My Inquiry
My Account
Analog Devices Inc. LTC2935IDC-4#TRMPBF
- Part No.:
- LTC2935IDC-4#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2935IDC-4#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:512
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2935IDC-4#TRMPBF from Analog Devices (acquired Linear Technology) is an ultra-low power voltage supervisor IC with active-pull-up reset and power-fail outputs, eight pin-selectable reset thresholds (1.60V–2.40V), ±1.5% threshold accuracy over temperature, and 500nA typical quiescent current - designed for battery-powered systems requiring reliable early-warning shutdown and controlled reset sequencing.
For engineers reviewing the LTC2935IDC-4#TRMPBF datasheet, LTC2935IDC-4#TRMPBF pinout, LTC2935IDC-4#TRMPBF application, or LTC2935IDC-4#TRMPBF equivalent, key selection criteria include its –40°C to 85°C industrial temperature rating, 2mm × 2mm DFN package, active-pull-up RST/PFO outputs, 200ms reset timeout, and precise 120mV power-fail margin above configured reset thresholds.
Technical Context
The LTC2935IDC-4#TRMPBF integrates dual comparators with precision internal attenuators and hysteresis control: one monitors VCC against a user-selected falling reset threshold (VRTF), while the second triggers PFO at a fixed 120mV higher level (VPFT = VRTF + 120mV). Its internal 200ms reset timer activates only after VCC exceeds the selected threshold by 5%, ensuring stable release after brownout recovery.
Threshold selection uses three binary inputs (S2/S1/S0) tied to GND or VCC to configure eight discrete falling thresholds; MR provides manual reset with 20μs minimum pulse width and internal 900kΩ pull-up. Outputs RST and PFO are actively pulled up to VCC, eliminating external resistors and supporting logic-level compatibility down to VCC = 1V.
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 | 1.60V to 2.40V (8 pin-selectable values) - matches common low-voltage rails (1.8V, 2.5V, 3.3V logic domains). |
| Power-Fail Margin | +120mV above reset threshold - provides deterministic early warning before system reset occurs. |
| Threshold Accuracy | ±1.5% max over –40°C to 85°C - ensures reliable trip points across industrial environments. |
| Reset Timeout | 200ms nominal - guarantees sufficient processor initialization time after supply stabilization. |
| Hysteresis | 5% rising (RST), 2.5% rising (PFO) - prevents output chatter during slow-rising or noisy supply conditions. |
| Output Type | Active pull-up (LTC2935-4 variant) - drives RST/PFO high to VCC without external components. |
Pinout & Package
Package: 8-Lead (2mm × 2mm) Plastic DFN with exposed pad (pin 9, optional GND connection). Compact footprint supports space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply and monitored voltage input | Primary rail under supervision; requires 0.1μF decoupling to GND; supports 1V–5.5V operation. |
| MR | Manual reset input | Active-low pushbutton interface; internally pulled up to VCC (900kΩ); 20μs minimum pulse width. |
| RST | Reset output | Active-pull-up to VCC; asserts low when VCC falls below selected threshold; releases high after 200ms delay + 5% hysteresis. |
| PFO | Power-fail output | Active-pull-up to VCC; asserts low 120mV above reset threshold; releases high after 2.5% hysteresis. |
| S2, S1, S0 | Threshold selection inputs | Binary-coded configuration pins (GND/VCC) selecting one of eight reset/power-fail threshold pairs. |
| GND | Ground reference | System ground return; exposed pad may be connected to GND for thermal/EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 500nA typical ICC enables >10-year battery life in coin-cell applications like security sensors. |
| Configurable dual-threshold monitoring | Independent reset and power-fail thresholds eliminate need for external resistor dividers or secondary supervisors. |
| Industrial temperature range | –40°C to 85°C operation validated across full specification range - suitable for outdoor and automotive-adjacent deployments. |
| No external pull-up components required | Integrated active pull-up on RST and PFO reduces BOM count and PCB area vs open-drain alternatives. |
| Robust noise immunity | Comparator glitch immunity >2ms for transients <100mV - suppresses false triggers from switching noise or load dumps. |
Applications
| Portable Medical Sensors | Wireless IoT Endpoints |
|---|---|
Use Scenario: Coin-cell-powered wearable ECG sensor operating continuously for 3+ years. IC Role / Device Role / Timing Role: Monitors CR2032 voltage (nominal 3.0V), asserts PFO at 2.70V to trigger data save before RST at 2.55V initiates shutdown. Use Value: Prevents data loss during battery depletion by enabling 150mV of usable headroom between warning and reset. |
Use Scenario: LoRaWAN node in remote agriculture sensor network with intermittent solar charging. IC Role / Device Role / Timing Role: Supervises 1.8V LDO output feeding MCU and RF transceiver; configures 1.72V reset to avoid premature brownout lockup. Use Value: 500nA quiescent current minimizes self-discharge, extending operational uptime between charge cycles. |
| Point-of-Sale Terminals | Industrial Security Panels |
Use Scenario: Battery-backed POS terminal maintaining transaction logs during AC power failure. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse; PFO triggers NMI interrupt to flush RAM cache before RST halts processor. Use Value: 200ms reset timeout ensures complete memory write completion prior to power loss. |
