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Analog Devices Inc. LTC2934CDC-2#TRMPBF
- Part No.:
- LTC2934CDC-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2934CDC-2#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2934CDC-2#TRMPBF from Analog Devices (formerly Linear Technology) is an ultra-low power, adjustable voltage supervisor IC with active-pull-up reset and power-fail outputs, designed for battery-critical systems requiring precise 0.4V threshold monitoring, 15ms/200ms selectable reset timeout, and operation down to 1.6V supply. It delivers 500nA typical quiescent current and ±1.5% threshold accuracy over temperature.
For engineers reviewing the LTC2934CDC-2#TRMPBF datasheet, LTC2934CDC-2#TRMPBF pinout, LTC2934CDC-2#TRMPBF application, or LTC2934CDC-2#TRMPBF equivalent, key selection criteria include its active-pull-up RST/PFO outputs (eliminating external pull-ups), DFN-8 (2mm × 2mm) package, –40°C to 85°C industrial temperature grade, and independent ADJ/PFI threshold configuration via resistive dividers.
Technical Context
The LTC2934CDC-2#TRMPBF integrates two independent comparators-one for reset (ADJ input) and one for power-fail warning (PFI input)-each with 0.4V nominal threshold and programmable hysteresis (5% for ADJ, 2.5% for PFI). Its internal reset timer is controlled by the RT pin, selecting either 15ms or 200ms delay after threshold recovery.
Unlike open-drain variants, the LTC2934CDC-2#TRMPBF features active-pull-up outputs (RST and PFO) referenced to VCC, enabling direct interfacing with CMOS logic without external resistors-though a 100kΩ pull-down to GND is recommended when VCC = 0V to prevent floating states. The device operates from 1.6V to 5.5V and draws only 500nA typical ICC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 500nA typical - enables multi-year battery life in coin-cell or alkaline-powered devices. |
| Reset Threshold Accuracy | ±1.5% max over –40°C to 85°C - ensures reliable system initialization across industrial temperature range. |
| Supply Voltage Range | 1.6V to 5.5V - supports direct monitoring of Li-ion, alkaline, and coin-cell stacks without level-shifting. |
| Reset Timeout Options | 15ms or 200ms - selected via RT pin tied to GND or VCC; provides flexibility for fast recovery or robust noise immunity. |
| Power-Fail Warning Threshold | 0.4V at PFI input - enables early detection of supply collapse before critical brownout, with 2.5% hysteresis. |
| Output Type | Active-pull-up (LTC2934-2 variant) - eliminates need for external pull-up resistors and simplifies PCB layout. |
| Operating Temperature | 0°C to 70°C (C-grade) - validated for commercial and portable equipment environments. |
Pinout & Package
Package: 8-Lead (2mm × 2mm) Plastic DFN (DC package), exposed pad (optional GND connection), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Power source (1.6V–5.5V); requires 0.1μF decoupling capacitor to GND. |
| MR | Manual reset input | Pull low via pushbutton to force RST low; internally pulled up to VCC via 900kΩ. |
| RST | Active-pull-up reset output | Drives high to VCC when ADJ > 0.4V + 5% hysteresis and reset timeout expires; sinks ≤100mV @ 200μA. |
| PFO | Active-pull-up power-fail output | Drives high to VCC when PFI > 0.4V + 2.5% hysteresis; asserts low on falling threshold crossing. |
| ADJ | Reset threshold adjustment input | Connected to resistive divider; monitors falling voltage; triggers RST when < 0.4V. |
| PFI | Power-fail threshold adjustment input | Connected to resistive divider; triggers PFO when monitored voltage falls below 0.4V. |
| RT | Reset timeout selection input | Tie to GND for 15ms timeout; tie to VCC for 200ms timeout; no external resistor needed. |
| GND | Ground reference | Primary return path; exposed pad may be connected to PCB ground for thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA typical - minimizes battery drain in always-on monitoring applications like security sensors. |
| Independent dual-threshold supervision | Separate ADJ (reset) and PFI (power-fail) inputs - enables distinct early-warning and hard-reset thresholds from same supply rail. |
| Configurable reset timeout | 15ms or 200ms via single RT pin - avoids fixed-timer compromises between responsiveness and noise rejection. |
| Active-pull-up outputs | No external pull-up resistors required - reduces BOM count and board space; compatible with 1.8V/3.3V logic families. |
| High-accuracy threshold matching | ±2mV ADJ-to-PFI threshold matching - ensures consistent voltage margin between warning and reset events. |
Applications
| Portable Medical Sensors | Wireless Point-of-Sale Terminals |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring low-power supervision during sleep mode and wake-up sequencing. IC Role / Device Role / Timing Role: LTC2934CDC-2#TRMPBF monitors battery voltage via ADJ divider; asserts PFO at 2.727V (early warning) and RST at 2.553V (shutdown trigger). Use Value: 500nA ICC extends battery life beyond 3 years; active-pull-up outputs interface directly with ultra-low-power MCU GPIOs without pull-up resistors. |
Use Scenario: Battery-backed handheld POS terminal using alkaline AA cells, needing reliable power-fail signaling before EEPROM write completion. IC Role / Device Role / Timing Role: LTC2934CDC-2#TRMPBF supervises main 3.3V rail; PFO triggers NMI interrupt to initiate safe data flush; RST holds MCU in reset until stable post-recovery. Use Value: 2.5% PFI hysteresis prevents false warnings during transient load dips; 200ms RT timeout ensures full EEPROM write cycle completes before reset release. |
| Industrial Security Control Panels | Asset Tracking Beacons |
|
