My Inquiry
My Account
Analog Devices Inc. LTC2915IDDB-1#TRMPBF
- Part No.:
- LTC2915IDDB-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2915IDDB-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,758
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2915IDDB-1#TRMPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 27 selectable reset thresholds, designed for reliable power-on reset and supply monitoring in automotive and industrial systems. It operates from 1.5V to 5.5V supply, consumes only 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 125°C, and features glitch-immune open-drain RST output with 200ms internal timeout - used in engine control units to ensure microcontroller initialization under cold-crank conditions.
For engineers reviewing the LTC2915IDDB-1#TRMPBF datasheet, LTC2915IDDB-1#TRMPBF pinout, LTC2915IDDB-1#TRMPBF application, or LTC2915IDDB-1#TRMPBF equivalent, key selection criteria include its 8-pin DFN (3mm × 2mm) package, three-state SEL1/SEL2/TOL input configuration for 9 nominal voltages and 3 tolerances, guaranteed RST assertion down to VCC = 0.8V, and operation up to 125°C without derating.
Technical Context
The LTC2915IDDB-1#TRMPBF implements a precision comparator-based supervision architecture with internally trimmed reference dividers and programmable hysteresis via TOL pin selection (–5%, –10%, –15%). Its VM input monitors external supply rails using nine fixed thresholds (12V to 1.0V + ADJ) or an adjustable 0.5V reference point, with all trip points guaranteed within ±1.5% across temperature.
Reset timing is controlled either by internal 200ms timer (RT tied to VCC), external capacitor (9ms/nF scaling), or ~400μs default (RT floating). The device integrates a 6.2V shunt regulator on VCC to support high-voltage operation (e.g., 12V automotive battery), requiring only a series resistor when VCC > 5.7V - enabling direct connection to unregulated supplies without external LDO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - supports direct connection to logic rails; shunt regulation extends usable range to 12V with external resistor |
| Threshold Accuracy | ±1.5% over –40°C to 125°C - ensures reliable reset assertion across full automotive temperature range without calibration |
| Quiescent Current | 30μA typical - enables always-on monitoring in battery-backed or low-power systems without significant drain |
| Reset Timeout | 200ms internal (RT = VCC) - meets JEDEC JESD78B minimum reset pulse width for microcontrollers |
| RST Output Type | Open-drain - allows wired-OR of multiple supervisors and interface to any logic voltage ≤6.5V |
| VM Input Impedance | 0.5MΩ to 8MΩ - minimizes loading on monitored supply; enables use with high-impedance resistive dividers for ADJ mode |
| Guaranteed RST Low | VCC ≥ 0.8V - ensures valid reset signal during brown-out and cold-crank scenarios where supply dips below 1.0V |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN with exposed pad (Pin 9), rated for –40°C to 125°C operation. RoHS-compliant, lead-free finish, tape-and-reel packaging (TRMPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM (Pin 4) | Voltage Monitor Input | High-impedance comparator input; threshold set by SEL1/SEL2/TOL; supports ADJ mode at 0.5V reference |
| SEL1 (Pin 3) | Nominal Threshold Select | Three-state input (VCC/GND/Open) selecting one of nine preset voltages (e.g., 12V, 5V, 1.8V, ADJ) |
| TOL (Pin 2) | Tolerance Selection | Three-state input (VCC/GND/Open) setting –5%, –10%, or –15% tolerance band around nominal threshold |
| GND (Pin 1) | Device Ground Reference | Primary ground return for internal circuitry and RST pull-down; exposed pad may be connected here |
| RST (Pin 8) | Open-Drain Reset Output | Asserts low when VM < threshold; held low for timeout after recovery; requires external pull-up |
| RT (Pin 7) | Reset Timeout Control | Configures timer: VCC = 200ms, GND = adjustable (9ms/nF), floating = ~400μs |
| SEL2 (Pin 6) | Nominal Threshold Select | Second three-state input completing 3-bit encoding of 9 nominal thresholds per Table 1 |
