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Analog Devices Inc. LTC2934ITS8-1#TRMPBF
- Part No.:
- LTC2934ITS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2934ITS8-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2934ITS8-1#TRMPBF from Analog Devices (formerly Linear Technology) is an ultra-low power, adjustable voltage supervisor IC with independent power-fail and reset functions, 500nA typical quiescent current, ±1.5% threshold accuracy over temperature, and 15ms/200ms selectable reset timeout - designed for battery-powered portable equipment requiring early low-voltage warning and reliable system initialization.
For engineers reviewing the LTC2934ITS8-1#TRMPBF datasheet, LTC2934ITS8-1#TRMPBF pinout, LTC2934ITS8-1#TRMPBF application, or LTC2934ITS8-1#TRMPBF equivalent, key selection criteria include its open-drain PFO/RST outputs, –40°C to 85°C industrial temperature range, TSOT-23-8 package, adjustable 0.4V reference-based thresholds, and manual reset input with internal 900kΩ pull-up.
Technical Context
The LTC2934ITS8-1#TRMPBF integrates two independent comparators: one monitoring ADJ for reset generation (with 5% hysteresis on rising edge), and another monitoring PFI for power-fail detection (with 2.5% hysteresis). Its internal reset timer initiates only after ADJ exceeds threshold +5%, ensuring stable release of RST.
It uses a fixed 0.4V internal reference for both ADJ and PFI inputs, enabling precise external resistor-divider configuration of falling thresholds down to 1.6V supply operation. The RT pin selects between 15ms and 200ms reset timeout periods, while MR provides pushbutton-initiated manual reset with 20μs minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 1.6V to 5.5V - supports direct connection to single-cell Li-ion, alkaline, or coin-cell batteries without regulation. |
| Quiescent Current | 500nA typical - enables multi-year battery life in always-on monitoring applications. |
| Threshold Accuracy | ±1.5% max over –40°C to 85°C - ensures consistent reset/power-fail triggering across industrial temperature range. |
| ADJ/PFI Threshold | 0.4V ±6mV - fixed internal reference allows predictable external divider design with minimal error contribution. |
| Reset Timeout | Selectable 15ms or 200ms via RT pin - accommodates fast microcontroller startup or extended power-down sequencing. |
| Output Type | Open-drain RST and PFO - permits level-shifting pull-ups up to 5.5V, independent of VCC. |
| Manual Reset Input | MR with 900kΩ internal pull-up - eliminates external biasing; accepts pushbutton-to-GND interface with no additional components. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (2.9mm × 1.6mm × 0.8mm), RoHS-compliant, lead-free finish, rated for –40°C to 85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 1.6V–5.5V; requires 0.1μF decoupling to GND for noise immunity. |
| MR | Manual reset input | Pull low to force RST assertion; internally pulled up to VCC via 900kΩ; 20μs minimum pulse width. |
| RST | Reset output | Open-drain active-low output; sinks ≥200μA at 100mV VOL; requires external pull-up. |
| PFO | Power-fail output | Open-drain active-low output; asserts when PFI falls below 0.4V; releases at 0.4V + 2.5% hysteresis. |
| ADJ | Reset threshold adjustment input | Connected to resistive divider; monitors falling voltage; triggers RST when <0.4V; rising hysteresis = 5%. |
| PFI | Power-fail threshold adjustment input | Connected to resistive divider; triggers PFO when <0.4V; rising hysteresis = 2.5% for glitch immunity. |
| RT | Reset timeout selection input | Tie to GND for 15ms timeout, tie to VCC for 200ms timeout; no external pull required. |
| GND | Device ground reference | Common return path for all analog and digital circuitry; must be low-impedance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA typical enables >10-year battery life in coin-cell–powered security sensors. |
| Independent dual-threshold supervision | Separate ADJ and PFI inputs allow distinct reset (e.g., 1.6V) and power-fail (e.g., 2.7V) thresholds using one IC. |
| Configurable reset timeout | 15ms or 200ms selection via RT pin eliminates need for external timing capacitors or logic. |
| Open-drain outputs with high-voltage tolerance | RST and PFO support pull-up voltages up to 5.5V - compatible with mixed-voltage systems (e.g., 1.8V core + 3.3V I/O). |
| Integrated manual reset pull-up | 900kΩ internal MR pull-up removes external resistor, reducing BOM count and PCB area in space-constrained designs. |
Applications
| Portable Equipment | Battery-Powered Security Systems |
|---|---|
Use Scenario: Handheld medical diagnostic device powered by two AA alkaline cells with variable discharge profile. IC Role / Device Role / Timing Role: LTC2934ITS8-1#TRMPBF monitors battery voltage via ADJ divider and asserts RST before brownout, preventing corrupted memory writes during shutdown. Use Value: 500nA ICC extends operational life beyond 3 years; ±1.5% threshold accuracy ensures consistent reset at 1.606V across temperature extremes. |
Use Scenario: Wireless door/window sensor using CR2032 coin cell with RF transmission triggered on alarm event. IC Role / Device Role / Timing Role: LTC2934ITS8-1#TRMPBF drives PFO to MCU NMI pin upon voltage drop below 2.727V, initiating controlled data save and sleep mode entry. Use Value: Early PFO warning at 2.727V (vs. 2.553V RST) provides ≥200ms margin for nonvolatile storage before critical undervoltage. |
| Point-of-Sale Terminals | Wireless Sensor Nodes |
