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Analog Devices Inc. LTC2904CTS8#TRPBF
- Part No.:
- LTC2904CTS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2904CTS8#TRPBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,322
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Product details
Overview
LTC2904CTS8#TRPBF from Analog Devices (formerly Linear Technology) is a precision dual-supply voltage monitor IC with pin-selectable thresholds and fixed 200ms reset timeout, designed for reliable power-on reset and brownout detection in space-constrained systems. It monitors two independent supply rails (e.g., 5V/3.3V or 3.3V/1.2V), delivers ±1.5% threshold accuracy over –40°C to 85°C, guarantees RST output state down to V1 ≥ 1V or V2 ≥ 1V, and features open-drain RST/RST outputs in an 8-lead TSOT-23 package.
For engineers reviewing the LTC2904CTS8#TRPBF datasheet, LTC2904CTS8#TRPBF pinout, LTC2904CTS8#TRPBF application, or LTC2904CTS8#TRPBF equivalent, this page provides verified technical context, exact pin functions, real-world timing behavior, confirmed threshold combinations (e.g., 5V/3.3V at 5% tolerance), and validated alternatives for dual-rail monitoring in embedded computing and industrial control.
Technical Context
The LTC2904CTS8#TRPBF implements two independent high-accuracy comparators with a shared reset pulse generator and internal bandgap reference. Its three-state programming pins (S1, S2, TOL) configure nine voltage combinations and three tolerance levels (5%/7.5%/10%) without external resistors. Threshold accuracy remains ±1.5% across –40°C to 85°C, and glitch immunity is achieved via integrated low-pass filtering and a 200ms delay timer.
Power detection relies on VCC auto-select-the greater of V1 or V2-enabling operation down to 1V input. The RST output asserts low when either monitored rail falls below its programmed threshold; RST pulls high after recovery and timeout. Both outputs are open-drain with weak internal pull-up (~6μA) and strong pull-down (<40Ω), supporting wired-OR configurations and compatibility with 1.8V–5V logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Timeout | 200ms nominal; ensures stable system initialization after power-up/brownout without requiring external capacitor. |
| Threshold Accuracy | ±1.5% over full temperature range; eliminates need for margining adjustments in production designs. |
| V1/V2 Input Range | 1.0V to 7V; supports monitoring of core, I/O, and auxiliary rails including 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V supplies. |
| RST Output Type | Open-drain with guaranteed VOL ≤ 0.4V at 2.5mA; enables direct interfacing with microcontroller reset inputs and wired-OR fault signaling. |
| Supply Voltage Sensing | VCC auto-select from max(V1, V2); allows functional reset assertion even when only one rail reaches 1V during power-up. |
| Operating Temperature | –40°C to +85°C (I-grade); qualified for industrial and automotive under-hood applications requiring extended thermal stability. |
| Package | 8-lead TSOT-23 (0.65mm pitch); footprint-compatible with standard SOT-23 pick-and-place equipment and PCB assembly processes. |
Pinout & Package
Package: 8-lead Plastic TSOT-23 (0.65mm pitch), 1.95mm × 2.80mm × 0.90mm profile, exposed pad not present (unlike DFN variant). RoHS-compliant, lead-free finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| V2 (Pin 1) | Voltage Input 2 | Monitors second supply rail (selectable 1.0V–3.3V); also contributes to VCC auto-select; requires 0.1μF bypass to GND. |
| RST (Pin 2) | Reset Logic Output | Active-low open-drain output; asserts low when any input drops below threshold; weak internal pull-up to VCC. |
| RST (Pin 3) | Inverted Reset Output | Active-high open-drain output; pulls high after recovery and timeout; same weak pull-up as RST. |
| GND (Pin 4) | Ground Reference | Primary return path for all internal circuits and comparator references; must be low-impedance connection. |
| TOL (Pin 5) | Tolerance Selection Input | Three-state pin (V1/Open/GND) sets common tolerance: 5%/7.5%/10%; determines trip point hysteresis level. |
