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Analog Devices Inc. LTC2935CTS8-1#TRPBF
- Part No.:
- LTC2935CTS8-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2935CTS8-1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2935CTS8-1#TRPBF from Analog Devices (formerly Linear Technology) is an ultra-low power voltage supervisor IC with pin-selectable reset and power-fail thresholds, open-drain RST/PFO outputs, and 500nA typical quiescent current. It provides system initialization, early low-voltage warning, and reset generation for battery-powered portable equipment operating from –40°C to 85°C.
For engineers reviewing the LTC2935CTS8-1#TRPBF datasheet, LTC2935CTS8-1#TRPBF pinout, LTC2935CTS8-1#TRPBF application, or LTC2935CTS8-1#TRPBF equivalent, key selection criteria include its eight binary-configurable reset thresholds (e.g., 2.25V–3.30V), 200ms reset timeout, ±1.5% threshold accuracy over temperature, and TSOT-23-8 package compatibility with space-constrained designs.
Technical Context
The LTC2935CTS8-1#TRPBF integrates dual comparators with precision internal attenuators and hysteresis-5% on RST and 2.5% on PFO-to prevent chatter during supply transients. Its threshold selection logic uses S2/S1/S0 inputs to configure one of eight fixed falling-reset thresholds and corresponding power-fail thresholds (150mV higher).
As an open-drain variant (LTC2935-1), it supports external pull-up voltages up to 5.5V independent of VCC, enabling level-shifting and mixed-voltage system interfacing. The MR input features a 900kΩ internal 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 operation on coin cells without measurable battery drain. |
| Reset Threshold Range | 2.25V to 3.30V (8 pin-selectable values) - covers common Li-ion, alkaline, and coin-cell stack voltages. |
| Power-Fail Threshold Offset | +150mV above selected reset threshold - provides deterministic early-warning margin before reset assertion. |
| Reset Timeout | 200ms after VCC exceeds threshold +5% hysteresis - ensures stable power-up before releasing processor reset. |
| Threshold Accuracy | ±1.5% max over –40°C to 85°C - eliminates need for external calibration in industrial temperature environments. |
| Output Type | Open-drain RST and PFO - allows flexible pull-up to any voltage ≤5.5V, supporting mixed-supply logic interfaces. |
| Package | 8-Lead TSOT-23 (2.9mm × 1.6mm) - surface-mount footprint compatible with high-density portable PCB layouts. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 2.9mm × 1.6mm body, 0.65mm pitch, exposed pad optional for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply and monitored voltage input | Primary voltage rail under supervision; requires 0.1μF bypass capacitor to GND for noise immunity. |
| MR | Manual reset input | Active-low pushbutton interface; internally pulled up to VCC via 900kΩ; asserts RST for 200ms after release. |
| RST | Reset output | Open-drain active-low signal; pulls low when VCC falls below selected threshold; released after 200ms timeout. |
| PFO | Power-fail output | Open-drain active-low early-warning signal; triggers at 150mV above reset threshold; hysteresis = 2.5%. |
| S2, S1, S0 | Threshold selection inputs | Binary-coded inputs (GND/VCC) selecting one of eight reset/power-fail threshold pairs; no external components needed. |
| GND | Ground reference | Common return path for all internal circuits and external decoupling; connects to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA typical - extends battery life in always-on monitoring applications such as security sensors and IoT endpoints. |
| Configurable thresholds | Eight factory-trimmed reset thresholds (2.25V–3.30V) and matching PFO offsets - eliminates external resistor networks and calibration effort. |
| Hysteresis control | 5% on RST, 2.5% on PFO - prevents false triggering during load-induced supply droop or ripple. |
| Glitch-immune comparator | Immunity to <1ms transients <2% amplitude - ensures robust operation in noisy DC/DC converter environments. |
| Wide VCC range | 1V to 5.5V operation - supports direct monitoring of single-cell Li-ion (2.5–4.2V), alkaline (0.9–1.5V × 2–4), and coin-cell (2.0–3.6V) supplies. |
Applications
| Portable Medical Sensors | Wireless Point-of-Sale Terminals |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable low-battery warning and controlled shutdown before data loss. IC Role / Device Role / Timing Role: Voltage supervisor providing early PFO alert at 2.70V and hard RST at 2.55V to trigger EEPROM save and BLE disconnect. Use Value: 500nA ICC preserves >95% of coin cell capacity over 2-year shelf life; open-drain outputs interface directly with 3.3V BLE SoC GPIOs. |
Use Scenario: Battery-backed handheld POS terminal using dual AA alkaline cells, needing deterministic reset during brownout and graceful transaction rollback. IC Role / Device Role / Timing Role: Supervisor asserting PFO at 3.15V to initiate NMI-driven firmware save, then RST at 3.00V if voltage continues falling. Use Value: Pin-selectable thresholds match nominal 3.0V system rail; 200ms reset timeout ensures NAND flash write completion before power collapse. |
| Industrial Security Sensors | Low-Power Wireless Gateways |
Use Scenario: Tamper-detect sensor node powered by Li-SOCl₂ primary cell, operating unattended for 10+ years in remote locations. IC Role / Device Role / Timing Role: Ultra-low-power supervisor monitoring VCC for end-of-life detection and initiating secure erase of encryption keys prior to shutdown. Use Value: ±1.5% threshold accuracy over –40°C to 85°C eliminates seasonal recalibration; TSOT-23 package fits sub-100mm² PCB area budget. |
