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USB2503 데이터시트 PDF




Microchip에서 제조한 전자 부품 USB2503은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 USB2503 자료 제공

부품번호 USB2503 기능
기능 Integrated USB 2.0 Compatible 3-Port Hub
제조업체 Microchip
로고 Microchip 로고


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USB2503 데이터시트, 핀배열, 회로
USB2503/USB2503A
Integrated USB 2.0 Compatible 3-Port Hub
Highlights
• Integrated USB 2.0 Compatible 3-Port Hub
- 3 Transaction Translators for highest perfor-
mance
- High-Speed (480Mbits/s), Full-Speed
(12Mbits/s) and Low-Speed (1.5Mbits/s)
compatible
- Full power management with per port or
ganged, selectable power control
- Detects Bus-Power/Self-Power source and
changes mode automatically
• Complete USB Specification 2.0 Compatibility
- Includes USB 2.0 Transceivers
• VID/PID/DID, and Port Configuration for Hub via:
- Single Serial I2C EEPROM
- SMBus Slave Port
• Default VID/PID/DID, allows functionality when
configuration EEPROM is absent
• Hardware Strapping options allow for configura-
tion without an external EEPROM or SMBus Host
• On-Board 24MHz Crystal Driver Circuit or 24 MHz
external clock driver
• Internal PLL for 480MHz USB 2.0 Sampling
• Internal 1.8V Linear Voltage Regulator
• Integrated USB termination and Pull-up/Pull-down
resistors
• Internal Short Circuit protection of USB differential
signal pins
• 1.8 Volt Low Power Core Operation
• 3.3 Volt I/O with 5V Input Tolerance
• 48-Pin QFN RoHS compliant package
2007 - 2016 Microchip Technology Inc.
DS000002249A-page 1




USB2503 pdf, 반도체, 판매, 대치품
USB2503/USB2503A
1.0 INTRODUCTION
The Microchip 3-Port Hub is fully compliant with the USB 2.0 Specification and will attach to a USB host as a Full-Speed
Hub or as a Full-/High-Speed Hub. The 3-Port Hub supports Low-Speed, Full-Speed, and High-Speed (if operating as
a High-Speed Hub) downstream devices on all of the enabled downstream ports.
A dedicated Transaction Translator (TT) is available for each downstream facing port. This architecture ensures maxi-
mum USB throughput for each connected device when operating with mixed-speed peripherals.
The Hub works with an external USB power distribution switch device to control VBUS switching to downstream ports,
and to limit current and sense over-current conditions.
All required resistors on the USB ports are integrated into the Hub. This includes all series termination resistors on D+
and D– pins and all required pull-down and pull-up resistors on D+ and D– pins. The over-current sense inputs for the
downstream facing ports have internal pull-up resistors.
Throughout this document the upstream facing port of the hub will be referred to as the upstream port, and the down-
stream facing ports will be called the downstream ports.
1.1 OEM Selectable Features
A default configuration is available in the USB2503/USB2503A following a reset. This configuration may be sufficient
for some applications. Strapping option pins make it possible to modify a limited sub-set of the configuration options.
The USB2503/USB2503A may also be configured by an external EEPROM or a microcontroller. When using the micro-
controller interface, the Hub appears as an SMBus slave device. If the Hub is pin-strapped for external EEPROM con-
figuration but no external EEPROM is present, then a value of ‘0’ will be written to all configuration data bit fields (the
hub will attach to the host with all ‘0’ values).
The 3-Port Hub supports several OEM selectable features:
• Operation as a Self-Powered USB Hub or as a Bus-Powered USB Hub.
• Operation as a Dynamic-Powered Hub (Hub operates as a Bus-Powered device if a local power source is not
available and switches to Self-Powered operation when a local power source is available).
• Multiple Transaction Translator (Multi-TT) or Single-TT support.
• Optional OEM configuration via I2C EEPROM or via the industry standard SMBus interface from an external
SMBus Host.
• Port power switching on an individual or ganged basis.
• Port over-current monitoring on an individual or ganged basis.
• Compound device support (port is permanently hardwired to a downstream USB peripheral device).
• Hardware strapping options enable configuration of the following features.
- Non-Removable Ports
- Port Power Polarity (active high or active low logic)
- Port Disable
- Ganged Vs Port power switching and over-current sensing
DS000002249A-page 4
2007 - 2016 Microchip Technology Inc.

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USB2503 전자부품, 판매, 대치품
USB2503/USB2503A
4.0 3-PORT HUB BLOCK DIAGRAM
FIGURE 4-1:
3-PORT BLOCK DIAGRAM
Upstream Upstream 24 MHz
USB Data VBUS Crystal
3.3V
To
Pin EEPROM
1.8V Strapping or SMBus
Cap Options Master
SD SCL
VBUS
Upstream Power
PLL
1.8V
Reg.
PHY
Detect
Internal
Defaults
Select
Serial
Interface
Repeater
SIE Controller
TT TT TT
#1 #2 #3
Port
Controller
Routing Logic
...Port #1
Downstream OC Sense
Port #3
Downstream OC Sense
PHY #1 Switch Driver
PHY #3 Switch Driver
LED Drivers
LED Drivers
Downstream OC Switch/LED
USB Data Sense Drivers
Downstream OC Switch/LED
USB Data Sense Drivers
2007 - 2016 Microchip Technology Inc.
DS000002249A-page 7

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