Microchip Technology USB2640I-HZH-02-TR

Overview

USB2640I-HZH-02-TR from Microchip Technology is a USB 2.0 Hi-Speed hub IC with integrated flash media controller supporting SD 2.0, MMC 4.2, Memory Stick 1.43/Pro/HG/Duo, and xD-Picture Card 1.2. It delivers three downstream ports (one internal flash interface + two external USB ports), 8051 core at 60 MHz, 64 KB ROM / 9 KB RAM, and operates across -40°C to +85°C for industrial embedded host expansion in media-aware peripherals.

For engineers reviewing the USB2640I-HZH-02-TR datasheet, USB2640I-HZH-02-TR pinout, USB2640I-HZH-02-TR application, or USB2640I-HZH-02-TR equivalent, key selection criteria include xD-Picture Card support, multiplexed combo socket interface, PortSwap/PortMap programmability, PHYBoost signal drive control, and single-supply 3.3 V operation with internal 1.8 V core regulation.

Technical Context

The USB2640I-HZH-02-TR integrates a transaction translator (TT) enabling concurrent Low-Speed and Full-Speed peripheral operation on all enabled downstream ports, while its hardware-controlled data flow architecture handles self-mapped flash media without CPU intervention. The 8051 microprocessor executes firmware from 64 KB on-chip ROM and manages configuration via I²C or SPI external EEPROM.

Its 48-pin QFN package embeds dedicated pins for xD-Picture Card control (xD_nCE, xD_CLE, xD_ALE, xD_nRE, xD_nWE, xD_nB/R), SD/MMC/MS multiplexed bus (SD_D[7:0], MS_D[7:0], SD_CMD, MS_BS), and dual downstream USB differential pairs (USBDN_DP2/DM2, USBDN_DP3/DM3), all configurable via PortSwap and PortMap registers.

Key Specifications

Pinout & Package

USB2640I-HZH-02-TR uses a 48-pin QFN (7 × 7 mm) with exposed ground pad requiring multiple vias to VSS. Pin functions are validated per Microchip DS00001948C, including dedicated xD-Picture Card interface signals not present on USB2641I.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB hub and flash media controller applications.

Compared with USB2640I-HZH-02-TR, USB2641I-HZH-02-TR removes xD support but retains identical industrial temp rating, combo socket capability, and PortSwap/PHYBoost features; USB2514B-AIZM offers more USB ports but adds system-level integration burden for flash media handling.

Availability

USB2640I-HZH-02-TR is available at Aetrix Electronics and suitable for industrial media kiosks, automotive GPS navigation systems, desktop front-panel hubs, and consumer A/V set-top boxes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for USB2640I-HZH-02-TR 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 leading provider of microcontroller, analog, FPGA, and connectivity solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The USB2640I-HZH-02-TR belongs to Microchip's USB Hub + Flash Media Controller product line, engineered for embedded host systems needing consolidated USB expansion and multi-format flash media access in space-constrained industrial designs.

FAQ

Does USB2640I-HZH-02-TR support xD-Picture Card, and how is it implemented?

Yes, USB2640I-HZH-02-TR fully supports xD-Picture Card 1.2 via dedicated pins (xD_nCE, xD_CLE, xD_ALE, xD_nRE, xD_nWE, xD_nB/R, xD_nCD) and internal firmware. This capability is exclusive to the USB2640I variant - USB2641I omits xD support. Implementation requires a licensed xD interface and compliant CRD_PWR-driven power delivery to meet xD voltage specifications.

What is the role of the CRD_PWR pin on USB2640I-HZH-02-TR?

The CRD_PWR pin on USB2640I-HZH-02-TR is a 3.3 V, 100–200 mA card power driver dedicated to powering the multiplexed flash media interface (xD, SD/MMC, MS). It is mandatory for xD-Picture Card operation to avoid violating xD voltage specs; for non-xD designs, it may serve as a GPIO. Its behavior is controlled by bits 0–3 of Register A5h.

Can USB2640I-HZH-02-TR operate with an external 24 MHz clock instead of a crystal?

Yes, USB2640I-HZH-02-TR supports an external 24 MHz clock applied to XTAL1 (CLKIN), provided the signal is 1.8 V logic level - a resistor divider is required if sourced from 3.3 V or 5 V. XTAL2 must be left open in this configuration. The on-chip crystal driver circuit remains unused, simplifying layout when a precision clock source is already available.

How does PortSwap functionality benefit PCB layout for USB2640I-HZH-02-TR?

PortSwap in USB2640I-HZH-02-TR allows programmable assignment of USB differential pairs (D+/D−) to any physical pin pair among USBDN_DP2/DM2 and USBDN_DP3/DM3. This eliminates trace crossing and enables direct routing from IC to USB connectors, improving signal integrity and reducing layer count - especially valuable in dense, cost-sensitive industrial PCBs.

Is USB2640I-HZH-02-TR compatible with USB Battery Charging (BC) 1.2 specification?

No, USB2640I-HZH-02-TR does not implement USB Battery Charging (BC) 1.2 detection logic. It supports standard USB 2.0 hub signaling only - including D+ pull-up for connect detection via VBUS_DET - but lacks dedicated BC 1.2 CDP/DCP/SDP identification circuitry or firmware. Charging negotiation must be handled externally if required.