My Inquiry
My Account
Analog Devices Inc. LTC2918HDDB-B1#TRPBF
- Part No.:
- LTC2918HDDB-B1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2918HDDB-B1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,306
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2918HDDB-B1#TRPBF from Analog Devices (formerly Linear Technology) is a high-temperature voltage supervisor IC with 9 selectable supply thresholds, fixed –5% tolerance, manual reset input (MR), and windowed watchdog timer. It operates from 1.5V to 5.5V supply, consumes 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 125°C, and supports automotive control systems requiring robust power-up/power-down sequencing and glitch-immune reset assertion.
For engineers reviewing the LTC2918HDDB-B1#TRPBF datasheet, LTC2918HDDB-B1#TRPBF pinout, LTC2918HDDB-B1#TRPBF application, or LTC2918HDDB-B1#TRPBF equivalent, this page delivers verified technical context, exact pin functions, real-world timing values (e.g., tRST = 200ms internal, tWDU = 1.6s internal), and validated alternatives for industrial and automotive embedded designs.
Technical Context
The LTC2918HDDB-B1#TRPBF implements a dual-stage supervision architecture: a precision comparator monitors VM against one of nine internally programmed thresholds selected via SEL1/SEL2 (three-state logic), while a windowed watchdog timer enforces strict timing boundaries on WDI falling edges - requiring both upper (tWDU = 1.6s) and lower (tWDL = 50ms) timeout limits to be met. Its RST output is open-drain with guaranteed low-voltage operation down to VCC ≥ 0.8V.
It integrates an internal 6.2V shunt regulator on VCC for direct 12V supply compatibility (with external series resistor), features glitch filtering with <150μs immunity for transients exceeding 5% of threshold, and uses internal reference division to maintain ±1.5% threshold accuracy across full temperature range without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - supports direct connection to common logic rails; shunt regulation enables 12V operation with series resistor |
| Threshold Accuracy | ±1.5% over –40°C to 125°C - ensures reliable trip point margining against 5V±10% or 3.3V±5% supplies |
| Quiescent Current | 30μA typical - enables always-on monitoring in battery-backed or low-power automotive modules |
| Reset Timeout (Internal) | 200ms (RT tied to VCC) - provides sufficient hold time for microcontroller initialization and clock stabilization |
| Watchdog Upper Boundary | 1.6s (WT tied to VCC) - matches typical firmware main-loop execution windows in safety-critical ECUs |
| Watchdog Lower Boundary | 50ms (B1 version only) - prevents false resets from spurious noise while enforcing minimum watchdog pulse interval |
| Manual Reset Input | MR active-low with 100kΩ internal pull-up - enables push-button reset without external components |
Pinout & Package
Package: 10-lead (3mm × 2mm) plastic DFN with exposed pad (pin 11, optional GND connection). Pin count and layout match MSOP-10 but with smaller footprint and improved thermal performance (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for all internal circuits; must be low-impedance connection to system ground plane |
| MR | Manual reset input | Active-low signal with internal 100kΩ pull-up; asserts RST for tRST after falling edge - enables hardware-initiated recovery |
| SEL2 | Threshold select bit 1 | Three-state input (VCC/GND/open) selecting nominal VM threshold per Table 1 - determines 1.8V, 3.3V, 5V, etc. monitoring point |
| SEL1 | Threshold select bit 0 | Three-state input (VCC/GND/open) completing 9-threshold selection matrix - no external resistors required |
| VM | Monitor input | High-impedance comparator input (0.5MΩ min); senses supply voltage directly or via external divider for ADJ mode |
| RST | Open-drain reset output | Asserts low during undervoltage or watchdog fault; requires external pull-up; compatible with wired-OR configurations |
| RT | Reset timeout control | Capacitor-adjustable timer input (9ms/nF); tie to VCC for 200ms fixed timeout - sets duration RST remains asserted |
| WT | Watchdog timeout control | Capacitor-adjustable window timer input (72ms/nF); tie to VCC for 1.6s upper bound - defines valid WDI pulse period window |
| WDI | Watchdog input | Falling-edge-sensitive input (B1 version); must toggle within tWDL–tWDU window or trigger reset - enforces software liveness |
| VCC | Power supply input | Operates as direct supply (≤5.5V) or shunt-regulated input (up to 12V with series resistor); internal 6.2V clamp protects circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Enforces both minimum (50ms) and maximum (1.6s) WDI pulse intervals - eliminates false resets from noise while detecting hung firmware |
| 9-pin-selectable thresholds | Eliminates external resistor networks for 12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1.0V, and ADJ (0.5V) monitoring - reduces BOM and layout complexity |
| Guaranteed operation to 125°C | Validated for under-hood automotive applications including engine control units and transmission controllers - no derating required |
| Glitch-immune reset detection | Combines 150μs minimum pulsewidth requirement (tUV) and 200ms timeout to reject load transients and EMI without compromising threshold accuracy |
| Manual reset with integrated pull-up | MR pin includes 100kΩ internal pull-up - enables momentary push-button interface with zero external components |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 5V microcontroller supply in diesel engine ECU exposed to –40°C to 125°C ambient. IC Role / Device Role / Timing Role: Voltage supervisor asserting RST during cold cranking dips below 4.35V (5V–13%), with 200ms reset hold and windowed watchdog verifying firmware execution. Use Value: Prevents undefined MCU state during voltage sag; 50ms–1.6s WDI window rejects ignition noise while catching stuck loops. |
Use Scenario: Coordinating startup of FPGA, ADC, and communication ICs in modular PLC backplane. IC Role / Device Role / Timing Role: Generates synchronized reset pulse after 3.3V rail stabilizes, using RT-tied-to-VCC for 200ms delay and MR for field-service recovery. Use Value: Eliminates need for discrete RC timers; manual reset allows hot-swap module reinitialization without full system reboot. |
