MAX3344EEVKIT# Maxim Integrated, MAX3344EEVKIT# Datasheet - Page 8

• Manufacturer Part Number: MAX3344EEVKIT#
• Description: USB Interface IC 15kV ESD-Protected USB Transceivers in UCSP with USB Detect
• Manufacturer: Maxim Integrated

Specifications of MAX3344EEVKIT#

• Operating Supply Voltage: 3.3 V
• Operating Supply Current: 10 mA

±15kV ESD-Protected USB Transceivers
in UCSP with USB Detect
The MAX3344E/MAX3345E system-side outputs are
VPI, VMI, and RCV. The MAX3344E/MAX3345E send
data through VPI, VMI, and RCV. VPI and VMI are out-
puts to the single-ended receivers and RCV is the out-
put of the differential receiver.
Output enable (OE) controls data transmission. Drive OE
low to enable data transmission on D+ and D-. Drive OE
high to disable data transmission or receive data.
MODE is a control input that selects whether differential
or single-ended logic signals are recognized by the
system side of the MAX3344E/MAX3345E. Drive MODE
high to select differential mode with VPO as the positive
terminal and VMO as the negative terminal. Drive
MODE low to select single-ended mode with VPO as
the data input (Table 3).
VTRM is the 3.3V output of the internal linear voltage
regulator. VTRM powers the internal circuitry of the USB
side of the MAX3344E/MAX3345E. Connect a 1µF (min)
low-ESR ceramic or plastic capacitor from VTRM to
GND, as close to VTRM as possible. Do not use VTRM
to power external circuitry.
Bypass V
close to the device as possible. If V
USB detect threshold, supply current drops
below 20µA avoiding excessive V
tion, and D+/D- enter a high-impedance state allowing
other devices to drive the lines.
USB detect output (USB_DET) signals that V
sent. A high at USB_DET indicates that V
while a low at USB_DET indicates that V
sent. 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).
Suspend (SUSP) is a control input. Force SUSP high to
place the MAX3344E/MAX3345E in a low-power state.
In this state, the quiescent supply current into V
less than 40µA and RCV goes low.
In suspend mode, VPI and VMI remain active as
receive outputs and VTRM stays on. The MAX3344E/
MAX3345E continue to receive data from the USB,
allowing the µP to sense activity on the D+/D- lines and
wake up the MAX3344E/MAX3345E.
The MAX3344E/MAX3345E can also transmit data to
D+ and D- while in suspend mode. This function is
8
_______________________________________________________________________________________
CC
to GND with a 1µF ceramic capacitor as
CC
CC
current consump-
drops below the
CC
CC
USB Detect
is not pre-
is present,
CC
MODE
VTRM
is pre-
SUSP
CC
V
CC
is
used to signal a remote wake-up by driving a signal on
D+ and D- for a period of 1ms to 15ms. In suspend
mode, data can only be transmitted with full-speed
slope control.
Figure 1a. Human Body ESD Test Models
Figure 1b. Human Body Model Current Waveform
Figure 1c. IEC 1000-4-2 ESD Test Model
AMPERES
VOLTAGE
VOLTAGE
SOURCE
SOURCE
HIGH-
HIGH-
DC
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT-
CHARGE-CURRENT-
0
LIMIT RESISTOR
LIMIT RESISTOR
50MΩ TO 100MΩ
0
1MΩ
t
RL
R
R
150pF
100pF
C
C
C s
C s
CURRENT WAVEFORM
STORAGE
CAPACITOR
STORAGE
CAPACITOR
TIME
RESISTANCE
1500Ω
RESISTANCE
DISCHARGE
DISCHARGE
330Ω
R
R
t
D
D
DL
I r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
DEVICE
DEVICE
UNDER
UNDER
TEST
TEST