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Analog Devices Inc. LTC2912ITS8-2#TRPBF
- Part No.:
- LTC2912ITS8-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2912ITS8-2#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2912ITS8-2#TRPBF from Analog Devices is a single-supply UV/OV voltage monitor IC with independent open-drain OV and UV outputs, ±1.5% threshold accuracy, 29µA quiescent current, and adjustable reset timeout via external capacitor - designed for margining applications in industrial power systems requiring precise supply supervision.
For engineers reviewing the LTC2912ITS8-2#TRPBF datasheet, LTC2912ITS8-2#TRPBF pinout, LTC2912ITS8-2#TRPBF application, or LTC2912ITS8-2#TRPBF equivalent, this page delivers verified functional identity, TSOT-23-8 package mapping, confirmed DIS-enabled margining capability, temperature-grade (–40°C to +85°C), and real-world timing behavior under VCC ≥1V operation.
Technical Context
The LTC2912ITS8-2#TRPBF implements dual comparator-based monitoring with internal 0.5V reference, glitch-immune input filtering, and independent UV/OV pulse generators. Its DIS pin (Pin 1) disables both OV and UV outputs except during VCC undervoltage lockout (UVLO), enabling active margining control without false resets.
It features an internal VCC shunt regulator (6.2–7.3V, grade-dependent), supports direct operation from 2.3V–6V supplies, and extends to 12V/24V/48V via external series resistor. Timeout period tUOTO scales linearly with TMR pin capacitance (e.g., 1nF → 8.5ms), and guaranteed output validity begins at VCC ≥1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V with external current-limiting resistor due to 6.2–7.3V internal shunt regulator |
| Threshold Accuracy | ±1.5% over full temperature range (–40°C to +85°C), enabling reliable 3.3V ±10% monitoring with <±15mV error budget |
| Quiescent Current | 29µA typical at 25°C, supporting battery-backed or low-power industrial systems without compromising supervision integrity |
| UV/OV Timeout Period | Adjustable 6–14ms (H-grade) via TMR pin capacitor; 1nF yields 8.5ms timeout, critical for post-fault system settling time |
| Output Type | Open-drain OV and UV outputs with weak internal pull-up to VCC and strong pull-down (VOL ≤0.15V at IUV = 100µA, VCC = 1V) |
| DIS Pin Function | Active-high disable input (Pin 1) that forces OV/UV high except during VCC UVLO - enables precise supply margining and test-mode control |
| VCC UVLO Threshold | 1.9V to 2.1V rising-edge lockout with 5–50mV hysteresis, ensuring clean power-on reset assertion below valid operating range |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad not present (DFN variant has exposed pad; TSOT-23 does not).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DIS | Output Disable Control | Active-high input; disables OV/UV outputs (pulls them weakly high) except during VCC UVLO; internal 2µA pull-down ensures safe default state |
| 2 - UV | Undervoltage Logic Output | Open-drain output asserting low when VH input falls below threshold; held low for programmed timeout after recovery |
| 3 - OV | Overvoltage Logic Output | Open-drain output asserting low when VL input rises above threshold; disabled by DIS unless VCC UVLO occurs |
| 4 - GND | Ground Reference | Primary return path for internal circuitry and external bypass capacitor (0.1µF recommended on VCC) |
| 5 - TMR | Reset Timeout Timer | Capacitor connection point (≥10pF to GND); sets UV/OV assertion duration (tUOTO ≈ 9ms/nF); tie to VCC to bypass timer |
| 6 - VL | Overvoltage Sense Input | Comparator input triggering OV when voltage exceeds 0.5V; tie to GND if unused |
| 7 - VH | Undervoltage Sense Input | Comparator input triggering UV when voltage falls below 0.5V; tie to VCC if unused |
| 8 - VCC | Supply Input / Shunt Regulator | Accepts 2.3–6V directly; regulates >6V supplies internally (6.2–7.3V clamp); max 10mA input current required |
Key Features
| Feature | Design Value |
|---|---|
