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Analog Devices Inc. LTC2935ITS8-2#TRMPBF
- Part No.:
- LTC2935ITS8-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2935ITS8-2#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,121
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Product details
Overview
LTC2935ITS8-2#TRMPBF from Analog Devices (formerly Linear Technology) is an ultra-low power voltage supervisor IC with pin-selectable reset and power-fail thresholds, active-pull-up RST/PFO outputs, and manual reset input - designed for battery-powered systems requiring precise early-warning voltage monitoring and clean system initialization. Key confirmed parameters: 500nA typical quiescent current, ±1.5% max threshold accuracy over temperature, eight selectable reset thresholds (2.25V–3.30V), 200ms reset timeout, and –40°C to +85°C operating range.
For engineers reviewing the LTC2935ITS8-2#TRMPBF datasheet, LTC2935ITS8-2#TRMPBF pinout, LTC2935ITS8-2#TRMPBF application, or LTC2935ITS8-2#TRMPBF equivalent, this page delivers verified technical context, exact TSOT-23 pin mapping, real-world use scenarios in coin-cell and Li-ion systems, and two validated alternative parts with documented functional and interface differences.
Technical Context
The LTC2935ITS8-2#TRMPBF integrates dual comparators with precision internal attenuators and hysteresis control: one for reset generation (5% rising hysteresis), another for early power-fail warning (2.5% rising hysteresis). Its S2/S1/S0 inputs configure eight discrete falling reset thresholds between 2.25V and 3.30V, with corresponding PFO thresholds fixed at +150mV above each selected VRTF.
This variant (LTC2935-2) features actively pulled-up RST and PFO outputs referenced to VCC - eliminating external pull-up resistors while restricting output voltage to ≤VCC. It operates across –40°C to +85°C with guaranteed 500nA ICC (typ) and ±1.5% threshold accuracy over full temperature range.
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 Accuracy | ±1.5% max over –40°C to +85°C - ensures reliable reset assertion across industrial temperature extremes. |
| Reset Timeout Period | 200ms nominal - provides sufficient system stabilization time before releasing processor reset. |
| Power-Fail Threshold Offset | +150mV above configured reset threshold - guarantees deterministic early warning margin before reset. |
| Output Type | Active pull-up (LTC2935-2) - drives RST/PFO high to VCC without external resistors; not overvoltage tolerant. |
| Supply Voltage Range | 1V to 5.5V - supports direct monitoring of single-cell Li-ion (3.0–4.2V), alkaline stacks, and coin cells (1.5–3.0V). |
| Hysteresis (RST) | 5% of selected threshold - prevents chatter during slow-rising VCC or noisy supply conditions. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (2.9mm × 1.6mm × 0.8mm), lead-free, RoHS-compliant. Exposed pad optional for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply and monitored voltage input | Primary voltage rail under supervision; requires 0.1μF bypass capacitor to GND for noise immunity. |
| MR | Manual reset input | Pull low to force RST low for 200ms after release; internally pulled up to VCC via 900kΩ resistor. |
| RST | Active-pull-up reset output | Drives high to VCC when valid; pulls low when VCC falls below selected threshold; no external pull-up needed. |
| PFO | Active-pull-up power-fail output | Asserts low when VCC drops below PFO threshold (VRTF + 150mV); released after VCC rises 2.5% above PFO threshold. |
| S2, S1, S0 | Binary threshold selection inputs | Set to GND/VCC to select one of eight reset/power-fail threshold pairs; no external logic required. |
| GND | Device ground reference | Return path for all internal circuits; must be connected to system ground plane with low impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA typical enables >10-year battery life in coin-cell applications like smart meters and wearables. |
| Eight pin-selectable thresholds | Eliminates external resistor networks; supports 2.25V–3.30V reset range in 150mV steps for flexible system design. |
| Early power-fail warning | Dedicated PFO output with fixed +150mV offset provides deterministic shutdown headroom before reset assertion. |
| Integrated 5% hysteresis | Prevents false resets during marginal VCC recovery or load-induced dips without external components. |
| TSOT-23 footprint compatibility | 2.9mm × 1.6mm package fits space-constrained portable designs; pinout matches industry-standard 8-lead TSOT-23 layout. |
Applications
| Alkaline Cell Stack Monitoring | Coin Cell-Powered IoT Sensor |
|---|---|
Use Scenario: Monitoring 3×AA alkaline stack (4.5V nominal) powering a BLE sensor node with sleep current <1μA. IC Role / Device Role: Supervisor asserts PFO at 3.15V to trigger data save before brownout; RST holds MCU in reset below 3.00V. Use Value: Prevents EEPROM corruption by enabling controlled shutdown with 150mV voltage margin between PFO and RST thresholds. |
Use Scenario: CR2032-powered asset tracker operating intermittently for 5+ years on single cell. IC Role / Device Role: LTC2935ITS8-2#TRMPBF monitors declining cell voltage; PFO triggers last-gasp GPS upload at 2.70V, RST halts operation at 2.55V. Use Value: 500nA ICC extends usable battery life by >12 months versus higher-current supervisors; TSOT-23 footprint saves PCB area. |
| Li-ion Battery Backup System | Industrial Handheld Terminal |
Use Scenario: 3.7V Li-ion backup for main 5V rail in point-of-sale terminal; supervisor guards against deep discharge. IC Role / Device Role: Configured for 2.85V reset/3.00V PFO; PFO signals microcontroller to disable non-critical peripherals before critical brownout. Use Value: Active-pull-up outputs eliminate pull-up resistors, reducing BOM count and leakage paths in high-reliability backup circuits. |
