XR22414CL48EVB [EXAR]
USB 2.0 4-Port MTT Hub;
| 型号： | XR22414CL48EVB |
| 厂家： | 
EXAR CORPORATION |
| 描述： | USB 2.0 4-Port MTT Hub |
| 文件： | 总13页 (文件大小：565K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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.
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ꢀ■
ꢀ■
ꢀ■
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.
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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.
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USB port expansion
POS Terminals
Test Instrumentation
Factory Automation and Process Controls
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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
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XR22414
Absolute Maximum Ratings
Operating Conditions
Stresses beyond the limits listed below may cause
permanent damage to the device. Exposure to any Absolute
Maximum Rating condition may affect device reliability and
lifetime.
Operating temperature range ........................... 0°C to 70°C
V
V
supply voltage .........................................4.4V to 5.5V
CC5
supply voltage........................................3.0V to 3.6V
CC33
V
CC
V
CC
V
CC
5V supply voltage....................................... -0.5V to 6V
3.3V supply voltage.................................... -0.5V to 4V
1.8V supply voltage................................. -0.5V to 2.5V
Input voltage
(all pins except USBD+, USBD–) ................... -0.3V to 4.0V
Input voltage (USBD+ and USBD–) ............. -0.3V to 5.75V
Junction temperature................................................. 125°C
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XR22414
Electrical Characteristics
Unless otherwise noted: T = 0°C to 70°C; VCC5 = 4.4V to 5.25V or VCC33 = 3.0V to 3.6V.
A
Conditions
Symbol
Min
Typ
Max
2.5
Units
Upstream
Port Speed
Number of Active
Downstream Ports
Downstream Ports
Device Speed
Power Consumption DC Supply Current (VCC = VCC5
)
Suspend
None
0.5
39
45
54
49
59
67
54
91
0.5
27
32
42
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
1x Full Speed
1x High Speed
1
High Speed
2x Full Speed
2
1x Full Speed, 1x High Speed
2x High Speed
I
CC
4x Full Speed
4
4x High Speed
Suspend
2.5
None
Full Speed
1
4
1x Full Speed
4x Full Speed
Power Consumption DC Supply Current (VCC = VCC33
)
Suspend
None
0.4
39
46
54
49
58
66
53
90
0.4
26
32
42
2.5
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
1x Full Speed
1x High Speed
1
High Speed
2x Full Speed
2
1x Full Speed, 1x High Speed
2x High Speed
I
CC
4x Full Speed
4
4x High Speed
Suspend
2.5
None
Full Speed
1
4
1x Full Speed
4x Full Speed
REV1A
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XR22414
Electrical Characteristics (Continued)
Unless otherwise noted: T = 0°C to 70°C; V
= 4.4V to 5.25V or V = 3.0V to 3.6V.
CC33
A
CC5
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Non-USB I/O Pins
V
V
V
V
Input low voltage
-0.3
2.0
0.8
5.5
0.4
V
V
IL
Input high voltage
IH
Output low voltage
I
I
= 4mA
V
OL
OH
OL
OL
Output high voltage
Input low leakage current
Input high leakage current
Input pin capacitance
= -4mA
2.4
V
I
I
10
10
5
μA
μA
pF
IL
IH
C
IN
USB I/O Pins(1)
3.3V Regulated Power Output
3V3_OUT
Output voltage
Max load current 100mA
3.0
3.3
3.6
V
NOTE:
1. See USB 2.0 Specification for USB I/O pins DC Electrical Characteristics.
Pin Configuration
BUS_PWR#
1
2
3
4
5
36
35
34
33
32
31
30
29
28
27
26
25
OVC2#
PWR2#
VCC18
PWR3#
OVC3#
GND
36
35
34
33
32
31
30
29
28
27
26
25
OVC2#
1
BUS_PWR#
VBUS_SENSE
EXT_RST#
GND
VBUS_SENSE
EXT_RST#
GND
2
PWR2#
VCC18
PWR3#
OVC3#
GND
3
4
5
VCC33
VCC33
6
XR22414
UP_DP
XR22414
6
7
UP_DP
UP_DM
VCC18
7
OVC4#
PWR4#
VCC18
GND
UP_DM
VCC18
LQFP48
QFN48
OVC4#
PWR4#
VCC18
GND
8
8
9
REXT
9
REXT
10
11
12
VCC33
10
11
12
VCC33
XTALOUT
XTALIN
1V8_OUT
GND
1V8_OUT
GND
CPAD
XTALOUT
XTALIN
Top View, QFN48
Top View, LQFP48
REV1A
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XR22414
Pin Functions
Pin Number
1
Pin Name
Type Description
Downstream port 2 over current indicator, active low. If global over-current protection is selected by
connecting PWR4# to ground, this pin is unused and should be tied to ground.
