My Inquiry
My Account
Analog Devices Inc. LTC1726EMS8-2.5#TRPBF
- Part No.:
- LTC1726EMS8-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1726EMS8-2.5#TRPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,755
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1726EMS8-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a micropower triple supply monitor and microprocessor supervisory IC designed for systems requiring simultaneous monitoring of 2.5V, 3.3V, and an adjustable voltage rail. It features ±1.5% threshold accuracy over temperature, adjustable reset timeout (via RT pin capacitor), adjustable watchdog timeout (via WT pin capacitor), and guaranteed RST assertion down to VCC3 ≥ 1V or VCC25 ≥ 1V - enabling reliable power-up sequencing in portable battery-powered equipment.
For engineers reviewing the LTC1726EMS8-2.5#TRPBF datasheet, LTC1726EMS8-2.5#TRPBF pinout, LTC1726EMS8-2.5#TRPBF application, or LTC1726EMS8-2.5#TRPBF equivalent, key selection criteria include its 2.5V/3.3V/ADJ monitoring configuration, 16µA typical supply current, MS8 package compatibility with space-constrained PCB layouts, and open-drain active-low RST output with weak internal pull-up to VCC3.
Technical Context
The LTC1726EMS8-2.5#TRPBF implements independent comparator-based sensing on VCC25 (2.5V nominal), VCC3 (3.3V nominal), and VCCA (adjustable, 1V nominal), with trip thresholds of 2.337V, 3.085V, and 0.985V respectively at TA = 25°C. Reset assertion occurs when any monitored supply falls below its threshold, and remains asserted for a user-defined delay set by CRT capacitance on the RT pin.
Its watchdog function monitors µP activity via WDI edge transitions; failure to clear the timer within the CWT-defined period triggers reset. The device derives operating power from whichever of VCC25 or VCC3 is higher, ensuring RST remains valid during brownout and power-up transients - critical for deterministic system initialization in notebook computers and intelligent instruments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC25 Threshold | 2.337V (±1.5% over temp); ensures accurate 2.5V rail supervision without false resets |
| VCC3 Threshold | 3.085V (±1.5% over temp); matches standard 3.3V LDO outputs with tight tolerance |
| VCCA Threshold | 0.985V (±1.5% over temp); supports precise monitoring of adjustable or low-voltage rails |
| Supply Current | 16µA typical; enables use in always-on, battery-critical applications like portable medical devices |
| RST Output Type | Active-low open-drain with weak 6µA internal pull-up to VCC3; allows flexible logic-level interfacing |
| Reset Timeout Range | Adjustable from ~5ms to >1s via CRT capacitor (tRT = 3.30 × CRT); accommodates diverse µP startup times |
| Watchdog Timeout Range | Adjustable from ~33ms to >1s via CWT capacitor (tWT = 21.8 × CWT); aligns with software execution cycles |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, –40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC3 (Pin 1) | 3.3V supply sense input & primary power source | Senses 3.3V rail; powers internal circuitry when ≥ VCC25; requires 0.1µF bypass to GND |
| VCC25 (Pin 2) | 2.5V supply sense input & alternate power source | Senses 2.5V rail; powers device if > VCC3; must be bypassed with 0.1µF ceramic capacitor |
| VCCA (Pin 3) | Adjustable voltage sense input (1V nominal) | Monitors user-defined rail (e.g., DC/DC feedback node); high-impedance input, can tie to VCC3 or VCC25 if unused |
| GND (Pin 4) | Analog and digital ground reference | Common return path for all comparators and timing circuits; must connect to clean system ground |
| WDI (Pin 5) | Watchdog input trigger | Edge-sensitive (rising/falling); clears watchdog timer; must be driven by µP I/O or grounded to disable |
| RST (Pin 6) | Active-low reset output | Open-drain output asserted low during fault or timeout; weak internal pull-up to VCC3; external pull-up required for 5V logic |
| WT (Pin 7) | Watchdog timeout timing input | Connect capacitor to GND to set tWT = 21.8 × CWT (µs); grounding disables watchdog |
| RT (Pin 8) | Reset timeout timing input | Connect capacitor to GND to set tRT = 3.30 × CRT (µs); determines minimum reset pulse width after power-up |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring with fixed 2.5V/3.3V and adjustable rail | Enables single-chip supervision of mixed-voltage SoC platforms without external resistive dividers |
| ±1.5% threshold accuracy over full temperature range | Eliminates need for calibration; guarantees reliable reset under thermal stress in industrial environments |
| Adjustable reset and watchdog timeouts via external capacitors | Supports design flexibility across µP families - no firmware or hardware changes needed to adjust timing |
| Glitch-immune comparators with 130µs undervoltage response | Rejects short-duration supply dips that could cause spurious resets in noisy power systems |
| 16µA typical quiescent current | Extends battery life in always-on portable instrumentation and IoT edge nodes |
Applications
| Desktop Computers | Notebook Computers |
|---|---|
Use Scenario: Monitoring ATX 3.3V, 2.5V (CPU core), and adjustable VRM feedback voltage during cold boot and thermal throttling. IC Role / Device Role / Timing Role: Triple-supply supervisor asserting RST until all rails stabilize, then holding reset for 155ms to meet Intel PCH requirements. Use Value: Prevents CPU lockup due to premature release of reset when 2.5V rail lags 3.3V during power-up sequencing. |
Use Scenario: Supervising 3.3V I/O, 2.5V DDR interface, and adjustable 1.8V GPU core rail in ultra-thin clamshell designs. IC Role / Device Role / Timing Role: Low-current (16µA) supervisor enabling long standby battery life while guaranteeing RST assertion during brownout events. Use Value: Maintains system integrity during brief AC adapter disconnects without draining coin-cell backup. |
| Intelligent Instruments | Portable Battery-Powered Equipment |
