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參數(shù)資料
| 型號(hào)： | MAX3450E |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | ?5kV ESD-Protected USB Transceivers |
| 中文描述： | 具有±15kV ESD保護(hù)的USB收發(fā)器 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大小： | 379K |
| 代理商： | MAX3450E |
M
BD (MAX3452E)
The push-pull bus detect (BD) output monitors V
BUS
and asserts high if V
BUS
is greater than +4.0V. BD
asserts low if V
BUS
is less than +3.6V and the
MAX3452E enters sharing mode (Table 2).
V
TRM
An internal linear regulator generates the V
TRM
voltage
(+3.3V typ). V
TRM
derives power from V
BUS
(see the
Power-Supply Configurations
section). V
TRM
powers the
internal portions of the USB circuitry and provides the
pullup voltage for an external USB pullup resistor
MAX3450E/MAX3452E. Bypass V
TRM
to GND with a 1μF
ceramic capacitor as close to the device as possible.
Do not use V
TRM
to provide power to external circuitry.
D+ and D-
D+ and D- serve as bidirectional bus connections and
are ESD protected to
±
15kV (Human Body Model). For
OE
= low, D+ and D- serve as transmitter outputs. For
OE
= high, D+ and D- serve as receiver inputs.
V
BUS
For most applications, V
BUS
connects to the V
BUS
ter-
minal on the USB connector. V
BUS
can also connect to
an external supply as low as +3.1V (MAX3450E and
MAX3451E). See the
Power-Supply Configurations
sec-
tion. Drive V
BUS
low to enable sharing mode. Bypass
V
BUS
to GND with a 0.1μF ceramic capacitor as close
to the device as possible.
External Components
External Resistors
Proper USB operation requires two external resistors,
each 24.3
±
1%, 1/8W (or greater). Install one resistor
in series between D+ of the MAX3450E/MAX3451E/
MAX3452E and D+ on the USB connector. Install the
other resistor in series between D- of the MAX3450E/
MAX3451E/MAX3452E and D- on the USB connector
(see the
Typical Operating Circuit
).
The MAX3450E/MAX3452E requires an external 1.5k
pullup resistor between V
TRM
and D+ or D- to set the
bus speed.
External Capacitors
The MAX3450E/MAX3451E/MAX3452E require three
external capacitors for proper operation. Bypass V
L
to
GND with a 0.1μF ceramic capacitor. Bypass V
BUS
to
GND with a 0.1μF ceramic capacitor. Bypass V
TRM
to
GND with a 1μF (min) ceramic capacitor. Install all capac-
itors as close to the device as possible.
Data Transfer
Transmitting Data to the USB
The MAX3450E/MAX3451E/MAX3452E transmit data to
the USB differentially on D+ and D-. VP and VM serve as
differential input signals to the driver (Tables 3a and 3b).
Receiving Data from the USB
To receive data from the USB, drive
OE
high and SUS
low. Differential data received by D+ and D- appears
as a differential logic signal at RCV. Single-ended
receivers on D+ and D- drive VP and VM, respectively
(Tables 4a and 4b).
±15kV ESD-Protected USB Transceivers
10
______________________________________________________________________________________
Figure 2. Timing of VP and VM to D+ and D-
VM
VP
D-
D+
t
PLH_DRV
t
PHL_DRV
V
CRS_F
, V
CRS_L
VP AND VM RISE/FALL TIMES < 4ns
Table 4b. Receive Truth Table
(
OE
= 1 and SUS = 1)
INPUTS
D+
0
0
1
1
OUTPUTS
VM
0
1
0
1
D-
0
1
0
1
VP
0
0
1
1
RCV
0
0
0
0
OUTPUT STATE
SE0
Logic 0
Logic 1
Undefined
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3451E | ?5kV ESD-Protected USB Transceivers |
| MAX3452E | ?5kV ESD-Protected USB Transceivers |
| MAX3450EEUD | 【15kV ESD-Protected USB Transceivers |
| MAX3451EEUD | 【15kV ESD-Protected USB Transceivers |
| MAX3452EEUD | 【15kV ESD-Protected USB Transceivers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3450EETE | 功能描述:USB 接口集成電路 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 |
| MAX3450EETE+ | 功能描述:USB 接口集成電路 USB Transceiver 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 |
| MAX3450EETE+T | 功能描述:USB 接口集成電路 USB Transceiver 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 |
| MAX3450EETE-T | 功能描述:USB 接口集成電路 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 |
| MAX3450EEUD | 功能描述:USB 接口集成電路 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 |
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