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參數(shù)資料
| 型號： | MIC2551AYML25 TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC USB TRANSCEIVER 14-MLF |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | USB 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | USB 2.0 |
| 電源電壓： | 4 V ~ 5.25 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-VFQFN 裸露焊盤，14-MLF? |
| 供應(yīng)商設(shè)備封裝： | 14-MLF?（2.5x2.5） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1113 (CN2011-ZH PDF) |
| 其它名稱： | 576-2664-6 |
MIC2551A-2.5
Micrel, Inc.
M9999-030810
8
March 2010
Power Supply Configuration
The MIC2551A can be set up for different power supply
configurations which modify the behavior of the device. Both
VBUS and VIF have special thresholds that detect when they
are either removed or grounded. Table 1 depicts the behavior
under the different power supply configuration scenarios that
are explained below.
Normal Mode
VBUS is connected to the 5.0V USB bus voltage and VIF is
connected to a supply voltage in the range of 1.6V to 3.6V. In
thiscaseVTRMsuppliesa3.3Vvoltageforpoweringthespeed
select resistor via VPU depending on the state of CON pin.
Disconnect Mode
VIF is connected to a supply in a range of 1.6V to 3.6V and
VBUSisopenorgrounded.IfVBUSisopenedwhiletransmitting,
the data lines (D+, D–) have sharing capability and may be
driven with external devices up to approximately 3.6V if and
only if SUSPEND is enabled (SUS = 1). With VBUS ground,
D+, D– sharing mode is not permitted.
Disable Mode
VBUS is connected to the 5.0V USB bus voltage and VIF is
open. All logic controlled inputs become high impedances,
thus minimal current will be supplied by VIF if the input pins
are pulled up to an external source.
Alternate Power Supply Configuration Option
I/O Interface Using 3.3V
In systems where the I/O interface utilizes a 3.3V USB con-
troller, an alternate solution is shown in Figure 7. No extra
components are required; however, the load on VTRM must
not exceed 10mA.
MIC2551A
VIF
VBUS
I/O
VBUS
VP/VM/
RCV/OE#
VTRM
USB
Controller
VDD
3.3V
Figure 7. I/O Interface Using 3.3V
Signal Amplitude Respective to VIF
When operating the MIC2551A, it is necessary to provide
input signals which do not exceed VIF + 0.3V.
Suspend
When the suspend pin (SUS) is high, power consumption is
reduced to a minimum. VTRM is not disabled. RCV, VP and
VM are still functional to enable the device to detect USB
activity. For minimal current consumption in suspend mode,
it is recommended that OE# = 1, and SPD = 0.
Speed
The speed pin (SPD) sets D+/D– output edge rates by in-
creasing or decreasing biasing current sources within the
output drivers. For low speed, SPD = 0. For full speed, SPD
= 1. By setting SPD = 0 during idle periods, in conjunction
with suspend (SUS), the lowest quiescent current can be
obtained. However, designers must provide a 300ns delay
between changing SPD from 0 to 1 and transmission of data
at full speed. This delay ensures the output drivers have ar-
rived at their proper operating conditions. Failure to do so
can result in leading edge distortion on the first few data bits
transmitted.
Non-Multiplexed Bus
InordertosavepincountfortheUSBlogiccontrollerinterface,
the MIC2551Awas designed with VPand VM as bi-directional
pins. To interface the MIC2551A with a non-multiplexed data
bus, resistors can be used for low cost isolation, as shown
in Figure 8.
VPO
VP
VM
VMO
USB Logic
Controller
(SIE)
MIC2551A
VP
VM
10k
Figure 8. MIC2551A Interface to
Non-Multiplexed Data Bus
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| MIC2551AYML-TR | 功能描述:1/1 Transceiver Half USB 2.0 16-MLF? (4x4) 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 類型:收發(fā)器 協(xié)議:USB 2.0 驅(qū)動器/接收器數(shù):1/1 雙工:半 接收器滯后:200mV 數(shù)據(jù)速率:12Mbps 電壓 - 電源:4 V ~ 5.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VFQFN 裸露焊盤，16-MLF? 供應(yīng)商器件封裝:16-MLF?（4x4） 標(biāo)準(zhǔn)包裝:1 |
| MIC2551AYTS | 功能描述:USB 接口集成電路 USB Transceiver - Lead Free RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| MIC2551AYTS TR | 功能描述:USB 接口集成電路 USB Transceiver - Lead Free RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| MIC2551BML | 制造商:Micrel Inc 功能描述:USB Transceiver 1TR 12Mbps 16-Pin MLF EP 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC2551BMLTR | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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