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Analog Devices Inc. LTC2912ITS8-3#TRMPBF
- Part No.:
- LTC2912ITS8-3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912ITS8-3#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:380
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Product details
Overview
LTC2912ITS8-3#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC in 8-lead TSOT-23 package, designed for precise power supply supervision with ±1.5% threshold accuracy, 29µA quiescent current, and noninverting open-drain OV output. It operates from 2.3V to 6V supply or higher via internal 6.2V shunt regulator, and supports adjustable reset timeout (e.g., 8.5ms with 1nF) for reliable system reset in desktop computers and network servers.
For engineers reviewing the LTC2912ITS8-3#TRMPBF datasheet, LTC2912ITS8-3#TRMPBF pinout, LTC2912ITS8-3#TRMPBF application, or LTC2912ITS8-3#TRMPBF equivalent, key selection criteria include guaranteed OV latch behavior at VCC ≥ 1V, glitch-immune VH/VL inputs, TMR capacitor-based timeout tuning, and compatibility with 3.3V ±10% supply monitoring.
Technical Context
The LTC2912ITS8-3#TRMPBF implements dual comparator architecture: one monitors VH input for undervoltage (UV), the other monitors VL input for overvoltage (OV), both referenced to an internal 0.5V threshold. Its noninverting OV output latches high upon OV detection and clears only when LATCH pin is pulled high.
It integrates a programmable timer (TMR pin) that sets UV/OV assertion duration using external capacitance, and includes internal VCC shunt regulation enabling operation from 12V/24V/48V supplies with series resistor. Glitch immunity is achieved via low-pass filtering on comparator outputs, not hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V with external series resistor and internal 6.2V shunt regulator |
| UV/OV Threshold Accuracy | ±1.5% over full temperature range - ensures tight trip point control for 3.3V ±10% monitoring |
| Quiescent Current | 29µA typical - enables micropower operation in battery-backed or always-on systems |
| Reset Timeout Period | Adjustable from ~6ms to >10s via TMR capacitor (e.g., 8.5ms with 1nF); disable by tying TMR to VCC |
| Output Type | Open-drain UV (active-low) and noninverting OV (active-high with weak pull-up to VCC) |
| Input Glitch Immunity | Integrated low-pass filtering on VH/VL inputs rejects sub-500µs transients without hysteresis-induced error |
| VCC Undervoltage Lockout | Guaranteed UV assertion and OV blocking below 1.9V–2.1V, with 5–50mV hysteresis |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad optional (not electrically required), RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LATCH (Pin 1) | OV latch clear/bypass control | Pulling high clears OV latch and makes OV behave like UV (timed assertion); low enables latching behavior |
| UV (Pin 2) | Undervoltage logic output | Open-drain active-low output; asserts low when VH input falls below 0.5V threshold |
| OV (Pin 3) | Overvoltage logic output | Noninverting open-drain active-high output; latches high when VL input exceeds 0.5V threshold |
| GND (Pin 4) | Device ground reference | Return path for all internal circuitry and external timing capacitor (TMR-to-GND) |
| TMR (Pin 5) | Reset timeout timer control | Connect external capacitor to GND to set UV/OV assertion duration; tie to VCC to bypass timer |
| VL (Pin 6) | Overvoltage sense input | Monitors low-side divider tap; triggers OV when voltage > 0.5V (e.g., for 3.3V supply with R-divider) |
| VH (Pin 7) | Undervoltage sense input | Monitors high-side divider tap; triggers UV when voltage < 0.5V (e.g., for 3.3V supply with R-divider) |
| VCC (Pin 8) | Power supply input | Accepts 2.3–6V directly; regulates >6V supplies via internal 6.2V shunt; bypass with ≥0.1µF capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Noninverting latched OV output | Enables direct connection to microcontroller reset inputs requiring active-high assertion without external inverter |
| Adjustable UV/OV timeout with disable | Capacitor-programmable delay (9ms/nF) plus TMR-to-VCC bypass allows flexible reset pulse width or immediate release |
| Guaranteed operation down to VCC = 1V | Ensures valid UV low / OV high assertion during brown-out or power-up sequences before full regulation |
| Internal 6.2V shunt regulator | Permits direct connection to 12V/24V/48V rails using only a series current-limiting resistor (no external LDO needed) |
| ±1.5% threshold accuracy over temperature | Reduces need for margining resistors in precision 3.3V ±10% or 5V ±5% supply monitoring applications |
Applications
| Desktop Computer Power Sequencing | Network Server Core Voltage Monitoring |
|---|---|
Use Scenario: Supervising 3.3V ±10% main logic rail during cold boot and thermal throttling events. IC Role / Device Role / Timing Role: LTC2912ITS8-3#TRMPBF acts as primary UV/OV detector with latched OV output to hold system in reset until stable. Use Value: Noninverting OV eliminates level-shifter requirement; ±1.5% accuracy avoids false resets during nominal 3.3V tolerance band. |
Use Scenario: Monitoring 12V intermediate bus feeding multiple DC/DC converters in rack-mounted servers. IC Role / Device Role / Timing Role: LTC2912ITS8-3#TRMPBF interfaces with 48V-to-12V supply via resistor divider and internal shunt regulator. Use Value: 29µA quiescent current minimizes standby loss; glitch immunity prevents spurious resets from switching noise. |