Use Scenario: Battery-backed POS terminal with backup SRAM and real-time clock requiring clean power sequencing. IC Role / Device Role / Timing Role: LTC2934ITS8-1#TRMPBF configures ADJ for 1.6V reset and PFI for 2.628V power-fail, coordinating LDO shutdown and memory write-enable disable. Use Value: Independent hysteresis (5% on ADJ, 2.5% on PFI) prevents chatter during load transients common in thermal printer actuation. |
Use Scenario: LoRaWAN environmental node powered by Li-SOCl₂ primary cell operating in remote industrial sites. IC Role / Device Role / Timing Role: LTC2934ITS8-1#TRMPBF monitors main rail and asserts PFO to wake MCU for final telemetry upload prior to deep discharge. Use Value: TSOT-23-8 footprint fits 8mm × 8mm PCB area constraint; –40°C to 85°C rating ensures reliability in uncontrolled outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2935ITS8-1#TRMPBF | Same 500nA ICC and TSOT-23-8 package, but offers eight pin-selectable thresholds (no external resistors needed); lacks manual reset (MR) pin. | Suitable where fixed thresholds suffice and board space is premium; not usable where pushbutton-initiated reset is required. | Choose LTC2934ITS8-1#TRMPBF when adjustable thresholds and MR functionality are mandatory. |
| TPS3808G15DBVR | Higher 800nA ICC; fixed 1.5V reset threshold; no power-fail output; 5-pin SOT-23 package. | Only provides basic reset - cannot replace dual-output, adjustable-threshold function of LTC2934ITS8-1#TRMPBF. | Choose LTC2934ITS8-1#TRMPBF when early power-fail warning and independent threshold tuning are essential. |
Compared with LTC2935ITS8-1#TRMPBF, the LTC2934ITS8-1#TRMPBF trades pin-selectable convenience for full adjustability and MR support; compared with TPS3808G15DBVR, it delivers true dual-output supervision with sub-μA power and precision hysteresis - critical for long-life, multi-rail battery systems.
Availability
LTC2934ITS8-1#TRMPBF is available at Aetrix Electronics and suitable for portable equipment, battery-powered security systems, and wireless sensor nodes requiring stable component supply with guaranteed long-term industrial temperature support.
Supply support for LTC2934ITS8-1#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 full product support, documentation, and manufacturing continuity for all Linear-supervised devices.
The LTC2934ITS8-1#TRMPBF belongs to Linear's ultralow-power supervisor family, engineered specifically for energy-constrained battery-operated systems demanding precision voltage monitoring and deterministic reset behavior.
FAQ
What is the operating temperature range for the LTC2934ITS8-1#TRMPBF?
The LTC2934ITS8-1#TRMPBF is specified for –40°C to +85°C ambient operation, making it suitable for industrial and outdoor battery-powered applications. This rating is confirmed in the "ORDER INFORMATION" table of the datasheet, where the "I" grade denotes the industrial temperature range, and the TSOT-23 package has θJA = 195°C/W.
Does the LTC2934ITS8-1#TRMPBF support both reset and power-fail outputs simultaneously?
Yes, the LTC2934ITS8-1#TRMPBF provides two independent open-drain outputs: RST for system reset and PFO for early power-fail warning. Each is driven by a separate comparator (ADJ and PFI inputs), allowing distinct falling thresholds and hysteresis values - a capability verified in the "DESCRIPTION" and "FEATURES" sections of the datasheet.
How is the reset timeout period selected on the LTC2934ITS8-1#TRMPBF?
The reset timeout period on the LTC2934ITS8-1#TRMPBF is selected via the RT pin: connect RT to GND for 15ms timeout, or to VCC for 200ms timeout. This is explicitly defined in the "ELECTRICAL CHARACTERISTICS" table (tRST parameter) and illustrated in the "TYPICAL APPLICATIONS" schematic TA01b.
Can the LTC2934ITS8-1#TRMPBF operate from a 1.6V supply?
Yes, the LTC2934ITS8-1#TRMPBF operates down to 1.6V VCC, as stated in the "ELECTRICAL CHARACTERISTICS" table under VCC MIN. This enables direct interfacing with single-cell LiFePO₄ or deeply discharged alkaline sources without pre-regulation.
Is the manual reset input (MR) of the LTC2934ITS8-1#TRMPBF internally pulled up?
Yes, the MR pin of the LTC2934ITS8-1#TRMPBF includes a 900kΩ internal pull-up resistor to VCC, as documented in the "ELECTRICAL CHARACTERISTICS" table (RPU parameter) and "PIN FUNCTIONS" section - eliminating the need for an external pull-up in standard pushbutton implementations.
LTC2934ITS8-1#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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- 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:
- TSOT-23-8
LTC2934ITS8-1#TRMPBF FAQ
1.How can I place an order for LTC2934ITS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2934ITS8-1#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 LTC2934ITS8-1#TRMPBF reliable?
The price and inventory of LTC2934ITS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2934ITS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2934ITS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2934ITS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2934ITS8-1#TRMPBF?
LTC2934ITS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2934ITS8-1#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 LTC2934ITS8-1#TRMPBF?
For technical support, including LTC2934ITS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2934ITS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2934ITS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2934ITS8-1#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 LTC2934ITS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2934ITS8-1#TRMPBF?
All LTC2934ITS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2934ITS8-1#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 LTC2934ITS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2934ITS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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