My Inquiry
My Account
Analog Devices Inc. LTC2917HMS-B1#PBF
- Part No.:
- LTC2917HMS-B1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2917HMS-B1#PBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:100
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2917HMS-B1#PBF from Analog Devices (formerly Linear Technology) is a high-temperature voltage supervisor IC with 9 selectable nominal thresholds (12V to ADJ), ±5%/±10%/±15% tolerance selection, windowed watchdog timer, and operation up to 125°C. It consumes only 30μA quiescent current, supports 1.5V–5.5V supply, and guarantees ±1.5% threshold accuracy over temperature. It is used in automotive control systems requiring robust power-up/power-down reset sequencing and glitch-immune supervision.
For engineers reviewing the LTC2917HMS-B1#PBF datasheet, LTC2917HMS-B1#PBF pinout, LTC2917HMS-B1#PBF application, or LTC2917HMS-B1#PBF equivalent, key selection criteria include its B1 version's windowed watchdog (tWDL = 50ms, tWDU = 1.6s), MSOP-10 package with exposed pad, –40°C to 125°C operating range, and compatibility with 1.8V/2.5V/3.3V/5V/12V rail monitoring without external resistors.
Technical Context
The LTC2917HMS-B1#PBF implements a dual-stage comparator architecture with internal reference division and three-state input decoding for threshold selection (SEL1/SEL2/TOL). Its windowed watchdog logic requires falling edges on WDI within both lower (tWDL) and upper (tWDU) timing boundaries - a reliability enhancement over standard watchdogs.
Reset assertion is guaranteed down to VCC ≥ 0.8V, and the RST output remains low during VCC undervoltage lockout (<1.5V). The device integrates a 6.2V shunt regulator on VCC, enabling direct operation from supplies up to 12V when paired with an external series resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V; operates as shunt regulator above 5.7V (e.g., 12V automotive battery via series resistor) |
| Threshold Accuracy | ±1.5% over –40°C to 125°C; ensures no nuisance resets within supply tolerance bands |
| Quiescent Current | 30μA typical; enables long-term battery-backed or low-power embedded monitoring |
| Watchdog Type | Windowed (B1 version); requires WDI falling edge between tWDL = 50ms and tWDU = 1.6s to prevent false reset |
| Reset Timeout | 200ms internal (RT tied to VCC); adjustable from 400μs (RT open) to 20ms/nF (external CRT) |
| Operating Temp | –40°C to 125°C (H-grade); qualified for under-hood automotive and industrial control environments |
| Package | 10-Lead MSOP (3mm × 3mm) with exposed thermal pad; θJA = 200°C/W, TJMAX = 125°C |
Pinout & Package
10-Lead Plastic MSOP (MS package), 3mm × 3mm body, exposed pad (pin 11) optional GND connection. Pin pitch: 0.5mm.
| 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 |
| TOL (Pin 2) | Tolerance select input | Three-state control for –5% (VCC), –10% (open), or –15% (GND) threshold hysteresis |
| SEL2 (Pin 3) | Nominal voltage select | One of two inputs selecting 9 preset thresholds (e.g., GND + VCC = 1.2V nominal) |
| SEL1 (Pin 4) | Nominal voltage select | Second input for threshold decode; open/VCC/GND combinations define VM trip point |
| VM (Pin 5) | Monitor input | High-impedance (0.5–8MΩ) input for supply rail; compares against selected threshold |
| RST (Pin 6) | Open-drain reset output | Asserts low on fault; requires external pull-up; supports wired-OR with other supervisors |
| RT (Pin 7) | Reset timeout control | Capacitor-to-GND sets tRST (9ms/nF); VCC = 200ms, open = 400μs |
| WT (Pin 8) | Watchdog timeout control | Capacitor-to-GND sets tWDU (72ms/nF); VCC = 1.6s, open = 3.2ms, GND = disabled |
| WDI (Pin 9) | Watchdog input | Falling-edge-triggered (B1); must toggle within tWDL–tWDU window to avoid reset |
| VCC (Pin 10) | Power supply input | 1.5–5.5V direct supply; >5.7V requires series resistor due to integrated 6.2V shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | 9 nominal voltages × 3 tolerances (–5%/–10%/–15%) - eliminates external resistor networks |
| Windowed Watchdog (B1) | Prevents system lockup from stuck or oscillating WDI signals by enforcing both min/max timing bounds |
| Glitch Immunity | Hardware anti-glitch circuitry (tUV ≤ 150μs) prevents false resets from transient noise near threshold |
| Guaranteed RST at Low VCC | RST asserts reliably even when VCC drops to 0.8V - ensures fail-safe behavior during brownout |
| 125°C Operation | H-grade qualification enables deployment in engine control units, transmission modules, and industrial motor drives |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Management |
|---|---|
Use Scenario: Monitoring 5V microcontroller supply in under-hood ECU exposed to thermal cycling and load dump transients. IC Role / Device Role / Timing Role: Voltage supervisor with windowed watchdog ensuring MCU executes boot code and stays responsive; RST holds processor in reset until stable 5V is confirmed. Use Value: Prevents erratic MCU behavior during cold cranking (battery dip to 6V) and hot restarts (125°C ambient) via guaranteed ±1.5% threshold accuracy and 125°C-rated MSOP package. | Use Scenario: Supervising 3.3V I/O rail in programmable logic controller with safety-critical watchdog requirements. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors rail integrity and enforces software liveness via windowed watchdog (tWDL=50ms/tWDU=1.6s). Use Value: Eliminates need for external RC timing components while meeting SIL-2 functional safety timing constraints for reset assertion and watchdog boundary enforcement. |
| Telecom Base Station Power Sequencing | Medical Diagnostic Imaging Subsystem |
