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Analog Devices Inc. LTC2933IGN#PBF
- Part No.:
- LTC2933IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2933IGN#PBF.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,219
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Product details
Overview
LTC2933IGN#PBF from Analog Devices is a programmable hex voltage supervisor IC with EEPROM configuration, supervising up to six independent power supply rails (V1–V6) via I²C-programmable UV/OV thresholds. It features ±1% threshold accuracy over temperature, internal 3.3V regulator (VDD33), and three configurable GPIOs supporting ALERT output, fault latching, and programmable delay-on-release - deployed in telecom equipment for multi-rail power sequencing and fault logging.
For engineers reviewing the LTC2933IGN#PBF datasheet, LTC2933IGN#PBF pinout, LTC2933IGN#PBF application, or LTC2933IGN#PBF equivalent, key selection criteria include guaranteed ±1% threshold accuracy across all six channels, I²C/SMBus interface with three slave address options (0x1C/0x1D/0x1E), 16-pin SSOP package with –40°C to +85°C industrial temperature range, and autonomous EEPROM-backed fault history retention without host intervention.
Technical Context
The LTC2933IGN#PBF implements six independent comparator channels, each with dual (UV/OV) thresholds programmable in precision/low/medium/high ranges - V1 supports 2.5V–13.9V (50mV steps), V2–V6 support 0.2V–5.8V (4mV/10mV/20mV steps). Threshold accuracy is ±1% over full temperature range for V2–V6 in precision range and ±1.5% for V1 in medium range.
It integrates an I²C-compatible interface (up to 400kHz), internal EEPROM (10-year retention, 10,000 write cycles), and a 3.3V regulator (VDD33) sourcing up to 1.5mA. Two GPI inputs (GPI1/GPI2) support MR/UVDIS/MARG/AUXC functions, while three GPIO pins (GPIO1–GPIO3) are software-configurable as inputs, open-drain outputs, or weak pull-up outputs with programmable polarity and delay-on-release (1.1ms–2.2s).
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 range; ±1.5% for V1 in medium range |
| I²C Interface | Standard-mode SMBus-compatible (400kHz max); 3 selectable slave addresses (0x1C/0x1D/0x1E) |
| EEPROM | Nonvolatile storage for configuration and fault history; 10-year data retention, 10,000 write cycles |
| VDD33 Regulator | On-chip 3.3V output (3.22–3.37V) with 1.5mA current limit; requires 220nF bypass capacitor |
| Operating Temp | –40°C to +85°C (industrial grade), validated for continuous operation in telecom and server environments |
| Supply Range | V1: 3.4V–13.9V; V2–V4: 3.4V–5.8V; V5–V6: 0.2V–5.8V; VDD33: 3.22V–3.37V |
Pinout & Package
Package: 16-lead plastic SSOP (narrow), 5.3mm × 5.3mm body, 0.65mm pitch, exposed pad not present (DFN-only feature). Pin 1 = V4, Pin 16 = V5; GND (Pin 6) must be connected to system ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V4, V3, V2, V1 | Supervisor input channels | V1 accepts high-voltage rails (up to 13.9V); V2–V4 share supply selection logic with V1 |
| V5, V6 | Low-voltage supervisor inputs | Independent of V1–V4 supply selection; support 0.2V–5.8V thresholds |
| VDD33 | Internal 3.3V regulator output | Power source for internal logic; requires mandatory 220nF ceramic capacitor to GND |
| GND | Reference ground | Primary return path for all analog and digital circuitry; connect to low-impedance system ground |
| GPIO1–GPIO3 | Configurable I/O | Software-defined as input, open-drain output, or weak pull-up; support ALERT latching and delay-on-release |
| GPI1, GPI2 | General-purpose inputs | Programmable as MR, UVDIS, MARG, or AUXC; each includes 15µA internal pull-up to VDD33 |
| SCL, SDA | I²C bus interface | Require external pull-ups (3.3V or 5V); support SMBus Alert Response Address (0x0C) |
| ASEL | I²C address select | Connect to GND/VDD33/floating to set slave address to 0x1C/0x1D/0x1E |
Key Features
| Feature | Design Value |
|---|---|
