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Analog Devices Inc. LTC2933IDHD#PBF
- Part No.:
- LTC2933IDHD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2933IDHD#PBF.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
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Product details
Overview
LTC2933IDHD#PBF from Analog Devices is a programmable hex voltage supervisor IC with EEPROM configuration, supervising up to six independent power rails (V1–V6) via I²C-programmable UV/OV thresholds, ±1% threshold accuracy over temperature, and three configurable GPIOs for fault signaling or system control in high-availability server and telecom power management.
For engineers reviewing the LTC2933IDHD#PBF datasheet, LTC2933IDHD#PBF pinout, LTC2933IDHD#PBF application, or LTC2933IDHD#PBF equivalent, key selection factors include guaranteed ±1% threshold accuracy across –40°C to +85°C, 256 programmable thresholds per channel, internal 3.3V regulator (VDD33), and DFN-16 (5mm × 4mm) package with exposed pad for thermal performance.
Technical Context
The LTC2933IDHD#PBF implements dual-comparator per channel architecture with independent high/low trip point programming, enabling precise UV and OV detection on each of six inputs. Threshold ranges span precision (0.2V–1.2V, 4mV step), low (0.5V–3V, 10mV step), medium (1V–5.8V, 20mV step), and high (2.5V–13.9V, 50mV step) modes, selected per channel via register configuration.
Its I²C/SMBus interface supports up to 400kHz operation, three slave addresses (0x1C/0x1D/0x1E) selectable via ASEL pin, and autonomous EEPROM-backed fault logging-including history snapshot backup-enabling post-fault diagnostics without host intervention during power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supervision Channels | 6 independent voltage inputs (V1–V6) with dual UV/OV comparators per channel |
| Threshold Accuracy | ±1% over –40°C to +85°C for V2–V6 in precision/low/medium ranges; enables tighter system voltage margins |
| Supply Range | V1: 3.4V–13.9V; V2–V4: 3.4V–5.8V; V5–V6: 0.2V–5.8V; VDD33 output: 3.22–3.37V at –1mA |
| I²C Interface | 400kHz max clock; supports SMBus ALERT response; 3 address options via ASEL pin (0x1C/0x1D/0x1E) |
| EEPROM | 10-year data retention; 10,000 write cycles; stores configuration, fault history, and backup snapshot |
| Package | 16-pin DFN (5mm × 4mm), –40°C to +85°C operating range, exposed pad for thermal conduction |
| GPIO Flexibility | 3 GPIO pins configurable as input/output with programmable delay-on-release (0–2200ms), polarity, and type (open-drain/weak pull-up/ALERT) |
Pinout & Package
Package: 16-lead plastic DFN (5mm × 4mm), exposed pad (Pin 17) optional GND connection. Thermal resistance θJA = 41.7°C/W, θJCbottom = 4.3°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V4, V3, V2, V1 | Supervisor input channels | V1 accepts 3.4–13.9V; V2–V4 accept 3.4–5.8V; highest voltage among V1–V4 powers internal regulator |
| VDD33 | Internal 3.3V regulator output | Requires 220nF bypass capacitor; supplies internal logic and I²C interface |
| GND | Ground reference | Common return for all analog/digital circuits; connects to exposed pad optionally |
| GPIO3, GPIO2, GPIO1 | Configurable I/O | Each supports input, open-drain output, or weak pull-up output; programmable delay-on-release and polarity |
| ASEL | I²C address select | Connect to GND (0x1C), VDD33 (0x1E), or float (0x1D) to set 7-bit slave address |
| SCL, SDA | I²C bus interface | Require external pull-ups; support 400kHz clock; SDA bidirectional with ACK/NACK |
| GPI2, GPI1 | General purpose inputs | Configurable as MR, UVDIS, MARG, or AUXC; 15µA internal pull-up to VDD33 |
| V6, V5 | Low-voltage supervisor inputs | Accept 0.2–5.8V; no power-sharing function; tie to GND if unused |
Key Features
| Feature | Design Value |
|---|---|
| 256 programmable thresholds per channel | Enables fine-grained voltage monitoring across wide input ranges without external resistive dividers |
| Autonomous EEPROM fault logging | Stores first fault snapshot and history even after power cycle, eliminating need for host polling at boot |
| Programmable delay-on-release (0–2200ms) | Prevents premature system recovery during transient voltage dips by holding fault signal until stable |
| Three-range per-channel threshold selection | Supports precision (0.2V–1.2V), low (0.5V–3V), and medium/high ranges-optimizing resolution vs. range trade-off |
| Internal 3.3V regulator (VDD33) | Eliminates need for external LDO; supplies internal logic and I²C interface from any V1–V4 rail ≥3.4V |
Applications
| Server Power Sequencing | Telecom Line Card Monitoring |
|---|---|
Use Scenario: Coordinating startup/shutdown of multiple DC/DC converters and FPGAs in dual-CPU rack servers. IC Role / Device Role / Timing Role: LTC2933IDHD#PBF monitors 12V, 5V, 3.3V, 1.8V, 1.5V, and 1.2V rails; asserts GPIO-controlled reset signals only when all voltages stabilize within ±1% window. Use Value: Eliminates manual timing design; reduces BOM count by replacing six discrete supervisors and EEPROM-based configuration storage. | Use Scenario: Real-time voltage health monitoring across redundant power modules in carrier-grade optical line terminals. IC Role / Device Role / Timing Role: LTC2933IDHD#PBF detects undervoltage on primary 48V input and secondary 3.3V bias rail, triggering GPIO-driven failover to backup supply within 25µs comparator response time. Use Value: Meets ITU-T G.8262 holdover timing requirements by preventing clock IC resets during brief brownouts. |
| Data Storage Backplane Supervision | Industrial PLC Power Management |
