MAX3349EETE+ Maxim Integrated Products, MAX3349EETE+ Datasheet - Page 10

• 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

USB 2.0 Full-Speed Transceiver with UART
Multiplexing Mode
Figure 10. Human Body Model Current Waveform
Figure 11. IEC61000-4-2 ESD Contact Discharge Test Model
with a 0.1µF ceramic capacitor as close to the device
as possible.
The MAX3349E operates in either USB mode or UART
mode, depending on the presence or absence of
V
age higher than V
logic-low otherwise. The MAX3349E operates in USB
10
AMPERES
BUS
VOLTAGE
SOURCE
HIGH-
______________________________________________________________________________________
DC
. Bus detect output BD is logic-high when a volt-
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT-
0
LIMIT RESISTOR
0
50MΩ to 100MΩ
t
RL
R
C
150pF
C s
TH-VBUS
CURRENT WAVEFORM
STORAGE
CAPACITOR
TIME
RESISTANCE
DISCHARGE
330Ω
R
t
D
DL
is applied to V
I r
Operating Modes
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
BUS
DEVICE
UNDER
TEST
, and
mode when BD is logic-high, and UART mode when
BD is logic-low.
In USB mode, the MAX3349E implements a full-speed
(12Mbps) USB interface on D+ and D-, with enumerate
and suspend functions. A differential USB receiver pre-
sents the USB state as a logic-level output RCV (Table
3a). VP/VM are outputs of single-ended USB receivers
when OE is logic-high, allowing detection of single-
ended 0 (SE0) events. When OE is logic-low, VP and
VM serve as inputs to the USB transmitter. Drive sus-
pend input SUS logic-high to force the MAX3349E into
a low-power operating mode and disable the differen-
tial USB receiver (Table 3b).
The MAX3349E operates in UART mode when BD is
logic-low (V
put of a single-ended receiver on D+, and the Tx input
is driven out on D-. Signaling voltage thresholds for D+
and D- are determined by V
voltage between +2.7V and +3.3V.
In both USB and UART modes, the control interface is
powered from V
side voltage (V
ing for lower voltage ASICs and microcontrollers.
Figure 12. IEC 61000-4-2 Contact Discharge Model Current
Waveform
t
R
= 0.7ns to 1ns
Timing Diagrams (continued)
100%
90%
10%
BUS
I
L
) as low as +1.4V, providing level shift-
L
not present). The Rx signal is the out-
. The MAX3349E operates with logic-
Power-Supply Configurations
30ns
UART
60ns
, an externally applied
V
L
Logic Supply
UART Mode
USB Mode
t