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参数资料
| 型号： | MAX13345EETD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/18页 |
| 文件大小： | 0K |
| 描述： | IC TXRX USB FS 3WIRE 14-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | USB 2.0 |
| 电源电压： | 2.3 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
MAX13342E/MAX13345E
3-Wire Interface Full-Speed USB Transceivers
With/Without Internal Series Resistors
10
______________________________________________________________________________________
3-Wire DAT/SE0 Interface
The MAX13342E/MAX13345E use DAT and SE0 to
drive data or a single-ended zero onto the D+/D- lines.
When
OE is low, SE0 is an input and functions as a
single-ended zero driver. When SE0 is high, both D+
and D- are driven low. When SE0 is driven low, the
D+/D- outputs are controlled by DAT.
DAT is used to send data on D+/D- when both
OE and
SE0 are low. When DAT is high, D+ is driven high and
D- is driven low. When DAT is low, D+ is driven low and
D- is driven high.
In receive mode (
OE = high), DAT is the output of the
differential receiver connected to D+ and D-. SE0 only
goes active high when both D+ and D- are low.
Control Signals
USB Detection
The MA13342E/MAX13345E USB detection function
indicates that VBUS is present. The MAX13342E/
MAX13345E push-pull bus detection output (BD) moni-
tors VBUS, and asserts high when VBUS and VL are pre-
sent. BD asserts low if VBUS is less than +3.6V and
enters sharing mode.
OE
OE controls the direction of communication when VL
and VBUS are both present. When OE is low, DAT and
SE0 operate as logic inputs and D+/D - are outputs.
When
OE is high, DAT and SE0 operate as logic out-
puts and D+/D- are inputs.
SUS
SUS determines whether the MAX13342E/MAX13345E
operate in normal mode or in suspend mode. Drive
SUS low for normal operation. Drive SUS high to enable
suspend mode. In suspend mode, the single-ended
receivers (D+/D-) are active to detect a wake-up event.
Supply current decreases to less than 45A in suspend
mode.
The MAX13342E/MAX13345E can transmit data on D+
and D- while in suspend mode. This function is used to
signal a remote wake-up event.
ENUM
A 1.5k
pullup resistor on D+ is used to indicate full-
speed (12Mbps) operation. Drive ENUM high to con-
nect the internal pullup resistor from D+ to VTRM. Drive
ENUM low to disconnect the internal pullup resistor
from D+ to VTRM.
D+ and D-
D+ and D- are bidirectional signals and are ESD pro-
tected to ±15kV (HBM).
OE controls the direction of D+
and D- when in USB normal mode (Tables 3 and 4).
VTRM
An internal linear regulator generates the VTRM voltage
(+3.3V typ). VTRM derives power from VBUS (see the
Power-Supply Configuration section). VTRM powers the
internal USB circuitry and provides the pullup voltage
for the internal 1.5k
resistor. Bypass VTRM to GND
with a 1F ceramic capacitor as close to the device as
possible. Do not use VTRM to provide power to external
circuitry.
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