My Inquiry
My Account
Analog Devices Inc. LTC2919HMS-3.3#TRPBF
- Part No.:
- LTC2919HMS-3.3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2919HMS-3.3#TRPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,746
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2919HMS-3.3#TRPBF from Analog Devices is a precision triple-input UV/OV monitor IC for high-reliability power supply supervision in automotive and industrial systems. It features two 0.5V adjustable inputs with ±1.5% threshold accuracy over –40°C to +125°C, a fixed 3.3V VCC UVLO input (2.871V–2.970V), open-drain RST/OUT1/OUT2 outputs, and internal 200ms reset timeout - used to validate 3.3V logic rails during cold-crank or brownout conditions.
For engineers reviewing the LTC2919HMS-3.3#TRPBF datasheet, LTC2919HMS-3.3#TRPBF pinout, LTC2919HMS-3.3#TRPBF application, or LTC2919HMS-3.3#TRPBF equivalent, this page delivers verified specifications, polarity-selectable dual-input monitoring architecture, glitch-filtered timing behavior, and automotive-grade thermal performance validated per AEC-Q100 H-grade requirements.
Technical Context
The LTC2919HMS-3.3#TRPBF implements a dual-comparator architecture with three-state SEL pin control enabling positive/negative polarity selection per ADJ input - allowing independent UV/OV detection on mixed-polarity supplies. Its buffered 1.000V reference (±10mV over temperature) serves as offset for negative-rail monitoring circuits.
Reset assertion is governed by synchronized validity checks across both ADJ inputs and VCC UVLO, followed by a configurable timeout (internal 200ms, external capacitor, or disabled). Propagation delay is 50–800µs depending on overdrive, and outputs guarantee VOL ≤0.15V at VCC = 0.5V - ensuring deterministic low-state behavior during ultra-low-voltage power-up sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 2.871V to 2.970V - precisely monitors 3.3V rail for –10% undervoltage (e.g., automotive cold-crank down to 2.9V) |
| ADJ Input Threshold | 492.5mV to 507.5mV - enables accurate 0.5V trip point for resistor-divider-based UV/OV detection |
| Threshold Accuracy | ±1.5% over –40°C to +125°C - eliminates need for calibration in harsh-temperature environments |
| Quiescent Current | 50µA typical, 280µA max - supports always-on monitoring in battery-backed or low-power systems |
| Reset Timeout | 200ms internal (TMR = GND) - provides standardized hold-off period before releasing RST after full supply validation |
| Output Type | Open-drain RST/OUT1/OUT2 - allows level-shifting, wired-OR logic, and pull-up to higher voltage than VCC |
| Reference Output | 1.000V ±10mV buffered REF - drives up to 1mA load; used to bias negative-supply comparators without external op-amps |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad optional, rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (Pin 1) | Three-state polarity select | Determines ADJ1/ADJ2 polarity: VCC = both positive, OPEN = ADJ1+, ADJ2–, GND = both negative - no external components needed |
| VCC (Pin 2) | Supply input / shunt-regulated rail | Accepts 0.5V–6V directly; internal 6.5V shunt enables >6V operation with series resistor - also functions as third UVLO monitor |
| OUT1 (Pin 3) | Adjustable input 1 status output | Asserts low when ADJ1 is invalid (UV/OV per SEL setting); requires external pull-up; compatible with 3.3V/5V logic families |
| OUT2 (Pin 4) | Adjustable input 2 status output | Asserts low when ADJ2 is invalid; independent of OUT1 - enables discrete fault isolation in multi-rail systems |
| RST (Pin 5) | Master reset output | Inverted open-drain output held low until both ADJ inputs AND VCC are valid for full timeout period - ensures system-wide power integrity |
| GND (Pin 6) | Signal ground reference | Primary return path for all analog and digital circuitry; exposed pad (DFN only) may be tied to GND for improved thermal performance |
| REF (Pin 7) | Buffered 1V reference | Stable 1.000V output with ±10mV tolerance; sources/sinks ±1mA; used to offset ADJ inputs for negative-supply monitoring |
| TMR (Pin 8) | Reset timeout configuration | GND = 200ms internal timeout; open = ~400µs min; VCC = comparator mode (no timeout); capacitor to GND sets custom timeout (9ms/nF) |
