My Inquiry
My Account
Texas Instruments TPS23881ARTQT
- Part No.:
- TPS23881ARTQT
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
TPS23881ARTQT.pdf
- Description:
- IC POE CNTRL 8 CHAN IEEE 802.3BT
- Quantity:
- Payment:
- Shipping:
Inventory:1,174
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS23881ARTQT from Texas Instruments is an IEEE 802.3bt-compliant 8-channel Type-4 Power Sourcing Equipment (PSE) controller for 4-pair PoE applications, featuring 200 mΩ current sense resistors, ±2.5% programmable power limiting accuracy, and SRAM-based firmware upgradability via I²C. It supports per-port 90 W delivery with 4-pair allocation and operates across –40°C to +125°C in NVR, campus switch, and industrial PoE infrastructure.
For engineers reviewing the TPS23881ARTQT datasheet, TPS23881ARTQT pinout, TPS23881ARTQT application, or TPS23881ARTQT equivalent, this device delivers deterministic 4-pair port classification, Kelvin-sense current monitoring with 2% accuracy, fast 1-/3-bit port shutdown, and compatibility with TI's FirmPSE system firmware for scalable multi-device 48-port deployments.
Technical Context
The TPS23881ARTQT implements independent 4-point detection per channel using DRAINn voltage sensing and dual-current sinking, enabling robust PD signature validation before power application. Its dedicated 14-bit integrating ADC per port performs parallel classification and real-time current telemetry with noise-immune MPS for DC disconnect.
It uses external N-channel MOSFETs driven by GAT1–GAT8 outputs, with foldback protection triggered by SEN1–SEN8 differential measurements across 0.200 Ω sense resistors referenced to KSENSA–KSENSD Kelvin points. Programmable SRAM enables field updates to maintain IEEE 802.3bt compliance without hardware revision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Complies fully with IEEE 802.3bt Type 4 (90 W per port, 4-pair), including auto-class discovery and legacy PD capacitance measurement (1–12 µF). |
| Channels | Eight independent PSE channels configurable as 2-pair (1 channel/port) or 4-pair (2 channels/port); supports mixed-mode port allocation. |
| Current Sensing | 2% accuracy via dedicated 14-bit ADC per port; uses 0.200 Ω RSENSE with Kelvin connections (KSENSA–KSENSD) to eliminate PCB trace resistance error. |
| Power Limit Accuracy | ±2.5% programmable port power limit enables reliable sourcing up to 125 W under 4-pair operation with tight thermal margin control. |
| Operating Temp | Rated for –40°C to +125°C junction temperature; qualified in Ultra Low Alpha (ULA) VQFN package for high-reliability industrial environments. |
| I²C Interface | Supports 400 kHz I²C bus with separate SDAI/SDAO lines for opto-isolated firmware updates; 16 kB SRAM enables in-field FirmPSE firmware upgrades. |
| Protection Features | Includes inrush foldback, operational foldback, DC disconnect (0.4–1.8 mV threshold), fast 1-/3-bit OSS shutdown (<104 µs), and short-circuit gate turnoff (<1 µs). |
Pinout & Package
VQFN-56 (RTQ) package, 8.00 mm × 8.00 mm body size with exposed thermal pad; requires low-impedance connection of AGND and DGND to PCB ground plane via thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRAIN1–DRAIN8 | Port output voltage monitor & detection sense | Measures VPWR-to-DRAINn voltage for PD detection, power-good assertion, and foldback triggering; internal 80–190 kΩ pull-up to VPWR when idle. |
| GAT1–GAT8 | External N-MOSFET gate drive output | Drives high-side FET gates with 10–12.5 V swing and 60–190 mA sink capability; turns off within 1–5 µs on /RESET or OSS assertion. |
| SEN1–SEN8 | Current sense input (differential) | Inputs to per-port ADC; referenced to KSENSA/B/C/D for Kelvin sensing across 0.200 Ω resistor - eliminates trace IR drop error in current measurement. |
| KSENSA–KSENSD | Kelvin sense reference | Shared Kelvin points: KSENSA (SEN1/SEN2), KSENSB (SEN3/SEN4), etc.; must be routed with matched low-inductance traces to sense resistor terminals. |
| SCL / SDAI / SDAO | I²C interface signals | SCL clock input; SDAI data input; SDAO open-drain data output - enables isolated or non-isolated firmware programming and register access. |
| INT / OSS / RESET | Interrupt, fast shutdown, reset control | INT is open-drain interrupt flag; OSS supports 1-bit (immediate) or 3-bit (priority-coded) port shutdown; RESET forces full device reset and register reload. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel IEEE 802.3bt Type 4 PSE | Enables full 90 W per port over 4-pair Ethernet cabling with backward compatibility to Type 3 and legacy PDs. |
