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參數(shù)資料
| 型號： | MAX14582EWC+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/21頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX USB 2.0 FS 5WIRE 12WLP |
| 標準包裝： | 2,500 |
| 系列： | * |
Industry’s Smallest and Lowest (VL) Full-Speed
USB Transceivers, with Low VIO 3/5-Wire Interface
MAX14581/MAX14582
15
Table 2b. Disable Mode and Sharing Mode Connection, 5-Wire Interface
3-Wire Interface
The MAX14581 uses 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- if SUS = 0
or the putput of the D+ single-ended comparator if SUS
= OE = VL. SE0 only goes active-high when both D+ and
D- are low.
5-Wire Interface
In USB mode, the MAX14582 implements a full-speed
(12Mbps) USB interface on D+ and D-, with enumerate
and suspend functions. A differential USB receiver pres-
ents the USB state as a logic-level output RCV (Table 6).
VP/VM are outputs of single-ended USB receivers when
OE is high, allowing detection of single-ended zero (SE0)
events. When OE is low, VP and VM serve as inputs to
the USB transmitter. Drive suspend input SUS logic-high
to force the MAX14581/MAX14582 into a suspend mode
and disable the differential USB receiver (Table 6).
Control Signals
USB Detection (MAX14581)
The MAX14581 USB detection function indicates that
VBUS is present. The MAX14581 push-pull bus detection
output (BD) monitors VBUS, and asserts high when VBUS
and VL are present. BD asserts low if VBUS is less than
VTH_VBUS and enters sharing mode.
OE
OE controls the direction of communication when VL and
VBUS are both present.
For the MAX14581 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 outputs and D+/D- are
inputs.
For the MAX14582 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.
SUS
SUS determines whether the MAX14581/MAX14582
operate in normal mode or in suspend mode. Drive SUS
low for normal operation. Drive SUS high to enable sus-
pend mode. In suspend mode, the single-ended receiv-
ers (D+/D-) are active to detect a wake-up event. Supply
current decreases to less than 18FA (typ) from VBUS in
suspend mode.
The devices can transmit data on D+ and D- while in
suspend mode. This function is used to signal a remote
wake-up event.
ENUM
A 1.5kI pullup resistor on D+ is used to indicate full-
speed (12Mbps) operation. Drive ENUM high to connect
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.
INPUTS/OUTPUTS
DISABLE MODE
SHARING MODE
VBUS
3.0V to 5.5V
Unconnected or connected to GND
VL
Unconnected or connected to GND
1.2V to 3.6V input
D+ and D-
High impedance
SUS
Unconnected or connected to GND
High or low
OE
Unconnected or connected to GND
High or low
VM, VP
High impedance
5kI pullup resistor to VL
RCV
Low
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