| ADJ2 (Pin 9) | Adjustable input 2 | 0.5V nominal threshold comparator input; polarity set by SEL; tie to GND if unused (with SEL = GND or OPEN) |
| ADJ1 (Pin 10) | Adjustable input 1 | 0.5V nominal threshold comparator input; polarity set by SEL; tie to REF if unused (with SEL = VCC or OPEN) |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable dual inputs | Single SEL pin configures ADJ1/ADJ2 for (+)UV/(–)OV, (–)UV/(+)OV, or dual (+)UV - eliminates need for external logic or multiple supervisors |
| Automotive-grade temperature range | Specified from –40°C to +125°C with guaranteed performance - meets AEC-Q100 H-grade requirements for under-hood and chassis applications |
| Ultra-low quiescent current | 50µA typical ICC enables continuous monitoring in always-on domains without compromising battery life in 12V/24V systems |
| Glitch-immune timing architecture | Combined propagation delay filtering (50–800µs) and programmable reset timeout prevent false resets from load transients or EMI-induced supply noise |
| Low-voltage output drive | Guaranteed VOL ≤0.15V at VCC = 0.5V - ensures reliable reset assertion even during deep brownout or slow ramp-up of 3.3V domain |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 3.3V microcontroller core rail and 12V sensor supply during engine start-stop cycles with voltage dips below 6V. IC Role / Device Role / Timing Role: LTC2919HMS-3.3#TRPBF acts as primary supervisor: VCC pin monitors 3.3V rail via built-in UVLO, ADJ1 monitors 12V via resistor divider, SEL = VCC configures both for positive UV detection. Use Value: Internal 200ms timeout prevents spurious MCU resets during <100ms cranking dips; ±1.5% accuracy ensures reliable detection at 2.87V - meeting ISO 16750-2 Pulse 4 requirement. |
Use Scenario: Validating dual 24V DC inputs and isolated 3.3V logic supply in modular I/O backplane with hot-swap capability. IC Role / Device Role / Timing Role: LTC2919HMS-3.3#TRPBF supervises 24V_1 (ADJ1), 24V_2 (ADJ2), and 3.3V (VCC UVLO); SEL = OPEN configures ADJ1+ / ADJ2– to detect 24V UV and –24V OV simultaneously. Use Value: Buffered 1V REF offsets ADJ2 for negative-rail monitoring without external amplifiers; open-drain outputs enable wired-OR fault signaling across distributed modules. |
| Telecom Base Station PSU | Medical Imaging Power Management |
Use Scenario: Supervising redundant +48V DC-DC outputs and auxiliary 3.3V FPGA rail in carrier-grade power system with strict fault logging. IC Role / Device Role / Timing Role: LTC2919HMS-3.3#TRPBF uses ADJ1 for +48V UV/OV (via resistor divider), ADJ2 for +48V reverse-polarity OV (SEL = GND), and VCC for 3.3V UVLO - generating independent OUT1/OUT2 and combined RST. Use Value: Three-state SEL eliminates need for external multiplexers; ±1.5% threshold accuracy over temperature ensures consistent trip points across 0–70°C ambient range in fan-cooled enclosures. |
Use Scenario: Ensuring clean power-up sequence for radiation-hardened FPGA and analog front-end ASIC powered from isolated 3.3V/±15V supplies. IC Role / Device Role / Timing Role: LTC2919HMS-3.3#TRPBF monitors 3.3V (VCC UVLO), +15V (ADJ1), and –15V (ADJ2); SEL = OPEN sets ADJ1+ / ADJ2– to detect +15V UV and –15V OV concurrently. Use Value: REF output biases ADJ2 for precise –15V monitoring; low 50µA ICC minimizes self-heating in thermally constrained CT/MRI subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single 3.3V UVLO with 200ms fixed timeout; no adjustable inputs or polarity selection; 1.6µA IQ | Only monitors VCC rail - cannot supervise dual or negative supplies; lacks REF output and SEL flexibility | Select when only basic 3.3V UVLO is required and space/power budget is extremely constrained |
| MAX6326LT33D2T | 3.3V UVLO with 1.125V threshold (±2.5% acc.), push-pull RST, no ADJ inputs or REF output; –40°C to +125°C | No dual-input capability or negative-rail support; fixed threshold limits adaptability to varying supply tolerances | Choose for simple drop-in replacement where only VCC supervision is needed and push-pull RST is preferred |
Compared with TPS3808G33DBVR and MAX6326LT33D2T, the LTC2919HMS-3.3#TRPBF provides unique dual adjustable inputs with polarity selection, buffered 1V reference, and true triple-monitoring capability - making it irreplaceable in systems requiring coordinated validation of mixed-polarity or multi-rail supplies.
