19-3172; Rev 0; 2/04
±±15k EꢀDꢁ-rotected UꢀB Transceiver
in UCꢀ-
General Description
Features
The MAX3346E bidirectional transceiver converts logic-
level signals to USB signals, and USB signals to logic-
level signals. The MAX3346E includes the 1.5kΩ USB
pullup resistor internally, and supports both full-speed
(12Mbps) and low-speed (1.5Mbps) USB operation.
The device has built-in 15kꢀ ESꢁ protection circuitry
to guard the USB I/O pins, ꢁ+ and ꢁ-.
♦ ±15kV ESD Protection on D+ and D-
♦ Internal Linear Regulator Allows Direct Powering
from the USB Cable
♦ Internal 1.5kΩ Pullup Resistor for Low/Full-Speed
Operation
♦ Supports Low-Speed and Full-Speed USB
Communications
The MAX3346E operates with ꢀ voltages as low as
L
1.65ꢀ, ensuring compatibility with low-voltage ASICs.
The device features a logic-selectable suspend mode
that lowers current draw to less than 40µA. The
MAX3346E has an enumerate function that allows
devices to logically disconnect while plugged in. The
MAX3346E is fully compliant with USB specification 1.1,
and the full-speed and low-speed operation under USB
specification 2.0.
♦ Complies with USB Specification Revision 1.1 and
2.0 (Low Speed and Full Speed)
♦ Three-State Outputs
♦ Enumerate Input—Allows USB Connection
through Software
♦ No Power-Supply Sequencing Required
♦ Operates with V of 1.65V to 3.6V, Ensuring
L
The MAX3346E is available in the miniature 4 x 4 chip-
Compatibility with Low-Voltage ASICs
TM
scale package (UCSP ), as well as the small 14-pin
♦ Available in Miniature Chip-Scale Package
TSSOP, and is rated for the -40°C to +85°C extended
temperature range.
Applications
Ordering Information
Cell Phones
PC Peripherals
ꢁata Cradles
PꢁAs
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
14 TSSOP
MAX3346EEUꢁ
MAX3346EEBE-T
4 x 4 UCSP
MP3 Players
UCSP is trademark of Maxim Integrated Products, Inc.
-in Configurations
BOTTOM VIEW
1
2
3
4
TOP VIEW
RCV
VP
1
2
3
4
5
6
7
14 V
L
MAX3346E
13 VTRM
12 D+
D
C
B
VP
RCV
V
VTRM
D+
L
MODE
VM
11 D-
MAX3346E
VM
MODE
OE
10 GND
OE
SUSP
D-
ENUM
SUSP
9
8
V
CC
A
SPEED
ENUM SPEED
V
CC
GND
TSSOP
UCSP
________________________________________________________________ Maxim Integrated Products
1
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.