Microchip Technology PD69204T4ILQ-TR-LE

Overview

PD69204T4T4ILQ-TR-LE from Microchip Technology is a 4-port IEEE 802.3af/at/bt and Power over HDBaseT (PoH) Power Sourcing Equipment (PSE) manager IC in an 8 mm × 8 mm, 56-pin QFN package. It integrates analog power control, real-time port monitoring, 10-bit ADC, and SPI slave interface, and delivers up to 95 W per port for midspan or switch-integrated PoE systems.

For engineers reviewing the PD69204T4T4ILQ-TR-LE datasheet, PD69204T4T4ILQ-TR-LE pinout, PD69204T4T4ILQ-TR-LE application, or PD69204T4T4ILQ-TR-LE equivalent, key selection criteria include IEEE 802.3bt Class 8 compliance, 4-port scalability with cascade support, integrated 3.3 V/5 V regulators, thermal monitoring accuracy (±3 °C), and real-time overload protection with 64 ms cutoff timing.

Technical Context

The PD69204T4T4ILQ-TR-LE implements a digital state-machine–driven PSE control architecture with dedicated PD detection generator, classification generator, and current limiter circuits. It supports both 2-pair and 4-pair port configurations and enables Fast and Perpetual PoE modes via configurable load current settings and emergency power bank management.

Its functional block includes a 10-bit ADC for continuous port voltage/current monitoring (3 ms measurement period), internal 8 MHz oscillator, Power-on Reset with 2.775 V DVDD trip point and 0.25 V hysteresis, and SPI slave interface operating at 1 MHz with ADDR0–ADDR3 address selection (supports addresses 0–11).

Key Specifications

Pinout & Package

PD69204T4T4ILQ-TR-LE uses an 8 mm × 8 mm, 56-pin plastic QFN package with exposed thermal pad (EPAD) connected to AGND. The package is MSL3 and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PoE PSE manager applications.

Compared with PD69208T4T4ILQ-TR-LE and PD69208MILQ-TR-LE, the PD69204T4T4ILQ-TR-LE uniquely balances 4-port scalability, 95 W Class 8 capability, and PoH readiness - making it optimal for compact midspans and modular switch line cards where port count and power density must scale independently.

Availability

PD69204T4T4ILQ-TR-LE is available at Aetrix Electronics and suitable for enterprise switches, industrial midspans, and video surveillance NVRs requiring stable component supply, long-term lifecycle assurance, and IEEE 802.3bt Class 8 compliance.

Supply support for PD69204T4T4ILQ-TR-LE 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

Microchip Technology Inc. is a global semiconductor manufacturer specializing in microcontrollers, analog, FPGA, and connectivity solutions, with headquarters in Chandler, Arizona.

The PD69204T4T4ILQ-TR-LE belongs to Microchip's Generation 6 PoE PSE Manager family, designed specifically for scalable, standards-compliant Power over Ethernet infrastructure supporting IEEE 802.3af/at/bt and Power over HDBaseT.

FAQ

What is the maximum number of PD69204T4T4ILQ-TR-LE devices that can be cascaded in a single system?

The PD69204T4T4ILQ-TR-LE supports cascading up to 12 devices for a total of 48 logical ports. Each PD69204T4T4ILQ-TR-LE contributes 4 ports, and the cascade uses SPI daisy-chaining with unique ADDR0–ADDR3 addressing (0–11). This architecture eliminates external arbitration logic and enables linear scalability in midspan and switch designs.

Does PD69204T4T4ILQ-TR-LE support Power over HDBaseT (PoH) and how is it implemented?

Yes, PD69204T4T4ILQ-TR-LE supports Power over HDBaseT (PoH) per the HDBaseT standard. It implements three-event classification and maintains PoH-specific timing parameters including TMPS (3–5 ms signature validity) and PoH-class current limits up to 980 mA. The device shares the same IEEE 802.3bt Class 8 hardware platform, enabling dual-mode operation without firmware modification.

What are the thermal management capabilities of PD69204T4T4ILQ-TR-LE and how is temperature monitored?

PD69204T4T4ILQ-TR-LE features on-die thermal sensing with ±3 °C accuracy and 1.9384 °C/LSB resolution. Temperature data is read via the 10-bit ADC and reported through SPI registers. The IC also includes over-temperature protection that triggers automatic port shutdown if junction temperature exceeds 125 °C, ensuring reliability in enclosed industrial enclosures.

Can PD69204T4T4ILQ-TR-LE drive both 2-pair and 4-pair PoE ports simultaneously in the same system?

Yes, PD69204T4T4ILQ-TR-LE supports mixed 2-pair and 4-pair port configurations in the same system. Its port matrix control logic allows independent configuration per port, and the datasheet explicitly confirms "any combination of 2-pair and 4-pair in the same system is possible and supported." This flexibility simplifies migration from PoE+ to PoE++ infrastructure.

What is the role of the IREF pin on PD69204T4T4ILQ-TR-LE and what resistor value is required?

The IREF pin on PD69204T4T4ILQ-TR-LE sets the reference for PD detection and classification accuracy. It requires a 28.7 kΩ 1% resistor connected to AGND; for IEEE 802.3bt and PoH applications, a tighter 0.1% tolerance resistor is mandatory to meet classification voltage tolerances (VCLASS = 15.5–20.5 V) and ensure interoperability with Class 5–8 PDs.