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Analog Devices Inc. LTC2906CTS8#TRMPBF
- Part No.:
- LTC2906CTS8#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2906CTS8#TRMPBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
LTC2906CTS8#TRMPBF from Analog Devices (formerly Linear Technology) is a precision dual supply monitor IC with one pin-selectable threshold input (5V/3.3V/2.5V) and one adjustable 0.5V input, featuring ±1.5% threshold accuracy over temperature, 200ms fixed reset delay, open-drain RST output, and guaranteed operation down to V1 ≥ 1V or VCC ≥ 1V. It is used in desktop/notebook computers and network servers for reliable power-up/power-down sequencing and brownout detection.
For engineers reviewing the LTC2906CTS8#TRMPBF datasheet, LTC2906CTS8#TRMPBF pinout, LTC2906CTS8#TRMPBF application, or LTC2906CTS8#TRMPBF equivalent, this page delivers verified specifications, TSOT-23-8 package details, dual-supply monitoring logic, reset timing behavior, and real-world alternative selection guidance - all grounded in the official LTC2906/LTC2907 datasheet (29067f).
Technical Context
The LTC2906CTS8#TRMPBF implements two independent voltage comparators: one with programmable thresholds (via S1 pin) for V1 (5V/3.3V/2.5V), and another with an adjustable 0.5V reference (VADJ) scaled by TOL pin (5%/7.5%/10%). Internal bandgap reference and resistor network ensure ±1.5% accuracy across –40°C to 85°C.
It features a fixed 200ms reset timeout (tRST = 140–260ms), glitch-immune comparator outputs with integrated low-pass filtering, and internal VCC auto-select (VMAX = max(V1, VCC)) that powers both RST and RST outputs. The RST pin asserts low when either monitored supply falls below its programmed threshold and holds for the full delay after recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Accuracy | ±1.5% of nominal monitored voltage over full temperature range - ensures precise margining without false resets during voltage transients |
| Reset Timeout (tRST) | 200ms nominal (140–260ms min–max) - provides robust immunity to short-duration supply noise and brownouts |
| V1 Input Threshold Options | 5V/3.3V/2.5V selectable via S1 pin (V1/GND/open) - enables flexible system-level supply monitoring without external resistors |
| VADJ Threshold | 0.5V nominal, adjustable via external resistor divider - supports custom trip points from 0.6V to 12V using standard 1% resistors |
| Supply Tolerance Options | 5%, 7.5%, or 10% selectable via TOL pin (V1/open/GND) - allows configurable voltage margining for production testing and reliability validation |
| RST Output Type | Open-drain with weak internal pull-up to VMAX - supports wired-OR reset buses and compatibility with 1.8V–5V logic systems |
| Minimum Operating Voltage | V1 ≥ 1V or VCC ≥ 1V guarantees correct RST logic state - enables reliable reset assertion even during deep brownout conditions |
Pinout & Package
Package: 8-lead TSOT-23 (Thin Small Outline Transistor), 3mm × 1.75mm footprint, 1.1mm max height, exposed pad not present (unlike DFN variant). Pin 1 marked with bar; pin numbering follows standard TSOT-23 convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Optional auxiliary power supply input | Provides backup internal supply (VMAX) when V1 is absent; bypass with ≥0.1µF capacitor to GND |
| RST (Pin 2) | Active-low reset output | Open-drain output asserted low during undervoltage; weak internal pull-up to VMAX; requires external pull-up for fast rise time |
| RST (Pin 3) | Inverted reset output | Asserts low when V1 or VADJ drops below threshold; same drive characteristics as RST pin |
| GND (Pin 4) | Ground reference | Primary return path for internal circuitry and comparator references; must be low-impedance |
| V1 (Pin 5) | Main supply input | Monitored voltage source (5V/3.3V/2.5V); also contributes to VMAX; bypass with ≥0.1µF capacitor |
| S1 (Pin 6) | Threshold select control | Three-state input (V1/GND/open) selecting V1's nominal threshold level per Table 1 |
| VADJ (Pin 7) | Adjustable supply input | Connects to resistor divider tap; internal comparator reference set to 0.5V (scaled by TOL setting) |
| TOL (Pin 8) | Tolerance select control | Three-state input (V1/open/GND) setting common tolerance (5%/7.5%/10%) for both V1 and VADJ |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable V1 thresholds | Eliminates need for external resistors or trimming; supports rapid configuration across 5V/3.3V/2.5V rails |
| Adjustable VADJ input (0.5V base) | Enables precise monitoring of any DC supply from 0.6V to 12V using standard 1% resistor dividers |
| Guaranteed RST operation at V1 ≥ 1V | Ensures deterministic reset assertion during deep brownout, critical for safe microprocessor shutdown |
| Internal VCC auto-select (VMAX) | Automatically chooses higher of V1 or VCC to power RST/RST outputs - no manual supply routing required |
| Power supply glitch immunity | Integrated low-pass filtering + 200ms timeout prevents spurious resets from transient noise near threshold |
Applications
| Desktop Computer Power Sequencing | Notebook System Core/I/O Monitoring |
|---|---|
Use Scenario: Monitoring 5V main rail and 3.3V I/O rail during cold boot and thermal throttling events. IC Role / Device Role / Timing Role: Dual-supply monitor asserting RST until both rails stabilize above 4.675V (5V/5%) and 3.086V (3.3V/5%), with 200ms hold-off. Use Value: Prevents CPU lockup by ensuring clean power delivery before firmware execution begins. | Use Scenario: Validating 3.3V system rail and 1.8V core rail in battery-powered notebook under dynamic load switching. IC Role / Device Role / Timing Role: V1 monitors 3.3V rail (S1 = OPEN), VADJ monitors 1.8V via 49.9k/100k divider (TOL = GND → 10%); RST held low if either drops below threshold. Use Value: Enables graceful suspend/resume by detecting marginal voltage collapse before logic corruption occurs. |
