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參數(shù)資料
| 型號(hào)： | MAX3349EAETE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | USB 2.0 Full-Speed Transceiver with UART Multiplexing Mode |
| 中文描述： | LINE TRANSCEIVER, QCC16 |
| 封裝： | 4 X 4 MM, 0.80 MM HEIGHT, MO-220WGGC, TQFN-16 |
| 文件頁(yè)數(shù)： | 7/17頁(yè) |
| 文件大?。?/td> | 397K |
| 代理商： | MAX3349EAETE |
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M
USB 2.0 Full-Speed Transceiver with UART
Multiplexing Mode
_______________________________________________________________________________________
7
Pin Description
PIN
UCSP
TQFN
TYPE
NAME
FUNCTION
A1
1
POWER
V
UART
UART Supply Voltage. V
UART
powers the internal UART transmitter and receiver.
Connect a regulated voltage between +2.7V and +3.3V to V
UART
. Bypass V
UART
to
GND with a 0.1μF ceramic capacitor.
A2
2
OUTPUT
RX
UART Receive Output. In UART mode, RX is a level-shifted output that expresses
the logic state of D+.
A3
3
INPUT
TX
UART Transmit Input. In UART mode, D- follows the logic state on TX.
USB Detect Output. When V
BUS
exceeds the V
TH-BUS
threshold, BD is logic-high to
indicate that the MAX3349E is connected to a USB host. The MAX3349E operates in
USB mode when BD is logic-high, and operates in UART mode when BD is logic-
low.
Digital Logic Supply. Connect a +1.4V to +2.75V supply to V
L
. Bypass V
L
to GND
with a 0.1μF or larger ceramic capacitor.
A4
4
OUTPUT
BD
B1
15
POWER
V
L
B2
16
I/O
VM
Receiver Output/Driver Input. VM functions as a receiver output when
OE
= V
L
. VM
follows the logic state of D- when receiving. VM functions as a driver input when
OE
= GND (Tables 2 and 3).
Receiver Output/Driver Input. VP functions as a receiver output when
OE
= V
L
. VP
follows the logic state of D+ when receiving. VP functions as a driver input when
OE
= GND (Tables 2 and 3).
Differential Receiver Output. In USB mode, RCV is the output of the USB differential
receiver (Table 3).
B3
5
I/O
VP
B4
6
OUTPUT
RCV
C1
14
POWER
V
TRM
Internal Regulator Output. V
TRM
provides a regulated +3.3V output. Bypass V
TRM
to
GND with a 1μF ceramic capacitor. V
TRM
draws power from V
BUS
. Do not power
external circuitry from V
TRM
.
C2
13
INPUT
ENUM
Enumerate Input. Drive ENUM to V
L
to connect the internal 1.5k
resistor from D+ to
V
TRM
(when V
BUS
is present). Drive ENUM to GND to disconnect the internal 1.5k
pullup resistor. ENUM has no effect when the device is in UART mode.
C3
8
INPUT
SUS
Suspend Input. Drive SUS low for normal operation. Drive SUS high to force the
MAX3349E into suspend mode.
C4
7
INPUT
OE
Output Enable. Drive
OE
low to set VP/VM to transmitter inputs in USB mode. Drive
OE
high to set VP/VM to receiver outputs in USB mode.
OE
has no effect when the
device is in UART mode.
D1
12
POWER
V
BUS
USB Supply Voltage. V
BUS
provides power to the internal linear regulator when in
USB mode. Bypass V
BUS
to GND with a 0.1μF ceramic capacitor.
USB Differential Data Input/Output. Connect D+ directly to the USB connector.
USB Differential Data Input/Output. Connect D- directly to the USB connector.
Ground
Exposed Paddle. Connect exposed paddle to GND.
D2
D3
D4
—
11
10
9
EP
I/O
I/O
D+
D-
GND
EP
POWER
—
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