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参数资料
| 型号： | MAX3420EETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/22页 |
| 文件大小： | 0K |
| 描述： | IC USB PERIPH CONTROLLER 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 控制器类型： | USB 外设控制器 |
| 接口： | USB/串行 |
| 电源电压： | 3 V ~ 3.6 V |
| 电流 - 电源： | 15mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 配用： | MAX3420EEVKIT-2+-ND - EVAL KIT FOR MAX3420E |
The MAX3420E connects to any microprocessor using
3 or 4 interface pins (Figure 1). On a simple micro-
processor without SPI hardware, these can be bit-
banged general-purpose I/O pins. Four GPIN and four
GPOUT pins on the MAX3420E more than replace the
P pins necessary to implement the interface. Although
the MAX3420E SPI hardware includes separate data-in
(MOSI, (master-out, slave-in)) and data-out (MISO,
(master-in, slave-out)) pins, the SPI interface can also
be configured for the MOSI pin to carry bidirectional
data, saving an interface pin. This is referred to as half-
duplex mode.
Two MAX3420E features make it easy to connect to
large, fast chips such as ASICs and DSPs (see Figure
2). First, the SPI interface can be clocked up to 26MHz.
Second, a VL pin and internal level translators allow
running the system interface at a lower voltage than the
3.3V required for VCC.
The MAX3420E provides an ideal method for electrically
isolating a USB interface (Figure 3). USB employs flow
control in which the MAX3420E automatically answers
host requests with a NAK handshake, until the micro-
processor completes its data-transfer operations over
the SPI port. This means that the SPI interface can run
at any frequency up to 26MHz. Therefore, the designer
is free to choose the interface operating frequency and
to make opto-isolator choices optimized for cost or per-
formance.
USB Peripheral Controller
with SPI Interface
Typical Application Circuits
3.3V
REGULATOR
SPI
3, 4
INT
USB
μP
MAX3420E
3.3V
REGULATOR
POWER RAIL
ASIC,
DSP,
ETC.
SPI
3, 4
INT
MAX3420E
USB
Figure 2. The MAX3420E Connected to a Large Chip
3.3V
REGULATOR
MISO
LOCAL
GND
LOCAL
POWER
INT
MAX3420E
SCLK
MOSI
SS
MICRO
ASIC
DSP
I
S
O
L
A
T
O
R
S
USB
Figure 3. Optical Isolation of USB Using the MAX3420E
Figure 1. The MAX3420E Connects to Any Microprocessor
Using 3 or 4 Interface Pins
MAX3420E
2
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3420EEVKIT | 制造商:Maxim Integrated Products 功能描述:MAX3420E EVAL KIT - Bulk |
| MAX3420EEVKIT-2+ | 功能描述:界面开发工具 MAX3420E Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX3421E | 制造商:Maxim Integrated Products 功能描述:USB PERIPHERAL/HOST CONTROLLER WITH SPI INTERFACE - Rail/Tube |
| MAX3421EEHJ+ | 功能描述:外围驱动器与原件 - PCI USB Peripheral Controller w/SPI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| MAX3421EEHJ+T | 功能描述:外围驱动器与原件 - PCI USB Peripheral Controller w/SPI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
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