| VCC (Pin 5) | Power Supply Input | Supplies internal circuitry; includes 6.2V shunt regulator for operation from >5.7V supplies |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | 9 nominal voltages × 3 tolerances enables precise match to system supply specs without external resistors |
| Glitch Immunity | Combined anti-glitch circuitry and configurable timeout prevents false resets from load transients or noise near threshold |
| 125°C Operation | Qualified for automotive under-hood applications including engine control, transmission, and ADAS modules |
| Low-Voltage RST Assertion | Guaranteed RST low at VCC ≥ 0.8V ensures reset validity during severe brown-out conditions |
| Shunt Regulator Integration | 6.2V VCC shunt eliminates need for external LDO when monitoring 12V automotive battery directly |
Applications
| Engine Control Unit (ECU) Power Monitoring | Industrial PLC I/O Module Supervision |
|---|---|
Use Scenario: Monitors 5V MCU core supply and 12V sensor excitation rail in diesel ECU during cold-crank (battery dip to 6V). IC Role / Device Role / Timing Role: Voltage supervisor asserting RST until both supplies stabilize above 4.75V (5V–5%) and 11.4V (12V–5%), with 200ms timeout ensuring clean processor boot. Use Value: Prevents erratic MCU behavior during start-up by guaranteeing reset remains asserted until supplies meet tightened tolerance bands under worst-case temperature and voltage stress. | Use Scenario: Supervises isolated 3.3V digital logic and 24V fieldbus interface in modular PLC backplane. IC Role / Device Role / Timing Role: Dual-rail monitoring using separate LTC2915IDDB-1#TRMPBF instances; VM inputs tied to post-isolation DC/DC outputs; RST outputs wire-OR'd to central watchdog. Use Value: Enables independent fault detection per rail while maintaining single reset bus, reducing board space vs. quad-supervisor ICs and supporting hot-swap module insertion. |
| Automotive Infotainment Head Unit | Medical Diagnostic Imaging Power Sequencing |
Use Scenario: Ensures proper power-up sequence for SoC, DDR memory, and display driver in 12V-powered infotainment system. IC Role / Device Role / Timing Role: Configured for 1.8V (SoC core), 3.3V (I/O), and ADJ (1.0V DDR termination) thresholds; TOL pins set to –5% for tight margining. Use Value: Eliminates need for discrete resistor networks and trim pots, reducing BOM count and improving long-term stability of reset thresholds across thermal cycling. | Use Scenario: Validates stable 1.2V FPGA core and 1.8V ADC reference supplies before enabling X-ray detector acquisition cycle. IC Role / Device Role / Timing Role: LTC2915IDDB-1#TRMPBF monitors each rail independently; RST outputs feed FPGA's configuration state machine to gate critical timing paths. Use Value: Guarantees ±1.5% threshold accuracy at 85°C ambient - essential for preventing data corruption in high-resolution image capture where supply droop causes bit errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2916IDDB-1#TRMPBF | Fixed –5% tolerance; includes MR pin for push-button reset; identical pinout and package | Preferred where manual reset is required (e.g., field service, firmware recovery); no TOL pin needed | Select LTC2916IDDB-1#TRMPBF if system requires hardware-initiated reset; otherwise LTC2915IDDB-1#TRMPBF offers finer tolerance control for margin testing |
| LTC2903CMS8-3.3#PBF | Fixed 3.3V threshold; 6-Lead SOT-23; ±0.75% accuracy; no adjustable timeout or shunt regulator | Suitable only for single-rail 3.3V systems with minimal footprint; lacks multi-threshold flexibility and high-voltage capability | Choose LTC2903CMS8-3.3#PBF for cost-sensitive, single-supply designs where 3.3V monitoring suffices and PCB area is constrained |
Compared with LTC2916IDDB-1#TRMPBF, the LTC2915IDDB-1#TRMPBF provides selectable tolerance for production margining but lacks manual reset; versus LTC2903CMS8-3.3#PBF, it delivers broader voltage coverage, higher accuracy tolerance bands, and integrated shunt regulation - making it superior for multi-rail automotive and industrial applications demanding configurability and robustness.