OVC2#
I
Power enable for port 2 downstream device. Asserted if OVC2# input is asserted in individual power
mode or XR22414 is not configured. Unused when ganged power control mode is selected by
connecting PWR4# to ground.
2
3
4
PWR2#
VCC18
PWR3#
O
PWR 1.8V power input
Power enable for port 3 downstream device. Asserted if OVC3# input is asserted in individual power
O
mode or XR22414 is not configured. Unused when ganged power control mode is selected by
connecting PWR4# to ground.
Downstream port 3 over current indicator, active low. If global over-current protection is selected by
connecting PWR4# to ground, this pin is unused and should be tied to ground.
5
6
7
OVC3#
GND
I
Ground
Downstream port 4 over current indicator, active low. If global over-current protection is selected by
connecting PWR4# to ground, this pin is unused and should be tied to ground.
OVC4#
I
Power enable for port 4 downstream device. Asserted if OVC4# input is asserted in individual power
mode or XR22414 is not configured. If connected to ground, enables Ganged Power Control Mode and
Global Over-Current Protection mode.
8
PWR4#
I/O
9
VCC18
GND
PWR 1.8V power input
PWR Ground
10
11
XTALOUT
O
I
12MHz crystal feedback output
12MHz +/- 50 ppm crystal input with load capacitance rating of 16-20pF. An external 3.3V clock may be
used instead on on XTALIN leaving XTALOUT unconnected.
12
XTALIN
13
14
15
16
17
18
19
20
21
22
23
24
25
VCC33
DM4
DP4
PWR 3.3V power input
I/O
I/O
Downstream port 4 USB D- data
Downstream port 4 USB D+ data
GND
DM3
DP3
PWR Ground
I/O
I/O
Downstream port 3 USB D- data
Downstream port 3 USB D+ data
VCC33
DM2
DP2
PWR 3.3V power input
I/O
I/O
Downstream port 2 USB D- data
Downstream port 2 USB D+ data
GND
DM1
DP1
PWR Ground
I/O
I/O
Downstream port 1 USB D- data
Downstream port 1 USB D+ data
GND
PWR Ground
1.8V power output from internal 3.3V to 1.8V regulator, may be used to power VCC18 power inputs.
26
1V8_OUT
PWR
Must be decoupled with minimum of 10uF
27
28
29
30
31
VCC33
REXT
PWR 3.3V power input
I
External bias resistor. Connect 2.7kOhm 1% resistor from this pin to GND
VCC18
UP_DM
UP_DP
PWR 1.8V power input
I/O
I/O
Upstream port USB D- data
Upstream port USB D+ data
REV1A
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XR22414
Pin Number
Pin Name
Type Description
32
33
34
35
VCC33
GND
PWR 3.3V power input
PWR Ground
EXT_RST#
VBUS_SENSE
I
I
External reset input, active low. Must be asserted for a minimum of 10uS
Connect to VBUS from USB host. In self-powered mode, indicates presence of host VBUS power
Bus power indicator, active low. For bus powered mode, connect to ground. For self powered mode,
connect to logic ‘1’.
36
37
38
BUS_PWR#
REG_EN#
VCC5
I
I
Active low enable of internal 5V to 3.3V regulator. Connect to logic ‘1’ when XR22414 is powered by
3.3V.
5V power to internal 5V to 3.3V regulator. When XR22414 is powered by 3.3V, VCC5 should not be
connected to 5V, and REG_EN# should be tied to logic ‘1’.
PWR
3.3V power output from internal 5V to 3.3V regulator, may be used to power VCC33 power inputs if
39
3V3_OUT
PWR enabled by REG_EN# pin. Must be decoupled with minimum of 10 uF. Leave unconnected if XR22414
is powered by external 3.3V.
40
41
42
TEST
VCC33
I
Test mode enable. Tie to ground for normal device operation
PWR 3.3V power input
LED_CTL
I/O
I/O
LED hub active indicator. May also be used in conjunction with port status LEDs. Refer to Figure 4.
Port 1 LED Indicator. Max source current 3mA. May be used in conjunction with DRV pin. Refer to
Figure 4. Connecting LED1 to ground marks downstream port 1 as non-removable device.
