My Inquiry
My Account
Analog Devices Inc. LTC2904IDDB#TRMPBF
- Part No.:
- LTC2904IDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2904IDDB#TRMPBF.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:868
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2904IDDB#TRMPBF from Analog Devices (acquired Linear Technology) is a precision dual supply monitor IC for systems requiring simultaneous monitoring of two voltage rails with pin-selectable thresholds and fixed 200ms reset delay. It delivers ±1.5% threshold accuracy over –40°C to +85°C, supports V1/V2 inputs from 1.0V to 5.0V in nine combinations, and features open-drain RST output guaranteed functional down to 1V supply. It is used in industrial embedded controllers where reliable power-up sequencing and brownout detection are critical.
For engineers reviewing the LTC2904IDDB#TRMPBF datasheet, LTC2904IDDB#TRMPBF pinout, LTC2904IDDB#TRMPBF application, or LTC2904IDDB#TRMPBF equivalent, key selection criteria include its fixed 200ms reset timeout, DFN-8 (3mm × 2mm) package with exposed GND pad, programmable 5%/7.5%/10% tolerance via TOL pin, and guaranteed RST assertion at V1 ≥ 1V or V2 ≥ 1V - all verified across the full industrial temperature range.
Technical Context
The LTC2904IDDB#TRMPBF integrates two high-accuracy comparators with a bandgap reference and internal resistor network, enabling precise undervoltage detection without external components. Its three-state programming pins (S1, S2, TOL) configure both voltage thresholds and tolerance level, eliminating need for external resistors or trimming.
It uses internal power detect logic powered by the greater of V1 or V2 (VCC), ensuring RST functionality begins at ≥1V input. The reset pulse generator provides glitch immunity via integrated low-pass filtering and a fixed 200ms timeout, preventing false triggers from transient supply noise while maintaining tight ±1.5% threshold accuracy over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Timeout | 200ms nominal; ensures system reset remains asserted long enough for microcontroller initialization and stable power rail settling. |
| Threshold Accuracy | ±1.5% over –40°C to +85°C; guarantees trip point stays within 75mV of 4.675V for 5V/5% configuration, enabling tighter system margining. |
| V1/V2 Input Range | 1.0V to 5.0V; supports common rails including 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, and 1.0V with nine preconfigured combinations. |
| RST Output Type | Open-drain with weak internal pull-up to VCC; enables wired-OR reset bus sharing and compatibility with 1.8V–5V logic families. |
| Minimum Operating Voltage | V1 ≥ 1V or V2 ≥ 1V; ensures RST asserts correctly during deep brownout conditions before system logic fails. |
| Supply Tolerance Options | 5%, 7.5%, or 10% via TOL pin; allows matching reset threshold to system-level voltage regulation spec without redesign. |
| Package | 8-lead DFN (3mm × 2mm) with exposed GND pad; provides low thermal resistance (θJA = 76°C/W) and space-efficient layout for dense PCBs. |
Pinout & Package
Package: 8-lead plastic DFN (3mm × 2mm), exposed pad soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V2 (Pin 1) | Voltage Input 2 | Monitors second rail (1.0V–3.3V); also contributes to internal VCC generation when greater than V1. |
| RST (Pin 2) | Reset Output | Active-low open-drain output; asserts low when either V1 or V2 falls below programmed threshold and holds for 200ms after recovery. |
| RST (Pin 3) | Inverted Reset Output | Complementary to Pin 2; pulls low only when both supplies are valid - used for active-high reset logic or status indication. |
| GND (Pin 4) | Ground Reference | Primary signal and power return; exposed pad (Pin 9) must be soldered to PCB ground plane. |
| TOL (Pin 5) | Tolerance Select Input | Three-state pin (V1/Open/GND) sets common tolerance: 5%/7.5%/10% for both V1 and V2 thresholds. |
| S1 (Pin 6) | Threshold Select Input | Three-state pin defining V1/V2 combination per Table 1; e.g., V1=3.3V/V2=1.2V when S1=Open/S2=Open. |
