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Analog Devices Inc. LTC2904CTS8#TRMPBF
- Part No.:
- LTC2904CTS8#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2904CTS8#TRMPBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,204
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Product details
Overview
LTC2904CTS8#TRMPBF from Analog Devices (formerly Linear Technology) is a precision dual supply monitor IC with pin-selectable thresholds, designed for simultaneous monitoring of two independent voltage rails in space-constrained systems. It features ±1.5% threshold accuracy over temperature, 200ms fixed reset delay, open-drain RST output, and guaranteed operation down to 1V input. It is commonly used in desktop computers, network servers, and handheld devices requiring reliable power-on reset and brownout detection.
For engineers reviewing the LTC2904CTS8#TRMPBF datasheet, LTC2904CTS8#TRMPBF pinout, LTC2904CTS8#TRMPBF application, or LTC2904CTS8#TRMPBF equivalent, key selection criteria include its fixed 200ms reset timeout, TSOT-23-8 package footprint, programmable dual-voltage thresholds (e.g., 5V/3.3V, 3.3V/2.5V), ±1.5% accuracy over 0°C to 70°C, and guaranteed RST assertion at V1 ≥ 1V or V2 ≥ 1V.
Technical Context
The LTC2904CTS8#TRMPBF implements a dual-input comparator architecture with internal bandgap reference and three-state programming pins (S1, S2, TOL) that configure nine voltage combinations and three tolerance levels (5%, 7.5%, 10%). Its reset pulse generator enforces a fixed 200ms delay after both inputs exceed thresholds, with glitch immunity achieved via integrated low-pass filtering and timing-based noise rejection.
It uses the greater of V1 or V2 as its internal supply (VCC), enabling operation without external bias. The open-drain RST output is actively pulled low during fault conditions and weakly pulled high (via ~6μA internal current source) when valid, supporting wired-OR configurations and compatibility with diverse logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Timeout Period | 200ms nominal; ensures stable system initialization before release of processor reset. |
| Threshold Accuracy | ±1.5% over full operating temperature range; enables tight margining without derating for drift. |
| Supply Input Range | V1/V2: –0.3V to 7V; supports monitoring of 1.0V–5.0V rails with headroom for transients. |
| RST Output Type | Open-drain with guaranteed VOL ≤ 0.4V at 2.5mA; allows level-shifting and wired-OR reset bus sharing. |
| Minimum Valid VCC | 1V; ensures correct RST logic state even during deep brownout on either monitored rail. |
| Operating Temperature | 0°C to 70°C; qualified for commercial-grade embedded computing and peripheral applications. |
| Input Current (V2) | 0.4–1.0μA typical; minimizes loading on low-power or high-impedance voltage sources. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (ThinSOT™), 1.95mm × 2.80mm × 0.90mm profile, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V2 (Pin 1) | Voltage Input 2 | Monitors second rail (selectable 3.3V/2.5V/1.8V/1.5V/1.2V/1.0V); also contributes to internal VCC. |
| RST (Pin 2) | Reset Logic Output | Active-low open-drain output; asserts low when either V1 or V2 falls below programmed threshold. |
| RST (Pin 3) | Inverted Reset Output | Complementary to Pin 2; pulls low only when both V1 and V2 are above threshold and delay expires. |
| GND (Pin 4) | Ground Reference | Primary return path; exposed pad (not present in TSOT-23) is absent-no thermal pad connection required. |
| TOL (Pin 5) | Tolerance Select Input | Three-state pin (V1/Open/GND) sets common tolerance: 5%/7.5%/10% for both V1 and V2. |
| S1 (Pin 6) | Voltage Threshold Select | Three-state pin defining V1/V2 combination per Table 1; determines nominal trip points (e.g., 5V/3.3V). |
| S2 (Pin 7) | Voltage Threshold Select | Second three-state pin completing V1/V2 pair selection; works jointly with S1 and TOL. |
| V1 (Pin 8) | Voltage Input 1 | Monitors primary rail (selectable 5V/3.3V/2.5V); supplies internal VCC when higher than V2. |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold programming | 27 unique V1/V2/tolerance combinations via three 3-state pins-eliminates BOM proliferation across voltage variants. |
| Glitch-immune reset generation | Integrated low-pass filtering + 200ms timeout prevents false resets from sub-5Hz supply noise without sacrificing accuracy. |
| Single-supply self-powering | Derives VCC from greater of V1 or V2-no auxiliary supply needed, simplifying layout and reducing component count. |
| Low-voltage fault coverage | Guaranteed RST assertion and correct logic state down to 1V input-ensures reset integrity during severe brownout. |
| Space-optimized packaging | TSOT-23-8 footprint (1.95mm × 2.80mm) saves >50% board area vs. SOIC-8 while maintaining hand-solderability. |
Applications
| Desktop Computers | Network Servers |
|---|---|
Use Scenario: Monitoring 5V standby and 3.3V main rails during cold boot and AC power recovery. 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 rails settle before release; ±1.5% accuracy avoids premature reset at marginal 4.7V 5V rail. | Use Scenario: Coordinating power sequencing across redundant 12V DC-DC outputs and 3.3V FPGA I/O banks. IC Role / Device Role / Timing Role: Single-point reset arbiter detecting undervoltage on any critical rail and holding system in reset until all recover. Use Value: Eliminates need for discrete comparators and RC timers; 200ms delay matches typical server BIOS initialization windows. |
| Handheld Devices | Core/I/O Voltage Monitoring |
