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Analog Devices Inc. LTC2936CGN#PBF
- Part No.:
- LTC2936CGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2936CGN#PBF.pdf
- Description:
- IC SUPERVISOR 6 CHANNEL 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:215
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Product details
Overview
LTC2936CGN#PBF from Analog Devices (formerly Linear Technology) is a programmable hex voltage supervisor IC with integrated EEPROM, I²C interface, and six comparator outputs. It monitors up to six independent supply rails (0.2V–5.8V range), offers ±1% threshold accuracy, 7.5µs comparator response, and autonomous fault logging for high-availability server power sequencing.
For engineers reviewing the LTC2936CGN#PBF datasheet, LTC2936CGN#PBF pinout, LTC2936CGN#PBF application, or LTC2936CGN#PBF equivalent, key selection criteria include I²C-configurable UV/OV thresholds per channel, GPIO delay-on-release timing (1ms–1.64s), EEPROM-backed fault history, and dual-package support (QFN/SSOP) with 0°C to 70°C operation.
Technical Context
The LTC2936CGN#PBF implements six independent analog comparators with user-selectable precision/low/medium input ranges, each supporting separate overvoltage and undervoltage trip points programmed via 8-bit DACs. Threshold resolution is 4mV (precision), 10mV (low), or 20mV (medium) per LSB.
Its digital subsystem includes an I²C/SMBus slave interface (up to 400kHz), configurable GPI/GPIO logic mapping, programmable output polarity and type (open-drain or weak pull-up), and autonomous EEPROM backup of fault snapshots and register states without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supervised Channels | 6 independent voltage inputs (V1–V6) with per-channel OV/UV detection |
| Threshold Accuracy | ±1% max over temperature - enables tight system voltage margining without false resets |
| Comparator Response | 7.5µs at 20 LSB overdrive - ensures fast fault reaction in high-speed power systems |
| I²C Interface | Standard-mode (10–400kHz) SMBus-compatible bus - supports multi-drop addressing via ASEL0/ASEL1 pins |
| EEPROM Endurance | 10,000 write cycles with 10-year data retention - sustains field firmware updates and configuration persistence |
| Supply Range | VPWR = 3.4V to 13.9V; VDD33 = 3.3V regulator output - powers from main rail or external 3.3V source |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade computing and telecom infrastructure |
Pinout & Package
Package: 24-pin 4mm × 5mm plastic QFN (UFD) with exposed pad (GND). Pin count and layout match SSOP variant; footprint interchangeable with thermal and electrical equivalence.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1–V6 | Analog voltage input | Monitor up to six supplies; each supports three programmable threshold ranges (0.2–1.2V, 0.5–3V, 1–5.8V) |
| CMP1–CMP6 | Open-drain comparator output | Assert low on OV/UV fault; internally pulled up to VDD33 (15µA) |
| GPI1, GPI2 | Configurable general-purpose input | Selectable as MR, UVDIS, MARG, WP, or AUXC - defines system-level reset behavior and fault masking |
| GPIO1–GPIO3 | Programmable input/output | Map to any other GPIO/CMP/GPI; support ALERT latching, delay-on-release (1ms–1.64s), and polarity inversion |
| SCL, SDA | I²C serial interface | 400kHz max clock; requires external pull-ups; supports 9 unique slave addresses via ASEL0/ASEL1 |
| VPWR, VDD33, GND | Power supply terminals | VPWR powers internal 3.3V regulator; VDD33 can be bypassed to external 3.3V source for low-noise operation |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based configuration storage | Retains all threshold, GPIO, and fault settings across power cycles - eliminates boot-time reprogramming |
| Per-channel programmable trip points | 256 discrete thresholds per channel across three ranges - supports mixed-rail systems (1.2V core, 3.3V I/O, 12V bias) |
| Autonomous fault snapshot backup | First fault event stored in EEPROM within 10ms - enables post-failure root-cause analysis without host polling |
| Configurable GPIO delay-on-release | Eight selectable delays (1ms–1.64s) per GPIO - prevents nuisance toggling during marginal supply recovery |
| I²C address flexibility | 9 unique 7-bit addresses via ASEL0/ASEL1 (GND/VDD33/floating) - simplifies multi-device bus design |
Applications
| Server Power Sequencing | Telecom Line Card Monitoring |
|---|---|
Use Scenario: Coordinating startup/shutdown of CPU, memory, and I/O rails in dual-socket x86 servers. IC Role / Device Role / Timing Role: Voltage supervisor providing synchronized reset assertion and rail-fault isolation via CMP outputs and GPIO-controlled enable signals. Use Value: Prevents partial-power-up states using precise ±1% thresholds and 7.5µs response - avoids latch-up or configuration corruption during sequencing. | Use Scenario: Real-time monitoring of +3.3V, +5V, –48V, and auxiliary bias rails in carrier-grade line cards. IC Role / Device Role / Timing Role: Fault detector with EEPROM-backed history logging and ALERT interrupt generation for remote diagnostics. Use Value: Enables unattended field failure analysis via stored fault snapshots - reduces MTTR by eliminating need for live debug access. |
| Industrial PLC Power Management | High-Density Storage Controller |