| Per-port 14-bit integrating ADC | Provides continuous current monitoring and parallel classification - reduces port turn-on time versus sequential scanning architectures. |
| SRAM-based firmware storage | Allows field-upgradable IEEE compliance and interoperability fixes via I²C without replacing hardware or re-spinning PCBs. |
| 200 mΩ RSENSE with Kelvin sensing | Reduces power loss and board area vs. 255 mΩ alternatives; Kelvin routing ensures <2% current measurement accuracy across temperature. |
| Flexible operating modes | Auto, semi-auto, and manual/diagnostic modes support development, certification, and production deployment with identical hardware. |
Applications
| Video Surveillance Infrastructure | Enterprise Campus Switching |
|---|---|
|
Use Scenario: Powering multi-sensor PTZ cameras and AI-enabled edge analytics nodes over single Cat6 cables in outdoor NVR deployments. IC Role / Device Role / Timing Role: TPS23881ARTQT acts as the primary PSE controller managing eight concurrent 4-pair PoE ports with dynamic power budgeting and fault isolation. Use Value: Enables 90 W delivery per port to support high-power imaging sensors and onboard compute, while Kelvin-sense accuracy prevents false disconnects during thermal transients. |
Use Scenario: Integrated into 24- or 48-port managed switches for SMB and branch office networks requiring IEEE 802.3bt compliance and remote firmware updates. IC Role / Device Role / Timing Role: TPS23881ARTQT serves as scalable PSE engine in modular switch line cards, coordinated via TI FirmPSE firmware across multiple devices. Use Value: SRAM programmability allows post-deployment IEEE standard updates; 4-pair allocation flexibility supports mixed legacy/Type 4 PD fleets without redesign. |
| Industrial IoT Gateway | Smart Building Control Panel |
|
Use Scenario: Powering ruggedized wireless APs, LoRaWAN gateways, and environmental sensor clusters in factory-floor edge cabinets with wide temperature range requirements. IC Role / Device Role / Timing Role: TPS23881ARTQT provides fault-tolerant, thermally robust PSE functionality with –40°C to +125°C operation and integrated foldback protection. Use Value: ULA packaging and 125°C rating ensure long-term reliability in uncooled enclosures; per-port ADC telemetry enables predictive maintenance logging. |
Use Scenario: Embedded in centralized HVAC and lighting control panels delivering PoE to distributed occupancy sensors, thermostats, and digital signage. IC Role / Device Role / Timing Role: TPS23881ARTQT manages mixed 2-pair and 4-pair loads with selectable power classes (15–90 W) and automatic legacy PD detection. Use Value: Single-chip 8-channel integration reduces BOM count and layout complexity; capacitance measurement ensures safe powering of aging building infrastructure PDs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23880RTQT | Same 8-channel architecture but uses 0.255 Ω RSENSE and lacks SRAM; ±3.0% PCUT accuracy above 90 W; no ULA packaging. | Supports only Type 3 (60 W) and lower-power Type 4 implementations; not suitable for >90 W sustained 4-pair operation. | Select TPS23880RTQT only if cost sensitivity outweighs need for field-upgradable firmware, 90+ W accuracy, or extended temperature reliability. |
| TPS23882RTQT | 8-channel like TPS23881ARTQT but limited to 2-pair (Type 3) operation only; same 0.200 Ω RSENSE and SRAM; no 4-pair PCUT support. | Designed exclusively for 2-pair PoE systems (max 60 W/port); cannot configure any port as 4-pair; lacks 4-pair classification logic. | Choose TPS23882RTQT only for cost-optimized 2-pair-only switches where future 4-pair upgrade path is unnecessary. |
Compared with TPS23880RTQT and TPS23882RTQT, the TPS23881ARTQT uniquely combines 4-pair Type 4 support, ±2.5% high-power accuracy, SRAM-based field updates, and ULA packaging - making it the sole option for scalable, future-proof, high-density 90 W PoE infrastructure.
Availability
TPS23881ARTQT is available at Aetrix Electronics and suitable for video surveillance infrastructure, enterprise campus switching, and industrial IoT gateway designs requiring stable component supply, long lifecycle support, and guaranteed IEEE 802.3bt compliance.
