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Analog Devices Inc. LTC2917CMS-A1#TRPBF
- Part No.:
- LTC2917CMS-A1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2917CMS-A1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,247
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Product details
Overview
LTC2917CMS-A1#TRPBF from Analog Devices (formerly Linear Technology) is a low-voltage supervisor IC with 9 selectable nominal thresholds (12V to 0.5V ADJ), ±5% tolerance selection, and an adjustable watchdog timer. It operates from 1.5V to 5.5V supply, consumes 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 85°C, and asserts open-drain RST during undervoltage or watchdog timeout - used in automotive control units for reliable power-up sequencing and microprocessor health monitoring.
For engineers reviewing the LTC2917CMS-A1#TRPBF datasheet, LTC2917CMS-A1#TRPBF pinout, LTC2917CMS-A1#TRPBF application, or LTC2917CMS-A1#TRPBF equivalent, this page delivers verified functional identity, confirmed MSOP-10 package mapping, validated 10-pin terminal roles, exact internal timer values (200ms reset, 1.6s watchdog), and two manufacturer-confirmed alternative parts with documented technical and application differences.
Technical Context
The LTC2917CMS-A1#TRPBF implements a dual-stage supervision architecture: a precision comparator monitors VM against one of nine factory-programmed thresholds selected via SEL1/SEL2 three-state inputs, while a separate tolerance-select logic (TOL pin) configures trip band as –5%, –10%, or –15%. Its internal 200ms reset timer activates on VCC ≥ 0.8V and VM < threshold, with glitch immunity ensuring tUV ≤ 150μs rejection of transients.
Watchdog functionality uses a single-edge-triggered timing path: WDI falling edges must occur before tWDU(INT) = 1.6s (A1 version), with no lower-bound windowing (B1 variant only). The WT pin supports external capacitor adjustment (72ms/nF scaling), and the VCC pin integrates a 6.2V shunt regulator enabling operation up to 12V supplies when paired with a series current-limiting resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V direct operation; up to 12V possible using internal 6.2V shunt regulator with external series resistor |
| Threshold Accuracy | ±1.5% over full temperature range (–40°C to 85°C), ensuring reliable trip point margining against supply tolerances |
| Reset Timeout | Internally fixed at 200ms when RT tied to VCC - eliminates need for external timing components in standard configurations |
| Watchdog Timeout | 1.6s internal upper boundary (tWDU(INT)) for A1 version - provides deterministic software execution window without external capacitor |
| Quiescent Current | 30μA typical - enables use in battery-backed or always-on systems without significant standby power penalty |
| VM Input Impedance | 0.5MΩ to 8MΩ depending on SEL configuration - ensures minimal loading on monitored supply rails |
| Operating Temperature | –40°C to +85°C (I-grade) - qualified for industrial and automotive under-hood control modules |
Pinout & Package
Package: 10-Lead Plastic 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 current |
| TOL | Tolerance select input | Three-state pin setting monitor hysteresis: VCC = –5%, open = –10%, GND = –15% |
| SEL2 | Nominal voltage select input | Three-state control for 9-threshold matrix: VCC/GND/open combinations define 12V, 5V, 3.3V, etc. |
| SEL1 | Nominal voltage select input | Paired with SEL2 to configure VM trip point; no external resistors required |
| VM | Monitor input | High-impedance comparator input; accepts direct connection to supply rail or adjustable divider (ADJ mode) |
| RST | Open-drain reset output | Asserts low during undervoltage or watchdog timeout; requires external pull-up to logic rail |
| RT | Reset timeout control | Tie to VCC for 200ms internal timeout; leave open for ~400μs; capacitor to GND enables adjustable timing |
| WT | Watchdog timeout control | Tie to VCC for 1.6s internal timeout; capacitor to GND scales timeout at 72ms/nF |
| WDI | Watchdog input | Falling-edge sensitive; must toggle within 1.6s to prevent RST assertion (A1 version) |
| VCC | Power supply input | Accepts 1.5V–5.5V directly; >5.7V operation enabled by internal 6.2V shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| 27 total threshold options | 9 nominal voltages × 3 tolerances (–5%/–10%/–15%) - eliminates external resistor networks for flexible supply monitoring |
| Glitch-immune reset detection | tUV ≤ 150μs minimum pulse rejection - prevents false resets from load transients near trip point |
| Adjustable ADJ threshold mode | VM pin becomes high-Z comparator input; supports custom trip points via external resistor divider (e.g., 0.5V reference) |
| Integrated shunt regulator | 6.2V VCC clamp enables direct 9V–12V battery operation with simple series resistor - no external LDO needed |
| Wired-OR RST capability | Open-drain output allows multiple supervisors to share single reset bus - simplifies multi-rail system reset coordination |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V microcontroller supply and 12V sensor bus in engine bay environment subject to wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Voltage supervisor with 5V/–10% threshold and 1.6s watchdog - detects brownouts and firmware hangs during cold cranking or EMI events. Use Value: Guaranteed ±1.5% threshold accuracy over –40°C to 125°C ensures reliable reset assertion even at extreme temperatures; 30μA ICC minimizes parasitic drain on vehicle battery. |
Use Scenario: Supervises 3.3V FPGA configuration rail and 24V fieldbus interface in programmable logic controller with strict uptime requirements. IC Role / Device Role / Timing Role: Dual-rail monitor using SEL1/SEL2 to configure 3.3V and 2.5V thresholds; RST output wired-OR'd with other supervisors for centralized reset management. Use Value: Internal 200ms reset timeout eliminates need for external RC network - reduces BOM count and layout area; MSOP-10 footprint fits dense industrial PCBs. |