Use Scenario: Rugged handheld with wide ambient temperature range (–20°C to +70°C) and cold-start requirement. IC Role / Device Role: LTC2935ITS8-2#TRMPBF ensures reliable boot at low temperatures using –40°C to +85°C rated performance and 5% hysteresis. Use Value: ±1.5% threshold accuracy over full industrial range prevents premature resets during cold startup or hot operation. |
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#TRMPBF | Same functionality and pinout, but rated for 0°C to 70°C ambient instead of –40°C to +85°C. | Not suitable for automotive or outdoor industrial deployments requiring extended temperature operation. | Select only for commercial-grade applications where ambient stays within 0°C–70°C. |
| LTC2934ITS8#TRMPBF | Adjustable thresholds via external resistors (not pin-selectable); 500nA ICC; same TSOT-23 package and –40°C to +85°C rating. | Requires two external resistors per threshold; less deterministic than factory-trimmed LTC2935ITS8-2#TRMPBF thresholds. | Choose when fine-grained threshold tuning (e.g., 2.92V) is required beyond the LTC2935's 150mV step grid. |
Compared with LTC2935CTS8-2#TRMPBF, the LTC2935ITS8-2#TRMPBF adds guaranteed operation down to –40°C - critical for outdoor or automotive auxiliary systems. Versus LTC2934ITS8#TRMPBF, it trades resistor-based adjustability for superior threshold accuracy (±1.5% vs ±2%) and zero external component count.
Availability
LTC2935ITS8-2#TRMPBF is available at Aetrix Electronics and suitable for battery-powered equipment, portable medical devices, and security systems requiring stable component supply with long-term lifecycle support and consistent parametric performance.
Supply support for LTC2935ITS8-2#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 its precision analog product lines, including supervisory ICs, with focus on high-reliability, low-power, and industrial-grade performance.
The LTC2935 family was designed specifically for ultra-low-power voltage supervision in space- and energy-constrained portable electronics, emphasizing sub-1μA operation, pin-configurable thresholds, and robust noise immunity.
FAQ
What is the operating temperature range of the LTC2935ITS8-2#TRMPBF?
The LTC2935ITS8-2#TRMPBF is specified for operation from –40°C to +85°C ambient temperature, making it suitable for industrial, automotive auxiliary, and outdoor portable applications where extended thermal performance is required. This rating is confirmed in the Absolute Maximum Ratings table and Order Information section of the official datasheet.
How does the LTC2935ITS8-2#TRMPBF differ from the LTC2935-1 variants?
The LTC2935ITS8-2#TRMPBF belongs to the LTC2935-2 variant family, featuring actively pulled-up RST and PFO outputs referenced to VCC - unlike LTC2935-1's open-drain outputs requiring external pull-ups. This eliminates external resistors but restricts output voltage to ≤VCC. Both share identical threshold selection, accuracy, and timing specs.
What is the reset timeout period for the LTC2935ITS8-2#TRMPBF?
The LTC2935ITS8-2#TRMPBF has a nominal reset timeout period of 200ms, with a production-tested range of 140ms to 260ms across temperature and voltage. This delay ensures stable power-up before releasing the RST signal, preventing premature processor initialization during supply ramp-up.
Can the LTC2935ITS8-2#TRMPBF monitor voltages below 2.25V?
No - the LTC2935ITS8-2#TRMPBF's lowest selectable reset threshold is 2.25V (S2=S1=S0=High), with corresponding PFO at 2.40V. For sub-2.25V monitoring, consider the LTC2935-3/-4 variants (1.60V–2.44V range) or the adjustable LTC2934ITS8#TRMPBF, which supports thresholds down to 0.8V via external resistors.
Is the TSOT-23 package of the LTC2935ITS8-2#TRMPBF compatible with standard 8-lead TSOT-23 footprints?
Yes - the LTC2935ITS8-2#TRMPBF uses the standard 8-lead plastic TSOT-23 package (LTC DWG #05-08-1637), with 0.65mm pitch, 2.9mm × 1.6mm body, and JEDEC MO-193 compliance. Pin 1 marking and top-side silkscreen match industry conventions, enabling drop-in placement on existing TSOT-23 layouts.
LTC2935ITS8-2#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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 8 Selectable Threshold Combinations
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2935ITS8-2#TRMPBF FAQ
1.How can I place an order for LTC2935ITS8-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2935ITS8-2#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 LTC2935ITS8-2#TRMPBF reliable?
The price and inventory of LTC2935ITS8-2#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2935ITS8-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2935ITS8-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2935ITS8-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2935ITS8-2#TRMPBF?
LTC2935ITS8-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2935ITS8-2#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 LTC2935ITS8-2#TRMPBF?
For technical support, including LTC2935ITS8-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2935ITS8-2#TRMPBF requirements.
6.How does Aetrix verify that LTC2935ITS8-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2935ITS8-2#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 LTC2935ITS8-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2935ITS8-2#TRMPBF?
All LTC2935ITS8-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2935ITS8-2#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 LTC2935ITS8-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2935ITS8-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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