Harman Kardon AVR 171S (serv.man2) Service Manual ▷ View online
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720/LAN8720i
13
Revision 1.0 (05-28-09)
DATASHEET
Table 2.1 LAN8720/LAN8720i 24-PIN QFN Pinout
PIN NO.
PIN NAME
PIN NO.
PIN NAME
1
VDD2A
13
MDC
2
LED2/nINTSEL
14
nINT/REFCLKO
3
LED1/REGOFF
15
nRST
4
XTAL2
16
TXEN
5
XTAL1/CLKIN
17
TXD0
6
VDDCR
18
TXD1
7
RXD1/MODE1
19
VDD1A
8
RXD0/MODE0
20
TXN
9
VDDIO
21
TXP
10
RXER/PHYAD0
22
RXN
11
CRS_DV/MODE2
23
RXP
12
MDIO
24
RBIAS
Harman Kardon
AVR 171 Service Manual
Page 77 of 174
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Revision 1.0 (05-28-09)
14
SMSC LAN8720/LAN8720i
DATASHEET
Chapter 3 Pin Description
This chapter describes the signals on each pin. When a lower case “n” is used at the beginning of the
signal name, it indicates that the signal is active low. For example, nRST indicates that the reset signal
is active low. The buffer type for each signal is indicated in the TYPE column, and a description of the
buffer types is provided in
signal name, it indicates that the signal is active low. For example, nRST indicates that the reset signal
is active low. The buffer type for each signal is indicated in the TYPE column, and a description of the
buffer types is provided in
Table 3.1
.
Note 3.1
Unless otherwise noted in the pin description, internal pull-up and pull-down resistors are
always enabled. The internal pull-up and pull-down resistors prevent unconnected inputs
from floating, and must not be relied upon to drive signals external to
always enabled. The internal pull-up and pull-down resistors prevent unconnected inputs
from floating, and must not be relied upon to drive signals external to
LAN8720/LAN8720i
.
When connected to a load that must be pulled high or low, an external resistor must be
added.
added.
Note: The digital signals are not 5V tolerant.They are variable voltage from +1.6V to +3.6V, as shown
in
Table 7.1
.
Table 3.1 Buffer Types
BUFFER TYPE
DESCRIPTION
I8
Input.
O8
Output with 8mA sink and 8mA source.
IOD8
Input/Open-drain output with 8mA sink.
IPU
Note 3.1
Input with 67k (typical) internal pull-up.
IPD
Note 3.1
Input with 67k (typical) internal pull-down.
IOPU
Note 3.1
Input/Output with 67k (typical) internal pull-up. Output has 8mA sink and 8mA source.
IOPD
Note 3.1
Input/Output with 67k (typical) internal pull-down. Output has 8mA sink and 8mA source.
AI
Analog input
AIO
Analog bi-directional
ICLK
Crystal oscillator input pin
OCLK
Crystal oscillator output pin
P
Power pin
Harman Kardon
AVR 171 Service Manual
Page 78 of 174
1
ISL54220
High-Speed USB 2.0 (480Mbps)
Multiplexer
ISL54220
The Intersil ISL54220 is a single supply dual 2:1
multiplexer that can operate from a single 2.7V to 5.5V
supply. It contains two SPDT (Single Pole/Double
Throw) switches configured as a DPDT. The part was
designed for switching or routing of USB High-Speed
signals and/or USB Full-speed signals in portable
battery powered products.
The 6Ω
multiplexer that can operate from a single 2.7V to 5.5V
supply. It contains two SPDT (Single Pole/Double
Throw) switches configured as a DPDT. The part was
designed for switching or routing of USB High-Speed
signals and/or USB Full-speed signals in portable
battery powered products.
The 6Ω
switches can swing rail-to-rail and were
specifically designed to pass USB full speed data signals
that range from 0V to 3.3V and USB high speed data
signals that range from 0V to 400mV. They have high
bandwidth and low capacitance to pass USB high-speed
data signals with minimal distortion.
The digital logic inputs are 1.8V logic compatible when
operated with a 2.7V to 3.6V supply. The ISL54220 has
an output enable pin to open all the switches.
The ISL54220 is available in 10 Ld 1.8mmx1.4mm
µTQFN, 10 Ld TDFN and 10 Ld MSOP packages. It
operates over a temperature range of -40 to +85°C.
that range from 0V to 3.3V and USB high speed data
signals that range from 0V to 400mV. They have high
bandwidth and low capacitance to pass USB high-speed
data signals with minimal distortion.
The digital logic inputs are 1.8V logic compatible when
operated with a 2.7V to 3.6V supply. The ISL54220 has
an output enable pin to open all the switches.
The ISL54220 is available in 10 Ld 1.8mmx1.4mm
µTQFN, 10 Ld TDFN and 10 Ld MSOP packages. It
operates over a temperature range of -40 to +85°C.
