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Analog Devices Inc. LTC2915HTS8-1#TRMPBF
- Part No.:
- LTC2915HTS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2915HTS8-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:940
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Product details
Overview
LTC2915HTS8-1#TRMPBF from Analog Devices (formerly Linear Technology) is a high-temperature voltage supervisor IC with 27 selectable reset thresholds, operating from 1.5V to 5.5V supply and consuming only 30μA typical quiescent current. It features three-state SEL1/SEL2/TOL inputs for selecting nominal voltages (12V to 1.0V + ADJ) and tolerance (–5%, –10%, –15%), ±1.5% threshold accuracy over –40°C to 125°C, and glitch-immune open-drain RST output - used in automotive engine control units for reliable power-on reset sequencing.
For engineers reviewing the LTC2915HTS8-1#TRMPBF datasheet, LTC2915HTS8-1#TRMPBF pinout, LTC2915HTS8-1#TRMPBF application, or LTC2915HTS8-1#TRMPBF equivalent, key selection criteria include guaranteed operation at 125°C, selectable –15% tolerance for margin testing, internal 200ms reset timeout, and TSOT-23-8 package compatibility with space-constrained under-hood electronics.
Technical Context
The LTC2915HTS8-1#TRMPBF implements a precision comparator-based supervision architecture with internally trimmed reference dividers and three-state logic decoding for threshold selection. Its VM input monitors external supplies via nine nominal voltage settings (including 0.5V ADJ mode), each configurable with three tolerance bands using TOL pin states.
Reset assertion is controlled by dual-stage immunity: first, a fast 10–150μs undervoltage detect path (tUV), then a programmable timeout (tRST) that prevents false releases during supply recovery. The device guarantees RST assertion down to VCC = 0.8V and supports shunt-regulated operation up to 6.2V on VCC for high-voltage supply monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - powers from low-voltage rails; shunt regulation enables use with 12V supplies via series resistor. |
| Threshold Accuracy | ±1.5% over –40°C to 125°C - ensures reliable trip point across full automotive temperature range without calibration. |
| Quiescent Current | 30μA typical - enables always-on monitoring in battery-backed or low-power ECU subsystems. |
| Reset Timeout | 200ms internal (RT tied to VCC) - meets automotive cold-cranking and boot stabilization timing requirements. |
| VM Input Impedance | 0.5–8MΩ - minimizes loading on monitored supply; supports high-impedance divider networks for ADJ mode. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive applications per AEC-Q100 stress test conditions. |
| RST Output Type | Open-drain - allows wired-OR of multiple supervisors and interface with 3.3V/5V logic pull-ups. |
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 comparator input; threshold set by SEL1/SEL2/TOL configuration or external resistive divider in ADJ mode. |
| SEL1 (Pin 2) | Threshold Selection Input | Three-state logic input (VCC/GND/Open) selecting one of nine nominal monitor voltages per Table 1. |
| TOL (Pin 3) | Tolerance Selection Input | Three-state input (VCC/GND/Open) setting –5%/–10%/–15% tolerance band for all thresholds (LTC2915 only). |
| GND (Pin 4) | Ground Reference | Analog and digital ground return; must be low-impedance connection for accurate threshold referencing. |
| RST (Pin 5) | Open-Drain Reset Output | Asserts low when VM falls below selected threshold; held low for tRST after recovery; requires external pull-up. |
| RT (Pin 6) | Reset Timeout Control | Connect to GND via capacitor (CRT) for adjustable timeout; tie to VCC for fixed 200ms; floating yields ~400μs. |
| SEL2 (Pin 7) | Threshold Selection Input | Second three-state input cooperating with SEL1 to decode nine nominal voltage settings. |
| VCC (Pin 8) | Power Supply Input | Supplies internal circuitry; includes 6.2V shunt regulator for >5.7V operation; bypass with 0.1μF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | Nine nominal voltages (12V–1.0V+ADJ) × three tolerances (–5%/–10%/–15%) - eliminates external resistor networks for flexible system margining. |
| Glitch Immunity | Combined 10–150μs minimum glitch rejection (tUV) and programmable timeout - prevents spurious resets from load transients near threshold. |
| 125°C Guaranteed Operation | Specified performance over full industrial–automotive temperature range - suitable for engine control, transmission, and ADAS modules. |
| Low-VCC Reset Guarantee | RST asserted down to VCC = 0.8V - ensures valid reset signal even during brown-out or cold-cranking conditions. |
| Shunt Regulator on VCC | 6.2V internal shunt enables direct 12V battery monitoring with simple series resistor - no auxiliary LDO required. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
|
Use Scenario: Monitors 5V microcontroller supply and 12V sensor bus in diesel ECU exposed to under-hood temperatures up to 125°C. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset, brown-out detection, and manual reset via pushbutton for field service. Use Value: ±1.5% threshold accuracy ensures reliable reset at –10% tolerance (4.5V) across full temperature range, eliminating false reboots during thermal cycling. |
Use Scenario: Validates stable 3.3V FPGA core supply and 2.5V I/O rail before enabling communication interfaces in modular PLC backplane. IC Role / Device Role / Timing Role: Dual-rail supervisor with independent threshold selection and 200ms timeout to coordinate multi-stage power-up sequence. Use Value: Three-state SEL/TOL inputs allow factory-programmed thresholds without soldering resistors, reducing BOM count and assembly cost. |
| Optical Transceiver Module | Medical Diagnostic Imaging Power System |
|
Use Scenario: Supervises 1.8V laser diode driver and 3.3V DSP supply in compact SFP+ module where board space limits discrete solutions. IC Role / Device Role / Timing Role: Compact TSOT-23 supervisor with ADJ mode configured for custom 1.25V rail monitoring via external divider. Use Value: 0.5–8MΩ VM input impedance avoids loading sensitive analog bias rails while maintaining ±1.5% trip accuracy. |
Use Scenario: Ensures clean power-up of 1.5V ADC reference and 5V motor controller in portable ultrasound system requiring fail-safe initialization. IC Role / Device Role / Timing Role: High-reliability supervisor with –15% tolerance mode for margin testing during production burn-in. Use Value: Selectable –15% tolerance enables verification of system stability at worst-case supply sag, improving field reliability certification pass rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2916HTS8-1#TRMPBF | Fixed –5% tolerance; includes MR pin for manual reset; identical pinout and temperature rating. | Preferred where pushbutton-initiated reset is required (e.g., field diagnostics); lacks –10%/–15% tolerance flexibility. | Select LTC2916HTS8-1#TRMPBF if manual reset functionality is mandatory and tolerance adjustability is unnecessary. |
| LTC2903CMS8-3.3#TRMPBF | Fixed 3.3V threshold; ±0.75% accuracy; 1.1V min VCC; no TOL/SEL pins; MSOP-8 package. | Lower-cost option for single-rail systems; not suitable for multi-voltage or margining applications. | Choose LTC2903CMS8-3.3#TRMPBF only for cost-sensitive, fixed-threshold designs where TSOT-23 footprint is not required. |
Compared with LTC2915HTS8-1#TRMPBF, LTC2916HTS8-1#TRMPBF adds manual reset but removes tolerance selection, while LTC2903CMS8-3.3#TRMPBF trades configurability for higher accuracy and lower VCC operation - making LTC2915HTS8-1#TRMPBF optimal for multi-rail automotive systems requiring field-programmable margins.
