My Inquiry
My Account
Analog Devices Inc. LTC2917IMS-B1#TRPBF
- Part No.:
- LTC2917IMS-B1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2917IMS-B1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,595
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2917IMS-B1#TRPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 27 selectable reset thresholds, windowed watchdog timer, and manual reset disable - designed for high-reliability embedded systems. It operates from 1.5V to 5.5V supply, consumes only 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to +85°C, and supports 125°C junction temperature. Used in automotive control units to monitor 1.8V/3.3V microcontroller power rails while enforcing strict timing windows on firmware execution.
For engineers reviewing the LTC2917IMS-B1#TRPBF datasheet, LTC2917IMS-B1#TRPBF pinout, LTC2917IMS-B1#TRPBF application, or LTC2917IMS-B1#TRPBF equivalent, key selection criteria include its B1 variant's windowed watchdog (tWDL = 50ms, tWDU = 1.6s), MSOP-10 package compatibility, –40°C to +85°C industrial temperature grade, and absence of manual reset input (distinguishing it from LTC2918 variants).
Technical Context
The LTC2917IMS-B1#TRPBF implements a dual-stage comparator architecture with internal reference trimming and glitch-filtered VM input detection. Its three-state SEL1/SEL2/TOL pins configure one of nine nominal voltages (12V–0.5V ADJ) and three tolerance bands (–5%/–10%/–15%), enabling precise supply margining without external resistors.
It integrates two independent timing circuits: an adjustable reset timeout (via RT pin capacitor or VCC tie) and a windowed watchdog timer (via WT pin capacitor or VCC tie), where falling edges on WDI must occur strictly between tWDL and tWDU boundaries to avoid RST assertion - a feature exclusive to B-version parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - powers directly from logic rails; shunt regulation enables operation up to 12V with series resistor |
| Threshold Accuracy | ±1.5% over –40°C to +85°C - ensures reliable trip point across full industrial temp range without calibration |
| Quiescent Current | 30μA typical - enables always-on monitoring in battery-backed or low-power systems |
| Windowed Watchdog | tWDL = 50ms / tWDU = 1.6s (internal) - prevents both premature and delayed resets in safety-critical firmware supervision |
| Reset Timeout | 200ms (RT tied to VCC) - provides sufficient hold time for microcontroller initialization sequences |
| VM Input Impedance | 0.5–8MΩ - minimizes loading on monitored supply; supports direct connection to low-current rails |
| Operating Temp | –40°C to +85°C (I-grade) - qualified for industrial and under-hood automotive environments |
Pinout & Package
Package: 10-Lead MSOP (3mm × 3mm), RoHS-compliant, exposed pad optional for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground Reference | Primary return path for all internal circuitry and RST output sink |
| TOL | Tolerance Select Input | Three-state pin setting –5% (VCC), –10% (open), or –15% (GND) hysteresis band for VM threshold |
| SEL2 | Voltage Threshold Select | Three-state pin selecting one of nine nominal VM trip points (e.g., GND + VCC = 1.2V) |
| SEL1 | Voltage Threshold Select | Three-state pin completing 3-bit encoding of VM threshold (e.g., VCC + open = 5V) |
| VM | Monitor Input | High-impedance input comparing against programmed threshold; supports ADJ mode at 0.5V reference |
| RST | Open-Drain Reset Output | Asserts low during undervoltage or watchdog fault; requires external pull-up to logic rail |
| RT | Reset Timeout Control | Capacitor-to-GND sets tRST (9ms/nF); tie to VCC for fixed 200ms timeout |
| WT | Watchdog Timer Control | Capacitor-to-GND sets tWDU (72ms/nF); tie to VCC for fixed 1.6s windowed timeout |
| WDI | Watchdog Input | Falling-edge-triggered only in B1 version; must toggle within tWDL–tWDU window to prevent RST |
| VCC | Power Supply Input | Accepts 1.5–5.5V directly; includes 6.2V shunt regulator for >5.7V operation with series resistor |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | Nine nominal voltages × three tolerances enable precise supply margining without external components |
| Windowed Watchdog (B1) | Enforces minimum and maximum watchdog interval - critical for lockup detection in ASIL-B systems |
| Glitch Immunity | Combined 10μs–150μs input filtering and reset timeout prevents false triggers from load transients |
| Guaranteed RST at VCC ≥ 0.8V | Ensures valid reset assertion during brown-out conditions before core logic becomes unstable |
| 10-Lead MSOP Package | Compact 3mm × 3mm footprint with thermal pad option supports high-density automotive PCB layouts |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 3.3V CAN transceiver supply and 1.8V microcontroller core rail in engine bay environment subject to thermal cycling and EMI. IC Role / Device Role / Timing Role: Voltage supervisor asserting RST during undervoltage events and enforcing 50ms–1.6s watchdog window on firmware heartbeat signals. Use Value: Prevents ECU lockup by detecting stalled firmware via windowed watchdog; ±1.5% threshold accuracy ensures no nuisance resets across –40°C to +85°C. | Use Scenario: Supervising 5V FPGA configuration supply and 2.5V I/O bank voltage in factory automation controller with long-term reliability requirements. IC Role / Device Role / Timing Role: Dual-rail supervisor using SEL1/SEL2/TOL to independently configure thresholds and tolerances per rail, with shared watchdog oversight. Use Value: Eliminates need for discrete resistor networks; 30μA quiescent current reduces standby power in always-on control modules. |
| Medical Infusion Pump Controller | Telecom Base Station Power Management |
Use Scenario: Ensuring safe power-up sequencing and runtime integrity of 1.2V DSP supply and 3.3V communication interface in Class II medical device. IC Role / Device Role / Timing Role: Supervisor providing 200ms reset hold time and windowed watchdog to validate real-time motor control loop execution. Use Value: Meets IEC 62304 software safety requirements via deterministic watchdog timing and guaranteed trip accuracy. | Use Scenario: Monitoring redundant 12V backplane supplies feeding distributed 3.3V/1.8V loads in carrier-grade base station with hot-swap capability. IC Role / Device Role / Timing Role: High-voltage supervisor using internal 6.2V shunt regulator and external dropping resistor to supervise 12V rail without auxiliary LDO. Use Value: Reduces BOM count by integrating shunt regulation; 125°C junction rating supports operation near power converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+T | Fixed 2.93V threshold, no programmability, no watchdog, SOT23-3 package | Suitable only for single-rail, non-watchdog applications requiring minimal footprint | Select when simplicity and cost outweigh flexibility; not suitable for multi-rail or firmware supervision needs. |
| TPS3808G33DBVR | Fixed 3.3V threshold, adjustable watchdog (non-windowed), 6-pin SOT23 package | Lacks threshold select and windowed watchdog; lower quiescent current (1.5μA) but limited feature set | Choose for ultra-low-power 3.3V-only monitoring where windowed timing is unnecessary. |
Compared with MAX6326US29D3+T and TPS3808G33DBVR, the LTC2917IMS-B1#TRPBF offers unique configurability across 27 thresholds and mandatory windowed watchdog timing - making it irreplaceable in applications requiring adaptive supply margining and ASIL-compliant firmware supervision.