Related Literature
• Technical Brief
TB363
“Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
(SMDs)”
• Application Note
AN1449
“ISL54220IRUEVAL1Z
Evaluation Board User’s Manual”
Features
• High-Speed (480Mbps) and Full-Speed (12Mbps)
Signaling Capability per USB 2.0
• 1.8V Logic Compatible (2.7V to +3.6V supply)
• Enable Pin to Open all Switches
• Power OFF Protection
• D-/D+ Pins Overvoltage Tolerant to 5.5V
• -3dB Frequency . . . . . . . . . . . . . . . . . . 742MHz
• Low ON Capacitance @ 240MHz . . . . . . . . . 4.2pF
• Low ON-Resistance @ VDD = 5.5V . . . . . . . 4.5Ω
• Low ON-Resistance @ VDD = 3.3V . . . . . . . 6.0Ω
• Single Supply Operation (V
• Enable Pin to Open all Switches
• Power OFF Protection
• D-/D+ Pins Overvoltage Tolerant to 5.5V
• -3dB Frequency . . . . . . . . . . . . . . . . . . 742MHz
• Low ON Capacitance @ 240MHz . . . . . . . . . 4.2pF
• Low ON-Resistance @ VDD = 5.5V . . . . . . . 4.5Ω
• Low ON-Resistance @ VDD = 3.3V . . . . . . . 6.0Ω
• Single Supply Operation (V
DD
) . . . . . 2.7V to 5.5V
• Available in µTQFN, TDFN, and MSOP Packages
• Pb-Free (RoHS Compliant)
• Compliant with USB 2.0 Short Circuit and
• Pb-Free (RoHS Compliant)
• Compliant with USB 2.0 Short Circuit and
Overvoltage Requirements Without Additional
External Components
External Components
Applications*
(see page 15)
• MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• Digital Cameras and Camcorders
• USB Switching
• Cellular/Mobile Phones
• PDA’s
• Digital Cameras and Camcorders
• USB Switching
Application Block Diagram
USB 2.0 HS Eye Pattern With
Switches In The Signal Path
ISL54220
USB
TRANSCEIVER
HIGH-SPEED
US
B CON
N
ECTOR
D-
D+
SEL
GND
HSD1-
HSD1+
HSD2-
HSD2+
V
DD
OE
LOGIC
µCONTROLLER
USB
TRANSCEIVER
FULL-SPEED
VBUS
D-
D+
GND
OR
FULL-SPEED
HIGH_SPEED
OR
PORTABLE MEDIA DEVICE
VOL
T
AGE
SCALE
(0.1
V/D
IV)
TIME SCALE (0.2ns/DIV)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2008, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
February 4, 2010
FN6819.1
FN6819.1
Harman Kardon
AVR 171 Service Manual
Page 79 of 174
2
FN6819.1
February 4, 2010
Pin Configurations
ISL54220
(10 LD 3.0X3.0 TDFN)
TOP VIEW
ISL54220
(10 LD MSOP)
TOP VIEW
ISL54220
(10 LD 1.8X1.4 µTQFN)
TOP VIEW
NOTE:
1. Switches Shown for SEL = Logic “1” and OE = Logic “0”.
SEL
HSD1+
D+
HSD2+
HSD1-
GND
1
2
3
4
5
10
9
8
7
6 D-
HSD2-
VDD
OE
LOGIC
CONTROL
PD
SEL
HSD1+
D+
HSD2+
HSD1-
GND
1
2
3
4
5
10
9
8
7
6 D-
HSD2-
VDD
OE
LOGIC
CONTROL
8
10
D-
OE
D+
VDD 9
7
2
3
4
GND
HSD1+ HSD2+
5
SEL
LOGIC
CO
N
T
R
O
L
1
6
HSD1- HSD2-
Truth Table
OE
SEL
HSD1-, HSD1+
HSD2-, HSD2+
0
0
ON
OFF
0
1
OFF
ON
1
X
OFF
OFF
Logic “0” when ≤ 0.5V, Logic “1” when ≥ 1.4V with a 2.7V to
3.6V Supply.
3.6V Supply.
Pin Descriptions
TDFN
MSOP µTQFN NAME
FUNCTION
10
10
9
VDD
Power Supply (2.7V to
5.5V)
5.5V)
1
1
10
SEL
Select Logic Control
Input
Input
2
2
1
HSD1+ USB Data Port (Channel
1 Positive Input)
3
3
2
HSD2+ USB Data Port (Channel
2 Positive Input)
4
4
3
D+
USB Data Common
Positive Port
Positive Port
5
5
4
GND
Ground Connection
6
6
5
D-
USB Data Common
Negative Port
Negative Port
7
7
6
HSD2- USB Data Port (Channel
2 Negative Input)
8
8
7
HSD1- USB Data Port (Channel
1 Negative Input)
9
9
8
OE
Bus Switch Enable
PD
-
-
PD
Thermal Pad. Tie to
Ground or Float
Ground or Float
ISL54220
Harman Kardon
AVR 171 Service Manual
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