MAX3349EETE+ Maxim Integrated Products, MAX3349EETE+ Datasheet - Page 11

• Manufacturer Part Number: MAX3349EETE+
• Description: IC TXRX USB 2.0 FS 16-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of MAX3349EETE+

• Number Of Drivers/receivers: 1/1
• Protocol: USB 2.0
• Voltage - Supply: 4 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX3349E is in USB mode when V
than V
high. In USB mode, power for the MAX3349E is derived
from V
tor. An internal linear regulator generates the required
+3.3V V
nal USB transceiver circuitry and the D+ enumeration
resistor. Bypass V
capacitor as close to the device as possible. Do not
power external circuitry from V
Connect V
unconnected or connect to ground to enter disable
mode. In disable mode, D+ and D- are high imped-
ance, and withstand external signals up to +5.5V. OE,
SUS, and control signals are ignored.
Table 1. Power-Supply Configuration
Table 2. USB Transmit Truth Table (OE = 0)
Table 3a. USB Receive Truth Table (OE = 1,
SUS = 0)
* = Last State
X = Undefined
GND or Unconnected
VP
0
0
1
1
D+
0
0
1
1
INPUTS
BUS
+4.0 to +5.5
+4.0 to +5.5
TH-BUS
INPUTS
TRM
V
BUS
, typically provided through the USB connec-
BUS
USB 2.0 Full-Speed Transceiver with UART
voltage from V
(V)
VM
0
1
0
1
and the bus detect output (BD) is logic-
to a system power supply and leave V
D-
0
1
0
1
______________________________________________________________________________________
TRM
D+
0
0
1
1
to GND with a 1µF ceramic
+3.0 to +3.6 Output
+3.0 to +3.6 Output
VP
BUS
0
0
1
1
High Impedance
TRM
. V
V
TRM
OUTPUTS
TRM
.
OUTPUTS
(V)
VM
powers the inter-
0
1
0
1
Disable Mode
BUS
D-
0
1
0
1
USB Mode
is greater
RCV*
RCV
GND or Unconnected
0
1
X
+1.4 to +2.75
+1.4 to +2.75
L
V
L
(V)
Connect V
leave V
the MAX3349E in UART mode. The MAX3349E sup-
ports V
OE controls the direction of communication for USB
mode. When OE is logic-low, VP and VM operate as
logic inputs, and D+/D- are outputs. When OE is logic-
high, VP and VM operate as logic outputs, and D+/D-
are inputs. RCV is the output of the differential USB
receiver connected to D+/D-, and is not affected by the
OE logic level.
Drive ENUM logic-high to enable the internal 1.5kΩ
pullup resistor from D+ to V
to disable the internal pullup resistor and logically dis-
connect the MAX3349E from the USB.
Operate the MAX3349E in low-power USB suspend
mode by driving SUS logic-high. In suspend mode, the
USB differential receiver is turned off and V
sumes 38µA (typ) of supply current. The single-ended
VP and VM receivers remain active to detect a SE0
state on USB bus lines D+ and D-. The USB transmitter
Table 3b. USB Receive Truth Table (OE = 1,
SUS = 1)
D+
0
0
1
1
UART
BUS
INPUTS
L
GND, Unconnected, or
GND, Unconnected, or
Multiplexing Mode
unconnected or below V
and V
from +2.7V to +3.3V (see Table 1).
+2.7V to +3.3V
+2.7V to +3.3V
+2.7V to +3.3V
D-
0
1
0
1
V
UART
UART
(V)
to system power supplies, and
VP
0
0
1
1
TRM
USB Control Signals
. Drive ENUM logic-low
OUTPUTS
CONFIGURATION
TH-BUS
VM
Disable Mode
0
1
0
1
UART Mode
USB Mode
UART Mode
to operate
BUS
ENUM
RCV
0
0
0
0
SUS
con-
OE
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