Availability
LTC2919HMS-3.3#TRPBF is available at Aetrix Electronics and suitable for automotive ECU power supervision, industrial PLC sequencing, telecom base station PSUs, and medical imaging subsystems requiring stable component supply across extended temperature ranges.
Supply support for LTC2919HMS-3.3#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2919 product line delivers precision, low-power, multi-rail voltage supervision ICs designed specifically for mission-critical power integrity in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the operating temperature range for the LTC2919HMS-3.3#TRPBF?
The LTC2919HMS-3.3#TRPBF is qualified for operation from –40°C to +125°C and is AEC-Q100 H-grade certified. This rating is explicitly confirmed in the Order Information table and Electrical Characteristics section, where H-grade devices are defined with that exact temperature range and tested accordingly.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on the LTC2919HMS-3.3#TRPBF?
The SEL pin on the LTC2919HMS-3.3#TRPBF selects polarity via three states: tied to VCC configures both ADJ1 and ADJ2 for positive polarity (UV detection), left open configures ADJ1+ and ADJ2–, and tied to GND configures both for negative polarity (OV detection). This mapping is defined in Table 1 of the datasheet and requires no external components.
Can the LTC2919HMS-3.3#TRPBF monitor negative voltages, and if so, how?
Yes - the LTC2919HMS-3.3#TRPBF monitors negative voltages using its buffered 1.000V REF output as an offset. When SEL = GND or OPEN, ADJ2 operates in negative polarity mode; applying a resistive divider from the negative rail to REF sets the trip point relative to ground, enabling precise –UV or +OV detection without external op-amps.
What is the guaranteed low-level voltage (VOL) of the RST output on the LTC2919HMS-3.3#TRPBF at low VCC?
The LTC2919HMS-3.3#TRPBF guarantees RST VOL ≤0.15V at VCC = 0.5V and sink current ≤2500µA, as specified in the Electrical Characteristics table under "VOL Output Voltage Low". This ensures deterministic reset assertion during ultra-low-voltage power-up sequences common in automotive cold-crank scenarios.
Does the LTC2919HMS-3.3#TRPBF include internal hysteresis on its voltage thresholds?
No - the LTC2919HMS-3.3#TRPBF has no built-in hysteresis on its ADJ or VCC UVLO thresholds except in comparator mode (TMR = VCC). The datasheet explicitly states hysteresis is absent in normal operation to preserve ±1.5% threshold accuracy; external RC filtering or comparator-mode operation is required if hysteresis is needed.
LTC2919HMS-3.3#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:
- 3
- Voltage - Threshold:
- 2.921V, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC2919HMS-3.3#TRPBF FAQ
1.How can I place an order for LTC2919HMS-3.3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919HMS-3.3#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 LTC2919HMS-3.3#TRPBF reliable?
The price and inventory of LTC2919HMS-3.3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2919HMS-3.3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2919HMS-3.3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919HMS-3.3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919HMS-3.3#TRPBF?
LTC2919HMS-3.3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919HMS-3.3#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 LTC2919HMS-3.3#TRPBF?
For technical support, including LTC2919HMS-3.3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919HMS-3.3#TRPBF requirements.
6.How does Aetrix verify that LTC2919HMS-3.3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919HMS-3.3#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 LTC2919HMS-3.3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2919HMS-3.3#TRPBF?
All LTC2919HMS-3.3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919HMS-3.3#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 LTC2919HMS-3.3#TRPBF part is unused and in its original packaging.
Return procedure for LTC2919HMS-3.3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2919HMS-3.3#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…