Supply support for TPS23881ARTQT 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with decades of PoE innovation.
The TPS23881ARTQT belongs to TI's high-density PoE PSE controller product line, engineered specifically for scalable, firmware-upgradeable 4-pair IEEE 802.3bt infrastructure in NVRs, campus switches, and industrial gateways.
FAQ
What is the maximum per-port power supported by the TPS23881ARTQT?
The TPS23881ARTQT supports up to 90 W per port in IEEE 802.3bt Type 4 mode using 4-pair allocation. With its ±2.5% programmable power limit accuracy and 200 mΩ current sense resistor, it can reliably sustain >90 W (up to ~125 W) in optimized thermal designs while maintaining compliance and safety margins.
Does the TPS23881ARTQT support legacy PoE devices (802.3af/at)?
Yes, the TPS23881ARTQT supports single- and dual-signature PDs per IEEE 802.3af/at, including legacy capacitance measurement (1–12 µF range) and 2-pair power allocation (15.4 W, 30 W, 45 W). Its auto-class discovery and flexible port configuration ensure seamless coexistence with mixed-generation PD fleets.
How does the Kelvin sensing architecture improve current measurement accuracy in the TPS23881ARTQT?
The TPS23881ARTQT uses four Kelvin sense pairs (KSENSA–KSENSD) to measure voltage differentially across each 0.200 Ω current sense resistor. This eliminates errors from PCB trace resistance and thermal EMF, enabling 2% current sensing accuracy across –40°C to +125°C - critical for precise power policing and thermal management in the TPS23881ARTQT.
Can the TPS23881ARTQT firmware be updated in the field after deployment?
Yes, the TPS23881ARTQT integrates 16 kB of SRAM that stores executable firmware and configuration data. Using the I²C interface (SCL/SDAI/SDAO), field updates can be applied without hardware modification - ensuring ongoing IEEE 802.3bt compliance, interoperability with new PDs, and bug fixes throughout the product lifecycle of the TPS23881ARTQT.
What thermal management features does the TPS23881ARTQT provide for high-power PoE designs?
The TPS23881ARTQT includes per-port inrush and operational foldback protection, fast 1-/3-bit OSS shutdown (<104 µs), and DC disconnect with adjustable thresholds (0.4–1.8 mV). Its VQFN-56 package features an exposed thermal pad tied to AGND/DGND, achieving 0.5°C/W junction-to-case (bottom) resistance - enabling efficient heat extraction in compact, high-density PoE switch designs using the TPS23881ARTQT.
TPS23881ARTQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PSE)
- Number of Channels:
- 8
- Power - Max:
- 127 W
- Internal Switch(s):
- No
- Auxiliary Sense:
- No
- Standards:
- 802.3at (PoE+), 802.3bt
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 6mA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VQFN (8x8)
TPS23881ARTQT FAQ
1.How can I place an order for TPS23881ARTQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23881ARTQT 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 TPS23881ARTQT reliable?
The price and inventory of TPS23881ARTQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23881ARTQT is usually 5 days.
3.What payment methods are accepted for TPS23881ARTQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23881ARTQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23881ARTQT?
TPS23881ARTQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23881ARTQT 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 TPS23881ARTQT?
For technical support, including TPS23881ARTQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23881ARTQT requirements.
6.How does Aetrix verify that TPS23881ARTQT is sourced from the original manufacturer or authorized distributors?
All TPS23881ARTQT 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 TPS23881ARTQT meets industry standards.
7.What is the process for return or replacement of TPS23881ARTQT?
All TPS23881ARTQT units undergo pre-shipment inspection (PSI). If there is an issue with TPS23881ARTQT, 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 TPS23881ARTQT part is unused and in its original packaging.
Return procedure for TPS23881ARTQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS23881ARTQT Tags
-
TPS2378DDAR
Texas Instruments
-
TPS23753APWR
Texas Instruments
-
TPS23756PWPR
Texas Instruments
-
TPS23750PWPR
Texas Instruments
-
MP8007GV-Z
Monolithic Power Systems Inc.
-
TPS23861PWR
Texas Instruments
-
TPS23753PWR
Texas Instruments
-
PD69201ILD-TR
Microchip Technology
-
SI3402-B-GM
Skyworks Solutions Inc.
-
SI3402-B-GMR
Skyworks Solutions Inc.
-
SI34071-A01-GMR
Skyworks Solutions Inc.
-
SI3404-A-GMR
Skyworks Solutions Inc.
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…