43
44
45
46
LED1
LED2
LED3
LED4
Port 2 LED Indicator. Max source current 3mA. May be used in conjunction with DRV pin. Refer to
Figure 4. Connecting LED2 to ground marks downstream port 2 as non-removable device.
I/O
I/O
I/O
Port 3 LED Indicator. Max source current 3mA. May be used in conjunction with DRV pin. Refer to
Figure 4. Connecting LED3 to ground marks downstream port 3 as non-removable device.
Port 4 LED Indicator. Max source current 3mA. May be used in conjunction with DRV pin. Refer to
Figure 4. Connecting LED4 to ground marks downstream port 4 as non-removable device.
Power enable for port 1 downstream device in individual power mode. Asserted if OVC1# input is
asserted in individual or global power mode or XR22414 is not configured. Used as global power control
pin if ganged power control mode is selected by connecting PWR4# to ground..
47
PWR1#
O
I
Downstream port 1 over current indicator in individual current-sensing mode, active low. If PWR4# is
tied to ground, this pin is a global over-current sense input.
48
49
OVC1#
CPad
PWR Connect QFN package center pad to PCB ground plane with thermal vias.
NOTE:
Type: I = Input, O = Output, I/O = Input/Output, PWR = Power, OD = Open-Drain.
REV1A
6/13
XR22414
Functional Block Diagram
USB Host
XR22414
Upstream Phy
Upstream Port Controller
Hub
Activity
Indicator
Port
Indicators
LED
Controller
Hub
Controller
12
MHz
5V to 3.3V
Regulator
3.3V to 1.8V
Regulator
Oscillator
PLL (x40)
480
MHz
Power
Control
Overcurrent
Detection
Downstream Port Controller
Port Routing Switch
TT #1
TT #2
TT #3
TT #4
Downstream
Phy #2
Downstream
Phy #4
Downstream
Phy #1
Downstream
Phy #3
Device #1
Device #2
Device #3
Device #4
REV1A
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XR22414
Applications Information
Functional Description
The XR22414 hub has a multiple transaction translator architecture that provides one transaction translator (TT) for each
of the downstream USB ports. The transaction translators allow the USB 2.0 hub to take incoming high speed packets from
the USB host on the upstream port and translate these commands, if necessary to full or low speed devices on any of the
4 downstream ports. The MTT architecture allows for higher bandwidth as the 4 individual ports are not constrained by a
shared resource.
USB Interface
The hub function of the XR22414 supports one configuration and utilizes the following USB endpoints:
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Control endpoint
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Status change endpoint
The XR22414 hub may be configured for bus powered mode with a maximum power of 500mA or self-powered mode by
connecting the BUS_PWR# pin to the appropriate logic state. In bus powered mode, downstream ports are limited to low
power (100mA or less). When self-powered, downstream devices can draw up to 500mA on each of the four ports.
USB Vendor ID
Exar’s USB vendor ID is 0x04E2.
USB Product ID
Exar’s USB hub product ID is 0x0414.
Device Reset
The XR22414 has both an automatic power-up reset and an external hardware pin reset. Strapping option for ganged power
enables and global over-current sensing are selected by tying the PWR4# pin to logic ‘0’. This pin is sampled at device reset
and the resulting option selected is set.
USB Suspend
All USB peripheral devices must support the USB suspend mode in bus powered mode. Per USB standard, the XR22414
device will begin to enter the suspend state if it does not detect any activity, (including Start of Frame or SOF packets) on
its USB data lines for 3ms. The peripheral device must then reduce power consumption from VBUS power within the next 7
ms to the allowed limit of 2.5mA for the suspended state. Note that in this context, the “device” is all circuitry (including the
XR22414) that draws power from the host VBUS. Each attached downstream port is also allowed an additional 2.5mA of
suspend current. If no devices are connected to the XR22414 downstream ports, the USB host will suspend the hub.
Individual vs. Ganged Power Control and Global Over-current protection mode
Ganged power control mode is enabled when PWR4# is tied to ground. In this mode only the PWR1# output pin is used
for power control and the remaining PWR# pins are unused and should be left unconnected. Global over-current protection
mode is also enabled when PWR4# is tied to ground. In this mode only OVC1# input pin is used for current sensing and
the remaining OVC# pins should be connected to ground. Figure 1 depicts ganged power control / global over-current
protection. Figure 2 depicts individual mode power and over-current modes for ports 1 and 2 (repeat for ports 3 and 4).
