MAX3349E Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Hi-Speed USB 2.0 Full-Speed Transceiver with UART Multiplexing Mode

19-3952; Rev 1; 5/11
Hi-Speed USB 2.0 Full-Speed Transceiver
with UART Multiplexing Mode
General Description
The MAX3349E ±15kV ESD-protected, USB transceiver
provides a full-speed USB interface to a lower voltage
microprocessor or ASIC. The device supports enumer-
ation, suspend, and VBUS detection. A special UART
multiplexing mode routes external UART signals (Rx
and Tx) to D+ and D-, allowing the use of a shared con-
nector to reduce cost and part count for mobile
devices.
The UART interface allows mobile devices such as
PDAs, cellular phones, and digital cameras to use either
UART or USB signaling through the same connector.
The MAX3349E features a separate UART voltage sup-
ply input to support legacy devices using +2.75V signal-
ing. The MAX3349E supports a maximum UART baud
rate of 921kbaud.
Upon connection to a USB host, the MAX3349E enters
USB mode and provides a full-speed USB 2.0-compliant
interface through VP, VM, RCV, and OE. The MAX3349E
features internal series termination resistors on D+ and
D-, and an internal 1.5kΩ pullup resistor to D+ to allow
the device to logically connect and disconnect from the
USB while plugged in. A suspend mode is provided for
low-power operation. D+ and D- are protected from
electrostatic discharge (ESD) up to ±15kV.
The MAX3349E is available in 16-pin TQFN (4mm x
4mm) and 16-bump UCSP™ (2mm x 2mm) packages,
and is specified over the -40°C to +85°C extended tem-
perature range.
Applications
Cell Phones
PDAs
Digital Cameras
MP3 Players
Features
♦ ±15kV ESD HBM Protection on D+ and D-
♦ UART Mode Routes External UART Signals to
D+/D-
♦ Internal Linear Regulator Allows Direct Powering
from the USB Cable
♦ Separate Voltage Input for UART
Transmitter/Receiver (V_UART)
♦ Internal 1.5kΩ Pullup Resistor on D+ Controlled
by Enumerate Input
♦ Internal Series Termination Resistors on D+ and D-
♦ Complies with USB Specification Revision 2.0,
Full-Speed 12Mbps Operation
♦ Built-In Level Shifting Down to +1.4V, Ensuring
Compatibility with Low-Voltage ASICs
♦ V_BUS Detection
♦ Combined VP and VM Inputs/Outputs
♦ No Power-Supply Sequencing Required
♦ Available in 16-Bump UCSP (2mm x 2mm)
Package
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3349EEBE-T
-40°C to +85°C 16 UCSP
MAX3349EEBE+T -40°C to +85°C 16 UCSP
MAX3349EETE*
-40°C to +85°C 16 TQFN-EP**
*Future product—contact factory for availability.
T = Tape and reel.
+Denotes a lead(Pb)-free/RoHS-compliant package.
**EP = Exposed pad.
Pin Configurations
TOP VIEW
12
11
10
9
TOP VIEW
(BUMPS ON BOTTOM OF DIE)
1
2
3
4
+
MAX3349E
ENUM 13
*EP
8 SUS
A
VUART
RX
TX
BD
VTRM ₁₄
VL 15
MAX3349E
VM 16
+
1
2
3
4
TQFN-EP
(4mm x 4mm)
*CONNECT TO GND OR LEAVE UNCONNECTED.
7 OE
6 RCV
5 VP
B
VL
VM
VP
RCV
C
VTRM
ENUM
SUS
OE
D
VBUS
D+
D-
GND
UCSP
(2mm x 2mm)
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.