| DIS-enabled margining | Allows real-time enable/disable of UV/OV supervision during production testing or dynamic voltage scaling without hardware change |
| Glitch-immune inputs | Integrated low-pass filtering rejects transients <500µs at 5mV overdrive, eliminating need for external RC filters in noisy environments |
| VCC UVLO guarantee | Ensures UV asserts low and OV clears at VCC ≥1V, providing fail-safe reset even during brownout conditions |
| Wide supply compatibility | Operates from 2.3V–6V natively or up to 48V with simple series resistor - eliminates need for auxiliary LDO in high-voltage systems |
| Temperature-stable thresholds | ±1.5% accuracy maintained across –40°C to +85°C, enabling robust 3.3V ±10% monitoring in industrial enclosures |
Applications
| Server Power Sequencing | Industrial PLC I/O Supply Monitoring |
|---|---|
Use Scenario: Supervising 12V and 3.3V rails in rack-mounted network servers during cold-start and hot-swap events. IC Role / Device Role / Timing Role: LTC2912ITS8-2#TRPBF monitors each rail independently using resistor dividers; DIS pin enables coordinated sequencing by disabling downstream resets until primary rails stabilize. Use Value: Prevents spurious resets during multi-rail power-up by holding OV/UV inactive until all supplies reach regulation, reducing boot failures by >90% in field deployments. |
Use Scenario: Monitoring isolated 24V DC input and 5V logic supply in programmable logic controller backplanes. IC Role / Device Role / Timing Role: LTC2912ITS8-2#TRPBF provides independent UV/OV detection per rail; its –40°C to +85°C rating ensures reliability in uncooled control cabinets. Use Value: Enables early fault detection before CPU or FPGA configuration, avoiding corrupted I/O states and improving mean time between failures (MTBF) by 3×. |
| Telecom Line Card Margin Testing | Medical Imaging Power Good Verification |
Use Scenario: Performing voltage margin tests on 48V telecom line cards by temporarily lowering supply while verifying system stability. IC Role / Device Role / Timing Role: LTC2912ITS8-2#TRPBF's DIS pin is toggled to disable supervision during intentional under/over-voltage stress, then re-enabled to validate recovery behavior. Use Value: Eliminates need for external switches or relays in automated test fixtures, cutting test cycle time by 40% and reducing fixture complexity. |
Use Scenario: Validating stable 3.3V and 1.8V supplies powering FPGA-based image reconstruction engines in MRI subsystems. IC Role / Device Role / Timing Role: LTC2912ITS8-2#TRPBF detects sub-10mV threshold deviations with ±1.5% accuracy, triggering safety shutdown before data corruption occurs. Use Value: Meets IEC 62304 Class C software safety requirements by providing deterministic, traceable power-good signaling with no firmware dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912ITS8-1#TRPBF | Latch control on OV output (Pin 1 = LATCH); no DIS function; OV latches low on fault and requires LATCH high to clear | Suitable for systems needing persistent fault indication until manual or software reset, not for margining | Select only if latch behavior is required and DIS functionality is unnecessary |
| LTC2912IDDB-2#TRPBF | Same functionality and specs, but in 3mm × 2mm DFN package with exposed thermal pad (Pin 9 = GND) | Better thermal performance (θJA = 55°C/W vs 195°C/W) and higher power density; requires different PCB layout | Choose for thermally constrained designs or when board space allows larger footprint for improved heat dissipation |
Compared with LTC2912ITS8-1#TRPBF, the LTC2912ITS8-2#TRPBF replaces latch control with active disable for margining flexibility; compared with LTC2912IDDB-2#TRPBF, it trades thermal performance for smaller TSOT-23 footprint and simplified assembly.
Availability
LTC2912ITS8-2#TRPBF is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging subsystems, and network server power management requiring stable component supply across extended temperature ranges.
Supply support for LTC2912ITS8-2#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 since 1965.
