Rainbow Electronics MAX3345E - Manual

General Description
The MAX3344E/MAX3345E USB transceivers convert
logic-level signals to USB signals, and USB signals to
logic-level signals. An internal 1.5kΩ USB pullup resistor
supports full-speed (12Mbps) USB operation. The
MAX3344E/MAX3345E provide built-in ±15kV ESD-pro-
tection circuitry on the USB I/O pins, D+ and D-, and V
CC
.
The MAX3344E/MAX3345E operate with logic supply
voltages as low as 1.65V, ensuring compatibility with
low-voltage ASICs. The suspend mode lowers supply
current to less than 40µA. An enumerate function allows
devices to logically disconnect while plugged in. The
MAX3344E/MAX3345E are fully compliant with USB
specification 1.1, and full-speed operation under USB
specification 2.0.
The MAX3344E/MAX3345E have a USB detect that mon-
itors the USB bus for insertion and signals this event. The
MAX3344E USB_DET threshold is between 3.6V (min)
and 4V (max), while the MAX3345E USB_DET threshold
is between 1V (min) and 2.8V (max).
The MAX3344E/MAX3345E are available in the miniature
4
✕ 4 UCSP™, as well as the small 16-pin TSSOP, and
are specified over the extended temperature range,
-40°C to +85°C.
Applications
Cell Phones
PC Peripherals
Information Appliances
Data Cradles
PDAs
MP3 Players
Digital Cameras
Features
♦ ±15kV ESD Protection On D+ and D-
♦ Comply with USB Specification 1.1 (Full Speed 2.0)
♦ Separate VP and VM Inputs/Outputs
♦ V
L Down to 1.65V Allows Connection with Low-
Voltage ASICs
♦ Enumerate Input—Allows USB Connection
through Software
♦ USB Detect Function
3.6V (min) to 4V (max)—MAX3344E
1V (min) to 2.8V (max)—MAX3345E
♦ Allow Single-Ended or Differential Logic I/O
♦ Internal Linear Regulator Allows Direct Powering
from the USB
♦ Internal Pullup Resistor for Full-Speed Operation
♦ Three-State Outputs
♦ No Power-Supply Sequencing Required
♦ Driver Active in Suspend Mode
♦ Available in Miniature Chip-Scale Package
MAX3344E/MAX3345E
±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-3171; Rev 0; 2/04
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.
PART TEMP RANGE PIN-PACKAGE
MAX3344E EUE -40°C to +85°C 16 TSSOP
MAX3344EEBE-T -40°C to +85°C 4 x 4 UCSP
MAX3345E EUE -40°C to +85°C 16 TSSOP
MAX3345EEBE-T -40°C to +85°C 4 x 4 UCSP
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
USB
INTERFACE
CONNECTOR
V L
RCV
VPI
VMI
SUSP
D+
D-
V BUS
D+
D-
GND
SYSTEM
SUPPLY
VOLTAGE
USB_DET
MODE
VTRM
ENUM
VPO
VMO
SYSTEM INTERFACE
V CC
OE
23.7Ω
23.7Ω
MAX3344E/
MAX3345E
GND
0.1µF
1µF
1µF
Typical Operating Circuit