My Inquiry
My Account
Analog Devices Inc. LTC1326IMS8-2.5#PBF
- Part No.:
- LTC1326IMS8-2.5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1326IMS8-2.5#PBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:231
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1326IMS8-2.5#PBF from Analog Devices (formerly Linear Technology) is a micropower precision triple supply monitor IC designed for systems requiring simultaneous supervision of 2.5V, 3.3V, and an adjustable supply (VCCA). It delivers ±0.75% threshold accuracy, 20µA typical supply current, 200ms internal reset delay, and active-low/open-drain RST/SRST outputs. It is used in portable battery-powered equipment to ensure reliable power-on reset and brownout protection.
For engineers reviewing the LTC1326IMS8-2.5#PBF datasheet, LTC1326IMS8-2.5#PBF pinout, LTC1326IMS8-2.5#PBF application, or LTC1326IMS8-2.5#PBF equivalent, key selection considerations include its guaranteed reset assertion down to VCC3 ≥ 1V or VCC25 ≥ 1V, manual push-button soft/hard reset capability, and glitch-immune triple-supply monitoring architecture.
Technical Context
The LTC1326IMS8-2.5#PBF integrates three precision voltage comparators with 13µs typical response time to suppress transients, a 200ms reset timer, and dual-mode push-button logic that generates either a 100µs soft reset (SRST) or a full 200ms hard reset (RST) based on PBR assertion duration. Its gate drive circuitry selects between VCC3 and VCC25 to ensure RST remains valid down to 1V on either rail.
It supports flexible configuration as a dual- or single-supply monitor via override functions: VCC25 trip point is disabled when tied within ±25mV of VCC3 below ~4.15V, and VCCA can be strapped to VCC3 or VCC25 to disable its 1V threshold input. All outputs are open-drain with weak internal 6µA pull-ups to VCC3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC25 Threshold | 2.363V (typ), ±0.75% accuracy ensures precise 2.5V rail monitoring across temperature |
| VCC3 Threshold | 3.118V (typ), tight tolerance prevents false resets during 3.3V supply ripple |
| VCCA Threshold | 1.000V (typ), enables low-voltage logic or DC/DC feedback monitoring |
| Supply Current | 20µA (typ), enables long battery life in portable instrumentation |
| Reset Delay | 200ms (nominal), meets standard power-up sequencing requirements |
| Soft Reset Width | 100µs (typ), allows microprocessor reset without disturbing DRAM refresh |
| Operating Temp | –40°C to +85°C (I-grade), suitable for industrial embedded environments |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm footprint, 0.65mm pitch, θJA = 250°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC3 (Pin 1) | 3.3V sense input & IC power supply | Bypassed with ≥0.1µF capacitor; powers internal circuitry and provides pull-up reference for RST/SRST |
| VCC25 (Pin 2) | 2.5V sense input | Used as gate drive source for RST FET when VCC25 > VCC3; must be connected for 2.5V monitoring |
| VCCA (Pin 3) | Adjustable 1V threshold input | High-impedance comparator input for custom supply or logic-level detection; can be tied to VCC3/VCC25 to disable |
| GND (Pin 4) | Ground reference | Common return for all supplies and outputs; requires low-impedance PCB connection |
| RST (Pin 5) | Active-high CMOS reset output | Buffered complement of Pin 6; drives high to VCC3; asserted low only when pulled externally |
| RST (Pin 6) | Active-low open-drain reset output | Primary reset signal; asserted low during undervoltage or PBR hold >2s; can be OR-tied with other reset sources |
| SRST (Pin 7) | Active-low open-drain soft reset output | Generates 100µs pulse on PBR release <2s; used for non-disruptive processor reset |
| PBR (Pin 8) | Active-low push-button reset input | Internal 7µA pull-up to VCC3; debounced internally; asserts SRST or forces RST based on press duration |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneously supervises 2.5V, 3.3V, and adjustable (1V) rails with independent comparators |
| ±0.75% threshold accuracy | Guarantees reliable reset timing across temperature without external calibration |
| 20µA micropower operation | Enables multi-year battery life in handheld medical or data logging devices |
| Glitch-immune design | 13µs comparator response + 0.1µF bypassing suppresses transient-induced false resets |
| Dual-mode push-button reset | Supports both 100µs soft reset (non-intrusive) and 200ms hard reset (full system initialization) |
Applications
| Desktop Computers | Notebook Computers |
|---|---|
Use Scenario: Monitoring 2.5V core, 3.3V I/O, and adjustable CPU VDD rails during cold boot and thermal throttling. IC Role / Device Role / Timing Role: Triple-supply supervisor providing synchronized power-on reset and brownout detection. Use Value: Prevents firmware corruption by ensuring all rails stabilize before CPU release, leveraging ±0.75% thresholds and 200ms delay. | Use Scenario: Supervising 2.5V DDR memory, 3.3V chipset, and variable GPU core voltage in ultra-thin platforms. IC Role / Device Role / Timing Role: Micropower supply monitor enabling instant-on functionality with minimal standby current draw. Use Value: 20µA quiescent current extends battery runtime; soft reset preserves DRAM state during user-initiated recovery. |
| Intelligent Instruments | Portable Battery-Powered Equipment |
Use Scenario: Validating 2.5V sensor front-end, 3.3V MCU, and programmable 1.0V reference in handheld test meters. IC Role / Device Role / Timing Role: Precision supply supervisor ensuring measurement integrity during battery voltage sag. Use Value: Guaranteed reset assertion down to VCC25 ≥ 1V prevents erroneous readings during low-battery operation. | Use Scenario: Managing power sequencing in portable ultrasound or ECG devices powered by single-cell Li-ion. IC Role / Device Role / Timing Role: Triple-rail monitor with push-button interface for field-service reset without full power cycle. Use Value: 100µs SRST pulse enables safe firmware update restart while preserving real-time patient data buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1726-2.5 | Includes adjustable watchdog timeout; same 2.5V/3.3V/ADJ thresholds but higher 35µA supply current | Required where system-level fault recovery beyond power monitoring is needed | Select LTC1726-2.5 if watchdog timer functionality is mandatory; otherwise LTC1326IMS8-2.5#PBF offers lower power and simpler implementation |
| LTC1727-2.5 | Provides individual open-drain reset outputs per rail (2.338V, 3.086V, 1.0V); ±1.5% threshold accuracy vs ±0.75% | Needed when independent reset control per supply is required for complex power sequencing | Choose LTC1727-2.5 only when rail-specific reset assertion is necessary; LTC1326IMS8-2.5#PBF gives tighter accuracy and unified reset logic |
Compared with LTC1726-2.5 and LTC1727-2.5, the LTC1326IMS8-2.5#PBF delivers superior threshold accuracy (±0.75% vs ±1.5%) and lowest quiescent current (20µA vs 35µA/25µA), making it optimal for cost-sensitive, battery-constrained applications where unified reset behavior suffices.
