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Analog Devices Inc. LTC2906ITS8#TRMPBF
- Part No.:
- LTC2906ITS8#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2906ITS8#TRMPBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:329
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Product details
Overview
LTC2906ITS8#TRMPBF from Analog Devices (formerly Linear Technology) is a precision dual supply monitor IC designed for reliable power-up, brownout, and power-down supervision in multi-rail systems. It monitors two independent voltage inputs - one pin-selectable (5V/3.3V/2.5V) and one adjustable (0.5V nominal threshold) - with ±1.5% threshold accuracy over –40°C to +85°C, 200ms fixed reset delay, and guaranteed RST assertion down to V1 ≥ 1V or VCC ≥ 1V. It is used in industrial embedded controllers requiring robust, low-power supply monitoring.
For engineers reviewing the LTC2906ITS8#TRMPBF datasheet, LTC2906ITS8#TRMPBF pinout, LTC2906ITS8#TRMPBF application, or LTC2906ITS8#TRMPBF equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in the official Linear Technology LTC2906/LTC2907 datasheet (29067f) and package drawings.
Technical Context
The LTC2906ITS8#TRMPBF implements two independent comparators with a shared open-drain RST output and internal bandgap reference. Its V1 input supports three factory-programmable thresholds (5V/3.3V/2.5V) via S1 pin states, while VADJ provides a 0.5V nominal trip point scalable by external resistor divider. Tolerance selection (5%/7.5%/10%) is set via TOL pin state, affecting both inputs simultaneously.
Internal logic guarantees RST remains asserted during power-up until both monitored supplies exceed their programmed thresholds for ≥200ms, and reasserts immediately upon any undervoltage event. The device uses glitch-immune comparator outputs with integrated low-pass filtering and relies on VMAX = max(V1, VCC) as its internal supply - enabling correct RST behavior even when only one rail is present above 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Monitoring Inputs | Two independent: V1 (pin-selectable 5V/3.3V/2.5V) and VADJ (adjustable 0.5V nominal) |
| Threshold Accuracy | ±1.5% of programmed nominal voltage over –40°C to +85°C - ensures tight margining without false resets |
| Reset Delay | Fixed 200ms (LTC2906 variant) - eliminates noise-induced spurious resets for transients <5Hz |
| RST Output Type | Open-drain with weak internal pull-up to VMAX - enables wired-OR reset bus and level-shifting flexibility |
| Minimum Operating Voltage | V1 ≥ 1V or VCC ≥ 1V required to guarantee valid RST logic state - supports auxiliary-supply-assisted monitoring |
| Supply Tolerance Options | Selectable 5%, 7.5%, or 10% via TOL pin - allows system-level voltage margining without hardware change |
| Quiescent Current | 100µA max at TA = 85°C - enables use in always-on, battery-backed supervisory paths |
Pinout & Package
Package: 8-lead TSOT-23 (Thin Small Outline Transistor), 3mm × 1.75mm footprint, 1mm profile. Exposed pad not electrically connected; no thermal pad requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Optional auxiliary supply input | Provides backup power path; VMAX = max(V1, VCC) powers internal circuitry and RST driver |
| RST (Pin 2) | Active-low reset output | Open-drain output asserted low when either V1 or VADJ falls below threshold; guaranteed operation down to VMAX = 1V |
| GND (Pin 3) | Ground reference | Primary return for all analog and digital circuitry; must be low-impedance connection |
| V1 (Pin 4) | Main supply input | Monitored rail with programmable threshold (5V/3.3V/2.5V); also contributes to VMAX generation |
| TOL (Pin 5) | Three-state tolerance select | Connect to V1/GND/open to set 5%/10%/7.5% supply tolerance for both V1 and VADJ |
| S1 (Pin 6) | Three-state threshold select | Connect to V1/GND/open to select V1 nominal threshold: 5V/2.5V/3.3V respectively |
| VADJ (Pin 7) | Adjustable supply input | Monitors user-defined rail via external resistor divider; nominal 0.5V trip point with ±1.5% accuracy |