| S2 (Pin 7) | Threshold Select Input | Second three-state pin completing V1/V2 pair selection; works jointly with S1 and TOL for full configuration. |
| V1 (Pin 8) | Voltage Input 1 | Monitors primary rail (2.5V–5.0V); determines VCC if higher than V2, powering internal circuitry and RST drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable thresholds | 9 V1/V2 combinations (e.g., 5V/3.3V, 3.3V/1.2V) set via S1/S2 without external resistors - reduces BOM count and layout complexity. |
| ±1.5% threshold accuracy | Maintains trip point stability across –40°C to +85°C, enabling robust operation in industrial environments without calibration. |
| Glitch-immune reset logic | Integrated low-pass filter + 200ms timeout prevents false resets from sub-5kHz supply transients - eliminates need for external RC filters. |
| 1V minimum operating input | RST remains functional even when V1 or V2 drops to 1V, supporting fail-safe detection in deep brownout scenarios. |
| Space-optimized DFN package | 3mm × 2mm footprint with thermal pad achieves 76°C/W θJA - suitable for thermally constrained embedded modules. |
Applications
| Industrial PLC Power Sequencing | Network Switch Core/I/O Rail Monitoring |
|---|---|
Use Scenario: Monitoring 3.3V core and 1.2V I/O rails in an Ethernet switch ASIC power domain during cold start and hot-swap events. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset to FPGA and PHY controllers only after both rails stabilize above 3.135V and 1.122V (3.3V/1.2V @ 5% tol). Use Value: Prevents partial initialization by enforcing 200ms hold time, ensuring clock PLLs lock and memory interfaces settle before release. | Use Scenario: Ensuring safe power-up of 5V auxiliary and 2.5V management controller rails in a modular network switch line card. IC Role / Device Role / Timing Role: Simultaneous monitoring with 5V/2.5V configuration (S1=GND, S2=GND) and 7.5% tolerance to accommodate DC/DC converter ripple. Use Value: ±1.5% accuracy avoids unnecessary resets caused by normal 40mV ripple on 5V rail, improving system uptime. |
| Medical Diagnostic Imaging Subsystem | Automotive Infotainment Head Unit |
Use Scenario: Supervising 3.3V sensor interface and 1.8V ADC reference rails in a portable ultrasound front-end module. IC Role / Device Role / Timing Role: Detecting undervoltage on either rail and asserting RST to halt data acquisition until both supplies recover above 3.086V and 1.683V (3.3V/1.8V @ 5% tol). Use Value: Open-drain RST allows wired-OR connection with other supervisors, enabling centralized reset arbitration across subsystems. | Use Scenario: Monitoring 5V infotainment processor and 3.3V display interface rails subject to automotive load-dump transients. IC Role / Device Role / Timing Role: Providing 200ms reset hold time after brownout recovery to prevent MCU lockup during engine cranking. Use Value: Guaranteed RST function down to 1V input ensures reset assertion remains valid even during severe battery sag to 9V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G18DBVR | Single-supply monitor (1.8V only); no dual-rail capability; 200ms fixed delay; ±2.0% threshold accuracy. | Cannot replace LTC2904IDDB#TRMPBF in dual-rail systems; requires separate devices for each rail. | Select only when monitoring a single 1.8V rail with identical timing and lower accuracy acceptable. |
| MAX6816EUT+T | Dual-supply monitor with adjustable delay (external cap); ±2.5% threshold accuracy; TSOT-23-6 package. | Lacks three-state programming - fixed 3.3V/2.5V thresholds; no tolerance selection; smaller package but no exposed thermal pad. | Choose for cost-sensitive designs where 3.3V/2.5V pairing suffices and ±2.5% accuracy meets system margin. |
Compared with TPS3808G18DBVR and MAX6816EUT+T, the LTC2904IDDB#TRMPBF uniquely supports nine programmable dual-rail combinations and ±1.5% accuracy in a thermally enhanced DFN, making it optimal for industrial systems requiring flexible, high-precision, and robust power supervision.
