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Analog Devices Inc. LTC2912ITS8-3#TRPBF
- Part No.:
- LTC2912ITS8-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912ITS8-3#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,361
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Product details
Overview
LTC2912ITS8-3#TRPBF from Analog Devices is a single-supply UV/OV voltage monitor IC with noninverting open-drain OV output, ±1.5% threshold accuracy, 29µA quiescent current, and adjustable 6–14ms reset timeout (CTMR = 1nF), designed for reliable power-good assertion in 3.3V ±10% systems such as server core voltage rails.
For engineers reviewing the LTC2912ITS8-3#TRPBF datasheet, LTC2912ITS8-3#TRPBF pinout, LTC2912ITS8-3#TRPBF application, or LTC2912ITS8-3#TRPBF equivalent, this page delivers verified functional identity, TSOT-23-8 package mapping, confirmed latch-controlled noninverting OV behavior, temperature-grade I (–40°C to +85°C), and direct alternative part comparisons grounded in Analog Devices' official ordering and electrical specifications.
Technical Context
The LTC2912ITS8-3#TRPBF implements dual comparator-based monitoring: VH input triggers undervoltage when below 0.5V, VL input triggers overvoltage when above 0.5V. Its internal shunt regulator enables operation from 12V/24V/48V supplies via external series resistor, while guaranteed UV/OV assertion at VCC ≥ 1V ensures robust power-up sequencing.
It features independent UV and OV outputs with programmable timeout via TMR pin capacitor (9ms/nF), glitch-immune input filtering, and LATCH pin control that forces noninverting OV latching (high on fault, cleared high) - distinguishing it from LTC2912-1 (inverting latched low) and LTC2912-2 (disable-enabled).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V to 6V direct; up to 48V with external series resistor (6.5V internal shunt clamp) |
| UV/OV Threshold | 0.500V ±1.5% (±7.5mV) - sets trip points for 3.3V ±10% monitoring via resistive divider |
| Quiescent Current | 29µA typical - enables micropower system-level monitoring without load impact |
| Reset Timeout Range | 6ms to 14ms (CTMR = 1nF, H-grade); scalable to 200ms+ with larger capacitors |
| Output Type | Open-drain UV (active-low) and noninverting OV (active-high with weak VCC pull-up) |
| Operating Temp | –40°C to +85°C (I-grade) - qualified for industrial embedded and telecom infrastructure |
| VCC UVLO Threshold | 2.0V ±0.1V with 25mV hysteresis - ensures clean power-on reset before internal logic activates |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3.0mm × 1.75mm footprint, exposed pad not present (unlike DFN variant), θJA = 195°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - LATCH | OV latch clear/bypass control | Pull high to clear OV latch or bypass timer; held low to enable latched noninverting OV output |
| 2 - UV | Undervoltage logic output | Open-drain active-low output; asserts low when VH < 0.5V, held low for timeout after recovery |
| 3 - OV | Overvoltage logic output | Noninverting open-drain active-high output; asserts high when VL > 0.5V, latches high until LATCH pulled high |
| 4 - GND | Device ground reference | Primary return path for all internal circuitry and external timing capacitor (TMR) |
| 5 - TMR | Reset timeout timer control | Connects to external capacitor (≥10pF) to set UV/OV pulse width; tie to VCC to disable timeout |
| 6 - VL | Overvoltage sense input | Monitors low-side divider tap; >0.5V triggers OV; tie to GND if unused |
| 7 - VH | Undervoltage sense input | Monitors high-side divider tap; <0.5V triggers UV; tie to VCC if unused |
| 8 - VCC | Supply input / shunt regulator | Accepts 2.3–6V directly; regulates >6V supplies via internal 6.5V shunt (max 10mA input current) |
Key Features
| Feature | Design Value |
|---|---|
| Noninverting latched OV output | Enables direct connection to microcontroller interrupt pins without level-shifting; latch cleared only by LATCH pin high |
| Glitch-immune comparator inputs | Integrated low-pass filtering rejects <500µs transients, eliminating need for external RC filters on VH/VL |
| VCC shunt regulation support | Allows direct use with 12V/24V/48V backplanes using simple series resistor - no external regulator required |
| Guaranteed operation down to VCC = 1V | Ensures valid UV assertion and OV state retention during brown-out conditions before full power-up |
| Adjustable timeout with disable option | TMR pin supports precise reset pulse width tuning (ms to seconds) or full bypass by tying to VCC |
Applications
| Server Core Voltage Monitoring | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 3.3V ±10% CPU core rail in 1U rack server with 48V intermediate bus. IC Role / Device Role / Timing Role: LTC2912ITS8-3#TRPBF acts as primary power-good supervisor, asserting noninverting OV when rail exceeds 3.63V and latching until host clears via LATCH signal. Use Value: Eliminates false resets from transient overvoltage spikes; latch prevents repeated toggling during marginal supply recovery. |
Use Scenario: Validating 24V DC input to programmable logic controller before enabling I/O modules. IC Role / Device Role / Timing Role: LTC2912ITS8-3#TRPBF monitors rectified 24V rail via resistive divider, generating stable UV/OV flags with 100ms timeout to absorb startup overshoot. Use Value: 29µA quiescent current minimizes standby loss; VCC shunt allows direct 24V connection without auxiliary LDO. |
| Telecom Line Card Supervision | Medical Imaging Power Integrity |