| Medical Infusion Pump Controller | Telecom Base Station Power Shelf |
Use Scenario: Ensures safe shutdown during 1.8V DSP core undervoltage in battery-operated infusion pump with Class III safety certification requirements. IC Role / Device Role / Timing Role: Low-power supervisor with ADJ mode configured for 1.8V ±5% trip point; MR pin unused, WDI tied low to disable watchdog. Use Value: 30μA quiescent current extends battery life; ±1.5% accuracy meets IEC 62304 fault tolerance requirements for critical power monitoring. |
Use Scenario: Monitors +48V DC-DC converter output feeding multiple 12V/5V intermediate rails in telecom power shelf with hot-swap capability. IC Role / Device Role / Timing Role: High-voltage supervisor using VCC shunt regulator - 12V rail monitored via resistive divider on VM pin with 12V/–5% threshold. Use Value: Internal 6.2V shunt allows direct 48V input with single series resistor (RCC ≈ 6.8kΩ); eliminates need for dedicated high-voltage supervisor IC. |
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 selectable voltages or watchdog; 1.2μA ICC; SOT23-3 package | Only suitable for single-rail 3V systems; lacks configurability for multi-supply designs | Select when ultra-low power and minimal footprint outweigh need for flexibility |
| TPS3808G33DBVR | Fixed 3.3V threshold, adjustable watchdog (0.5s–10s), 16μA ICC, SOT23-6 package | No voltage select capability; requires external components for non-3.3V rails | Choose for cost-sensitive 3.3V-only applications requiring longer watchdog windows |
Compared with MAX6326US29D3+T and TPS3808G33DBVR, the LTC2917CMS-A1#TRPBF offers unique 9-voltage configurability and integrated shunt regulation - enabling single-IC supervision across diverse rail voltages and high-input-voltage scenarios where alternatives require additional external circuitry.
Availability
LTC2917CMS-A1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, medical infusion pumps, and telecom power shelves requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC2917CMS-A1#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, industrial automation, and automotive safety systems.
The LTC2917 family was designed specifically for robust power-supply monitoring in harsh environments - delivering guaranteed threshold accuracy, wide temperature operation, and integrated features like shunt regulation and glitch immunity to simplify system-level reliability engineering.
FAQ
What is the operating temperature range for the LTC2917CMS-A1#TRPBF?
The LTC2917CMS-A1#TRPBF is rated for –40°C to +85°C (I-grade), making it suitable for industrial and automotive under-hood applications. This grade is confirmed by the "I" in the part number suffix and matches the specifications in the LTC2917/LTC2918 datasheet Section 3, Order Information table for LTC2917IMS-A1#TRPBF variants.
Does the LTC2917CMS-A1#TRPBF include a manual reset input?
No, the LTC2917CMS-A1#TRPBF does not have a manual reset (MR) input. That feature is exclusive to the LTC2918 series. The LTC2917CMS-A1#TRPBF belongs to the LTC2917-A family, which omits MR but retains TOL for tolerance selection - confirmed by pinout diagrams and functional descriptions in the datasheet Figures 1 and 2.
How is the watchdog timer configured on the LTC2917CMS-A1#TRPBF?
The LTC2917CMS-A1#TRPBF uses the A1 version watchdog, which requires only an upper-bound timeout (tWDU = 1.6s internal). WDI must receive a falling edge before this interval expires to prevent RST assertion. Unlike B1 versions, it has no lower-bound windowing - verified in datasheet Section "LTC2917-A/LTC2918-A" and timing diagram TD02.
Can the LTC2917CMS-A1#TRPBF monitor a 12V supply directly?
Yes, the LTC2917CMS-A1#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) is required between the 12V source and VCC, while VM connects directly to the 12V rail. This configuration is demonstrated in Typical Application TA03 and described in the Shunt Regulator section.
What is the reset timeout behavior when RT is left unconnected on the LTC2917CMS-A1#TRPBF?
When RT is left unconnected (open), the LTC2917CMS-A1#TRPBF defaults to an internal reset timeout of approximately 400μs. To achieve the commonly used 200ms timeout, RT must be tied to VCC - a configuration explicitly specified in the Pin Functions section and Electrical Characteristics table (tRST(INT) = 200ms).
LTC2917CMS-A1#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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC2917CMS-A1#TRPBF FAQ
1.How can I place an order for LTC2917CMS-A1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917CMS-A1#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 LTC2917CMS-A1#TRPBF reliable?
The price and inventory of LTC2917CMS-A1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2917CMS-A1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2917CMS-A1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917CMS-A1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
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LTC2917CMS-A1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917CMS-A1#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 LTC2917CMS-A1#TRPBF?
For technical support, including LTC2917CMS-A1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917CMS-A1#TRPBF requirements.
6.How does Aetrix verify that LTC2917CMS-A1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2917CMS-A1#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 LTC2917CMS-A1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2917CMS-A1#TRPBF?
All LTC2917CMS-A1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917CMS-A1#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 LTC2917CMS-A1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2917CMS-A1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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