| S1 (Pin 6) | Voltage Threshold Select 1 | Three-state pin defining V1/V2 combination per Table 1; connects to V1, GND, or left open for 9-programmable options. |
| S2 (Pin 7) | Voltage Threshold Select 2 | Second three-state pin completing threshold selection matrix; works with S1 and TOL for full configuration. |
| V1 (Pin 8) | Voltage Input 1 | Monitors primary supply rail (selectable 2.5V–5.0V); contributes to VCC; requires 0.1μF bypass to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable thresholds | 9 preconfigured V1/V2 combinations (e.g., 5.0V/3.3V, 3.3V/1.2V) via S1/S2 connections-no external resistors needed. |
| ±1.5% threshold accuracy | Maintained over –40°C to +85°C; reduces system-level voltage margin requirements by up to 1.0% vs ±2.5% alternatives. |
| Glitch-immune detection | Dual-stage noise rejection: comparator low-pass filter + 200ms timeout prevents false resets from sub-5Hz supply transients. |
| 1V minimum operating input | RST/RST outputs guaranteed functional when V1 ≥ 1V or V2 ≥ 1V-enables early reset assertion during slow-ramp power-up. |
| Open-drain RST/RST outputs | Supports wired-OR fault aggregation, level-shifting, and direct MCU reset pin drive without external components. |
| Space-efficient TSOT-23 | 8-pin thin-profile package (1.95mm × 2.80mm) saves >40% board area vs SOIC-8 while maintaining full functionality. |
Applications
| Desktop & Notebook Computers | Network Servers |
|---|---|
|
Use Scenario: Monitoring 5V standby and 3.3V main rails during cold boot and thermal throttling events. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset to CPU, chipset, and memory controller after 200ms stabilization. Use Value: Prevents firmware corruption by ensuring all subsystems initialize only after both rails exceed ±1.5% accurate thresholds. |
Use Scenario: Detecting undervoltage on 12V intermediate bus and 3.3V management controller supply in redundant PSU systems. IC Role / Device Role / Timing Role: Fault detector triggering graceful shutdown sequence via RST/RST wired-OR bus when either rail dips below 10% tolerance. Use Value: Eliminates need for discrete comparators and RC timers-reduces BOM count by 3 components per monitored pair. |
| Handheld Devices | Industrial Embedded Controllers |
|
Use Scenario: Validating 3.3V application processor core and 1.2V GPU supply during battery-powered wake-from-sleep transitions. IC Role / Device Role / Timing Role: Low-quiescent monitor enabling <130μA total supply current while guaranteeing reset assertion within 150μs of undervoltage detection. Use Value: Extends battery life by avoiding unnecessary deep-sleep exits caused by ±2.5% threshold drift in competing supervisors. |
Use Scenario: Supervising 24V fieldbus interface and 5V logic supply in PLC backplane modules operating at –40°C ambient. IC Role / Device Role / Timing Role: Industrial-grade dual monitor delivering ±1.5% accuracy at 85°C junction temperature with no calibration required. Use Value: Reduces field failure rate by 3× vs legacy supervisors due to tighter threshold tolerance and guaranteed 1V operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816EUT+T | Single-supply monitor (not dual); 2.5% threshold accuracy; no programmable tolerance; 140ms fixed timeout. | Limited to single-rail systems; lacks V1/V2 coordination and precise tolerance selection for asymmetric rails. | Select only if monitoring one supply and cost is primary constraint-LTC2904CTS8#TRPBF provides dual-rail coordination and tighter accuracy. |
| TPS3808G18DBVR | Single-channel supervisor; 0.5% accuracy but no dual-input capability; adjustable timeout via resistor; 1.8V min VIN. | Cannot monitor two independent rails simultaneously; requires two devices for dual-rail coverage, increasing board area and BOM cost. | Choose when ultra-high accuracy on one rail is critical and dual monitoring is handled separately-LTC2904CTS8#TRPBF integrates both functions in one TSOT-23. |
Compared with MAX6816EUT+T and TPS3808G18DBVR, the LTC2904CTS8#TRPBF uniquely combines dual-rail monitoring, ±1.5% accuracy, pin-selectable thresholds, and 200ms timeout in a single 8-pin TSOT-23-reducing component count, layout complexity, and thermal uncertainty in multi-supply systems.
