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Analog Devices Inc. LTC2915ITS8-1#TRMPBF
- Part No.:
- LTC2915ITS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2915ITS8-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2915ITS8-1#TRMPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 27 selectable reset thresholds, designed for reliable power-on reset and supply monitoring in automotive and industrial systems. It operates from 1.5V to 5.5V, consumes only 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 125°C, and features glitch-filtered open-drain RST output. It is used in engine control units to monitor 1.8V microcontroller core supplies.
For engineers reviewing the LTC2915ITS8-1#TRMPBF datasheet, LTC2915ITS8-1#TRMPBF pinout, LTC2915ITS8-1#TRMPBF application, or LTC2915ITS8-1#TRMPBF equivalent, key selection criteria include its 9 nominal voltage selections (12V to ADJ), 3 tolerance options (–5%/–10%/–15%), internal 200ms reset timeout, TSOT-23-8 package, and guaranteed operation down to VCC = 0.8V.
Technical Context
The LTC2915ITS8-1#TRMPBF implements a precision comparator-based supervision architecture with three-state SEL1/SEL2/TOL inputs that configure both nominal threshold (e.g., 1.8V, 3.3V, 5V) and tolerance band (–5%, –10%, –15%) without external resistors. Its internal reference and divider matrix ensure stable trip points across temperature.
It integrates a 6.2V shunt regulator on VCC for high-voltage operation (up to 12V supply via series resistor), supports adjustable reset timeout via external capacitor on RT pin, and delivers glitch immunity with dual-stage filtering: analog comparator anti-glitch circuitry (tUV ≤ 150μs) plus programmable digital timeout (150–260ms typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - powers internal circuitry; enables direct connection to low-voltage rails like 1.8V or 2.5V logic supplies. |
| Threshold Accuracy | ±1.5% over –40°C to 125°C - ensures reliable reset assertion even under extreme thermal stress in automotive ECUs. |
| Quiescent Current | 30μA typical - minimizes standby power draw in battery-backed or always-on embedded systems. |
| Reset Output Type | Open-drain RST - allows wired-OR configuration with other supervisors and flexible pull-up to any logic rail (e.g., 3.3V). |
| Minimum VCC for RST | 0.8V - guarantees valid reset assertion during brown-out conditions before full system power-up. |
| Operating Temp | –40°C to 125°C (H-grade) - qualified for under-hood automotive applications per AEC-Q100 requirements. |
| Reset Timeout | 200ms internal default - meets JEDEC JESD78 reliability standards for minimum reset pulse width in microprocessor systems. |
Pinout & Package
Package: 8-Lead TSOT-23 (ThinSOT™), 3.0mm × 1.75mm × 1.0mm profile, exposed pad optional, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM (Pin 1) | Voltage Monitor Input | High-impedance input (≥0.5MΩ) connected to monitored supply rail; trip point set by SEL1/SEL2/TOL configuration. |
| SEL1 (Pin 2) | Threshold Selection Input | Three-state logic input (VCC/GND/open) selecting one of nine nominal voltages (e.g., 1.8V, 3.3V); determines VM trip point. |
| TOL (Pin 3) | Tolerance Selection Input | Three-state input (VCC/GND/open) setting –5%, –10%, or –15% tolerance band for LTC2915 family; enables margining tests. |
| GND (Pin 4) | Ground Reference | Primary return path for all internal circuits and RST output; must be low-impedance connection to system ground plane. |
| RST (Pin 5) | Open-Drain Reset Output | Asserts low when VM falls below programmed threshold; held low for timeout period after recovery; requires external pull-up. |
| RT (Pin 6) | Reset Timeout Control | Connects to external capacitor for adjustable timeout (9ms/nF); tied to VCC for fixed 200ms; floating yields ~400μs. |
| SEL2 (Pin 7) | Threshold Selection Input | Second three-state input cooperating with SEL1 to select 9 preset thresholds; open/GND/VCC combinations define voltage mode. |
| VCC (Pin 8) | Power Supply Input | Supplies internal circuitry; includes integrated 6.2V shunt regulator enabling operation from >5.7V supplies with series resistor. |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | Combines 9 nominal voltages (12V to ADJ) × 3 tolerances (–5%/–10%/–15%) - eliminates need for external resistor dividers in most designs. |
| Glitch Immunity | Integrated analog anti-glitch circuitry + programmable digital timeout - prevents false resets from load transients or noise near trip point. |
| High-Temperature Operation | Guaranteed functionality at –40°C to 125°C - supports deployment in engine compartments, industrial PLCs, and base station power supplies. |
| Low-Voltage Reset Enable | RST asserted down to VCC = 0.8V - ensures robust reset generation during deep brown-out or cold-start conditions. |
| Shunt Regulator Integration | Internal 6.2V shunt on VCC pin - enables direct connection to 12V automotive batteries using only a single series current-limiting resistor. |
Applications
| Automotive Engine Control Unit | Industrial PLC Power Sequencing |
|---|---|
|
Use Scenario: Monitoring 1.8V microcontroller core supply in an ECU operating under wide temperature and vibration conditions. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset if core rail drops below 1.71V (–5% of 1.8V) during cranking or load dump. Use Value: Prevents MCU lockup by guaranteeing ≥200ms reset pulse with ±1.5% threshold accuracy across –40°C to 125°C. |
Use Scenario: Coordinating startup of multiple 3.3V I/O modules and 5V communication interfaces in a modular PLC backplane. IC Role / Device Role / Timing Role: Single-supply monitor generating synchronized reset for all downstream logic after main 5V rail stabilizes. Use Value: Eliminates external resistor networks and reduces BOM count while supporting configurable tolerance for field calibration. |
| Optical Transceiver Module | Cell Phone Base Station RF Power Amplifier |
|
Use Scenario: Supervising 2.5V bias supply for laser diode driver ICs in SFP+ modules exposed to ambient temperature swings. IC Role / Device Role / Timing Role: Detects undervoltage on 2.5V rail and asserts open-drain RST to disable laser until safe operating conditions are restored. Use Value: Leverages 2.5V, –10% threshold (2.25V) with ±1.5% accuracy to avoid nuisance resets during transient load spikes. |
