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Analog Devices Inc. LTC2934CTS8-2#TRPBF
- Part No.:
- LTC2934CTS8-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2934CTS8-2#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,136
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Product details
Overview
LTC2934CTS8-2#TRPBF from Analog Devices (formerly Linear Technology) is an ultra-low power adjustable voltage supervisor IC with active-pull-up reset and power-fail outputs, 500nA quiescent current, ±1.5% threshold accuracy over temperature, and 1.6V to 5.5V supply operation - used for battery-powered system initialization and controlled shutdown in portable electronics.
For engineers reviewing the LTC2934CTS8-2#TRPBF datasheet, LTC2934CTS8-2#TRPBF pinout, LTC2934CTS8-2#TRPBF application, or LTC2934CTS8-2#TRPBF equivalent, key selection criteria include its 0.4V internal comparator reference, selectable 15ms/200ms reset timeout via RT pin, TSOT-23-8 package, and active-pull-up RST/PFO outputs eliminating external pull-ups.
Technical Context
The LTC2934CTS8-2#TRPBF integrates two independent precision comparators with 0.4V reference, hysteresis (5% on ADJ, 2.5% on PFI), and a programmable reset timer. Its ADJ and PFI inputs accept resistive dividers to set falling thresholds independently - enabling early power-fail warning before system reset.
It features dual output logic: RST and PFO are actively pulled up to VCC (not open-drain), supporting direct interfacing with CMOS logic without external resistors. The MR input includes internal 900kΩ pull-up and 20μs minimum pulse width requirement for manual reset assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 500nA typical - enables multi-year battery life in coin-cell applications. |
| Supply Voltage Range | 1.6V to 5.5V - supports single-cell Li-ion, alkaline, and coin-cell systems. |
| Threshold Accuracy | ±1.5% max over –40°C to 85°C - ensures reliable reset timing across industrial temperature range. |
| Reset Timeout Options | 15ms (RT = GND) or 200ms (RT = VCC) - configurable via single pin for fast or robust initialization. |
| Power-Fail Threshold Hysteresis | 10mV typical - prevents chatter during brownout recovery with 2.5% rising-edge margin. |
| Output Type | Active pull-up (LTC2934-2 variant) - drives RST/PFO high to VCC without external components. |
| Input Leakage Current | ±1nA max on ADJ/PFI - minimizes divider error; supports >8MΩ resistor networks. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (2.9mm × 1.6mm × 0.9mm), RoHS-compliant, lead-free finish, exposed pad not present (TSOT-23 variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Accepts 1.6V–5.5V; requires 0.1μF bypass capacitor to GND for noise immunity. |
| MR | Manual reset input | Pull low to force RST low; internal 900kΩ pull-up to VCC; 20μs min pulse width. |
| RST | Reset output | Active pull-up to VCC; asserts low when ADJ falls below 0.4V; releases after hysteresis + timeout. |
| PFO | Power-fail output | Active pull-up to VCC; asserts low when PFI falls below 0.4V; releases at 0.4V + 2.5% hysteresis. |
| ADJ | Reset threshold adjustment input | Resistive divider node; sets falling reset threshold; 0.4V reference with 20mV hysteresis. |
| PFI | Power-fail threshold adjustment input | Resistive divider node; sets early-warning threshold; 0.4V reference with 10mV hysteresis. |
| RT | Reset timeout selection input | Tie to GND for 15ms timeout, VCC for 200ms timeout; no external pull required. |
| GND | Ground reference | Primary return path for all internal circuits and external divider networks. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA typical - reduces standby current by >10× vs legacy supervisors, critical for coin-cell lifetime. |
| Independent ADJ/PFI thresholds | Enables separate reset (e.g., 1.6V) and power-fail (e.g., 1.7V) points - supports staged shutdown sequencing. |
| Active-pull-up outputs | Eliminates need for external pull-up resistors on RST/PFO - saves board space and simplifies BOM. |
| Configurable reset timeout | 15ms or 200ms via RT pin - balances fast boot time against noise immunity in noisy environments. |
| High-accuracy comparator reference | 0.4V ±1.5% over temperature - ensures consistent threshold behavior without calibration. |
| Low-input-leakage monitoring | ±1nA max on ADJ/PFI - allows use of high-value resistors (>1MΩ), minimizing divider current drain. |
Applications
| Portable Medical Sensors | Wireless IoT Endpoints |
|---|---|
Use Scenario: Coin-cell-powered wearable ECG sensor operating for 3+ years between battery replacements. IC Role / Device Role / Timing Role: LTC2934CTS8-2#TRPBF monitors battery voltage, triggers PFO at 2.6V for data save, then asserts RST at 2.4V to halt operation. Use Value: 500nA ICC extends battery life; active-pull-up outputs interface directly with ultra-low-power MCU GPIOs without pull resistors. |
Use Scenario: Battery-operated LoRaWAN node transmitting sensor data every 15 minutes in remote agriculture monitoring. IC Role / Device Role / Timing Role: LTC2934CTS8-2#TRPBF provides early power-fail warning (PFO) at 2.7V to initiate flash write before brownout, then resets MCU at 2.55V. Use Value: Independent ADJ/PFI thresholds enable precise staging of shutdown actions; 15ms timeout ensures rapid reinitialization after wake-up. |
| Point-of-Sale Terminals | Security System Peripherals |
Use Scenario: Handheld POS terminal using alkaline AA batteries with variable load-induced voltage sag. IC Role / Device Role / Timing Role: LTC2934CTS8-2#TRPBF supervises main 3.3V rail, asserting PFO at 3.19V to suspend transactions, then RST at 2.99V to prevent corrupted memory writes. Use Value: ±1.5% threshold accuracy prevents false resets during transient sags; TSOT-23-8 footprint fits tight PCB layouts. |