Availability
LTC2915HTS8-1#TRMPBF is available at Aetrix Electronics and suitable for automotive engine control, industrial PLC power sequencing, and optical transceiver module design requiring stable component supply across extended temperature ranges.
Supply support for LTC2915HTS8-1#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 precision analog product lines, including high-reliability supervisors for automotive and industrial markets.
The LTC2915 series was designed specifically for automotive-grade voltage monitoring with extended temperature operation, selectable thresholds, and robust glitch immunity - targeting ECU, ADAS, and powertrain applications.
FAQ
What is the maximum supply voltage the LTC2915HTS8-1#TRMPBF can tolerate on its VCC pin?
The LTC2915HTS8-1#TRMPBF includes an internal 6.2V shunt regulator on the VCC pin. When operated from supplies above 5.7V, a series current-limiting resistor must be used to keep VCC pin current ≤5mA. Absolute maximum VCC voltage is 5.7V without external limiting; with proper resistor sizing, the device safely monitors 12V automotive batteries. This capability is confirmed in the Absolute Maximum Ratings table and Applications Information section of the datasheet.
Does the LTC2915HTS8-1#TRMPBF support manual reset functionality?
No, the LTC2915HTS8-1#TRMPBF does not include a manual reset (MR) input. That feature is exclusive to the LTC2916 variant. The LTC2915HTS8-1#TRMPBF uses only SEL1, SEL2, and TOL pins for configuration. If manual reset is required, the pin-compatible LTC2916HTS8-1#TRMPBF should be selected instead - it shares the same TSOT-23-8 package, temperature rating, and threshold selection logic.
How is the reset timeout period configured on the LTC2915HTS8-1#TRMPBF?
The LTC2915HTS8-1#TRMPBF offers three reset timeout options: (1) tie RT pin to VCC for 200ms internal timeout, (2) connect RT to GND via capacitor CRT for adjustable timeout (tRST ≈ 110pF/ms), or (3) leave RT floating for ~400μs. The 200ms default meets automotive cold-cranking requirements, while the capacitor option supports custom delays from ~16ms to seconds. All configurations are validated across –40°C to 125°C.
Can the LTC2915HTS8-1#TRMPBF monitor a 1.2V supply with –15% tolerance?
Yes, the LTC2915HTS8-1#TRMPBF supports 1.2V nominal monitoring with –15% tolerance. Per the Monitor Selection Table, configure SEL1 = GND and SEL2 = VCC for 1.2V nominal; set TOL = GND for –15% tolerance. The resulting threshold is 1.020V (1.2V × 0.85), guaranteed within ±1.5% (1.002V–1.038V) over temperature. This configuration is explicitly listed in the Electrical Characteristics table (VMT12 row, –15% column).
What is the purpose of the ADJ (0.5V) threshold mode on the LTC2915HTS8-1#TRMPBF?
The ADJ mode configures the LTC2915HTS8-1#TRMPBF to monitor an external voltage divider where VM = 0.5V at nominal supply. With TOL = VCC (–5%), the effective threshold becomes 0.475V; with TOL = GND (–15%), it becomes 0.425V. This enables precise supervision of non-standard rails (e.g., 1.35V, 2.8V) using two external resistors. The ADJ mode is validated with ±1.5% accuracy and supports input currents as low as ±15nA, minimizing divider loading.
LTC2915HTS8-1#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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2915HTS8-1#TRMPBF FAQ
1.How can I place an order for LTC2915HTS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2915HTS8-1#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 LTC2915HTS8-1#TRMPBF reliable?
The price and inventory of LTC2915HTS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2915HTS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2915HTS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2915HTS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2915HTS8-1#TRMPBF?
LTC2915HTS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2915HTS8-1#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 LTC2915HTS8-1#TRMPBF?
For technical support, including LTC2915HTS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2915HTS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2915HTS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2915HTS8-1#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 LTC2915HTS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2915HTS8-1#TRMPBF?
All LTC2915HTS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2915HTS8-1#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 LTC2915HTS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2915HTS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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