Availability
LTC2917IMS-B1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, medical infusion pumps, and telecom base stations requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC2917IMS-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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, acquired Linear Technology in 2017 to strengthen its precision power and interface portfolio.
The LTC2917 product line was developed by Linear Technology specifically for high-reliability power monitoring in automotive, industrial, and medical systems - emphasizing guaranteed threshold accuracy, wide temperature operation, and robust watchdog functionality.
FAQ
What is the function of the TOL pin on the LTC2917IMS-B1#TRPBF?
The TOL pin on the LTC2917IMS-B1#TRPBF is a three-state input that selects the tolerance band (–5%, –10%, or –15%) applied to the VM monitor threshold. When tied to VCC, it configures –5%; left open, –10%; tied to GND, –15%. This enables precise supply margining without external components - a key differentiator of the LTC2917IMS-B1#TRPBF versus fixed-threshold supervisors.
Does the LTC2917IMS-B1#TRPBF support manual reset functionality?
No, the LTC2917IMS-B1#TRPBF does not include a manual reset (MR) input. That feature is exclusive to the LTC2918 family. The LTC2917IMS-B1#TRPBF relies solely on VM undervoltage detection and watchdog timeout for RST assertion. If manual reset is required, the LTC2918IMS-B1#TRPBF - which shares identical threshold, watchdog, and timing specifications - should be selected instead.
How is the windowed watchdog timer configured on the LTC2917IMS-B1#TRPBF?
The windowed watchdog timer on the LTC2917IMS-B1#TRPBF is enabled by default in the B1 version. It requires falling edges on the WDI pin to occur strictly between tWDL (50ms) and tWDU (1.6s) - both internally fixed values. No external components are needed; tying WT to VCC selects the 1.6s upper boundary, and the lower boundary is automatically set to 1/32 of the upper boundary for external capacitors or fixed at 50ms for internal timing. This behavior is intrinsic to the LTC2917IMS-B1#TRPBF silicon design.
Can the LTC2917IMS-B1#TRPBF monitor a 12V supply directly?
Yes, the LTC2917IMS-B1#TRPBF can monitor a 12V supply using its internal 6.2V shunt regulator on the VCC pin. A series current-limiting resistor (e.g., 11kΩ for 12V) must be placed between the 12V source and VCC to limit input current to ≤5mA. The VM pin then monitors the 12V rail directly, with SEL1/SEL2 configured for "12V" mode (both tied to VCC), and TOL set for desired tolerance - all without external divider resistors. This capability is explicitly supported in the LTC2917IMS-B1#TRPBF datasheet.
What is the minimum supply voltage required for reliable RST assertion on the LTC2917IMS-B1#TRPBF?
The LTC2917IMS-B1#TRPBF guarantees RST assertion for VCC ≥ 0.8V, ensuring valid reset signaling even during deep brown-out conditions. Below 0.8V, RST behavior is unspecified. Once VCC exceeds 1.5V (undervoltage lockout threshold), the internal comparators and timers become fully operational, and VM threshold accuracy is maintained at ±1.5% over temperature. This dual-level guarantee - functional reset at 0.8V and full specification compliance above 1.5V - is a defined characteristic of the LTC2917IMS-B1#TRPBF.
LTC2917IMS-B1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC2917IMS-B1#TRPBF FAQ
1.How can I place an order for LTC2917IMS-B1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917IMS-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 LTC2917IMS-B1#TRPBF reliable?
The price and inventory of LTC2917IMS-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 LTC2917IMS-B1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2917IMS-B1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917IMS-B1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2917IMS-B1#TRPBF?
LTC2917IMS-B1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917IMS-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 LTC2917IMS-B1#TRPBF?
For technical support, including LTC2917IMS-B1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917IMS-B1#TRPBF requirements.
6.How does Aetrix verify that LTC2917IMS-B1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2917IMS-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 LTC2917IMS-B1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2917IMS-B1#TRPBF?
All LTC2917IMS-B1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917IMS-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 LTC2917IMS-B1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2917IMS-B1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2917IMS-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…