Use Scenario: Validating 3.3V MCU supply, 2.5V precision ADC reference, and adjustable 1.2V sensor bias rail in handheld multimeters. IC Role / Device Role / Timing Role: High-accuracy (±1.5%) supervisor ensuring measurement validity before enabling analog front-end calibration routines. Use Value: Avoids corrupted calibration data caused by marginal supply conditions during battery discharge. |
Use Scenario: Monitoring 3.3V BLE SoC, 2.5V PMIC output, and adjustable 1.5V display driver rail in wearable health monitors. IC Role / Device Role / Timing Role: Watchdog-enabled supervisor detecting firmware hangs during sensor fusion processing loops. Use Value: Recovers unresponsive devices autonomously without user intervention or physical reset button. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1326-2.5 | ±0.75% threshold accuracy; fixed 2.363V/3.118V/1.0V thresholds; no adjustable watchdog | Higher accuracy but less flexible timing; no WDI input - suitable only where watchdog is unnecessary | Select LTC1326-2.5 when absolute threshold precision outweighs need for programmable watchdog behavior |
| LTC1727-2.5 | Individual open-drain RST outputs per supply (RST3, RST25, RSTA); same ±1.5% accuracy and timing adjustability | Enables supply-specific fault isolation and selective reset assertion - not possible with shared RST of LTC1726EMS8-2.5#TRPBF | Choose LTC1727-2.5 when diagnostics require identifying which specific rail failed, not just overall system reset |
Compared with LTC1326-2.5, the LTC1726EMS8-2.5#TRPBF trades threshold precision for watchdog functionality and timing adjustability; compared with LTC1727-2.5, it offers cost and board-space savings via single RST output but lacks per-rail fault visibility.
Availability
LTC1726EMS8-2.5#TRPBF is available at Aetrix Electronics and suitable for notebook computers, portable battery-powered equipment, and intelligent instruments requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LTC1726EMS8-2.5#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 acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for legacy Linear parts including the LTC1726 family.
The LTC1726 series was designed specifically for high-reliability, low-power multi-rail supervision in computing and instrumentation - emphasizing accuracy, glitch immunity, and flexible timing without sacrificing quiescent current.
FAQ
What is the exact supply voltage monitoring configuration of the LTC1726EMS8-2.5#TRPBF?
The LTC1726EMS8-2.5#TRPBF is factory-configured to monitor three specific rails: VCC25 (2.5V nominal, 2.337V threshold), VCC3 (3.3V nominal, 3.085V threshold), and VCCA (adjustable, 0.985V threshold). This configuration is distinct from the LTC1726EMS8-5#TRPBF, which monitors 5V/3.3V/ADJ. The LTC1726EMS8-2.5#TRPBF cannot be reconfigured to monitor 5V instead of 2.5V.
How does the LTC1726EMS8-2.5#TRPBF ensure correct RST behavior during power-up when both 2.5V and 3.3V supplies ramp at different rates?
The LTC1726EMS8-2.5#TRPBF guarantees RST remains asserted until both VCC25 and VCC3 exceed their respective thresholds (2.337V and 3.085V), then holds reset for the user-defined timeout set by the CRT capacitor on the RT pin. Its dual-supply power architecture - drawing current from whichever of VCC25 or VCC3 is higher - ensures RST stays valid even if one rail rises significantly slower than the other.
Can the watchdog function of the LTC1726EMS8-2.5#TRPBF be disabled without modifying the PCB layout?
Yes. To disable the watchdog function of the LTC1726EMS8-2.5#TRPBF, connect both the WDI (Pin 5) and WT (Pin 7) terminals directly to GND. This configuration disables watchdog timing while preserving full triple-supply monitoring and adjustable reset timeout functionality - no PCB changes beyond jumpering two pins are required.
What is the minimum operating voltage required for the LTC1726EMS8-2.5#TRPBF to assert a valid RST signal?
The LTC1726EMS8-2.5#TRPBF guarantees correct RST logic state (low) for VCC3 ≥ 1V or VCC25 ≥ 1V. Below 1V on both inputs, RST behavior is undefined. This 1V minimum ensures robust reset assertion during brownout conditions well before most 2.5V or 3.3V logic circuits lose functionality.
Does the LTC1726EMS8-2.5#TRPBF support monitoring an adjustable rail higher than 1.8V?
Yes. While the VCCA input has a nominal 1V threshold, it is designed for use with external resistor dividers to scale higher voltages (e.g., 5V, 12V) down to the 1V detection range. The LTC1726EMS8-2.5#TRPBF datasheet provides example circuits using precision resistors (e.g., R1 = 1.07MΩ, R2 = 105kΩ) to monitor 12V rails with ±0.17V trip accuracy - confirming direct support for scaled high-voltage rails.
LTC1726EMS8-2.5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.337V, 3.085V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC1726EMS8-2.5#TRPBF FAQ
1.How can I place an order for LTC1726EMS8-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1726EMS8-2.5#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 LTC1726EMS8-2.5#TRPBF reliable?
The price and inventory of LTC1726EMS8-2.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1726EMS8-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1726EMS8-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1726EMS8-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1726EMS8-2.5#TRPBF?
LTC1726EMS8-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1726EMS8-2.5#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 LTC1726EMS8-2.5#TRPBF?
For technical support, including LTC1726EMS8-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1726EMS8-2.5#TRPBF requirements.
6.How does Aetrix verify that LTC1726EMS8-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1726EMS8-2.5#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 LTC1726EMS8-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1726EMS8-2.5#TRPBF?
All LTC1726EMS8-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1726EMS8-2.5#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 LTC1726EMS8-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LTC1726EMS8-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1726EMS8-2.5#TRPBF Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
