My Inquiry
My Account
Analog Devices Inc. LTC2917HMS-B1#TRPBF
- Part No.:
- LTC2917HMS-B1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2917HMS-B1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,526
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2917HMS-B1#TRPBF from Analog Devices (formerly Linear Technology) is a high-temperature voltage supervisor IC with 27 selectable reset thresholds, windowed watchdog timer, and manual reset disable (LTC2917 variant). It operates from 1.5V to 5.5V supply, consumes 30μA typical quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 125°C, and supports 12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1V, and adjustable (0.5V) monitoring - used in automotive engine control units for reliable power-on reset and fault detection.
For engineers reviewing the LTC2917HMS-B1#TRPBF datasheet, LTC2917HMS-B1#TRPBF pinout, LTC2917HMS-B1#TRPBF application, or LTC2917HMS-B1#TRPBF equivalent, key selection criteria include its B1 version's windowed watchdog (tWDL = 50ms min, tWDU = 1.6s typ), 10-lead MSOP package rated to 125°C, tolerance-selectable thresholds (–5%/–10%/–15%), and guaranteed RST assertion down to VCC ≥ 0.8V.
Technical Context
The LTC2917HMS-B1#TRPBF implements a dual-stage comparator architecture with internal reference division and three-state input decoding (SEL1/SEL2/TOL) to select among nine nominal voltages and three tolerances - yielding 27 discrete threshold combinations. Its windowed watchdog logic requires falling edges on WDI strictly between tWDL (50ms) and tWDU (1.6s) to avoid reset assertion.
It integrates a 6.2V shunt regulator on VCC for operation up to 12V supplies (with external series resistor), features glitch-immune reset timing (tUV = 10–150μs), and provides open-drain RST output with VOL ≤ 0.2V at 15μA load and VCC = 0.8V - enabling wired-OR system-level reset coordination across multiple supervisors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V direct; up to 12V via internal 6.2V shunt regulator + external series resistor |
| Operating Temp | –40°C to +125°C (H-grade), qualified for under-hood automotive use |
| Threshold Accuracy | ±1.5% over full temperature range - ensures no nuisance resets within supply tolerance bands |
| Quiescent Current | 30μA typical - enables always-on monitoring in battery-backed systems |
| Reset Timeout | 200ms internal (RT tied to VCC); adjustable from 400μs (RT open) to 20ms/nF (external CRT) |
| Watchdog Type | Windowed (B1 version): requires WDI falling edge between 50ms and 1.6s - prevents both stuck-high and too-fast toggling |
| RST Output | Open-drain, guaranteed active down to VCC = 0.8V - supports brownout detection before logic power stabilizes |
Pinout & Package
Package: 10-lead MSOP (3mm × 3mm), exposed pad optional, θJA = 200°C/W, rated for 125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground Reference | Primary return path for all internal circuits and RST pull-down; must be low-impedance connection |
| TOL (Pin 2) | Tolerance Select Input | Three-state control (VCC/GND/open) sets –5%, –10%, or –15% trip band - unique to LTC2917 family |
| SEL2 (Pin 3) | Nominal Threshold Select | Three-state input (VCC/GND/open) - combined with SEL1, selects one of nine voltage thresholds |
| SEL1 (Pin 4) | Nominal Threshold Select | Three-state input (VCC/GND/open) - defines VM trip point with SEL2 and TOL |
| VM (Pin 5) | Monitor Input | High-impedance (0.5–8MΩ) input for supply voltage sensing; ADJ mode accepts 0.5V reference directly |
| RST (Pin 6) | Reset Output | Open-drain output asserted low during undervoltage or watchdog timeout; requires external pull-up |
| RT (Pin 7) | Reset Timeout Control | Capacitor-connected pin sets reset duration (9ms/nF); tied to VCC = 200ms, open = 400μs |
| WT (Pin 8) | Watchdog Timeout Control | Capacitor-connected pin sets watchdog upper bound (72ms/nF); tied to VCC = 1.6s, open = 3.2ms |
| WDI (Pin 9) | Watchdog Input | Falling-edge-triggered input for windowed watchdog; only falling edges counted in B1 version |
| VCC (Pin 10) | Power Supply Input | Accepts 1.5–5.5V directly; >5.7V requires series resistor due to integrated 6.2V shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | Nine nominal voltages × three tolerances (–5%/–10%/–15%) - eliminates external resistor networks for flexible supply monitoring |
| Windowed Watchdog (B1) | Enforces minimum (50ms) and maximum (1.6s) WDI toggle period - prevents firmware lockup and spurious resets |
| Guaranteed Operation to 125°C | H-grade qualification ensures reliability in engine control, transmission, and ADAS modules without derating |
| Glitch Immunity | 10–150μs minimum glitch duration required to trigger RST - rejects noise and transients near threshold |
| Low-VCC Reset Assertion | RST asserts reliably even when VCC drops to 0.8V - enables early brownout detection before digital logic fails |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 5V microcontroller supply and 12V sensor rail in under-hood ECU with ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset, brownout detection, and windowed watchdog supervision of MCU firmware execution. Use Value: Prevents system hang from corrupted code by enforcing strict WDI timing windows (50ms–1.6s), while ±1.5% threshold accuracy avoids false resets during normal 5V±10% operation. | Use Scenario: Coordinating startup sequence of FPGA, DSP, and analog front-end in modular industrial controller with multi-rail power supply. IC Role / Device Role / Timing Role: Multi-threshold supervisor asserting RST until all rails (3.3V, 2.5V, 1.8V) stabilize, then enabling watchdog for runtime integrity check. Use Value: Eliminates need for discrete resistor dividers per rail; single LTC2917HMS-B1#TRPBF monitors up to nine supplies via SEL1/SEL2 reconfiguration during commissioning. |
| Medical Imaging Power Management | Avionics Sensor Interface Module |