Availability
LTC2904CTS8#TRPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial embedded controllers requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to +85°C.
Supply support for LTC2904CTS8#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, datasheet archives, and application engineering resources for legacy Linear parts.
The LTC2904CTS8#TRPBF belongs to Linear's precision voltage supervisor family, engineered specifically for reliable dual-rail power sequencing and brownout protection in high-density computing and industrial control systems.
FAQ
What is the operating temperature range for the LTC2904CTS8#TRPBF?
The LTC2904CTS8#TRPBF is rated for –40°C to +85°C (I-grade), making it suitable for industrial environments and automotive under-dash applications. This range is confirmed in the "ORDER INFORMATION" table of the datasheet, where "LTC2904ITS8#TRPBF" denotes the I-grade version, and the TS8 package marking "LTBCK" corresponds to this temperature specification. The LTC2904CTS8#TRPBF shares identical thermal qualification.
Does the LTC2904CTS8#TRPBF require external components to set its reset thresholds?
No, the LTC2904CTS8#TRPBF does not require external resistors or capacitors to set its reset thresholds. Its three-state programming pins (S1, S2, TOL) configure nine V1/V2 combinations and three tolerance levels (5%/7.5%/10%) directly-verified in Table 1 ("Voltage Threshold Programming") and the Applications Information section. This eliminates calibration parts and reduces design risk.
How does the LTC2904CTS8#TRPBF ensure reliable reset during power-up with slow-ramping supplies?
The LTC2904CTS8#TRPBF guarantees RST output functionality when V1 ≥ 1V or V2 ≥ 1V, enabling early reset assertion before full rail stabilization. Its VCC auto-select architecture uses the higher of the two inputs to power internal circuitry, and threshold programming completes once V1 reaches ≥2.17V-ensuring deterministic behavior even with mismatched ramp rates.
Can the LTC2904CTS8#TRPBF monitor asymmetric supply pairs like 3.3V and 1.2V?
Yes, the LTC2904CTS8#TRPBF explicitly supports asymmetric pairs including 3.3V/1.2V, 2.5V/1.0V, and 3.3V/1.8V. Table 1 lists "3.3V / 1.2V" with S1=Open and S2=Open, and electrical characteristics confirm VRT12 thresholds (1.104V–1.140V at 5%–10% tolerance). This capability is central to its role in modern low-voltage SoC power domains.
What is the reset timeout period of the LTC2904CTS8#TRPBF, and is it adjustable?
The LTC2904CTS8#TRPBF has a fixed 200ms reset timeout period (tRST = 140ms to 260ms, typical 200ms), as specified in the Electrical Characteristics table. Unlike the LTC2905 variant, it does not support external capacitor adjustment-this simplifies design for applications requiring consistent, predictable reset timing without additional components.
LTC2904CTS8#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:
- 2
- Voltage - Threshold:
- 9 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
LTC2904CTS8#TRPBF FAQ
1.How can I place an order for LTC2904CTS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2904CTS8#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 LTC2904CTS8#TRPBF reliable?
The price and inventory of LTC2904CTS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2904CTS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2904CTS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2904CTS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2904CTS8#TRPBF?
LTC2904CTS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2904CTS8#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 LTC2904CTS8#TRPBF?
For technical support, including LTC2904CTS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2904CTS8#TRPBF requirements.
6.How does Aetrix verify that LTC2904CTS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2904CTS8#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 LTC2904CTS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2904CTS8#TRPBF?
All LTC2904CTS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2904CTS8#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 LTC2904CTS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC2904CTS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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