Use Scenario: Coordinating power-up of FPGA, ADC, and RF front-end in 4G/5G base station radio unit. IC Role / Device Role / Timing Role: Multi-rail supervisor using SEL1/SEL2 to monitor 12V bias, 3.3V core, and 1.8V interface rails sequentially via daisy-chained RST outputs. Use Value: Reduces BOM count by replacing three discrete supervisors; 30μA quiescent current minimizes standby power in always-on remote units. | Use Scenario: Ensuring reliable startup of X-ray detector ASIC after high-voltage power supply ramp-up. IC Role / Device Role / Timing Role: High-accuracy supervisor verifying 2.5V analog supply stability before enabling detector bias; uses ADJ mode with precision divider for custom 2.45V threshold. Use Value: ±1.5% threshold tolerance over –40°C to 125°C prevents false resets during thermal stabilization phase, improving diagnostic uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6369KA22+T | Fixed 2.2V threshold; no selectable voltages or windowed watchdog; 16-pin TSSOP | Only suitable for single-rail 2.2V monitoring; lacks multi-threshold flexibility and B1-level watchdog reliability | Select only if cost-sensitive design requires fixed threshold and no timing windowing |
| TPS3808G18DBVR | Adjustable threshold via external resistor divider; no windowed watchdog; 6-pin SOT-23 | Requires external resistors for each rail; limited to 85°C operation; no TOL pin for tolerance selection | Choose for space-constrained designs needing basic reset but not automotive-grade temp or windowed timing |
Compared with MAX6369KA22+T and TPS3808G18DBVR, the LTC2917HMS-B1#PBF provides unique integration of 9 factory-programmed thresholds, ±1.5% accuracy across 125°C, and hardware-enforced windowed watchdog - eliminating external components and enabling higher-reliability automotive and industrial deployments.
Availability
LTC2917HMS-B1#PBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, telecom base stations, and medical imaging subsystems requiring stable component supply with guaranteed long-term availability and extended temperature performance.
Supply support for LTC2917HMS-B1#PBF 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 power management and precision monitoring portfolio.
The LTC2917 product line was designed specifically for high-reliability power supervision in harsh environments - delivering guaranteed accuracy, glitch immunity, and extended temperature operation for automotive, industrial, and telecom infrastructure.
FAQ
What is the maximum supply voltage the LTC2917HMS-B1#PBF can tolerate on its VCC pin?
The LTC2917HMS-B1#PBF has an absolute maximum VCC rating of 5.7V for direct connection. However, it integrates a 6.2V shunt regulator, allowing operation from higher voltages (e.g., 12V automotive) when a series current-limiting resistor is used to keep VCC pin current ≤5mA. Without that resistor, exceeding 5.7V risks violating terminal current limits.
How does the windowed watchdog function differ between LTC2917HMS-B1#PBF and LTC2917HMS-A1#PBF?
The LTC2917HMS-B1#PBF implements a true windowed watchdog requiring WDI falling edges to occur strictly between tWDL = 50ms and tWDU = 1.6s. In contrast, the A1 version only enforces the upper boundary (tWDU ≈ 1.6s) and ignores lower-bound violations. This makes the B1 version essential for detecting stuck-high or oscillating WDI signals in safety-critical applications.
Can the LTC2917HMS-B1#PBF monitor a 1.2V supply with ±10% tolerance?
Yes. Configure SEL1 = GND and SEL2 = VCC to select the 1.2V nominal threshold, then set TOL = open to apply –10% tolerance. The resulting trip point is 1.08V (1.2V × 0.9), with guaranteed ±1.5% accuracy over temperature - meaning the actual threshold falls between 1.064V and 1.096V across –40°C to 125°C.
What is the minimum reset timeout achievable with the LTC2917HMS-B1#PBF, and how is it configured?
The minimum reset timeout for the LTC2917HMS-B1#PBF is approximately 400μs, achieved by leaving the RT pin unconnected (open). This configuration uses an internal timer and requires no external capacitor. For longer timeouts, connect RT to VCC (200ms) or add a capacitor to ground (9ms/nF scaling).
Does the LTC2917HMS-B1#PBF support manual reset functionality?
No. Manual reset (MR pin) is exclusive to the LTC2918 family. The LTC2917HMS-B1#PBF is the supervisor-only variant without MR. If manual reset is required, the functional alternative is LTC2918HMS-B1#PBF, which shares identical threshold, watchdog, and temperature specifications but adds the MR input with internal 100kΩ pull-up.
LTC2917HMS-B1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC2917HMS-B1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917HMS-B1#PBF 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#PBF reliable?
The price and inventory of LTC2917HMS-B1#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC2917HMS-B1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917HMS-B1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2917HMS-B1#PBF?
LTC2917HMS-B1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917HMS-B1#PBF 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#PBF?
For technical support, including LTC2917HMS-B1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917HMS-B1#PBF requirements.
6.How does Aetrix verify that LTC2917HMS-B1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2917HMS-B1#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC2917HMS-B1#PBF?
All LTC2917HMS-B1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917HMS-B1#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC2917HMS-B1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2917HMS-B1#PBF 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…
