity supervision in space-constrained enclosures without adding second IC or redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6814EAP+ | 4-channel UV/OV monitor with fixed 5V/3.3V/2.5V/1.8V thresholds; no negative rail support; 100µA IQ. | Lacks polarity selection and REF output - unsuitable for mixed-signature systems requiring –5V monitoring. | Select when only standard positive rails need supervision and board space permits higher IQ. |
| TPS3307-18DGNR | Dual-channel UV/OV monitor (not quad); supports 1.8V/3.3V rails only; no TMR timeout adjustment; 25µA IQ. | Requires two devices to match LTC2914CGN-2#TRPBF's quad capability - increases layout complexity and cost. | Choose only for simplified dual-rail designs where timeout flexibility and negative monitoring are unnecessary. |
Compared with MAX6814EAP+ and TPS3307-18DGNR, the LTC2914CGN-2#TRPBF uniquely delivers quad-channel supervision with negative rail capability, adjustable timeout, and sub-100µA quiescent current - making it the only option for compact, multi-polarity, thermally robust computing power management.
Availability
LTC2914CGN-2#TRPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial embedded controllers requiring stable component supply with guaranteed 0°C to 70°C operation and long-term obsolescence planning.
Supply support for LTC2914CGN-2#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, communications, and industrial markets.
The LTC2914 product line delivers highly accurate, low-power voltage supervision ICs optimized for multi-rail computing and server platforms where reliability, small footprint, and configurable thresholds are critical.
FAQ
What is the key functional difference between LTC2914CGN-2#TRPBF and LTC2914CGN-1#TRPBF?
The LTC2914CGN-2#TRPBF includes a DIS (disable) pin that forces both UV and OV outputs high regardless of input faults - enabling firmware-controlled reset suspension. In contrast, the LTC2914CGN-1#TRPBF uses the same pin as LATCH for OV output latching, making it unsuitable for applications requiring dynamic reset inhibition. This distinction is hardwired in silicon and cannot be altered by configuration.
Can LTC2914CGN-2#TRPBF monitor negative voltages, and how is it implemented?
Yes, LTC2914CGN-2#TRPBF monitors negative voltages using its buffered 1.0V REF output as an offset reference and the three-state SEL pin to configure VHn/VLn polarity. When SEL is grounded, V3 and V4 inputs are set for negative monitoring: VHn triggers OV when below 0.5V (i.e., more negative than threshold), and VLn triggers UV when above 0.5V (i.e., less negative). This eliminates need for external level-shifting circuitry.
What is the minimum VCC voltage required for LTC2914CGN-2#TRPBF to assert valid UV/OV outputs?
LTC2914CGN-2#TRPBF guarantees UV low and OV high assertion down to VCC = 1V. However, full comparator operation (VHn/VLn input validity) begins only when VCC exceeds 2.0V (UVLO threshold). Below 2.0V, the device enters undervoltage lockout - UV remains asserted low while OV is blocked - ensuring deterministic behavior during brownout conditions.
How does the TMR pin function in LTC2914CGN-2#TRPBF, and what capacitor value yields a 200ms timeout?
The TMR pin sets reset timeout via external capacitor CTMR to GND; timeout ≈ 9ms/nF (e.g., 1nF → 9ms). For 200ms, CTMR ≈ 22.2nF - matching the 22nF value shown in the Typical Application schematic. Tying TMR to VCC bypasses timeout entirely, causing immediate UV/OV deassertion after fault clearance. Capacitor leakage must stay below 1.3µA to maintain accuracy.
Is LTC2914CGN-2#TRPBF RoHS-compliant and lead-free, and what is its moisture sensitivity level?
Yes, LTC2914CGN-2#TRPBF carries "#TRPBF" suffix indicating lead-free (Pb-free), RoHS-compliant finish and tape-and-reel packaging. Per Analog Devices' packaging documentation, the 16-lead SSOP (GN) package has Moisture Sensitivity Level (MSL) 1 - unlimited floor life at ≤30°C/85% RH, requiring no baking prior to reflow soldering.
LTC2914CGN-2#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC2914CGN-2#TRPBF FAQ
1.How can I place an order for LTC2914CGN-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2914CGN-2#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 LTC2914CGN-2#TRPBF reliable?
The price and inventory of LTC2914CGN-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2914CGN-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2914CGN-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2914CGN-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2914CGN-2#TRPBF?
LTC2914CGN-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2914CGN-2#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 LTC2914CGN-2#TRPBF?
For technical support, including LTC2914CGN-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2914CGN-2#TRPBF requirements.
6.How does Aetrix verify that LTC2914CGN-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2914CGN-2#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 LTC2914CGN-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2914CGN-2#TRPBF?
All LTC2914CGN-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2914CGN-2#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 LTC2914CGN-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC2914CGN-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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