Use Scenario: Supervising multiple isolated DC-DC converters powering FPGA, ADC, and communication interfaces in harsh environments. IC Role / Device Role / Timing Role: Configurable supervisor with GPI inputs for manual reset and margin testing, plus GPIO outputs driving status LEDs and safety interlocks. Use Value: Supports in-system margin testing via MARG input and programmable delay-on-release - validates supply stability under load transients. | Use Scenario: Ensuring clean power-up of NVMe SSD controller, DRAM buffer, and PCIe PHY in enterprise SSD modules. IC Role / Device Role / Timing Role: Hex supervisor asserting individual CMP outputs to gate power-enable signals and trigger host-side error reporting via ALERT. Use Value: Guarantees deterministic initialization sequence using per-rail OV/UV detection - eliminates race conditions between controller and memory subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816ESE+ | Quad supervisor (not hex); no EEPROM; fixed thresholds; no I²C interface | Limited to simpler systems requiring only basic reset generation without programmability or fault logging | Choose when cost sensitivity outweighs configurability needs and system has ≤4 rails |
| TPS3808G33DBVR | Single-channel supervisor; fixed 3.3V threshold; no I²C; no EEPROM; no GPIOs | Only suitable for dedicated 3.3V rail monitoring without multi-rail coordination or diagnostics | Use only as drop-in replacement for single-rail reset generation where programmability is unnecessary |
Compared with MAX6816ESE+ and TPS3808G33DBVR, the LTC2936CGN#PBF uniquely delivers hex-channel supervision with EEPROM-persistent configuration, I²C programmability, and GPIO flexibility - essential for complex, field-upgradable systems requiring diagnostic traceability and adaptive power management.
Availability
LTC2936CGN#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 commercial-temperature performance.
Supply support for LTC2936CGN#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC2936CGN#PBF belongs to the Linear Technology voltage supervisor product line, designed specifically for mission-critical power integrity monitoring in servers, networking gear, and storage infrastructure where reliability, configurability, and fault diagnostics are paramount.
FAQ
What is the operating temperature range for the LTC2936CGN#PBF?
The LTC2936CGN#PBF is rated for 0°C to 70°C operation. This commercial-grade specification aligns with its target applications in servers, telecom line cards, and enterprise storage controllers where ambient conditions remain controlled. The device uses the "C" grade suffix (LTC2936C) and is packaged in a 24-pin QFN (UFD) variant. Derating applies for EEPROM endurance above 85°C junction temperature.
Does the LTC2936CGN#PBF require external pull-up resistors on SCL and SDA lines?
Yes, the LTC2936CGN#PBF requires external pull-up resistors on both SCL and SDA lines to ensure proper I²C bus operation. The internal circuitry does not provide active pull-ups on these pins. Recommended values depend on bus capacitance and speed but typically fall between 2.2kΩ and 10kΩ for standard-mode (100kHz) or fast-mode (400kHz) operation with ≤400pF total load.
Can the LTC2936CGN#PBF monitor sub-1V supplies such as 0.85V or 0.65V core rails?
Yes, the LTC2936CGN#PBF supports monitoring of sub-1V supplies using its precision range (0.2V–1.2V) with 4mV step resolution. For a 0.85V rail, the threshold can be programmed to ±1% accuracy (±8.5mV), enabling robust detection of droop or overvoltage events critical for modern low-voltage processors and FPGAs.
How does the EEPROM fault backup function work in the LTC2936CGN#PBF?
The LTC2936CGN#PBF automatically stores the first detected fault condition (including channel, fault type, and timestamp) into internal EEPROM within 10ms of occurrence. This backup persists across power cycles and is independent of host software - ensuring forensic data remains available even after unexpected shutdowns or brownouts.
Is the LTC2936CGN#PBF pin-compatible with other variants like LTC2936CUFD#PBF?
Yes, the LTC2936CGN#PBF and LTC2936CUFD#PBF share identical 24-pin QFN (4mm × 5mm) packaging, pinout, and electrical specifications. The "GN" and "UFD" order codes both refer to the same physical package; "GN" is Linear's legacy designation, while "UFD" is the standardized JEDEC QFN identifier. No PCB redesign is needed when substituting between them.
LTC2936CGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-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:
- -
- Reset Timeout:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
LTC2936CGN#PBF FAQ
1.How can I place an order for LTC2936CGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2936CGN#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 LTC2936CGN#PBF reliable?
The price and inventory of LTC2936CGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2936CGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC2936CGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2936CGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2936CGN#PBF?
LTC2936CGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2936CGN#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 LTC2936CGN#PBF?
For technical support, including LTC2936CGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2936CGN#PBF requirements.
6.How does Aetrix verify that LTC2936CGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2936CGN#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 LTC2936CGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC2936CGN#PBF?
All LTC2936CGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2936CGN#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 LTC2936CGN#PBF part is unused and in its original packaging.
Return procedure for LTC2936CGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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