Freescale Semiconductor
Advance Information
Document Number: MC34825
Rev 2.0, 3/2010
Micro-USB Interface IC
Supporting Universal Charging
Solution and Wired Accessories
34825
The 34825 is designed to support the Universal Charging Solution
INTERFACE IC
(UCS) recommended by the OMTP (Open Mobile Terminal Platform),
as well as to use the same 5-pin micro or mini-USB connector for other
wired accessories. The 34825 supports various types of external power
supplies, such as a dedicated ac/dc adapter or a USB port, to charge
the battery. It has functions built in to identify the type of the power
supply, and sets low or high charging current, based on the current
capability of the power supply. The 34825 monitors the power supply,
and offers an up to 28 V of over-voltage protection (OVP) to the cell
phone against failed power supplies. The 34825 also contains analog
(PB-FREE)
switches to multiplex the 5 pins, to support UART and high speed USB
98ASA00037D
20-PIN QFN
data communication, mono or stereo audio headset with or without a
microphone and a cord remote controller, manufacturing or research-
and-development (R/D) test cables, and other accessories.
ORDERING INFORMATION
The 34825 monitors both the VBUS status and the resistance
between the ID pin and the ground to identify the accessory being
Temperature
Device
Package
Range (T
A
)
plugged into the mini or micro-USB connector. A high-accuracy 5-bit
ADC is offered to distinguish 32 levels of ID resistance that are
3mm X 3mm
MC34825EP/R2
-40°C to 85°C
assigned to buttons in a cord remote controller or to identification (ID)
UTQFN
resistors of accessories. After identifying the attached accessory, the
34825 sends an interrupt signal to a host IC and the host IC can
configure the analog switches via an I
2
C serial bus for further actions.
When the accessory is detached from the cell phone, an interrupt signal
is also sent to inform the host.
Features
• Identifies various types of power supplies to set low or high
• Supports 32 ID resistance values with a high accuracy 5-
battery-charging-current levels
bit ADC
• Internal power switch to offer OVP against up to 28 V
• Accessory attachment and detachment detection with an
failed power supply input
interrupt signal to the host IC
• Supports stereo/mono headset with or without microphone
• I
2
C interface
and remote controller with pure passive components
• 10
μA
quiescent current in Standby mode
• Supports USB or UART R/D test cables
• Pb-free packaging designated by suffix code EP
• High speed (480 Mbps) USB 2.0 compliant
Baseband
GPIO
I2C
UART
USB XCVR
AUDIO
34825
VDDIO
INT
I2C_SDA
I2C_SCL
RXD
TXD
D+
D-
SPK_L
SPK_R
MIC
VDD
LI+
Charger
ISET
OUT
VBUS
ID
DP
DM
GND
V
BUS
ID
D+
D-
GND
USB Connector
Figure 1. 34825 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2010. All rights reserved.
PIN CONNECTIONS
PIN CONNECTIONS
VBUS
17
20
19
18
16
TRANSPARENT
TOP VIEW
SPK_R
SPK_L
MIC
D+
D-
ISET
DM
DP
ID
1
2
3
4
5
15
14
OUT
I
2
C_SCL
I
2
C_SDA
INT
VDD
21
GND
13
12
11
6
7
8
9
10
VDDIO
TXD
NC
Figure 3. 34825 Pin Connections
Table 1. 34825 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section on
page 13.
Pin Number
1
2
3
4
5
6
7
8
9
Pin Name
SPK_R
SPK_L
MIC
D+
D-
RXD
TXD
NC
VDDIO
Pin Function
Input
Input
Output
IO
IO
Output
Input
No Connection
Input
Formal Name
Speaker right channel
Speaker left channel
Microphone output
D+ of the USB
transceiver
D- of the USB
transceiver
UART receiver
UART transmitter
No Connection
IO power supply
Definition
Right channel input for speaker signals
Left channel input for speaker signals
Microphone output to the baseband of the cell phone system
D+ line of the USB transceiver
D- line of the USB transceiver
Receive line of the UART
Transmit line of the UART
No Connection
IO supply voltage. The VDDIO voltage is used as the reference voltage
for the I
2
C bus signals. This pin also functions as a hardware reset to
the IC.
No Connection
IC power supply input
Open-drain interrupt output
Data line of the I
2
C interface
Clock line of the I
2
C interface
The output of the power MOSFET pass switch
Open-drain output to set the charger current
VBUS line of the Mini or micro-USB connector
10
11
12
13
14
15
16
17
NC
VDD
INT
I
2
C_SDA
I
2
C_SCL
OUT
ISET
VBUS
No Connection
Input
Output
IO
Input
Output
Output
Input
No Connection
Power supply
Interrupt output
I
2
C data
I
2
C clock
Power output
Charge current setting
VBUS power supply
RXD
NC
34825
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 2. Maximum Ratings
Exceeding these ratings may cause a malfunction or permanent damage to the device.
Ratings
ELECTRICAL RATINGS
Input Voltage Range
VBUS Pin
OUT Pin
SPK_L, SPK_R, DP, and DM Pins
All Other Pins
ESD Voltage
(1)
Human Body Model (HBM) for VBUS, DP, DM, ID Pins
Human Body Model (HBM) for all other pins
Machine Model (MM)
THERMAL RATINGS
Operating Temperature
Ambient
Junction
Storage Temperature
Thermal Resistance
(2)
Junction-to-Case
Junction-to-Ambient
Peak Package Reflow Temperature During Reflow
(3)
,
(4)
R
θJC
R
θJA
T
PPRT
6.0
45
Note 4
°C
T
A
T
J
T
STG
-40 to +85
150
-65 to +150
°C
°C/W
°C
V
ESD
±8000
±2000
±200
V
BUS
V
OUT
-0.3 to 28
-0.3 to 8.0
-2.0 to V
DD
+0.3
-0.3 to 5.5
V
V
Symbol
Value
Unit
Notes
1. ESD testing is performed in accordance with the Human Body Model (HBM) (C
ZAP
= 100 pF, R
ZAP
= 1500
Ω),
and the Machine Model
(MM) (C
ZAP
= 200 pF, R
ZAP
= 0
Ω).
2.
3.
4.
Device mounted on the Freescale EVB test board per JEDEC DESD51-2.
Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may
cause malfunction or permanent damage to the device.
Freescale’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow
Temperature and Moisture Sensitivity Levels (MSL), go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes and
enter the core ID to view all orderable parts (i.e. MC33xxxD enter 33xxx)], and review parametrics.
34825
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
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