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參數(shù)資料
| 型號： | MAX3454EEUD+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 4/19頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX USB ESD-PROT 14TSSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 收發(fā)器 |
| 規(guī)程： | USB 2.0 |
| 電源電壓： | 1.65 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 14-TSSOP |
| 包裝： | 帶卷 (TR) |
MAX3453E–MAX3456E
±15kV ESD-Protected USB Transceivers
12
______________________________________________________________________________________
SPD (MAX3454E/MAX3455E/MAX3456E)
SPD sets the transceiver speed. Connect SPD to GND
to select the low-speed data rate (1.5Mbps). Connect
SPD to VL to select the full-speed data rate (12Mbps).
The MAX3454E provides an internal pullup resistor for
selecting the bus speed. The MAX3455E and
MAX3456E require an external pullup resistor to D+ or
D- to set the bus speed. Connect the 1.5k
resistor
between D+ and VTRM to set the full-speed (12Mbps)
data rate, or connect the 1.5k
resistor between D- and
VTRM to set the low-speed (1.5Mbps) data rate.
SUS
The SUS state determines whether the MAX3453E–
MAX3456E operate in normal mode or in suspend
mode. Connect SUS to GND to enable normal opera-
tion. Drive SUS high to enable suspend mode. RCV
asserts low and VP and VM remain active in suspend
mode (Tables 3 and 4). Supply current decreases in
suspend mode (see the Electrical Characteristics).
BD (MAX3453E/MAX3455E)
The push-pull bus detect (BD) output monitors VBUS
and asserts high if VBUS is greater than +4.0V. BD
asserts low if VBUS is less than +3.6V and the
MAX3453E/MAX3455E enters sharing mode (Table 2).
VTRM
An internal linear regulator generates the VTRM voltage
(+3.3V, typ). VTRM derives power from VBUS (see the
Power-Supply Configurations section). VTRM powers the
internal portions of the USB circuitry and provides the
pullup voltage for an external USB pullup resistor
(MAX3455E/MAX3456E). 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.
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.
VBUS
For most applications, VBUS connects to the VBUS termi-
nal on the USB connector (see the Power-Supply
Configurations section). VBUS can also connect to an
external supply as low as +3.1V (MAX3454E/MAX3456E).
Drive VBUS low to enable sharing mode. Bypass VBUS to
GND with a 0.1F ceramic capacitor as close to the
device as possible.
External Components
External Resistors
Proper USB operation requires two external resistors,
each 27
±1%, 1/8W (or greater). Install one resistor in
series between D+ of the MAX3453E–MAX3456E and
D+ on the USB connector. Install the other resistor in
series between D- of the MAX3453E–MAX3456E and D-
on the USB connector (see Typical Operating Circuit).
The MAX3455E/MAX3456E require an external 1.5k
pullup resistor between VTRM and D+ or D- to set the
bus speed.
External Capacitors
The MAX3453E–MAX3456E require three external
capacitors for proper operation. Bypass VL to GND with a
0.1F ceramic capacitor. Bypass VBUS to GND with a
0.1F ceramic capacitor. Bypass VTRM to GND with a
1F (min) ceramic capacitor. Install all capacitors as
close to the device as possible.
Data Transfer
Transmitting Data to the USB
The MAX3453E–MAX3456E transmit data to the USB
differentially on D+ and D-. VP and VM serve as differ-
ential 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).
Figure 2. Timing of VP and VM to D+ and D-
VM
VP
D-
D+
tPLH_DRV
tPHL_DRV
VCRS_F , VCRS_L
VP AND VM RISE/FALL TIMES < 4ns
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3455EETE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX3455EEUD | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX3455EEUD-T | 制造商:Maxim Integrated Products 功能描述::15KV ESD-PROTECTED USB TRANSCEIVERS - Tape and Reel |
| MAX34561EVKIT# | 功能描述:電源管理IC開發(fā)工具 12V&5V DUAL E-FUSE RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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