Availability
LTC1326IMS8-2.5#PBF is available at Aetrix Electronics and suitable for desktop computers, notebook computers, and portable battery-powered equipment requiring stable component supply across industrial temperature ranges.
Supply support for LTC1326IMS8-2.5#PBF 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-performance analog IC portfolio, including precision power management solutions.
The LTC1326IMS8-2.5#PBF belongs to Linear's micropower supply monitor product line, engineered for reliable power sequencing and reset generation in space- and energy-constrained embedded systems.
FAQ
What is the primary function of the LTC1326IMS8-2.5#PBF?
The LTC1326IMS8-2.5#PBF is a micropower triple supply monitor IC that simultaneously supervises 2.5V, 3.3V, and an adjustable 1V supply rail. It asserts reset signals when any monitored voltage falls below its precision threshold, ensuring system reliability during power-up, brownout, or shutdown events. Its design emphasizes low current consumption and high accuracy for portable and industrial applications.
How does the push-button reset feature work on the LTC1326IMS8-2.5#PBF?
The LTC1326IMS8-2.5#PBF uses Pin 8 (PBR) to implement dual-mode reset: a short press (<2 seconds) triggers a 100µs soft reset pulse on SRST (Pin 7), ideal for non-disruptive processor restart; a long press (>2 seconds) forces the main RST output (Pin 6) low for 200ms after release, performing a full system reset. Internal debounce ensures noise immunity.
What are the absolute maximum ratings for the LTC1326IMS8-2.5#PBF supply pins?
The LTC1326IMS8-2.5#PBF specifies absolute maximum ratings of –0.5V to 7V for VCC3, VCC25, VCCA, RST, and SRST pins. The PBR pin tolerates –7V to 7V. Exceeding these limits may cause permanent damage. For reliable operation, VCC3 must remain ≥1V to guarantee correct RST logic state, and VCC25 must be ≥1V for valid 2.5V monitoring.
Can the LTC1326IMS8-2.5#PBF monitor only two supplies instead of three?
Yes - the LTC1326IMS8-2.5#PBF supports flexible configuration. VCCA (Pin 3) can be tied to VCC3 or VCC25 to disable its 1V threshold input. VCC25 (Pin 2) may also be tied to VCC3 to operate as a dual-supply monitor for 3.3V and adjustable rails only. This adaptability allows use in systems with varying supply architectures without redesign.
What package type and thermal characteristics does the LTC1326IMS8-2.5#PBF use?
The LTC1326IMS8-2.5#PBF is housed in an 8-lead plastic MSOP (MS8) package measuring 3.0mm × 3.0mm with 0.65mm lead pitch. Its thermal resistance is θJA = 250°C/W, and maximum junction temperature is 125°C. This compact, surface-mount package supports high-density PCB layouts while maintaining adequate thermal performance in industrial ambient conditions.
LTC1326IMS8-2.5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.363V, 3.118V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC1326IMS8-2.5#PBF FAQ
1.How can I place an order for LTC1326IMS8-2.5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1326IMS8-2.5#PBF 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 LTC1326IMS8-2.5#PBF reliable?
The price and inventory of LTC1326IMS8-2.5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1326IMS8-2.5#PBF is usually 5 days.
3.What payment methods are accepted for LTC1326IMS8-2.5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1326IMS8-2.5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1326IMS8-2.5#PBF?
LTC1326IMS8-2.5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1326IMS8-2.5#PBF 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 LTC1326IMS8-2.5#PBF?
For technical support, including LTC1326IMS8-2.5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1326IMS8-2.5#PBF requirements.
6.How does Aetrix verify that LTC1326IMS8-2.5#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1326IMS8-2.5#PBF 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 LTC1326IMS8-2.5#PBF meets industry standards.
7.What is the process for return or replacement of LTC1326IMS8-2.5#PBF?
All LTC1326IMS8-2.5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1326IMS8-2.5#PBF, 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 LTC1326IMS8-2.5#PBF part is unused and in its original packaging.
Return procedure for LTC1326IMS8-2.5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1326IMS8-2.5#PBF 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…
