19-2844; Rev 1; 8/03
±15kV ESD-Protected USB On-the-Go
Charge Pump and Comparators in UCSP
Features
o Guaranteed 8mA (min) VBUS Charge-Pump Output
o ±15kV ESD Protection on VBUS and ID_IN
o Up to +6.0V Backdrive Capability for VBUS
o +2.6V to +5.5V Operating Voltage Range
o VL Operates Down to +1.65V
o Guaranteed VBUS Input Impedance When Not
Driven
o Automatic CLOAD Detection
o Comparators for Host Negotiation Protocol
o ID_IN Detection
o Available in 4 x 3 UCSP or 14-Pin TSSOP Package
Ordering Information
TEMP RANGE
PINPACKAGE
TOP
MARK
MAX3355EEBC-T
-40°C to +85°C
4 x 3 UCSP
ABE
MAX3355EEUD
-40°C to +85°C
14 TSSOP
—
PART
Applications
Cell Phones
PDAs
Pin Configurations appear at end of data sheet.
MP3 Players
Digital Cameras
Functional Diagram
VCC C+ CVCC
LOGIC SUPPLY
+1.65V TO VCC
VL
CURRENT
SOURCE
MAX3355E
ESD
SHDN
STATUS1
STATUS2
DUAL-ROLE
ASIC
CHARGE
PUMP
VBUS
5V AT 8mA
LEVEL
SHIFTER
40kΩ TO
100kΩ
STATUS1
STATUS2
VBUS
COMPARATORS
GND
ID_IN
ID_OUT
ESD
USB
XCVR
VBUS
USB CONNECTOR
ON/OFF
OFFVBUS
GND
ID
D+
D-
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX3355E
General Description
The MAX3355E integrates a charge pump and comparators to enable a system with an integrated USB onthe-go (OTG) dual-role transceiver to function as a USB
OTG dual-role device. USB OTG facilitates the direct
connection of peripherals and mobile devices such as
PDAs, cellular phones, MP3 players, and digital cameras to one another without a host PC.
The MAX3355E’s internal charge pump supplies VBUS
power and signaling that is required by the transceiver as
defined in On-the-Go Supplement to the USB 2.0
Specification, Revision 1.0. The MAX3355E features ID
detection and internal comparators for monitoring
VBUS. The VBUS status outputs are used during negotiation for the USB according to the session request protocol (SRP) and host negotiation protocol (HNP).
The MAX3355E operates with logic supply voltages
(VL) as low as 1.65V, ensuring compatibility with lowvoltage ASICs. The device also features a logic-selectable 1µA shutdown mode.
The MAX3355E has built-in ±15kV ESD-protection circuitry to protect the VBUS and ID_IN pins. The device is
available in a miniature 4 x 3 chip-scale package
(UCSP), as well as a 14-pin TSSOP package, and is
specified for operation over the -40°C to +85°C extended
temperature range.