| 256 programmable thresholds per channel | Enables fine-grained margining and adaptive trip points across all six rails without hardware change |
| Autonomous EEPROM fault backup | Preserves first-fault snapshot and history across power cycles, enabling post-failure root-cause analysis |
| Three-range per-channel monitoring | Supports wide input spans: precision (0.2–1.2V), low (0.5–3V), and medium/high (1–13.9V) with appropriate LSB resolution |
| Programmable delay-on-release | Eight discrete delay settings (1.1ms–2.2s) per GPIO output prevent nuisance resets during transient recovery |
| Functional safety enabler | Meets requirements for system-level safety certification via deterministic fault detection, logging, and configurable response |
Applications
| Telecom Power Management | Server PSU Monitoring |
|---|---|
Use Scenario: Real-time supervision of distributed 12V, 5V, 3.3V, 1.8V, 1.5V, and 2.5V rails in 48V-powered base station line cards. IC Role / Device Role / Timing Role: Centralized voltage supervisor coordinating power-good signaling, fault isolation, and graceful shutdown via I²C. Use Value: ±1% threshold accuracy prevents false trips during thermal drift, ensuring uninterrupted operation in -40°C to +85°C outdoor enclosures. | Use Scenario: Multi-phase VRM output monitoring in dual-CPU rack servers with redundant PSUs. IC Role / Device Role / Timing Role: Six-channel rail monitor feeding fault status to BMC via SMBus; GPIO3 configured as ALERT to interrupt host on OV/UV event. Use Value: EEPROM-stored fault history enables BMC to correlate timing of rail failures with thermal events or firmware updates. |
| Industrial PLC Backplane | Network Switch Fabric |
Use Scenario: Supervision of isolated 24V, 12V, 5V, 3.3V, 1.2V, and 1.0V supplies powering FPGA, PHY, and microcontroller subsystems. IC Role / Device Role / Timing Role: Configurable GPI1 as manual reset input; GPIO1 as latched ALERT output tied to PLC watchdog timer. Use Value: Programmable delay-on-release (205ms default) ensures stable power-up before releasing reset to FPGA fabric. | Use Scenario: Monitoring core, I/O, and SerDes voltages (1.2V, 1.8V, 2.5V, 3.3V, 5V, 12V) in 10G/25G Ethernet switches. IC Role / Device Role / Timing Role: V1–V6 mapped to switch ASIC rails; GPI2 configured as margin test input to force controlled undervoltage for validation. Use Value: 256-step threshold resolution allows precise 1% margin testing at 1.2V (±12mV), meeting IEEE 802.3 compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2937IGN#PBF | Same pinout and I²C interface; adds integrated watchdog timer and reset timeout control | Required when system-level reset coordination and watchdog timeout management are needed beyond basic supervision | Select LTC2937IGN#PBF if watchdog functionality and programmable reset pulse width are required |
| TPS3808G33DBVR | Single-channel, fixed 3.3V UV detector; no I²C, no EEPROM, no multi-rail capability | Only suitable for simple single-rail reset generation where programmability and fault logging are unnecessary | Choose TPS3808G33DBVR only for cost-sensitive, single-supply applications without configuration needs |
Compared with LTC2933IGN#PBF, LTC2937IGN#PBF adds watchdog and reset timing control but shares identical supervision architecture and EEPROM fault logging, while TPS3808G33DBVR offers minimal fixed-function reset at lower cost but lacks configurability, multi-rail support, and nonvolatile fault history.
Availability
LTC2933IGN#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, network server, and industrial embedded applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.
Supply support for LTC2933IGN#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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control systems.
The LTC2933 belongs to Analog Devices' precision power supervision product line, designed specifically for complex multi-rail systems in telecom, computing, and industrial equipment where configurability, accuracy, and autonomous fault logging are critical.
