MAX13345E Maxim Integrated Products, MAX13345E Datasheet - Page 8

• Manufacturer Part Number: MAX13345E
• Description: (MAX13342E / MAX13345E) 3-Wire Interface Full Speed USB Transceivers
• Manufacturer: Maxim Integrated Products

The MAX13342E/MAX13345E USB-compliant trans-
ceivers are designed to minimize the area and external
components required to interface low-voltage ASICs to
USB. The devices comply with the USB 2.0 specifica-
tion for full-speed (12Mbps) operation. The transceivers
include an internal 3.3V regulator, an internal 1.5kΩ D+
pullup resistor, and built-in ±15kV (HBM) ESD protec-
tion circuitry to protect D+, D-. Figure 1 is the
MAX13342E/MAX13345E functional diagram.
The MAX13342E has controlled output impedance of
12Ω (max) on D+/D-, allowing the use of external
switches to multiplex two different USB devices onto a
single USB connector.
3-Wire Interface Full-Speed USB Transceivers
With/Without Internal Series Resistors
Figure 1. MAX13342E/MAX13345E Functional Diagram
8
_______________________________________________________________________________________
ENUM
SEO
DAT
SUS
BD
OE
V
Detailed Description
L
TRANSLATOR
AND LOGIC
LEVEL
MAX13342E
MAX13345E
The MAX13345E uses internal series resistors on D+/D-
to allow direct interface to the USB connector. A low-
power mode reduces current consumption to less than
45µA. An enumerate function controls connection of the
internal D+ pullup resistor.
The MAX13342E/MAX13345E are equipped with DAT
and SE0 interface signals and support the 3-wire USB
tranceiver interface. Although the 3-wire interface is
commonly associated with USB On-the-Go trans-
ceivers, the MAX13342E/MAX13345E support USB
peripherals only. These transceivers provide a USB
V
USB V
REGULATOR
BUS
LDO
detection function that monitors the presence of
BUS
and signals the event.
MAX13345E
D+
D-
V
V
BUS
TRM