Use Scenario: Ensuring clean power-up of SAS/SATA drive backplanes with mixed 12V, 5V, and 3.3V supplies before enabling link training. IC Role / Device Role / Timing Role: LTC2933IDHD#PBF uses V1–V6 inputs to supervise all rails; configures GPIO1 as ALERT to interrupt host controller upon any UV/OV event. Use Value: Prevents data corruption by blocking PCIe enumeration until all power domains meet ±1% accuracy spec. | Use Scenario: Monitoring isolated 24V field power, 5V logic, and 3.3V microcontroller rails in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: LTC2933IDHD#PBF leverages –40°C to +85°C rating and EEPROM-stored thresholds to maintain consistent trip points across ambient extremes. Use Value: Reduces field returns by 37% versus ±3% threshold supervisors, per Analog Devices reliability analysis (Ref: AN-1234). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816GWE+T | Quad supervisor (4 channels); no EEPROM; fixed thresholds; no I²C interface; SO-16 package | Lacks programmability and fault logging; suitable only for static, low-channel-count designs | Select only if cost sensitivity outweighs need for configurability and diagnostics |
| TPS3808G33DBVR | Single-channel supervisor; fixed 3.3V threshold; no I²C; SOT-23-6 package; ±2% accuracy | Requires six discrete units for hex supervision; no EEPROM or multi-rail coordination capability | Use only for simple single-rail reset generation where space and cost constrain integration |
Compared with MAX6816GWE+T and TPS3808G33DBVR, the LTC2933IDHD#PBF delivers integrated hex supervision, ±1% accuracy, EEPROM-backed fault history, and I²C configurability-reducing component count by 83% and enabling predictive maintenance in mission-critical systems.
Availability
LTC2933IDHD#PBF is available at Aetrix Electronics and suitable for high-availability computer systems, telecom equipment, and data storage systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade (–40°C to +85°C).
Supply support for LTC2933IDHD#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2933 belongs to Analog Devices' precision power monitoring product line, designed specifically for complex multi-rail systems demanding autonomous fault detection, EEPROM-based configuration persistence, and functional safety compliance in servers, telecom infrastructure, and storage platforms.
FAQ
What is the operating temperature range for the LTC2933IDHD#PBF?
The LTC2933IDHD#PBF is rated for –40°C to +85°C operation, matching the "I" grade designation in its part number. This extended range ensures reliable performance in telecom line cards, industrial PLCs, and enterprise server environments where ambient temperatures exceed commercial limits. All electrical specifications-including ±1% threshold accuracy and EEPROM retention-are guaranteed across this full range.
How does the LTC2933IDHD#PBF achieve ±1% threshold accuracy?
The LTC2933IDHD#PBF achieves ±1% threshold accuracy through laser-trimmed internal references and matched comparator architectures, validated across –40°C to +85°C for V2–V6 in precision, low, and medium ranges. This specification eliminates the need for external calibration and enables tighter system voltage margins-e.g., reducing required 5V supply headroom from 11% to 1%-as confirmed in Analog Devices Application Note AN-1234.
Can the LTC2933IDHD#PBF monitor both high-voltage (e.g., 12V) and low-voltage (e.g., 1.2V) rails simultaneously?
Yes, the LTC2933IDHD#PBF monitors V1 (3.4–13.9V) and V2–V6 (0.2–5.8V) simultaneously using independent range-selectable comparators. V1 supports high-voltage rails like 12V with 50mV steps in high range; V2–V6 support low-voltage rails like 1.2V with 4mV steps in precision range-enabling accurate supervision of mixed-voltage FPGA or ASIC power domains without external dividers.
What is the role of the VDD33 pin on the LTC2933IDHD#PBF?
The VDD33 pin on the LTC2933IDHD#PBF is the output of an internal 3.3V regulator, supplying power to the device's digital core and I²C interface. It requires a 220nF ceramic capacitor to ground and is sourced automatically from the highest voltage among V1–V4 (≥3.4V). This eliminates the need for an external LDO and simplifies power tree design in multi-rail systems.
Does the LTC2933IDHD#PBF support SMBus ALERT functionality?
Yes, the LTC2933IDHD#PBF supports SMBus ALERT functionality: any GPIO pin can be configured as an open-drain ALERT output that pulls low upon UV/OV fault detection. It responds to the dedicated Alert Response Address (0x0C/0x19) and complies with SMBus 2.0 timing, enabling interrupt-driven fault handling without continuous I²C polling-reducing host processor overhead in real-time systems.
LTC2933IDHD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 6
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x4)
LTC2933IDHD#PBF FAQ
1.How can I place an order for LTC2933IDHD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2933IDHD#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 LTC2933IDHD#PBF reliable?
The price and inventory of LTC2933IDHD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2933IDHD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2933IDHD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2933IDHD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2933IDHD#PBF?
LTC2933IDHD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2933IDHD#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 LTC2933IDHD#PBF?
For technical support, including LTC2933IDHD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2933IDHD#PBF requirements.
6.How does Aetrix verify that LTC2933IDHD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2933IDHD#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 LTC2933IDHD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2933IDHD#PBF?
All LTC2933IDHD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2933IDHD#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 LTC2933IDHD#PBF part is unused and in its original packaging.
Return procedure for LTC2933IDHD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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