FAQ
What is the operating temperature range of the LTC2933IGN#PBF?
The LTC2933IGN#PBF is rated for –40°C to +85°C, meeting industrial-grade requirements. This range is validated across all electrical specifications including ±1% threshold accuracy for V2–V6 in precision range and full I²C functionality at 400kHz. The device uses internal thermal compensation to maintain specification compliance throughout this span, making it suitable for deployment in uncontrolled ambient environments such as telecom cabinets and factory-floor controllers. The LTC2933IGN#PBF datasheet confirms junction temperature limits up to 125°C with appropriate PCB thermal design.
How does the EEPROM in the LTC2933IGN#PBF support system reliability?
The EEPROM in the LTC2933IGN#PBF stores both user configuration and fault history, providing autonomous operation without host intervention. It retains data for 10 years and withstands 10,000 write cycles, enabling reliable post-failure diagnostics by preserving the first fault snapshot across power cycles. This capability eliminates dependency on external memory or host software for critical fault logging, directly enhancing system uptime and serviceability. The LTC2933IGN#PBF uses dedicated STORE_USER and RESTORE_USER commands to manage EEPROM synchronization, ensuring deterministic behavior during power transitions.
Can the LTC2933IGN#PBF monitor both high-voltage and low-voltage rails simultaneously?
Yes, the LTC2933IGN#PBF monitors six independent rails with flexible input ranges: V1 supports 2.5V–13.9V (e.g., 12V or 5V system rails), while V2–V6 support 0.2V–5.8V (e.g., 1.8V, 1.5V, 1.2V FPGA cores). Each channel uses separate comparator architectures and programmable ranges - V1's high-range mode uses 50mV LSB steps, while V2–V6 precision mode uses 4mV steps for sub-1V accuracy. This dual-range capability allows simultaneous supervision of legacy 12V backplanes and modern sub-1V ASIC supplies within a single IC, as confirmed in the LTC2933IGN#PBF datasheet's Electrical Characteristics table.
What GPIO configurations are supported by the LTC2933IGN#PBF?
The LTC2933IGN#PBF supports three GPIO pins (GPIO1–GPIO3) configurable as inputs, open-drain outputs, or weak pull-up outputs with programmable polarity and delay-on-release (1.1ms–2.2s). Each can be mapped to respond to UV/OV faults, MR, or auxiliary comparator events. One GPIO may be designated as SMBus-compliant ALERT output, latching until cleared via I²C command or alert response. Configuration is performed via dedicated registers (GPIO1_CONFIG, GPIO2_3_CONFIG) and persists in EEPROM. The LTC2933IGN#PBF pinout and register map confirm full software control without external components.
Is the LTC2933IGN#PBF pin-compatible with other members of the LTC293x family?
The LTC2933IGN#PBF shares identical 16-pin SSOP pinout and register map with LTC2934–LTC2937 variants, enabling direct PCB reuse across the family. However, functional differences exist: LTC2934 adds a fourth GPI, LTC2935 adds temperature sensing, LTC2936 adds dual watchdogs, and LTC2937 adds reset timeout control. All maintain backward-compatible I²C addressing and EEPROM structure. The LTC2933IGN#PBF datasheet explicitly states mechanical and electrical compatibility with these variants in the Order Information table, confirming drop-in replacement for basic supervision use cases.
LTC2933IGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- 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-SSOP
LTC2933IGN#PBF FAQ
1.How can I place an order for LTC2933IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2933IGN#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 LTC2933IGN#PBF reliable?
The price and inventory of LTC2933IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2933IGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC2933IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2933IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2933IGN#PBF?
LTC2933IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2933IGN#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 LTC2933IGN#PBF?
For technical support, including LTC2933IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2933IGN#PBF requirements.
6.How does Aetrix verify that LTC2933IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2933IGN#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 LTC2933IGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC2933IGN#PBF?
All LTC2933IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2933IGN#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 LTC2933IGN#PBF part is unused and in its original packaging.
Return procedure for LTC2933IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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