Use Scenario: Ensuring clean power-up of high-resolution ADC and FPGA in portable ultrasound device with battery backup. IC Role / Device Role / Timing Role: Low-quiescent-current (30μA) supervisor maintaining vigilance during standby, triggering reset if 1.8V core rail dips below 1.62V (–10% tolerance). Use Value: Extends battery life via ultra-low ICC; ±1.5% accuracy guarantees reset occurs only outside 1.8V±10% spec - critical for diagnostic data integrity. | Use Scenario: Supervising 28V aircraft bus-derived 3.3V and 5V supplies in inertial measurement unit (IMU) operating at –40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability supervisor using windowed watchdog to detect flight-critical software stalls, with reset timeout configured for deterministic recovery. Use Value: H-grade rating ensures operation across full avionics thermal envelope; 6.2V shunt regulator allows direct 28V input conditioning without external LDO. |
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; 3-pin SOT23 package | Single-rail monitoring only; no windowed watchdog or multi-supply flexibility | Select when only basic 2.93V reset is needed and board space is constrained |
| TPS3808G18DBVR | Fixed 1.8V threshold, adjustable watchdog (non-windowed), 6-pin SOT23 | Lacks tolerance selection, selectable thresholds, and 125°C rating; lower ICC (1.1μA) | Prefer for ultra-low-power battery applications where only 1.8V monitoring is required |
Compared with MAX6326US29D3+T and TPS3808G18DBVR, the LTC2917HMS-B1#TRPBF offers uniquely configurable thresholds, true windowed watchdog, and automotive-grade temperature range - making it irreplaceable for multi-rail, safety-critical, or thermally demanding designs.
Availability
LTC2917HMS-B1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, medical imaging equipment, and avionics sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2917HMS-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, serving industrial, automotive, communications, and healthcare markets.
The LTC2917 product line was developed by Linear Technology (acquired by ADI in 2017) specifically for high-reliability power monitoring in harsh environments - emphasizing precision threshold accuracy, wide temperature operation, and robust watchdog functionality for mission-critical systems.
FAQ
What is the function of the TOL pin on the LTC2917HMS-B1#TRPBF?
The TOL pin on the LTC2917HMS-B1#TRPBF is a three-state input (VCC/GND/open) that selects the tolerance band for the monitored supply: –5% when tied to VCC, –10% when left open, and –15% when tied to GND. This feature is exclusive to the LTC2917 family and enables precise margining without external components. The LTC2917HMS-B1#TRPBF uses this pin to define the hysteresis window around each of its nine nominal thresholds.
Does the LTC2917HMS-B1#TRPBF support windowed watchdog functionality?
Yes, the LTC2917HMS-B1#TRPBF implements a true windowed watchdog timer as indicated by its "B1" suffix. It requires falling edges on the WDI pin to occur strictly between the lower boundary (tWDL = 50ms min) and upper boundary (tWDU = 1.6s typ) - rejecting both too-slow and too-fast toggling. This behavior is confirmed in the datasheet's timing diagrams and Applications Information section for B versions.
What is the minimum VCC voltage required for the LTC2917HMS-B1#TRPBF to assert a valid RST output?
The LTC2917HMS-B1#TRPBF guarantees RST assertion for VCC ≥ 0.8V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Below this level, internal circuitry may not operate reliably. This low-voltage capability enables early brownout detection before downstream logic fails - a key design advantage of the LTC2917HMS-B1#TRPBF in safety-critical systems.
Can the LTC2917HMS-B1#TRPBF monitor a 12V supply directly?
Yes, the LTC2917HMS-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 input) 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 threshold selected via SEL1/SEL2 = VCC/VCC for 12V, –5% tolerance (TOL = VCC). This configuration is validated in the Typical Application TA03.
What package type and thermal performance does the LTC2917HMS-B1#TRPBF use?
The LTC2917HMS-B1#TRPBF uses a 10-lead MSOP package (3mm × 3mm) with θJA = 200°C/W. Its H-grade rating guarantees operation from –40°C to +125°C junction temperature, and the exposed pad (though optional) improves thermal dissipation. This package meets automotive AEC-Q200 requirements when mounted per Linear Technology's layout guidelines - a critical specification for the LTC2917HMS-B1#TRPBF in under-hood applications.
LTC2917HMS-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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC2917HMS-B1#TRPBF FAQ
1.How can I place an order for LTC2917HMS-B1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917HMS-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 LTC2917HMS-B1#TRPBF reliable?
The price and inventory of LTC2917HMS-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 LTC2917HMS-B1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2917HMS-B1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917HMS-B1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2917HMS-B1#TRPBF?
LTC2917HMS-B1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917HMS-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 LTC2917HMS-B1#TRPBF?
For technical support, including LTC2917HMS-B1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917HMS-B1#TRPBF requirements.
6.How does Aetrix verify that LTC2917HMS-B1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2917HMS-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 LTC2917HMS-B1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2917HMS-B1#TRPBF?
All LTC2917HMS-B1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917HMS-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 LTC2917HMS-B1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2917HMS-B1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2917HMS-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…