Use Scenario: Tamper-resistant alarm panel with backup lithium-thionyl chloride battery, requiring fail-safe reset on primary supply collapse. IC Role / Device Role / Timing Role: LTC2934CDC-2#TRMPBF monitors 5V system rail; MR pin accepts mechanical tamper switch; RST forces secure boot on intrusion event. Use Value: Manual reset input with 20μs minimum pulse width ensures robust mechanical switch debounce; ±1.5% threshold accuracy guarantees consistent trip points across temperature extremes. |
Use Scenario: GPS-enabled logistics beacon powered by Li-MnO₂ primary cell, needing early low-battery alert before transmission failure. IC Role / Device Role / Timing Role: LTC2934CDC-2#TRMPBF configures PFI for 3.192V warning and ADJ for 1.696V hard reset; both thresholds derived from single-cell voltage divider. Use Value: Independent ADJ/PFI hysteresis (5% and 2.5%) creates clean separation between warning and shutdown zones; DFN-8 footprint saves space in compact 20mm × 20mm enclosure. |
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 | 8-pin-selectable thresholds (vs. fully adjustable ADJ/PFI); same 500nA ICC and DFN-8 package. | Fixed thresholds simplify design where standard voltages (e.g., 3.3V, 2.5V) suffice; no resistor divider tuning required. | Choose LTC2935IDC-2#TRMPBF if standardized thresholds reduce BOM complexity and calibration effort. |
| LTC2909IDC-2#TRMPBF | Includes UV/OV/negative voltage monitoring; shunt-regulated VCC; higher ICC (2.5μA) and larger DFN-8 footprint. | Supports multi-rail systems (e.g., ±5V analog + 3.3V digital) and negative supply supervision not possible with LTC2934CDC-2#TRMPBF. | Choose LTC2909IDC-2#TRMPBF when monitoring multiple rails or negative supplies outweighs ultra-low ICC priority. |
Compared with LTC2935IDC-2#TRMPBF and LTC2909IDC-2#TRMPBF, the LTC2934CDC-2#TRMPBF offers superior flexibility for custom threshold design and lowest power consumption, making it optimal for single-rail, battery-constrained applications where precision adjustability is essential.
Availability
LTC2934CDC-2#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, wireless point-of-sale terminals, and industrial security control panels requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTC2934CDC-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 legacy precision analog portfolio, including high-reliability supervisors, references, and signal conditioning ICs for demanding industrial and medical applications.
The LTC2934 family was designed specifically for ultra-low-power, battery-operated systems requiring configurable voltage supervision with minimal quiescent current and high threshold accuracy across temperature.
FAQ
What is the operating temperature range for the LTC2934CDC-2#TRMPBF?
The LTC2934CDC-2#TRMPBF is specified for 0°C to 70°C ambient operation (C-grade), validated per manufacturer's characterization and production testing. This range covers commercial and portable equipment use cases but excludes extended industrial or automotive environments requiring –40°C to 85°C (I-grade) operation.
How does the RT pin select reset timeout on the LTC2934CDC-2#TRMPBF?
The RT pin on the LTC2934CDC-2#TRMPBF selects reset timeout by logic level: tying RT to GND configures a 15ms delay, while tying RT to VCC selects 200ms. No external components are needed-the internal timer circuitry detects the state directly, and the timeout begins after ADJ rises above 0.4V + 5% hysteresis.
Can the LTC2934CDC-2#TRMPBF monitor two different supply voltages simultaneously?
Yes-the LTC2934CDC-2#TRMPBF supports dual-voltage monitoring using separate resistive dividers on ADJ and PFI inputs. Figure 2 in the datasheet shows a configuration where V1 and V2 drive independent dividers, allowing distinct reset and power-fail thresholds for different rails, such as 3.3V I/O and 1.8V core supplies.
What is the maximum supply voltage the LTC2934CDC-2#TRMPBF can tolerate?
The LTC2934CDC-2#TRMPBF has an absolute maximum VCC rating of 6V, but its functional operating range is 1.6V to 5.5V. Operation above 5.5V risks permanent damage, and performance is not guaranteed outside the 1.6V–5.5V range-even if VCC remains below 6V.
Does the LTC2934CDC-2#TRMPBF require external pull-up resistors on RST and PFO?
No-the LTC2934CDC-2#TRMPBF uses active-pull-up outputs referenced to VCC, eliminating the need for external pull-up resistors. However, a 100kΩ pull-down resistor from RST or PFO to GND is recommended when VCC may fall to 0V to prevent floating outputs that could cause unintended logic states in connected CMOS inputs.
LTC2934CDC-2#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:
- 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:
- 8-DFN (2x2)
LTC2934CDC-2#TRMPBF FAQ
1.How can I place an order for LTC2934CDC-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2934CDC-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 LTC2934CDC-2#TRMPBF reliable?
The price and inventory of LTC2934CDC-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 LTC2934CDC-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2934CDC-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2934CDC-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2934CDC-2#TRMPBF?
LTC2934CDC-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2934CDC-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 LTC2934CDC-2#TRMPBF?
For technical support, including LTC2934CDC-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2934CDC-2#TRMPBF requirements.
6.How does Aetrix verify that LTC2934CDC-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2934CDC-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 LTC2934CDC-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2934CDC-2#TRMPBF?
All LTC2934CDC-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2934CDC-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 LTC2934CDC-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2934CDC-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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