Polymeric PTC
5V
2A
OVC1#
OVC2#
OVC3#
OVC4#
To VBUS
input of all
downstream
devices
XR22414
PWR1#
PWR2#
PWR3#
PWR4#
Figure 1: Ganged Power Control and Global Over-Current Protection Mode
REV1A
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XR22414
3.3V
5V
To VBUS of
Port 1
ENA
OUTA
IN
OVC1#
OVC2#
OVC3#
OVC4#
FLGA
FLGB
ENB
XRP2528
GND
To VBUS of
Port 2
OUTB
RSETB
RSETA
Duplicate for
Port 3 and 4
XR22414
PWR1#
PWR2#
PWR3#
PWR4#
Figure 2: Individual Power Control and Over-Current Protection Mode
USB Hub Drivers
All Operating Systems provide a native USB hub device driver for the XR22414 device to operate. No other device drivers
are necessary for the XR22414.
Regulated 3.3V Power Output
The XR22414 internal voltage regulator provides 3.3VDC output power when the device is powered by 5V input. The 3.3V
output can be utilized by other circuitry. Refer to Electrical Characteristics on page 3 for maximum power capability.
Downstream Port LED Indicators
Four port indicator (LED1 - LED4) pins, provide status of connection of downstream devices. Ports with permanently
connected devices should ground their respective port LED indicator. Ports using LED indicators may configure status LEDs
in a number of configurations in conjunction with the DRV pin. Figure 3 and Figure 4 show alternate configurations for LED
status indicators. Green / amber LEDs in Figure 4 are implemented per USB hub specification USB 2.0 spec, chapter 11.
LED1
Port 1 device is
non-removable
LED2
Port 2-4 devices are
removable but port LED
status is disabled
LED3
LED4
DRV
XR22414
Port status LED
indicators disabled
Figure 3: Port status LED indicators disabled
REV1A
9/13
XR22414
Port 1 enabled but does not use port status indicator
Green
LED1
LED2
LED3
LED4
DRV
Port 2 and 4 devices
470
are removable
with Green/Amber
LED indicators
per USB hub
Amber
Green
XR22414
specification
470
Amber
470
Hub active indicator (optional)
Green
Figure 4: Port status LED indicators enabled dual LED mode
REV1A
10/13
XR22414
Mechanical Dimensions
QFN-48
TOP VIEW
BOTTOM VIEW
SIDE VIEW
TERMINAL DETAILS
TYPICAL RECOMMENDED LAND PATTERN
1. All dimensions are in Millimeters
2. Dimensions and tolerance per Jedec MO-220
Drawing No.: POD-00000101
Revision: B
REV1A
11/13
XR22414
Mechanical Dimensions
LQFP-48
TOP VIEW
DETAIL A
SIDE VIEW
TERMINAL DIMENSION
TYPICAL RECOMMENDED LAND PATTERN
- Control dimensions are in Millimeters
- Jedec MS 026
Drawing No. : POD - 00000096
Revision: A
REV1A
12/13
XR22414
Ordering Information(1)
Part Number
XR22414CL48TR-F
XR22414CV48TR-F
XR22414CL48EVB
XR22414CV48EVB
Operating Temperature Range
Lead-Free
Yes(2)
Package
48-pin QFN
48-pin LQFP
Packaging Method
0°C to +70°C
0°C to +70°C
Reel
Reel
XR22414 48-pin QFN Evaluation Board
XR22414 48-pin LQFP Evaluation Board
NOTE:
1. Refer to www.exar.com/XR22414 for most up-to-date Ordering Information.
2. Visit www.exar.com for additional information on Environmental Rating.
Revision History
Revision
1A
Date
Description
February 2017
Initial Release
www.exar.com
48720 Kato Road
Fremont, CA 94538
USA
Tel.: +1 (510) 668-7000
Fax: +1 (510) 668-7001
Email: uarttechsupport@exar.com
Exar Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. Exar Corporation conveys
no license under any patent or other right and makes no representation that the circuits are free of patent infringement. While the information in this publication has been
carefully checked, no responsibility, however, is assumed for inaccuracies.
Exar Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected
to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Exar Corporation
receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of
Exar Corporation is adequately protected under the circumstances.
Reproduction, in part or whole, without the prior written consent of Exar Corporation is prohibited. Exar, XR and the XR logo are registered trademarks of Exar Corporation.
All other trademarks are the property of their respective owners.
©2016-2017 Exar Corporation
XR22414_DS_xxxx17
REV1A
13/13
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