Use Scenario: Intrusion alarm panel with alkaline battery backup sustaining 24/7 monitoring. IC Role / Device Role / Timing Role: Monitors 9V alkaline stack via resistive divider; selects 2.40V reset threshold to accommodate voltage sag under load. Use Value: ±1.5% threshold accuracy prevents nuisance alarms caused by temperature-induced voltage drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2935IDC-2#TRMPBF | Same package, temperature grade, and pinout; differs only in reset threshold table (3.30V–2.25V range vs 2.40V–1.60V). | Used where higher-voltage rails (e.g., 3.3V logic) require supervision instead of sub-2.5V domains. | Select LTC2935IDC-2#TRMPBF if monitoring 3.3V supplies; LTC2935IDC-4#TRMPBF is optimal for 1.8V/2.5V systems. |
| LTC2934IDC-4#TRMPBF | Adjustable thresholds via external resistors (not pin-selectable); same 500nA IQ, 200ms timeout, and active-pull-up outputs. | Offers fine-grained threshold tuning but requires two external resistors and layout area. | Choose LTC2934IDC-4#TRMPBF when exact non-standard thresholds (e.g., 2.17V) are required; LTC2935IDC-4#TRMPBF simplifies design with factory-trimmed precision. |
Compared with LTC2935IDC-2#TRMPBF, the LTC2935IDC-4#TRMPBF provides lower reset thresholds optimized for modern low-voltage microcontrollers, while LTC2934IDC-4#TRMPBF trades pin-select simplicity for analog adjustability - making LTC2935IDC-4#TRMPBF the preferred choice for cost-sensitive, space-constrained 1.8V/2.5V battery systems.
Availability
LTC2935IDC-4#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, wireless IoT endpoints, point-of-sale terminals, and industrial security panels requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC2935IDC-4#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 high-reliability analog IC portfolio, emphasizing precision, low power, and robustness for mission-critical applications.
The LTC2935 family was designed specifically for ultra-low-power battery supervision in portable and energy-harvesting systems, combining pin-selectable thresholds, dual-output warning/reset capability, and industry-leading 500nA quiescent current.
FAQ
What is the operating voltage range of the LTC2935IDC-4#TRMPBF?
The LTC2935IDC-4#TRMPBF operates from 1V to 5.5V on its VCC pin, covering standard logic rails (1.8V, 2.5V, 3.3V) and battery chemistries including Li-ion, alkaline, and coin cells. Its internal circuitry functions correctly even as VCC drops to 1V, ensuring valid RST and PFO outputs throughout discharge.
How does the power-fail threshold relate to the reset threshold in the LTC2935IDC-4#TRMPBF?
In the LTC2935IDC-4#TRMPBF, the power-fail threshold (VPFT) is fixed at exactly 120mV above the selected reset threshold (VRTF) - for example, selecting 2.40V reset yields a 2.52V power-fail alert. This deterministic margin enables predictable early-warning timing without external components or calibration.
Can the LTC2935IDC-4#TRMPBF be used with a 1.8V supply rail?
Yes - the LTC2935IDC-4#TRMPBF's lowest reset threshold is 1.60V, making it fully compatible with 1.8V systems. When configured for 1.72V reset (S2=High, S1=High, S0=High), it provides 120mV headroom (1.84V PFO) to initiate controlled shutdown before brownout, ideal for 1.8V microcontrollers.
What is the function of the exposed pad on the LTC2935IDC-4#TRMPBF DFN package?
The exposed pad (pin 9) on the LTC2935IDC-4#TRMPBF's 2mm × 2mm DFN package is electrically connected to GND and serves dual purposes: improving thermal dissipation during transient loading and reducing ground impedance for noise-sensitive comparator operation. It may be left floating or soldered to PCB GND per layout requirements.
Does the LTC2935IDC-4#TRMPBF require external pull-up resistors on RST and PFO?
No - the LTC2935IDC-4#TRMPBF features active-pull-up outputs on both RST and PFO, driving them high to VCC without external components. This eliminates BOM cost and board space associated with pull-up resistors while ensuring logic compatibility across the full 1V–5.5V VCC range.
LTC2935IDC-4#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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:
- 8-DFN (2x2)
LTC2935IDC-4#TRMPBF FAQ
1.How can I place an order for LTC2935IDC-4#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2935IDC-4#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 LTC2935IDC-4#TRMPBF reliable?
The price and inventory of LTC2935IDC-4#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2935IDC-4#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2935IDC-4#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2935IDC-4#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2935IDC-4#TRMPBF?
LTC2935IDC-4#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2935IDC-4#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 LTC2935IDC-4#TRMPBF?
For technical support, including LTC2935IDC-4#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2935IDC-4#TRMPBF requirements.
6.How does Aetrix verify that LTC2935IDC-4#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2935IDC-4#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 LTC2935IDC-4#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2935IDC-4#TRMPBF?
All LTC2935IDC-4#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2935IDC-4#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 LTC2935IDC-4#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2935IDC-4#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2935IDC-4#TRMPBF 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…