Use Scenario: LoRaWAN gateway with backup supercapacitor, requiring precise power-fail detection to switch to backup supply before main rail collapse. IC Role / Device Role / Timing Role: Dual-threshold supervisor generating PFO at 2.40V to enable capacitor charge transfer, then RST at 2.25V if transfer fails. Use Value: 150mV PFO-to-RST offset provides ≥10ms hold-up time for seamless switchover; open-drain outputs tolerate 5V backup rail. |
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#TRPBF | Identical functionality and pinout; rated for –40°C to 85°C industrial temperature range vs. 0°C to 70°C for LTC2935CTS8-1#TRPBF. | Required for outdoor or automotive-adjacent deployments where ambient exceeds 70°C. | Select when extended temperature operation is mandatory; otherwise LTC2935CTS8-1#TRPBF suffices for commercial indoor use. |
| LTC2934CTS8-1#TRPBF | Adjustable thresholds via external resistors (not pin-selectable); 400nA ICC; same TSOT-23-8 package and open-drain outputs. | Used where custom threshold values outside the LTC2935's 2.25–3.30V range are required, e.g., 1.8V or 4.1V rails. | Choose LTC2934CTS8-1#TRPBF only if exact threshold tuning is needed; LTC2935CTS8-1#TRPBF offers faster, lower-risk design-in with factory-trimmed accuracy. |
Compared with LTC2935ITS8-1#TRPBF, the LTC2935CTS8-1#TRPBF trades extended temperature capability for lower cost and qualification overhead in commercial environments; versus LTC2934CTS8-1#TRPBF, it delivers superior threshold stability and reduced BOM count by eliminating external resistors.
Availability
LTC2935CTS8-1#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, wireless point-of-sale terminals, and industrial security sensors requiring stable component supply across production lifecycles.
Supply support for LTC2935CTS8-1#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 the LTC portfolio.
The LTC2935CTS8-1#TRPBF belongs to Linear's ultralow-power supervisor family, designed specifically for battery-critical applications where nanoscale current draw and deterministic voltage monitoring are essential to multi-year operation.
FAQ
What is the maximum supply voltage for LTC2935CTS8-1#TRPBF?
The LTC2935CTS8-1#TRPBF supports a VCC input range of 1V to 5.5V, with absolute maximum rating of 6V. Operation beyond 5.5V risks damage per Absolute Maximum Ratings. This range accommodates single-cell Li-ion (up to 4.2V), alkaline stacks, and regulated 3.3V/5V rails while maintaining 500nA quiescent current.
How does the power-fail output (PFO) behave relative to the reset output (RST) in LTC2935CTS8-1#TRPBF?
In the LTC2935CTS8-1#TRPBF, the PFO output triggers when VCC falls below a threshold 150mV higher than the selected RST threshold (e.g., 3.15V PFO / 3.00V RST). PFO remains asserted until VCC rises above its threshold plus 2.5% hysteresis, while RST releases only after VCC exceeds its threshold +5% and a 200ms timer expires.
Can LTC2935CTS8-1#TRPBF be used with a 1.8V microcontroller I/O rail?
Yes - the LTC2935CTS8-1#TRPBF's open-drain RST and PFO outputs can be pulled up to 1.8V using an external resistor, even when VCC is 3.0V or higher. This enables direct interfacing with 1.8V logic without level shifters, as long as the pull-up voltage does not exceed 5.5V and sink current stays within ±5mA limits.
What is the function of the S2, S1, and S0 pins on LTC2935CTS8-1#TRPBF?
The S2, S1, and S0 pins on LTC2935CTS8-1#TRPBF are binary-coded threshold selection inputs. Tying each to GND (low) or VCC (high) selects one of eight predefined reset thresholds (2.25V–3.30V) and corresponding power-fail thresholds. No external resistors or configuration registers are needed - selection is hardware-defined at power-up.
Does LTC2935CTS8-1#TRPBF require an external capacitor on the VCC pin?
Yes - a 0.1μF ceramic capacitor between VCC and GND is required per the datasheet. This decouples high-frequency noise from the internal comparators and ensures stable threshold detection during load transients. Values less than 0.01μF are insufficient; X7R or C0G dielectrics are recommended for temperature stability.
LTC2935CTS8-1#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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 8 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2935CTS8-1#TRPBF FAQ
1.How can I place an order for LTC2935CTS8-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2935CTS8-1#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 LTC2935CTS8-1#TRPBF reliable?
The price and inventory of LTC2935CTS8-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2935CTS8-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2935CTS8-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2935CTS8-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2935CTS8-1#TRPBF?
LTC2935CTS8-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2935CTS8-1#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 LTC2935CTS8-1#TRPBF?
For technical support, including LTC2935CTS8-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2935CTS8-1#TRPBF requirements.
6.How does Aetrix verify that LTC2935CTS8-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2935CTS8-1#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 LTC2935CTS8-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2935CTS8-1#TRPBF?
All LTC2935CTS8-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2935CTS8-1#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 LTC2935CTS8-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2935CTS8-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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