| V1 (Pin 8) | Redundant V1 connection | Same node as Pin 4 - required for proper S1/TOL logic decoding; must be tied together externally |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RST operation at V1 ≥ 1V or VCC ≥ 1V | Enables reliable reset assertion during deep brownout or single-rail power-up sequences |
| ±1.5% threshold accuracy over full temperature range | Reduces system voltage margin requirements vs. ±2.5% alternatives - improves power efficiency |
| 200ms fixed reset timeout | Eliminates need for external timing capacitor - simplifies BOM and layout for cost-sensitive designs |
| Three-state programming pins (S1, TOL) | Configures thresholds and tolerances without external resistors - reduces component count and board area |
| Power supply glitch immunity | Integrated comparator low-pass filtering prevents false triggers from sub-150µs supply transients |
| Internal VCC auto-select (VMAX = max(V1, VCC)) | Ensures continuous RST functionality even if primary supply fails, provided auxiliary VCC ≥ 1V |
Applications
| Industrial PLC Power Sequencing | Medical Diagnostic Imaging Subsystem |
|---|---|
|
Use Scenario: Supervises dual 3.3V I/O and 2.5V core rails in a field-programmable gate array (FPGA)-based controller during cold start and brownout events. IC Role / Device Role / Timing Role: Dual-supply monitor providing synchronized 200ms reset pulse to FPGA configuration logic and microcontroller reset input. Use Value: Prevents partial configuration or metastability by ensuring both rails stabilize before release - enabled by ±1.5% accuracy and glitch immunity. |
Use Scenario: Monitors 5V analog front-end and 1.8V ADC reference supply in portable ultrasound equipment with strict safety-critical reset timing. IC Role / Device Role / Timing Role: Precision supervisor asserting RST until both supplies exceed 4.75V and 1.71V respectively for ≥200ms. Use Value: Guarantees clean startup of sensitive analog signal chain - supported by guaranteed RST assertion down to V1 ≥ 1V during marginal conditions. |
| Network Switch ASIC Core Supply | Automotive Infotainment Domain Controller |
|
Use Scenario: Tracks 1.2V core and 3.3V I/O supplies in a high-density Ethernet switch ASIC with tight voltage margins. IC Role / Device Role / Timing Role: Dual-input monitor using VADJ (via resistor divider) for 1.2V rail and V1 for 3.3V rail, with 5% tolerance setting. Use Value: Enables precise margin testing without redesign - selectable tolerance and pin-programmable thresholds allow in-system validation. |
Use Scenario: Supervises 5V infotainment main supply and 2.5V display interface rail in automotive head unit under wide ambient temperature (-40°C to +85°C). IC Role / Device Role / Timing Role: Temperature-stable dual monitor asserting RST during ignition cycling and load-dump recovery. Use Value: Maintains ±1.5% threshold accuracy across full automotive temp range - avoids false resets during engine cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single 3.3V monitor with adjustable delay; no dual-input capability or VADJ support | Requires two devices to replicate LTC2906ITS8#TRMPBF's dual-rail function; lacks pin-selectable thresholds | Choose only if monitoring a single rail with flexible timing - not a functional substitute for dual-supply supervision |
| MAX6816EUT+T | Single 5V monitor with push-pull output; ±2.5% threshold accuracy; no adjustable input or tolerance selection | Cannot monitor two independent rails; lower accuracy increases system voltage margin overhead | Select only for basic 5V-only supervision where cost is primary concern and dual-rail capability is unnecessary |
Compared with TPS3808G33DBVR and MAX6816EUT+T, the LTC2906ITS8#TRMPBF uniquely integrates dual-rail monitoring, ±1.5% accuracy, and pin-configurable thresholds/tolerances in one TSOT-23 package - reducing component count and improving system reliability in space-constrained multi-voltage designs.