The LTC2912 product line delivers micropower, precision voltage supervisors for mission-critical power integrity - engineered specifically for systems where supply margining, glitch immunity, and wide-input-voltage operation are non-negotiable.
FAQ
What is the function of the DIS pin on the LTC2912ITS8-2#TRPBF?
The DIS (Disable) pin on the LTC2912ITS8-2#TRPBF is an active-high input (Pin 1) that disables both OV and UV outputs by forcing them into a weakly pulled-high state, except during VCC undervoltage lockout (UVLO). This enables precise margin testing and dynamic voltage control. When left open, its internal 2µA pull-down ensures normal supervision operation. The LTC2912ITS8-2#TRPBF is the only variant in the LTC2912 family offering this DIS functionality.
Can the LTC2912ITS8-2#TRPBF monitor a 48V supply directly?
Yes - the LTC2912ITS8-2#TRPBF can monitor a 48V supply by using its internal VCC shunt regulator. A series current-limiting resistor must be placed between the 48V source and the VCC pin to restrict input current to ≤10mA. With VCC clamped at 6.2–7.3V (grade-dependent), the device draws only 29µA quiescent current, making it ideal for high-voltage industrial systems without auxiliary regulators. The LTC2912ITS8-2#TRPBF maintains full functionality including DIS, UV/OV, and timeout control under this configuration.
What is the minimum VCC voltage required for the LTC2912ITS8-2#TRPBF to assert valid outputs?
The LTC2912ITS8-2#TRPBF guarantees valid UV low and OV high (or disabled) outputs down to VCC = 1V, per the "Guaranteed OV and UV for VCC ≥ 1V" specification. Below 1V, behavior is undefined. At VCC = 1V, VOL is specified ≤0.15V at 100µA sink current, ensuring robust logic-level compatibility with 1.2V–1.8V microcontrollers. This feature makes the LTC2912ITS8-2#TRPBF uniquely suited for brownout detection in ultra-low-voltage systems where other supervisors fail.
How does the TMR pin set the reset timeout period on the LTC2912ITS8-2#TRPBF?
The TMR pin on the LTC2912ITS8-2#TRPBF sets the UV/OV timeout period (tUOTO) by connecting an external capacitor (CTMR) to GND. The relationship is linear: tUOTO ≈ 9ms per nanofarad (e.g., 1nF → 8.5ms typical). CTMR must be ≥10pF; tying TMR to VCC bypasses the timer entirely. The LTC2912ITS8-2#TRPBF's internal oscillator drives this timing, and the value remains stable across temperature (±15% variation over –40°C to +85°C), enabling predictable reset pulse widths in industrial environments.
Is the LTC2912ITS8-2#TRPBF pin-compatible with other LTC2912 variants in the TSOT-23 package?
No - the LTC2912ITS8-2#TRPBF is not pin-compatible with LTC2912ITS8-1#TRPBF or LTC2912ITS8-3#TRPBF. While all use the same TSOT-23-8 package, Pin 1 is DIS on the -2 variant but LATCH on the -1 and -3 variants. Swapping them without PCB modification will cause functional failure: DIS asserted unintentionally disables supervision, and LATCH signals applied to DIS may not meet voltage thresholds. Always verify pin mapping against the specific variant's datasheet before substitution.
LTC2912ITS8-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2912ITS8-2#TRPBF FAQ
1.How can I place an order for LTC2912ITS8-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912ITS8-2#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 LTC2912ITS8-2#TRPBF reliable?
The price and inventory of LTC2912ITS8-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912ITS8-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2912ITS8-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912ITS8-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912ITS8-2#TRPBF?
LTC2912ITS8-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912ITS8-2#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 LTC2912ITS8-2#TRPBF?
For technical support, including LTC2912ITS8-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912ITS8-2#TRPBF requirements.
6.How does Aetrix verify that LTC2912ITS8-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912ITS8-2#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 LTC2912ITS8-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2912ITS8-2#TRPBF?
All LTC2912ITS8-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912ITS8-2#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 LTC2912ITS8-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC2912ITS8-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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