Availability
LTC2915IDDB-1#TRMPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and medical diagnostic imaging systems requiring stable component supply with guaranteed 125°C operation and long-term lifecycle support.
Supply support for LTC2915IDDB-1#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2915 belongs to Linear's precision voltage supervisor product line, engineered specifically for mission-critical power monitoring in harsh environments where reliability, accuracy, and extended temperature operation are non-negotiable design requirements.
FAQ
What is the maximum supply voltage the LTC2915IDDB-1#TRMPBF can tolerate on its VCC pin?
The LTC2915IDDB-1#TRMPBF has an absolute maximum VCC rating of 5.7V. However, its integrated 6.2V shunt regulator allows operation from higher voltages (e.g., 12V automotive battery) when a current-limiting resistor is placed between the supply and VCC pin. Without that resistor, exceeding 5.7V risks violating the ±5mA terminal current limit and damaging the device. Always refer to the shunt regulator design equations in the datasheet for proper resistor sizing.
How do I configure the LTC2915IDDB-1#TRMPBF to monitor a 1.5V supply with –10% tolerance?
To monitor 1.5V at –10% tolerance using the LTC2915IDDB-1#TRMPBF, set SEL1 = Open, SEL2 = GND (per Table 1), and TOL = Open (per Table 2). This configures the device for the 1.5V nominal threshold with –10% tolerance, resulting in a trip point of 1.35V ±1.5% (1.330V to 1.370V). Ensure VM is connected directly to the 1.5V rail and bypass VCC with a 0.1μF ceramic capacitor.
Does the LTC2915IDDB-1#TRMPBF require external components to generate a 200ms reset timeout?
No, the LTC2915IDDB-1#TRMPBF does not require external components for a 200ms reset timeout. Simply tie the RT pin to VCC, and the internal timer will generate a guaranteed 150ms to 260ms timeout (typical 200ms) across temperature. This eliminates the need for timing capacitors and associated PCB area in applications where fixed delay is acceptable.
Can the LTC2915IDDB-1#TRMPBF monitor a supply voltage higher than 5.5V?
Yes, the LTC2915IDDB-1#TRMPBF can monitor supplies >5.5V using its ADJ mode. Configure SEL1 = GND and SEL2 = GND to select the ADJ (0.5V) threshold, then connect VM to a resistive divider from the high-voltage rail to ground. Size R1 and R2 so VM = 0.5V at the nominal rail voltage (e.g., 24V), accounting for ±1.5% accuracy. The internal comparator references 0.5V, enabling precise supervision of any voltage.
What is the purpose of the exposed pad on the LTC2915IDDB-1#TRMPBF DFN package?
The exposed pad (Pin 9) on the LTC2915IDDB-1#TRMPBF DFN package serves as a thermal and electrical connection point. While optional, connecting it to PCB ground improves thermal dissipation (reducing θJA from 76°C/W to lower effective value) and enhances noise immunity. It must be solder-plated per JEDEC standards and does not require electrical connection for basic functionality, but grounding is strongly recommended for automotive and industrial applications operating at 125°C.
LTC2915IDDB-1#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:
- 27 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2915IDDB-1#TRMPBF FAQ
1.How can I place an order for LTC2915IDDB-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2915IDDB-1#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 LTC2915IDDB-1#TRMPBF reliable?
The price and inventory of LTC2915IDDB-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2915IDDB-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2915IDDB-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2915IDDB-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2915IDDB-1#TRMPBF?
LTC2915IDDB-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2915IDDB-1#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 LTC2915IDDB-1#TRMPBF?
For technical support, including LTC2915IDDB-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2915IDDB-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2915IDDB-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2915IDDB-1#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 LTC2915IDDB-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2915IDDB-1#TRMPBF?
All LTC2915IDDB-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2915IDDB-1#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 LTC2915IDDB-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2915IDDB-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2915IDDB-1#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…