Use Scenario: Battery-backed door/window sensor in home security system requiring >5-year shelf life. IC Role / Device Role / Timing Role: LTC2934CTS8-2#TRPBF monitors backup CR2032 cell, generating PFO at 2.72V to trigger NMI interrupt for EEPROM state save, then RST at 2.55V. Use Value: Low 1.6V operating voltage supports full functionality down to end-of-life battery voltage; MR pin enables tamper-reset via physical switch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2935CTS8-2#TRPBF | Same 500nA ICC and TSOT-23-8 package, but offers eight pin-selectable thresholds (vs adjustable via external resistors). | Best for fixed-threshold designs where resistor network trimming is undesirable; lacks independent PFI/ADJ configuration flexibility. | Select LTC2935CTS8-2#TRPBF when standardized thresholds simplify qualification; retain LTC2934CTS8-2#TRPBF for custom voltage staging. |
| LTC2909CMS8#TRPBF | Higher ICC (2.5μA), adds UV/OV monitoring and shunt-regulated VCC, but same 0.4V reference and active-pull-up outputs. | Suitable for systems needing both undervoltage and overvoltage protection; larger MS8 package increases footprint. | Choose LTC2909CMS8#TRPBF if OV detection is required; LTC2934CTS8-2#TRPBF remains optimal for pure ultra-low-power UV supervision. |
Compared with LTC2935CTS8-2#TRPBF and LTC2909CMS8#TRPBF, the LTC2934CTS8-2#TRPBF uniquely balances sub-μA quiescent current, fully independent ADJ/PFI threshold setting, and minimal TSOT-23 footprint - making it the most efficient choice for battery-critical, multi-stage brownout management.
Availability
LTC2934CTS8-2#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, wireless IoT endpoints, and point-of-sale terminals requiring stable component supply across long production lifecycles.
Supply support for LTC2934CTS8-2#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2934 belongs to Linear's ultralow-power supervisor family, designed specifically for energy-constrained battery-operated systems requiring precise, staged voltage monitoring and controlled shutdown.
FAQ
What is the operating temperature range for the LTC2934CTS8-2#TRPBF?
The LTC2934CTS8-2#TRPBF is rated for 0°C to 70°C ambient operation (Commercial grade). Its electrical specifications - including ±1.5% threshold accuracy and 500nA quiescent current - are guaranteed across this full range, making it suitable for indoor consumer and industrial edge devices without extended thermal stress.
How does the RT pin configure reset timeout on the LTC2934CTS8-2#TRPBF?
The RT pin on the LTC2934CTS8-2#TRPBF selects between two factory-trimmed timeout periods: connecting RT to GND yields 15ms, while connecting RT to VCC yields 200ms. This selection occurs after the ADJ input rises above threshold and determines how long RST remains low before releasing - critical for balancing startup speed versus noise immunity.
Can the LTC2934CTS8-2#TRPBF monitor two different supply rails simultaneously?
Yes - the LTC2934CTS8-2#TRPBF can supervise two independent voltages using separate resistive dividers on ADJ (for reset) and PFI (for power-fail warning). Each input references the same 0.4V comparator, so thresholds scale linearly with divider ratios; design examples in the datasheet show dual-rail configurations with no additional ICs required.
What is the maximum supply voltage the LTC2934CTS8-2#TRPBF can tolerate?
The LTC2934CTS8-2#TRPBF has an absolute maximum VCC rating of 6V, but its functional operating range is specified from 1.6V to 5.5V. Operating above 5.5V risks permanent damage; for 5V systems, it delivers full performance with 500nA ICC and ±1.5% accuracy - verified across temperature and process corners.
Does the LTC2934CTS8-2#TRPBF require external pull-up resistors on RST and PFO?
No - the LTC2934CTS8-2#TRPBF uses active pull-up outputs (unlike the -1 variant), meaning RST and PFO are driven high to VCC internally. This eliminates external pull-up resistors, reducing BOM count and board area. When outputs are high, only leakage current flows - typically <1nA - preserving ultra-low power operation.
LTC2934CTS8-2#TRPBF 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:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2934CTS8-2#TRPBF FAQ
1.How can I place an order for LTC2934CTS8-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2934CTS8-2#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 LTC2934CTS8-2#TRPBF reliable?
The price and inventory of LTC2934CTS8-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2934CTS8-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2934CTS8-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2934CTS8-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2934CTS8-2#TRPBF?
LTC2934CTS8-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2934CTS8-2#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 LTC2934CTS8-2#TRPBF?
For technical support, including LTC2934CTS8-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2934CTS8-2#TRPBF requirements.
6.How does Aetrix verify that LTC2934CTS8-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2934CTS8-2#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 LTC2934CTS8-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2934CTS8-2#TRPBF?
All LTC2934CTS8-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2934CTS8-2#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 LTC2934CTS8-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC2934CTS8-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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