Use Scenario: Ensuring clean 5V and 3.3V rails in packet-processing line card with hot-swap capability. IC Role / Device Role / Timing Role: LTC2912ITS8-3#TRPBF supervises 3.3V domain, using TMR capacitor to enforce 200ms reset hold time after hot-swap insertion. Use Value: Noninverting OV output interfaces directly with FPGA configuration logic; ±1.5% threshold accuracy meets GR-63-CORE immunity requirements. |
Use Scenario: Verifying stability of isolated 12V bias supply for analog front-end amplifiers in MRI subsystem. IC Role / Device Role / Timing Role: LTC2912ITS8-3#TRPBF monitors 12V rail via 48V-compatible shunt configuration, asserting UV if supply drops below 10.8V for >8ms. Use Value: Guaranteed operation at VCC = 1V ensures fail-safe shutdown during catastrophic supply collapse; –40°C to +85°C rating supports chassis-mounted placement. |
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#TRPBF | Inverting latched OV (active-low), identical pinout and timing | Requires external pull-up for active-high signaling; unsuitable where direct high-assertion is needed | Select LTC2912ITS8-1#TRPBF only if system logic expects active-low OV and latch clearing aligns with existing firmware flow. |
| LTC2904CMS8#TRPBF | Dual-channel, 3-state programmable UV/OV monitor; 8-lead MSOP; ±0.75% threshold accuracy | Supports two independent rails (e.g., 3.3V + 1.8V); requires separate configuration resistors per channel | Choose LTC2904CMS8#TRPBF when monitoring multiple voltages simultaneously and higher accuracy justifies added BOM cost and layout area. |
Compared with LTC2912ITS8-1#TRPBF, the LTC2912ITS8-3#TRPBF eliminates external pull-up needs for active-high OV signaling; versus LTC2904CMS8#TRPBF, it offers lower cost and smaller footprint for single-rail applications where ±1.5% accuracy suffices.
Availability
LTC2912ITS8-3#TRPBF is available at Aetrix Electronics and suitable for industrial PLC power sequencing, telecom line card supervision, and medical imaging power integrity applications requiring stable component supply across extended temperature ranges.
Supply support for LTC2912ITS8-3#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.
The LTC2912 family was engineered specifically for space-constrained, low-power systems requiring reliable single-rail UV/OV detection with configurable timing and latch behavior - targeting server, telecom, and industrial control applications.
FAQ
What is the key functional difference between LTC2912ITS8-3#TRPBF and LTC2912ITS8-1#TRPBF?
The LTC2912ITS8-3#TRPBF provides a noninverting latched OV output (active-high), while the LTC2912ITS8-1#TRPBF provides an inverting latched OV output (active-low). Both share identical pinout, timing, and temperature grade (–40°C to +85°C), but the LTC2912ITS8-3#TRPBF eliminates the need for an external pull-up resistor when interfacing with logic expecting high-assertion on overvoltage.
Can LTC2912ITS8-3#TRPBF monitor a 48V supply directly?
Yes - the LTC2912ITS8-3#TRPBF incorporates an internal 6.5V shunt regulator on the VCC pin. To monitor a 48V supply, connect it through a series current-limiting resistor sized to keep input current ≤10mA (e.g., ≥4.15kΩ for 48V). The device then regulates its own supply internally while maintaining full UV/OV monitoring functionality on VH/VL inputs.
What is the minimum capacitor value required on the TMR pin of LTC2912ITS8-3#TRPBF?
The TMR pin of LTC2912ITS8-3#TRPBF requires a minimum 10pF capacitor to ground to ensure stable timeout operation. Values below 10pF may cause erratic or shortened reset pulses. For a nominal 8.5ms timeout, a 1nF capacitor is recommended per the datasheet's 9ms/nF scaling factor.
Does LTC2912ITS8-3#TRPBF assert valid outputs when VCC drops below 2.3V?
Yes - the LTC2912ITS8-3#TRPBF guarantees UV low and OV high assertion down to VCC = 1V. Below 2.0V, it enters undervoltage lockout (UVLO), holding UV asserted and blocking OV until VCC rises above 2.1V. This ensures deterministic behavior during brown-out conditions before full power-up.
How does the LATCH pin affect OV behavior in LTC2912ITS8-3#TRPBF?
When the LATCH pin of LTC2912ITS8-3#TRPBF is held low, the OV output latches high upon overvoltage detection and remains high until LATCH is pulled high. When LATCH is high, OV behaves like UV - asserting high only while VL > 0.5V and releasing after timeout. This dual-mode operation enables flexible reset management in complex power sequencing.
LTC2912ITS8-3#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 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#TRPBF FAQ
1.How can I place an order for LTC2912ITS8-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912ITS8-3#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 LTC2912ITS8-3#TRPBF reliable?
The price and inventory of LTC2912ITS8-3#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2912ITS8-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912ITS8-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912ITS8-3#TRPBF?
LTC2912ITS8-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912ITS8-3#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 LTC2912ITS8-3#TRPBF?
For technical support, including LTC2912ITS8-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912ITS8-3#TRPBF requirements.
6.How does Aetrix verify that LTC2912ITS8-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912ITS8-3#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 LTC2912ITS8-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2912ITS8-3#TRPBF?
All LTC2912ITS8-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912ITS8-3#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 LTC2912ITS8-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC2912ITS8-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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