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Analog Devices Inc. LTC2912ITS8-1#TRMPBF
- Part No.:
- LTC2912ITS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912ITS8-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,819
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Product details
Overview
LTC2912ITS8-1#TRMPBF from Analog Devices is a single-supply UV/OV voltage monitor IC with latch-controlled open-drain OV output, ±1.5% threshold accuracy, 29µA quiescent current, and adjustable 6–14ms reset timeout (CTMR = 1nF). It operates from 2.3V to 6V supply or up to 48V via internal 6.2V shunt regulator, and is used in core voltage supervision for industrial servers and embedded power systems.
For engineers reviewing the LTC2912ITS8-1#TRMPBF datasheet, LTC2912ITS8-1#TRMPBF pinout, LTC2912ITS8-1#TRMPBF application, or LTC2912ITS8-1#TRMPBF equivalent, key selection criteria include guaranteed UV/OV assertion at VCC ≥ 1V, glitch-immune VH/VL inputs with integrated filtering, latch-clear functionality on LATCH pin, and TSOT-23-8 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2912ITS8-1#TRMPBF implements dual comparator-based monitoring: VH input triggers undervoltage when below 0.5V, VL input triggers overvoltage when above 0.5V. Both inputs feature low-pass filtering to reject sub-500µs transients, ensuring noise immunity without external hysteresis.
Its internal architecture includes an oscillator-driven timer (tUOTO = 9ms/nF), a 6.2V VCC shunt regulator enabling operation from 12V/24V/48V rails with series resistor, and independent UV/OV outputs with open-drain topology - OV latched low (LTC2912-1 variant), UV asserted low with programmable timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V–6V direct; up to 48V via 6.2V shunt regulator + external current-limiting resistor |
| Threshold Accuracy | ±1.5% over full temperature range - ensures reliable 3.3V ±10% monitoring without margining drift |
| Quiescent Current | 29µA typical - enables always-on supervision in battery-backed or low-power systems |
| UV/OV Timeout | 6–14ms (CTMR = 1nF); scalable to 200ms with 22nF capacitor - guarantees minimum reset pulse width |
| Input Glitch Immunity | Rejects transients < 500µs - eliminates false resets from switching noise or load transients |
| Output Type | Open-drain UV and OV - supports wired-OR reset bus and level-shifting across voltage domains |
| VCC UVLO Threshold | 2.0V (typical) with 25mV hysteresis - provides clean power-fail detection before internal logic collapse |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad not present (TSOT-23 variant), θJA = 195°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | LATCH | OV latch clear/bypass input; high = clears latch, low = enables latched OV behavior |
| 2 | UV | Undervoltage logic output; open-drain, asserts low during VH < 0.5V, timed by TMR |
| 3 | OV | Overvoltage logic output; open-drain, latched low during VL > 0.5V (LTC2912-1 function) |
| 4 | GND | Device ground reference and return path for all internal circuitry and TMR capacitor |
| 5 | TMR | Reset timeout timing node; connects to GND via capacitor (CTMR) to set tUOTO = 9ms/nF |
| 6 | VL | Voltage Low input; monitors overvoltage condition - assert when > 0.5V (threshold referenced to internal 0.5V bandgap) |
| 7 | VH | Voltage High input; monitors undervoltage condition - assert when < 0.5V |
| 8 | VCC | Supply input; accepts 2.3V–6V directly or higher voltages via internal 6.2V shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed operation down to VCC = 1V | UV asserts low and OV pulls weakly high even at 1V supply - enables fail-safe reset during brownout |
| Adjustable timeout disable | TMR pin tied to VCC bypasses timer - allows immediate OV/UV assertion without delay |
| Internal shunt regulator | 6.2V VCC clamp with ±300mV load regulation - simplifies high-voltage rail monitoring without external LDO |
| Glitch-immune comparator inputs | VH/VL inputs filtered to reject <500µs transients - eliminates need for external RC filters or hysteresis resistors |
| Latch control via dedicated pin | LATCH pin provides hardware-level OV state management - avoids software dependency in safety-critical systems |
Applications
| Server Core Voltage Supervision | Industrial PLC Power Sequencing |
|---|---|
|
Use Scenario: Monitoring 3.3V ±10% CPU core rail in 1U rack server with hot-swap capability. IC Role / Device Role / Timing Role: LTC2912ITS8-1#TRMPBF acts as primary UV/OV detector; VH/VL configured via 3-resistor divider; OV latch holds reset until manual clear or power cycle. Use Value: Prevents processor lockup during transient overvoltage events (e.g., load dump) while maintaining ±1.5% trip accuracy across –40°C to 85°C. |
Use Scenario: Coordinating startup of dual 24V/5V supplies in modular PLC backplane with strict sequencing requirements. IC Role / Device Role / Timing Role: LTC2912ITS8-1#TRMPBF supervises 24V rail; UV output enables downstream 5V regulator only after stable 24V is confirmed; TMR sets 100ms hold time. Use Value: Eliminates need for discrete RC timing networks and reduces BOM count by integrating accurate, temperature-stable reset timing. |
| Telecom Line Card Powergood | Medical Imaging Subsystem Reset |
|
Use Scenario: Generating POWERGOOD signal for 48V intermediate bus in telecom line card with ±10% tolerance. IC Role / Device Role / Timing Role: LTC2912ITS8-1#TRMPBF monitors 48V via RZ current-limiting resistor + shunt regulation; OV output drives optocoupler-isolated PG signal. Use Value: Enables direct 48V supervision without auxiliary bias supply - reduces component count and improves reliability vs. multi-stage solutions. |
