XR22414
USB 2.0 4-Port MTT Hub
General Description
FEATURES
The XR22414 is a USB 2.0 4-port hub using multiple transaction
translators (MTT) for highest possible bandwidth capability.
ꢀ■
ꢀ■
ꢀ■
ꢀ■
USB 2.0 compliant interface
Multiple transaction translators (MTT)
Regulated +3.3V Output Power
Individual port and hub activity LED
indicators
Individual or ganged port power enables
Individual or global overcurrent sensing
Single 5V or 3.3V power supply
Single 12MHz Crystal
The upstream USB interface has an integrated USB 2.0 PHY and
device controller that is compliant with both Hi-Speed (480Mbps) and
Full-Speed (12Mbps) and downstream PHY supporting Hi-Speed,
Full-Speed and Low-Speed (1.5Mbps) on each of the 4 downstream
ports.
ꢀ■
ꢀ■
ꢀ■
ꢀ■
ꢀ■
The XR22414 provides two power modes, ganged or individual power
control as well as global or individual over-current sensing modes.
48-pin QFN and LQFP package options
APPLICATIONS
The XR22414 operates from a single 5V or 3.3V power input. When
powered by 5V, internal regulators provide a 3.3V output which may
be connected to VCC33 power input pins as well as external circuitry.
In turn a second internal regulator provides a 1.8V output from the
3.3V input. This 1.8V output may be connected to VCC18 power input
pins. Individual port activity and overall hub activity indicators provide
status outputs for external LEDs.
ꢀ■
USB port expansion
POS Terminals
Test Instrumentation
Factory Automation and Process Controls
ꢀ■
ꢀ■
ꢀ■
ꢀ■
Industrial Applications
Ordering Information - Back Page
Block Diagram
USB Host
Upstream Phy
XR22414
Hub Controller
Port Routing Switch
TT #1
TT #2
TT #3
TT #4
Downstream
Phy #2
Downstream
Phy #4
Downstream
Phy #3
Downstream
Phy #1
Device #1
Device #2
Device #3
Device #4
REV1A
1/13