Availability
LTC2904IDDB#TRMPBF is available at Aetrix Electronics and suitable for industrial control systems, network infrastructure equipment, and medical diagnostic devices requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature range (–40°C to +85°C) performance.
Supply support for LTC2904IDDB#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2904IDDB#TRMPBF belongs to ADI's precision power supervision product line, engineered for mission-critical embedded systems where deterministic reset behavior, wide temperature operation, and minimal external components are essential design requirements.
FAQ
What is the operating temperature range of the LTC2904IDDB#TRMPBF?
The LTC2904IDDB#TRMPBF is rated for –40°C to +85°C, meeting industrial-grade environmental requirements. This range is confirmed in the "ORDER INFORMATION" table of the datasheet, where the "I" grade suffix denotes the –40°C to +85°C specification. The device maintains ±1.5% threshold accuracy across this full range, ensuring reliable reset behavior in demanding thermal environments without derating.
Does the LTC2904IDDB#TRMPBF support adjustable reset timeout?
No, the LTC2904IDDB#TRMPBF has a fixed 200ms reset timeout period. Adjustable timeout is exclusive to the LTC2905 variant, which uses an external capacitor on the TMR pin. The LTC2904IDDB#TRMPBF implements a dedicated internal timer for consistent 200ms delay, simplifying design by eliminating capacitor selection and placement - a key differentiator for applications requiring deterministic, repeatable reset timing.
How do I configure the LTC2904IDDB#TRMPBF for 3.3V and 1.2V monitoring with 5% tolerance?
To configure the LTC2904IDDB#TRMPBF for 3.3V/1.2V monitoring at 5% tolerance, connect S1 to Open, S2 to Open, and TOL to V1 (per Table 1 and Table 2 in the datasheet). This selects the V1=3.3V/V2=1.2V combination with 5% tolerance, yielding nominal thresholds of 3.086V and 1.122V. Ensure both V1 and V2 are bypassed with ≥0.1μF capacitors to ground for stable operation.
Can the LTC2904IDDB#TRMPBF operate with only one supply voltage applied?
Yes - the LTC2904IDDB#TRMPBF functions with only V1 or only V2 present, provided that voltage is ≥1V. Its internal VCC is derived from the greater of V1 or V2, so if only V1 = 3.3V is applied, VCC = 3.3V and RST operates normally. If only V2 = 1.5V is applied, VCC = 1.5V and RST remains functional. However, dual-rail monitoring requires both inputs to be active and above their respective thresholds to deassert reset.
What is the purpose of the exposed pad on the DFN package of the LTC2904IDDB#TRMPBF?
The exposed pad (Pin 9) on the LTC2904IDDB#TRMPBF's DFN package is electrically and thermally connected to GND. It must be soldered to a PCB ground plane to achieve the specified θJA of 76°C/W and ensure reliable thermal dissipation. Leaving it unconnected degrades thermal performance and may cause premature device failure under sustained load or elevated ambient temperatures.
LTC2904IDDB#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:
- 2
- Voltage - Threshold:
- 9 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- 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 (3x2)
LTC2904IDDB#TRMPBF FAQ
1.How can I place an order for LTC2904IDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2904IDDB#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 LTC2904IDDB#TRMPBF reliable?
The price and inventory of LTC2904IDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2904IDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2904IDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2904IDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2904IDDB#TRMPBF?
LTC2904IDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2904IDDB#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 LTC2904IDDB#TRMPBF?
For technical support, including LTC2904IDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2904IDDB#TRMPBF requirements.
6.How does Aetrix verify that LTC2904IDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2904IDDB#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 LTC2904IDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2904IDDB#TRMPBF?
All LTC2904IDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2904IDDB#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 LTC2904IDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2904IDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2904IDDB#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…