| Telecom Base Station PSU Monitor | Medical Infusion Pump Safety Circuit |
Use Scenario: Supervising 12V auxiliary supply feeding fan controllers and sensors in outdoor 5G base station. IC Role / Device Role / Timing Role: Uses VCC shunt regulation to accept 12V input directly; SEL1/SEL2 set to 12V mode; WT tied to VCC for 1.6s watchdog. Use Value: Reduces component count vs. discrete shunt + supervisor; windowed watchdog detects firmware lockups that could disable cooling. |
Use Scenario: Ensuring fail-safe shutdown if main MCU fails during drug delivery cycle in Class II medical device. IC Role / Device Role / Timing Role: Monitors 1.8V logic rail; MR connected to emergency stop button; RST drives hardware latch disabling motor driver. Use Value: Meets IEC 62304 SW safety requirements via hardware-enforced reset; 125°C rating supports sterilization temperature margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D3+T | Fixed 2.93V threshold, no manual reset, no windowed watchdog, 1.6μA IQ | Suitable only for single-rail monitoring; lacks multi-threshold flexibility and MR for service access | Select when ultra-low power (<2μA) is critical and only 2.93V supervision is needed |
| TPS3808G33DBVR | Fixed 3.3V threshold, adjustable reset timeout (1.25ms–10s), no watchdog, –40°C to 125°C | Supports longer timeouts but lacks windowed watchdog and manual reset - less suitable for safety-critical firmware validation | Choose for cost-sensitive 3.3V-only applications where extended timeout flexibility outweighs watchdog reliability needs |
Compared with MAX6326UT29D3+T and TPS3808G33DBVR, the LTC2918HDDB-B1#TRPBF uniquely combines 9 programmable thresholds, manual reset, and windowed watchdog in a single 10-lead DFN package rated to 125°C - making it the only option meeting full functional and environmental requirements for automotive and industrial safety systems.
Availability
LTC2918HDDB-B1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, telecom base station power supplies, and medical infusion pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2918HDDB-B1#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) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving aerospace, automotive, industrial, and communications markets.
The LTC2918HDDB-B1#TRPBF belongs to Linear's precision voltage supervisor product line, designed specifically for mission-critical embedded systems where deterministic reset behavior, wide temperature operation, and hardware-enforced firmware liveness verification are mandatory.
FAQ
What is the operating temperature range of the LTC2918HDDB-B1#TRPBF?
The LTC2918HDDB-B1#TRPBF is specified for operation from –40°C to 125°C, with full electrical performance guaranteed across this range. This H-grade qualification makes it suitable for under-hood automotive applications, industrial environments with high ambient heat, and equipment requiring extended thermal margin during sterilization or burn-in.
How does the windowed watchdog function differ between LTC2918HDDB-B1#TRPBF and non-B versions?
The LTC2918HDDB-B1#TRPBF implements a true windowed watchdog requiring WDI falling edges to occur strictly between tWDL = 50ms and tWDU = 1.6s - rejecting both too-fast and too-slow toggles. Non-B versions (e.g., A1) only enforce the upper boundary, making the B1 variant essential for high-reliability applications where noise-induced false resets must be eliminated.
Can the LTC2918HDDB-B1#TRPBF monitor a 12V supply directly?
Yes - the LTC2918HDDB-B1#TRPBF includes an internal 6.2V shunt regulator on the VCC pin. To monitor 12V, connect it through a series current-limiting resistor (e.g., 11kΩ for 12V automotive) to keep VCC pin current ≤5mA. SEL1 and SEL2 are then configured to 'VCC/VCC' to select the 12V threshold mode.
What is the purpose of the MR pin on the LTC2918HDDB-B1#TRPBF?
The MR (Manual Reset) pin on the LTC2918HDDB-B1#TRPBF is an active-low input with internal 100kΩ pull-up to VCC. Asserting MR low initiates a full reset cycle identical to power-on reset - holding RST low for the configured timeout (e.g., 200ms). This enables field-service recovery via push-button without modifying firmware or power cycling.
How is threshold accuracy maintained across temperature for the LTC2918HDDB-B1#TRPBF?
The LTC2918HDDB-B1#TRPBF guarantees ±1.5% threshold accuracy over –40°C to 125°C by using a trimmed bandgap reference and matched internal resistor dividers. This specification applies to all nine selectable thresholds (e.g., 3.3V, 5V, 12V) and ensures reliable margining against supply tolerances like 3.3V±5% or 5V±10% without external calibration.
LTC2918HDDB-B1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2918HDDB-B1#TRPBF FAQ
1.How can I place an order for LTC2918HDDB-B1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2918HDDB-B1#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 LTC2918HDDB-B1#TRPBF reliable?
The price and inventory of LTC2918HDDB-B1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2918HDDB-B1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2918HDDB-B1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2918HDDB-B1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2918HDDB-B1#TRPBF?
LTC2918HDDB-B1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2918HDDB-B1#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 LTC2918HDDB-B1#TRPBF?
For technical support, including LTC2918HDDB-B1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2918HDDB-B1#TRPBF requirements.
6.How does Aetrix verify that LTC2918HDDB-B1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2918HDDB-B1#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 LTC2918HDDB-B1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2918HDDB-B1#TRPBF?
All LTC2918HDDB-B1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2918HDDB-B1#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 LTC2918HDDB-B1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2918HDDB-B1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2918HDDB-B1#TRPBF 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…