Availability
LTC2906ITS8#TRMPBF is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and network infrastructure applications requiring stable component supply, extended temperature operation (–40°C to +85°C), and precision voltage supervision.
Supply support for LTC2906ITS8#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, documentation, and manufacturing continuity for the LTC portfolio.
The LTC2906 series belongs to Linear's precision power supervision product line, engineered specifically for high-reliability systems demanding accurate, low-power, multi-rail voltage monitoring with minimal external components.
FAQ
What is the operating temperature range for the LTC2906ITS8#TRMPBF?
The LTC2906ITS8#TRMPBF is rated for –40°C to +85°C ambient operation (Industrial grade). This is confirmed by the "I" suffix in the part number and explicitly stated in the Electrical Characteristics table of the LTC2906/LTC2907 datasheet (29067f, page 2). All key parameters - including ±1.5% threshold accuracy and 200ms reset delay - are guaranteed across this full range.
Does the LTC2906ITS8#TRMPBF support adjustable reset delay?
No, the LTC2906ITS8#TRMPBF does not support adjustable reset delay. It is the LTC2906 variant, which features a fixed 200ms reset timeout. Adjustable delay is exclusive to the LTC2907 family (e.g., LTC2907ITS8#TRMPBF), which uses an external capacitor on the TMR pin. The datasheet clearly distinguishes this: "200ms Reset Time Delay (LTC2906 Only)" and "Adjustable Reset Time Delay (LTC2907 Only)" (page 1, FEATURES section).
Can the LTC2906ITS8#TRMPBF monitor a 1.2V supply?
Yes, the LTC2906ITS8#TRMPBF can monitor a 1.2V supply using the VADJ input with an external resistor divider. The VADJ pin has a nominal 0.5V threshold; by selecting appropriate R1/R2 values (e.g., 237kΩ/100kΩ per Table 2 in the datasheet), the trip point scales to 1.2V at 5% tolerance. The device's ±1.5% accuracy and guaranteed operation down to VMAX ≥ 1V make it suitable for such low-voltage monitoring.
What is the function of the VCC pin on the LTC2906ITS8#TRMPBF?
The VCC pin on the LTC2906ITS8#TRMPBF serves as an optional auxiliary power input. Its primary role is to ensure RST output functionality when the main V1 supply is absent or below 1V. Internally, VMAX = max(V1, VCC) powers the reset logic and output drivers. If V1 is present and ≥1V, VCC is redundant; if V1 drops out, VCC ≥1V maintains guaranteed RST assertion - critical for fail-safe system behavior.
Is the LTC2906ITS8#TRMPBF pin-compatible with the LTC2907ITS8#TRMPBF?
No, the LTC2906ITS8#TRMPBF is not pin-compatible with the LTC2907ITS8#TRMPBF. Although both share the same TSOT-23-8 package and pin 1–4 assignments, Pin 2 is RST (output) on the LTC2906ITS8#TRMPBF but TMR (timing capacitor input) on the LTC2907ITS8#TRMPBF. Swapping them would disconnect the reset signal or misconfigure the timing circuit. The datasheet block diagrams (pages 7–8) and pin function tables (page 6) confirm this functional difference.
LTC2906ITS8#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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2906ITS8#TRMPBF FAQ
1.How can I place an order for LTC2906ITS8#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2906ITS8#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 LTC2906ITS8#TRMPBF reliable?
The price and inventory of LTC2906ITS8#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2906ITS8#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2906ITS8#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2906ITS8#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2906ITS8#TRMPBF?
LTC2906ITS8#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2906ITS8#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 LTC2906ITS8#TRMPBF?
For technical support, including LTC2906ITS8#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2906ITS8#TRMPBF requirements.
6.How does Aetrix verify that LTC2906ITS8#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2906ITS8#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 LTC2906ITS8#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2906ITS8#TRMPBF?
All LTC2906ITS8#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2906ITS8#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 LTC2906ITS8#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2906ITS8#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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