參數(shù)資料
型號(hào): MIC2551YTS TR
廠(chǎng)商: Micrel Inc
文件頁(yè)數(shù): 9/11頁(yè)
文件大?。?/td> 0K
描述: IC USB TRANSCEIVER 14-TSSOP
標(biāo)準(zhǔn)包裝: 2,500
類(lèi)型: USB 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: USB 2.0
電源電壓: 4 V ~ 5.25 V
安裝類(lèi)型: 表面貼裝
封裝/外殼: 14-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 14-TSSOP
包裝: 帶卷 (TR)
其它名稱(chēng): MIC2551YTSTR
MIC2551YTSTR-ND
November 2008
7
M9999-112008
MIC2551
Micrel, Inc.
Functional Description
The MIC2551 is designed to provide USB connectivity in
mobile systems where available system supply voltages are
not able to satisfy USB requirements. The MIC2551 can
operate down to supply voltages of 1.6V and still meet USB
physical layer specifications. As shown in the circuit above,
the MIC2551 takes advantage of the USB supply voltage,
V
BUS, to operate the transceiver. The system voltage, VIF, is
used to set the reference voltage used by the digital I/O lines
interfacing to the system controller. Internal circuitry provides
translation between the USB and system voltage domains.
V
IF will typically be the main supply voltage rail for the
controller.
Functional Diagram
To Internal
Circuitry
VBUS
VTERM
VPU
D+
D–
Le
v
e
l
Tr
a
nslator
LDO
Regulator
VIF
CON
SPD
OE#
RCV
VP
VM
SUS
GND
MIC2551 Block Diagram
In addition, a 3.3V, 10% termination supply voltage, V
PU, is
provided to support speed selection. V
PU can be disabled or
enabled under software control via the CON input. This
allows for software-controlled connect or disconnect states.
A 1.5k resistor is required to be connected between this pin
and the D+ or D– lines to respectively specify high speed or
low speed operation.
The use of ESD transient protection devices is not required
for operation, but is recommended. The MIC2551 is ESD
rated for 11kV at the VBUS and D+, D– pins and 2kV for all
other pins.
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