Use Scenario: Ensuring safe initialization of FPGA-based image processing module in MRI subsystem requiring deterministic reset timing. IC Role / Device Role / Timing Role: LTC2912ITS8-1#TRMPBF provides synchronized UV/OV reset with 8.5ms timeout (1nF TMR); latch disabled to allow automatic recovery after brief dip. Use Value: Guarantees 100% deterministic reset pulse width independent of supply ramp rate - critical for FPGA configuration integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912CTS8-1#TRMPBF | Same functionality and pinout; rated for 0°C to 70°C (vs. –40°C to 85°C for LTC2912ITS8-1#TRMPBF) | Suitable for commercial-grade computing equipment; not qualified for extended industrial temperature range | Select when ambient operating temperature remains within 0°C–70°C and cost sensitivity outweighs thermal margin needs. |
| LTC2913IDDB-1#TRMPBF | Dual UV/OV monitor in 3×3mm DFN; separate VCC pin; identical threshold accuracy and 29µA IQ but adds second monitoring channel | Enables simultaneous supervision of two rails (e.g., 3.3V + 1.8V) without doubling board area or layout complexity | Choose when dual-rail monitoring is required and PCB space permits DFN package; no pin compatibility with TSOT-23. |
Compared with LTC2912CTS8-1#TRMPBF, the LTC2912ITS8-1#TRMPBF offers extended temperature qualification essential for industrial deployments, while LTC2913IDDB-1#TRMPBF trades single-rail simplicity for dual-channel capability in compact DFN - neither is pin-compatible, but both address adjacent system-level supervision requirements.
Availability
LTC2912ITS8-1#TRMPBF is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging subsystems, and network servers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2912ITS8-1#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 since 1965.
The LTC2912 product line delivers precision, micropower voltage supervision for space-constrained, thermally demanding applications - designed specifically for reliable UV/OV detection in servers, base stations, and mission-critical embedded systems.
FAQ
What is the operating temperature range of the LTC2912ITS8-1#TRMPBF?
The LTC2912ITS8-1#TRMPBF is specified for –40°C to +85°C ambient operation (I-grade), validated per manufacturer's characterization across this full range. This qualifies it for industrial environments where thermal cycling and extended ambient conditions are common, unlike the C-grade (0°C to 70°C) variant LTC2912CTS8-1#TRMPBF.
How does the LTC2912ITS8-1#TRMPBF achieve operation from 48V supplies?
The LTC2912ITS8-1#TRMPBF uses an internal 6.2V shunt regulator on the VCC pin. When supplied from 48V, a series current-limiting resistor must be placed between the 48V source and VCC to restrict input current to ≤10mA. The device then regulates its own supply internally, drawing only 29µA quiescent current while maintaining full functionality.
What is the function of the LATCH pin on the LTC2912ITS8-1#TRMPBF?
The LATCH pin on the LTC2912ITS8-1#TRMPBF controls the OV output behavior: when pulled low, OV latches low upon overvoltage detection and remains asserted until LATCH is pulled high to clear it. When held high, OV behaves like UV - asserting for the programmed timeout period and then releasing automatically.
Can the LTC2912ITS8-1#TRMPBF monitor negative voltages?
No, the LTC2912ITS8-1#TRMPBF is designed exclusively for positive voltage monitoring. Its VH and VL inputs are referenced to GND and require positive input signals; applying negative voltage violates Absolute Maximum Ratings (–0.3V min on VH/VL). For negative rail supervision, Analog Devices recommends the LTC2909 or LTC2914 families.
What is the minimum capacitor value required on the TMR pin of the LTC2912ITS8-1#TRMPBF?
The TMR pin requires a minimum 10pF capacitor to GND to ensure stable timing operation. Values below 10pF may cause erratic timeout behavior due to insufficient charge storage. For standard applications, 1nF yields ~8.5ms timeout; 22nF extends it to ~200ms as shown in typical application circuits.
LTC2912ITS8-1#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 Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912ITS8-1#TRMPBF FAQ
1.How can I place an order for LTC2912ITS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912ITS8-1#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 LTC2912ITS8-1#TRMPBF reliable?
The price and inventory of LTC2912ITS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912ITS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912ITS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912ITS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912ITS8-1#TRMPBF?
LTC2912ITS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912ITS8-1#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 LTC2912ITS8-1#TRMPBF?
For technical support, including LTC2912ITS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912ITS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2912ITS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912ITS8-1#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 LTC2912ITS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912ITS8-1#TRMPBF?
All LTC2912ITS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912ITS8-1#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 LTC2912ITS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912ITS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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