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Analog Devices Inc. LTC2912CTS8-1#TRPBF
- Part No.:
- LTC2912CTS8-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912CTS8-1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,469
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Product details
Overview
LTC2912CTS8-1#TRPBF from Analog Devices is a single-channel UV/OV voltage monitor IC in TSOT-23-8 package, designed for precise power supply supervision with ±1.5% threshold accuracy, 29µA quiescent current, and adjustable 6–14ms reset timeout via external capacitor. It operates from 2.3V to 6V supply or higher (e.g., 12V/24V/48V) using internal shunt regulation and supports latch-controlled OV output for reliable system reset in desktop computers and network servers.
For engineers reviewing the LTC2912CTS8-1#TRPBF datasheet, LTC2912CTS8-1#TRPBF pinout, LTC2912CTS8-1#TRPBF application, or LTC2912CTS8-1#TRPBF equivalent, key selection considerations include its latch-enabled OV output behavior, guaranteed operation down to VCC = 1V, open-drain UV/OV outputs with weak internal pull-ups, and compatibility with 3-resistor divider configurations for custom UV/OV trip points on 3.3V ±10% or 5V ±10% rails.
Technical Context
The LTC2912CTS8-1#TRPBF implements dual comparators with low-pass filtering on VH and VL inputs to reject transient glitches, ensuring noise-immune undervoltage and overvoltage detection. Its internal 6.5V shunt regulator enables direct connection to high-voltage supplies when paired with an external series resistor limiting ICC ≤ 10mA.
It features independent UV and OV reset outputs with programmable timeout via TMR pin capacitor (CTMR), where tUOTO = 9ms/nF (typical); the LATCH pin controls OV latching behavior-low enables latched OV output, high bypasses latching and aligns OV timing with UV's timeout delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V with external current-limiting resistor due to internal 6.5V shunt regulator |
| Threshold Accuracy | ±1.5% over full temperature range - ensures tight trip point control for 3.3V ±10% or 5V ±10% supply monitoring |
| Quiescent Current | 29µA typical - enables micropower operation in battery-backed or always-on systems |
| UV/OV Timeout Range | 6ms to 14ms (CTMR = 1nF) - adjustable via external capacitor from 10pF to >1µF for system-specific reset pulse width |
| Input Glitch Immunity | Integrated low-pass filtering on VH/VL inputs - rejects sub-500µs transients without requiring external RC networks |
| Output Type | Open-drain UV and OV with weak internal pull-up to VCC - supports wired-OR reset buses and eliminates need for external pull-ups in non-critical rise-time applications |
| Minimum Valid VCC | 1V - guarantees UV assertion and OV state control during brown-out conditions before full power-up |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad not present (unlike DFN variant), θJA = 195°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LATCH (Pin 1) | OV latch clear/bypass control | Pulling high disables latching and makes OV follow UV timing; pulling low enables latched OV output for persistent fault indication |
| UV (Pin 2) | Undervoltage logic output | Open-drain output asserting low when VH input falls below threshold; held low for programmed timeout after recovery |
| OV (Pin 3) | Overvoltage logic output (latched) | Open-drain output asserting low when VL input exceeds threshold; latches low until LATCH pin is pulled high |
| GND (Pin 4) | Device ground reference | Primary return path for internal circuitry and external filter capacitors; must be low-impedance connection |
| TMR (Pin 5) | Reset timeout timer input | Capacitor-connected node setting UV/OV assertion duration; tie to VCC to disable timeout |
| VL (Pin 6) | Overvoltage sense input | Comparator input triggering OV when voltage exceeds 0.5V; connect to low-side tap of resistive divider for positive rail monitoring |
| VH (Pin 7) | Undervoltage sense input | Comparator input triggering UV when voltage falls below 0.5V; connect to high-side tap of resistive divider |
| VCC (Pin 8) | Power supply input | Accepts 2.3V–6V directly; functions as shunt-regulated input above 6V with external series resistor to limit current to ≤10mA |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV trip points | Configurable via external 3-resistor divider - supports custom thresholds for 3.3V ±10%, 5V ±10%, or other rails |
| Glitch-immune comparator inputs | On-chip low-pass filtering rejects transients <500µs - eliminates need for external RC filters and improves reliability in noisy environments |
| Latch-controlled OV output | LATCH pin enables persistent fault flagging - critical for diagnostics in systems requiring manual reset or fault logging |
| Wide-supply operation with shunt regulation | Operates from 12V/24V/48V supplies using internal 6.5V shunt - simplifies BOM by removing external regulators in industrial power systems |
| Guaranteed functionality at low VCC | UV/OV outputs fully functional down to VCC = 1V - ensures robust reset signaling during deep brown-out or power sequencing |
Applications
| Desktop & Notebook Computers | Network Servers |
|---|---|
Use Scenario: Monitoring 3.3V core I/O rail with ±10% tolerance during boot and runtime. IC Role / Device Role / Timing Role: Single UV/OV supervisor providing reset assertion on out-of-tolerance events with 200ms timeout (CTMR = 22nF). Use Value: Prevents CPU lockup or data corruption by ensuring stable 3.3V supply before firmware execution begins. | Use Scenario: Supervising redundant 12V backplane supplies in blade server chassis. IC Role / Device Role / Timing Role: High-voltage-capable monitor using shunt regulation and external dropping resistor to detect undervoltage on 12V rail. Use Value: Enables early fault detection without adding DC/DC converter stages - reduces component count and improves MTBF. |