Use Scenario: Validating battery-backed 3.3V system rail and 1.8V application processor core rail during wake-from-sleep transitions. IC Role / Device Role / Timing Role: Low-quiescent dual monitor enabling fast, deterministic wake-up with minimal leakage impact on battery life. Use Value: 0.4–1.0μA V2 input current preserves battery runtime; TSOT-23-8 footprint fits tight mobile PCB layouts. | Use Scenario: Simultaneous supervision of 2.5V core logic and 1.2V DDR memory termination voltage in embedded controllers. IC Role / Device Role / Timing Role: Precision dual-threshold detector with 10% tolerance setting for relaxed margining on noisy I/O supplies. Use Value: Programmable tolerance avoids overdesign; ±1.5% accuracy ensures core remains functional down to 2.375V under worst-case drift. |
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 3.3V/5V monitor with 200ms delay; no dual-rail capability or programmable thresholds. | Requires two devices for dual-rail monitoring; lacks V1/V2 flexibility and tolerance selection. | Select only if monitoring identical rails or when board space permits dual placement. |
| TPS3808G18DBVR | Single-channel supervisor with adjustable delay (1ms–10s); no dual-input comparison or pin-selectable thresholds. | Cannot monitor two independent rails simultaneously; requires external logic for ANDed reset generation. | Choose when precise delay tuning is critical and dual-rail monitoring is handled externally. |
Compared with MAX6816EUT+T and TPS3808G18DBVR, the LTC2904CTS8#TRMPBF uniquely integrates dual-rail comparison, 27-programmable threshold/tolerance combinations, and self-powered operation in a single TSOT-23-8 package-reducing component count, PCB area, and design validation effort for multi-rail systems.
Availability
LTC2904CTS8#TRMPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and handheld devices requiring stable component supply, commercial-temperature grade reliability, and long-term production continuity.
Supply support for LTC2904CTS8#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-precision analog product lines, including supervisors, references, and signal conditioning ICs.
The LTC2904CTS8#TRMPBF belongs to Linear's precision power monitoring family, engineered for systems demanding accurate, glitch-immune reset generation across multiple voltage domains without external passive components.
FAQ
What is the operating temperature range for the LTC2904CTS8#TRMPBF?
The LTC2904CTS8#TRMPBF is specified for 0°C to 70°C ambient operation (Commercial grade). This range is confirmed in the "ORDER INFORMATION" table of the datasheet, where "LTC2904CTS8#TRMPBF" is explicitly listed with "0°C to 70°C" under Temperature Range. It is not rated for industrial or extended temperature operation.
Does the LTC2904CTS8#TRMPBF support adjustable reset delay?
No, the LTC2904CTS8#TRMPBF does not support adjustable reset delay. It is the LTC2904 variant, which provides a fixed 200ms reset timeout. Adjustable delay is exclusive to the LTC2905 family (e.g., LTC2905CTS8#TRMPBF), which uses an external capacitor on the TMR pin. The LTC2904CTS8#TRMPBF has RST on Pin 2 and RST on Pin 3-no TMR pin is present.
Can the LTC2904CTS8#TRMPBF monitor a 1.0V rail?
Yes, the LTC2904CTS8#TRMPBF can monitor a 1.0V rail as V2. Per Table 1 in the datasheet, "V2 = 1.0V" is a supported configuration when V1 = 2.5V and S1 = V1, S2 = GND. The device guarantees correct RST logic state for V1 ≥ 1V or V2 ≥ 1V, and the 1.0V, 10% threshold is specified as 0.900V (min) to 0.950V (max) in the Electrical Characteristics table.
What is the maximum input voltage allowed on V1 or V2 for the LTC2904CTS8#TRMPBF?
The absolute maximum rating for V1 and V2 is –0.3V to 7V, as stated in the "ABSOLUTE MAXIMUM RATINGS" section. This 7V limit applies regardless of operating mode or temperature. Exceeding 7V risks permanent damage, even momentarily. The device is intended for monitoring rails up to 5.0V nominal, but the 7V headroom accommodates transient overshoots.
Is an external pull-up resistor required on the RST pin of the LTC2904CTS8#TRMPBF?
An external pull-up resistor is not required but may be beneficial. The LTC2904CTS8#TRMPBF features a weak internal ~6μA pull-up to VCC (the greater of V1 or V2), sufficient for slow-rise applications. However, if faster rise time or VOH > VCC is needed, a 10kΩ external pull-up reduces rise time from ~86μs to ~3.3μs (per Application Information Section). Use external pull-up only when timing or voltage-level requirements exceed internal capability.
LTC2904CTS8#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:
- 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#TRMPBF FAQ
1.How can I place an order for LTC2904CTS8#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2904CTS8#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 LTC2904CTS8#TRMPBF reliable?
The price and inventory of LTC2904CTS8#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2904CTS8#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2904CTS8#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2904CTS8#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2904CTS8#TRMPBF?
LTC2904CTS8#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2904CTS8#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 LTC2904CTS8#TRMPBF?
For technical support, including LTC2904CTS8#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2904CTS8#TRMPBF requirements.
6.How does Aetrix verify that LTC2904CTS8#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2904CTS8#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 LTC2904CTS8#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2904CTS8#TRMPBF?
All LTC2904CTS8#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2904CTS8#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 LTC2904CTS8#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2904CTS8#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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