Use Scenario: Monitoring 12V DC-DC converter output feeding GaN RF power amplifiers in remote radio heads. IC Role / Device Role / Timing Role: Uses internal shunt regulator to derive local 3.3V logic supply while supervising 12V rail via VM pin. Use Value: Enables single-chip solution for high-side monitoring without isolated feedback, reducing layout complexity and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2916ITS8-1#TRMPBF | Fixed –5% tolerance; includes manual reset (MR) pin; same pinout and thresholds. | Required where push-button reset is needed (e.g., field service access); lacks tolerance flexibility for margin testing. | Select LTC2916ITS8-1#TRMPBF when MR functionality is mandatory and tolerance adjustment is unnecessary. |
| LTC2904IMS8#TRPBF | Dual-channel supervisor; 2 independent 3-state programmable thresholds; no shunt regulator; MSOP-8 package. | Suitable for multi-rail systems (e.g., 1.2V + 3.3V) but cannot monitor >5.5V supplies directly without external regulation. | Choose LTC2904IMS8#TRPBF when supervising two separate rails simultaneously and board space permits larger MSOP-8 footprint. |
Compared with LTC2916ITS8-1#TRMPBF, the LTC2915ITS8-1#TRMPBF offers tolerance configurability at the cost of manual reset; versus LTC2904IMS8#TRPBF, it provides higher-voltage capability and lower quiescent current but monitors only one rail.
Availability
LTC2915ITS8-1#TRMPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, optical transceiver modules, and cell phone base station RF power amplifiers requiring stable component supply across extended temperature ranges.
Supply support for LTC2915ITS8-1#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 acquired Linear Technology in 2017 and maintains its high-reliability analog IC portfolio, emphasizing precision, low power, and ruggedized performance for mission-critical applications.
The LTC2915 belongs to Linear's voltage supervisor product line, engineered specifically for automotive and industrial environments where guaranteed reset behavior, wide temperature operation, and minimal external components are essential.
FAQ
What is the maximum supply voltage the LTC2915ITS8-1#TRMPBF can tolerate on its VCC pin?
The LTC2915ITS8-1#TRMPBF has an absolute maximum VCC rating of 5.7V. However, its integrated 6.2V shunt regulator allows operation from higher supplies (e.g., 12V) when a current-limiting resistor is placed between the source and VCC pin. Without that resistor, exceeding 5.7V risks violating the ±5mA terminal current limit and damaging the device. The LTC2915ITS8-1#TRMPBF datasheet specifies RCC sizing based on supply min/max to maintain safe current.
How does the LTC2915ITS8-1#TRMPBF achieve ±1.5% threshold accuracy over temperature?
The LTC2915ITS8-1#TRMPBF achieves ±1.5% threshold accuracy through factory-trimmed internal reference and divider networks, combined with matched transistor ratios in its comparator core. This trimming is performed across the full –40°C to 125°C range and verified during H-grade qualification. The LTC2915ITS8-1#TRMPBF does not rely on external components, eliminating drift sources such as resistor temperature coefficients.
Can the LTC2915ITS8-1#TRMPBF monitor a 12V supply directly?
Yes - the LTC2915ITS8-1#TRMPBF can monitor a 12V supply directly using its internal 6.2V shunt regulator on the VCC pin. A series resistor (e.g., 11kΩ for 12V) limits current into VCC, while the VM pin connects to the 12V rail. The SEL1/SEL2 pins are configured for "12V" mode, and TOL selects the desired tolerance. This eliminates external regulators and simplifies high-voltage supervision in automotive and telecom applications.
What is the function of the RT pin on the LTC2915ITS8-1#TRMPBF?
The RT pin on the LTC2915ITS8-1#TRMPBF controls the reset timeout duration. Connecting RT to VCC sets a fixed 200ms timeout; leaving RT floating yields ~400μs; attaching an external capacitor (CRT) from RT to GND adjusts timeout per CRT = tRST × 110 pF/ms (e.g., 2.2nF → 20ms). This flexibility allows optimization for fast-recovery systems or long-duration processor initialization sequences in the LTC2915ITS8-1#TRMPBF design.
Does the LTC2915ITS8-1#TRMPBF support manual reset functionality?
No - manual reset (MR) is exclusive to the LTC2916 variant. The LTC2915ITS8-1#TRMPBF lacks the MR pin; its reset is triggered solely by VM undervoltage detection and timeout. If manual reset is required, the pin-compatible LTC2916ITS8-1#TRMPBF should be selected instead. Both share identical threshold programming, package, and temperature grade - only the TOL/MR pin assignment differs between the two families.
LTC2915ITS8-1#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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 27 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2915ITS8-1#TRMPBF FAQ
1.How can I place an order for LTC2915ITS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2915ITS8-1#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 LTC2915ITS8-1#TRMPBF reliable?
The price and inventory of LTC2915ITS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2915ITS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2915ITS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2915ITS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2915ITS8-1#TRMPBF?
LTC2915ITS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2915ITS8-1#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 LTC2915ITS8-1#TRMPBF?
For technical support, including LTC2915ITS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2915ITS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2915ITS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2915ITS8-1#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 LTC2915ITS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2915ITS8-1#TRMPBF?
All LTC2915ITS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2915ITS8-1#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 LTC2915ITS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2915ITS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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