| Core Voltage Monitors | I/O Voltage Monitors |
Use Scenario: Guarding 1.8V or 2.5V FPGA core supply against droop during high-current switching. IC Role / Device Role / Timing Role: Precision threshold detector with ±1.5% accuracy ensuring trip points remain within 25mV of nominal under temperature variation. Use Value: Avoids false resets caused by thermal drift - critical for mission-critical embedded control applications. | Use Scenario: Validating 5V USB peripheral interface voltage in industrial gateways. IC Role / Device Role / Timing Role: Dual-threshold monitor with independent UV/OV outputs enabling separate fault handling paths for under- and overvoltage events. Use Value: Allows differentiated response - e.g., graceful shutdown on UV vs. immediate disconnect on OV - improving system safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2913IMS8-1#TRPBF | Dual independent UV/OV channels in MSOP-8; same latch behavior and ±1.5% accuracy but adds second monitoring channel | Required when supervising two separate rails (e.g., 3.3V and 1.2V) with identical timing and latch control | Select LTC2913 if board space allows MSOP-8 and dual-rail monitoring is needed - avoids doubling component count |
| LTC2904CMS8-1#TRPBF | 3-state programmable dual supply monitor; adjustable tolerance (±0.5% to ±5%), no latch function, higher ICC (45µA) | Suitable for margin testing where UV/OV thresholds must be dynamically adjusted via external resistors | Choose LTC2904 only if programmable tolerance and non-latching behavior are required - not drop-in compatible |
Compared with LTC2912CTS8-1#TRPBF, LTC2913 offers dual-channel integration at the cost of larger MSOP-8 package and higher price, while LTC2904 trades latch capability and lower ICC for field-adjustable thresholds - making LTC2912CTS8-1#TRPBF optimal for fixed-threshold, latch-required, space-constrained 3.3V/5V supervision.
Availability
LTC2912CTS8-1#TRPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and core/I/O voltage monitoring applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature ranges.
Supply support for LTC2912CTS8-1#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2912 product line delivers precision, low-power voltage supervision ICs optimized for reliable power-good signaling and fault-flagging in computing, server, and embedded systems with strict reset timing and accuracy requirements.
FAQ
What is the operating temperature range for the LTC2912CTS8-1#TRPBF?
The LTC2912CTS8-1#TRPBF is rated for 0°C to 70°C ambient operation (C-grade). This is confirmed in the Order Information table where "CTS8" denotes the commercial temperature range, distinct from "ITS8" (industrial, –40°C to 85°C) and "HTS8" (high-temp, –40°C to 125°C) variants.
How does the LATCH pin affect the OV output behavior of the LTC2912CTS8-1#TRPBF?
When the LATCH pin of the LTC2912CTS8-1#TRPBF is pulled low, the OV output latches low upon overvoltage detection and remains asserted until LATCH is raised high. When LATCH is high, OV behaves like UV - asserting low during fault and releasing after the TMR-set timeout - enabling flexible fault-handling modes in the same device.
Can the LTC2912CTS8-1#TRPBF monitor a 48V supply directly?
Yes - the LTC2912CTS8-1#TRPBF can monitor a 48V supply using its internal VCC shunt regulator (6.2V to 7.3V). A series current-limiting resistor must be added between the 48V source and VCC pin to restrict ICC ≤ 10mA, calculated as RZ ≥ (48V − 6.5V)/10mA = 4.15kΩ minimum, per Absolute Maximum Ratings and Applications Information.
What is the minimum capacitor value required on the TMR pin of the LTC2912CTS8-1#TRPBF?
The TMR pin of the LTC2912CTS8-1#TRPBF requires a minimum 10pF capacitor to ground to ensure stable timeout operation. Values below 10pF may cause erratic or shortened reset pulses; tying TMR directly to VCC disables the timeout entirely, resulting in immediate OV/UV assertion and release on fault detection.
Does the LTC2912CTS8-1#TRPBF support open-drain wired-OR reset bus configurations?
Yes - both UV and OV outputs of the LTC2912CTS8-1#TRPBF are open-drain with weak internal pull-ups to VCC, enabling direct wired-OR connection with other reset sources. The internal 400kΩ pull-up resistance allows shared reset lines without external components, though external pull-ups may be added for faster rise times or stronger drive capability.
LTC2912CTS8-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- 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:
- TSOT-23-8
LTC2912CTS8-1#TRPBF FAQ
1.How can I place an order for LTC2912CTS8-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912CTS8-1#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 LTC2912CTS8-1#TRPBF reliable?
The price and inventory of LTC2912CTS8-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912CTS8-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2912CTS8-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912CTS8-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912CTS8-1#TRPBF?
LTC2912CTS8-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912CTS8-1#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 LTC2912CTS8-1#TRPBF?
For technical support, including LTC2912CTS8-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912CTS8-1#TRPBF requirements.
6.How does Aetrix verify that LTC2912CTS8-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912CTS8-1#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 LTC2912CTS8-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2912CTS8-1#TRPBF?
All LTC2912CTS8-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912CTS8-1#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 LTC2912CTS8-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2912CTS8-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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