| Network Server PSU Health Check | Industrial Embedded Controller Brownout Protection |
Use Scenario: Verifying redundant 12V and 5V PSUs in rack-mounted server chassis with auxiliary 5V supervision. IC Role / Device Role / Timing Role: V1 = 5V (S1 = V1), VADJ = 12V (R1=2150k, R2=100k), TOL = OPEN (7.5%); RST asserts on first fault, latches for 200ms. Use Value: Triggers immediate failover to backup PSU while preventing nuisance alarms from brief line sags. | Use Scenario: Protecting ARM-based PLC controller during AC line interruption or capacitor discharge decay. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail (V1) and 2.5V analog reference (VADJ); RST forces controlled shutdown when either falls below 2.338V or 2.213V (2.5V/10%). Use Value: Guarantees EEPROM write completion and register save before power loss, eliminating data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2907CTS8#TRMPBF | Adjustable reset delay via external capacitor (CTMR); same pinout and threshold architecture | Required where variable reset timeout (e.g., 50ms–5s) is needed for multi-rail sequencing or FPGA configuration | Select LTC2907CTS8#TRMPBF only if programmable tRST is mandatory; otherwise LTC2906CTS8#TRMPBF offers simpler fixed-delay implementation |
| TPS3808G33DBVR | Single-supply monitor (3.3V only), no adjustable VADJ input, 200ms fixed delay, SOT-23-6 package | Limited to single-rail monitoring; lacks dual-input flexibility and pin-selectable thresholds | Use only for cost-sensitive 3.3V-only systems where dual-monitor capability is unnecessary |
Compared with LTC2907CTS8#TRMPBF, LTC2906CTS8#TRMPBF trades delay adjustability for reduced BOM count and simplified layout; versus TPS3808G33DBVR, it adds true dual-rail monitoring and field-programmable thresholds at higher pin count and cost.
Availability
LTC2906CTS8#TRMPBF is available at Aetrix Electronics and suitable for desktop computers, notebook systems, and network servers requiring stable component supply, long-term industrial lifecycle support, and guaranteed ±1.5% threshold accuracy across temperature.
Supply support for LTC2906CTS8#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 full product support, datasheet documentation, and application engineering for legacy Linear parts including the LTC series.
The LTC2906CTS8#TRMPBF belongs to Linear's precision power monitoring product line, designed specifically for high-reliability computing and communications equipment where accurate, glitch-immune supply supervision is mission-critical.
FAQ
What is the operating temperature range for LTC2906CTS8#TRMPBF?
The LTC2906CTS8#TRMPBF is rated for 0°C to 70°C ambient operation (C-grade). Its ±1.5% threshold accuracy, 200ms reset timeout, and guaranteed RST functionality at V1 ≥ 1V are all specified across this full range. For extended industrial use (–40°C to 85°C), the LTC2906ITS8#TRMPBF variant is recommended.
Can LTC2906CTS8#TRMPBF monitor a 1.2V supply?
Yes - LTC2906CTS8#TRMPBF can monitor 1.2V supplies using the VADJ input. With TOL set to V1 (5% mode), a resistor divider (e.g., R1 = 124kΩ, R2 = 100kΩ) sets the trip point to 1.12V. The internal 0.5V reference scales linearly, enabling accurate monitoring from 0.6V to 12V with appropriate external resistors.
Does LTC2906CTS8#TRMPBF require external pull-up resistors on RST?
LTC2906CTS8#TRMPBF includes a weak internal pull-up to VMAX (~6µA), sufficient for slow-rise applications. However, for fast rise time (<10µs) or VOH > VMAX, an external pull-up (e.g., 10kΩ) is required. The datasheet confirms RST remains functional without external components but specifies performance limits under load.
How does the S1 pin configure the V1 threshold in LTC2906CTS8#TRMPBF?
In LTC2906CTS8#TRMPBF, the S1 pin selects V1's nominal threshold: connect S1 to V1 for 5.0V, leave open for 3.3V, or tie to GND for 2.5V. This three-state configuration uses internal pull-ups/downs and requires no external drivers - leakage current is limited to ±25µA per the Electrical Characteristics table.
Is LTC2906CTS8#TRMPBF pin-compatible with LTC2907CTS8#TRMPBF?
Yes - LTC2906CTS8#TRMPBF and LTC2907CTS8#TRMPBF share identical TSOT-23-8 pinout and footprint. The only functional difference is that Pin 2 is RST (fixed delay) in LTC2906CTS8#TRMPBF and TMR (capacitor-programmed delay) in LTC2907CTS8#TRMPBF; all other pins (VCC, RST, GND, V1, S1, VADJ, TOL) retain identical roles and electrical behavior.
LTC2906CTS8#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:
- 2
- Voltage - Threshold:
- 2.5V, 3.3V, 5V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2906CTS8#TRMPBF FAQ
1.How can I place an order for LTC2906CTS8#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2906CTS8#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 LTC2906CTS8#TRMPBF reliable?
The price and inventory of LTC2906CTS8#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2906CTS8#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2906CTS8#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2906CTS8#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2906CTS8#TRMPBF?
LTC2906CTS8#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2906CTS8#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 LTC2906CTS8#TRMPBF?
For technical support, including LTC2906CTS8#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2906CTS8#TRMPBF requirements.
6.How does Aetrix verify that LTC2906CTS8#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2906CTS8#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 LTC2906CTS8#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2906CTS8#TRMPBF?
All LTC2906CTS8#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2906CTS8#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 LTC2906CTS8#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2906CTS8#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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