| Industrial PLC I/O Module Supply Check | Medical Imaging System Powergood Signal |
Use Scenario: Validating isolated 5V and 24V auxiliary rails powering analog front-end and communication interfaces. IC Role / Device Role / Timing Role: LTC2912ITS8-3#TRMPBF provides independent UV/OV detection per rail with configurable timeout for fault persistence. Use Value: Adjustable TMR capacitor allows tailoring reset pulse width to match slow-start DC/DC converter settling time. |
Use Scenario: Generating "Powergood" signal for FPGA configuration after 3.3V and 1.2V supplies stabilize within ±5%. IC Role / Device Role / Timing Role: LTC2912ITS8-3#TRMPBF serves as final-stage supervisor asserting OV high only when both VH and VL are valid. Use Value: Latch functionality holds Powergood asserted through brief transients, ensuring reliable FPGA initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912ITS8-1#TRMPBF | Latching OV output is active-low; no noninverting behavior | Requires external inverter or MCU-level inversion for active-high reset signaling | Select when legacy design uses active-low reset or inverter already present |
| LTC2913IDDB#TRPBF | Dual independent UV/OV channels in 10-lead DFN; separate VCC pin; wider temp range (–40°C to 125°C) | Supports monitoring of two distinct supplies (e.g., 3.3V + 1.8V) with independent timeouts | Select when dual-rail supervision is required and board space permits larger package |
Compared with LTC2912ITS8-1#TRMPBF, the LTC2912ITS8-3#TRMPBF eliminates external inversion hardware for active-high reset; compared with LTC2913IDDB#TRPBF, it offers lower cost and smaller footprint for single-rail applications where dual monitoring is unnecessary.
Availability
LTC2912ITS8-3#TRMPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial PLCs requiring stable component supply with guaranteed –40°C to +85°C operation and long-term lifecycle support.
Supply support for LTC2912ITS8-3#TRMPBF 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 family delivers precision, low-power voltage supervision for space-constrained systems, with variants optimized for latch polarity, disable functionality, and package options to meet diverse board-level monitoring needs.
FAQ
What is the operating temperature range for LTC2912ITS8-3#TRMPBF?
The LTC2912ITS8-3#TRMPBF is rated for –40°C to +85°C ambient operation (I-grade). This is confirmed in the Absolute Maximum Ratings table and Order Information section of the datasheet, where "ITS8" suffix denotes Industrial temperature grade. The device maintains ±1.5% threshold accuracy across this full range.
How does the LATCH pin function on LTC2912ITS8-3#TRMPBF?
On the LTC2912ITS8-3#TRMPBF, the LATCH pin (Pin 1) controls OV output behavior: when held low, OV latches high upon overvoltage detection; when pulled high, the latch clears and OV behaves like UV with adjustable timeout. This is explicitly defined in the Pin Functions section for LTC2912-3 variant.
Can LTC2912ITS8-3#TRMPBF monitor a 48V supply directly?
Yes - the LTC2912ITS8-3#TRMPBF can monitor a 48V supply using its internal 6.2V shunt regulator. A series current-limiting resistor must be added between the 48V source and VCC pin to limit input current to ≤10mA, as specified in Absolute Maximum Ratings and Applications Information.
What is the minimum TMR capacitor value for LTC2912ITS8-3#TRMPBF?
The minimum TMR capacitor value is 10pF, as stated in the Pin Functions section: "The TMR pin must have a minimum 10pF load or be tied to VCC." Using less than 10pF may result in unstable or undefined timeout behavior due to insufficient charge storage.
Does LTC2912ITS8-3#TRMPBF support 3.3V ±10% supply monitoring out of the box?
Yes - the LTC2912ITS8-3#TRMPBF is explicitly cited in the Typical Application section for "Single OV/UV Supply Monitor, 3.3V ±10% Tolerance." With appropriate resistor divider values (e.g., RA=4.53kΩ, RB=1kΩ, RC=27.4kΩ), it achieves precise trip points matching that specification.
LTC2912ITS8-3#TRMPBF 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 High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912ITS8-3#TRMPBF FAQ
1.How can I place an order for LTC2912ITS8-3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912ITS8-3#TRMPBF 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 LTC2912ITS8-3#TRMPBF reliable?
The price and inventory of LTC2912ITS8-3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912ITS8-3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912ITS8-3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912ITS8-3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912ITS8-3#TRMPBF?
LTC2912ITS8-3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912ITS8-3#TRMPBF 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 LTC2912ITS8-3#TRMPBF?
For technical support, including LTC2912ITS8-3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912ITS8-3#TRMPBF requirements.
6.How does Aetrix verify that LTC2912ITS8-3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912ITS8-3#TRMPBF 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 LTC2912ITS8-3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912ITS8-3#TRMPBF?
All LTC2912ITS8-3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912ITS8-3#TRMPBF, 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 LTC2912ITS8-3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912ITS8-3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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