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参数资料
| 型号： | MAX3421EETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/28页 |
| 文件大小： | 0K |
| 描述： | IC USB PERIPH/HOST CNTRL 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 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： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 托盘 |
| 产品目录页面： | 1407 (CN2011-ZH PDF) |
| 配用： | MAX3421EVKIT-1+-ND - EVAL KIT FOR MAX3421E |
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MAX3421E
USB Peripheral/Host Controller
with SPI Interface
15
Maxim Integrated
Typical Operating Characteristics
(VCC = +3.3V, VL = +3.3V, TA = +25°C.)
Detailed Description
The MAX3421E contains digital logic and analog cir-
cuitry necessary to implement a full-speed USB periph-
eral or a full-/low-speed host compliant to USB
specification rev 2.0. The MAX3421E is selected to
operate as either a host or peripheral by writing to the
HOST bit in the MODE (R27) register. The MAX3421E
features an internal USB transceiver with ±15kV ESD
protection on D+, D-, and VBCOMP. A switchable
1.5k
Ω pullup resistor is provided on D+ and switchable
15k
Ω pulldown resistors are provided on both D+ and
D-. Any SPI master can communicate with the
MAX3421E through the SPI slave interface that oper-
ates in SPI mode (0,0) or (1,1). An SPI master accesses
the MAX3421E by reading and writing to internal regis-
ters. A typical data transfer consists of writing a first
byte that sets a register address and direction with
additional bytes reading or writing data to the register
or internal FIFO.
In peripheral mode, the MAX3421E contains 384 bytes
of endpoint buffer memory, implementing the following
endpoints:
EP0: 64-byte bidirectional CONTROL endpoint
EP1: 2 x 64-byte double-buffered BULK/INT
OUT endpoint
EP2: 2 x 64-byte double-buffered BULK/INT IN
endpoint
EP3: 64-byte BULK/INT IN endpoint
The choice to use EP1, EP2, EP3 as BULK or INTER-
RUPT endpoints is strictly a function of the endpoint
descriptors that the SPI master returns to the USB host
during enumeration.
In host mode, the MAX3421E contains 256 bytes of
send and receive FIFO memory:
SNDFIFO: Send FIFO—double-buffered 64-byte
FIFO
RCVFIFO: Receive FIFO—double-buffered 64-byte
FIFO
The host FIFOs can send SETUP, BULK, INTERRUPT,
and ISOCHRONOUS requests to a peripheral device, at
full speed or low speed. The MAX3421E accommodates
low-speed devices whether they are directly connected,
or connected through a USB hub. Because the
MAX3421E does much of the host housekeeping, it is
easy to program. The SPI master does a typical host
operation by setting the device address and endpoint,
launching a packet, and waiting for a completion inter-
rupt. Then it examines transfer result bits to determine
how the peripheral responded. It automatically gener-
ates frame markers (full-speed SOF packets or low-
speed keep-alive pulses), and ensures that packets are
dispatched at the correct times relative to these markers.
The MAX3421E register set and SPI interface is optimized
to reduce SPI traffic. An interrupt output pin, INT, notifies
the SPI master when USB service is required; for exam-
ple, when a packet arrives, a packet is sent, or the host
suspends or resumes bus activity. Double-buffered FIFOs
EYE DIAGRAM
MAX3421E
toc01
4
1
0
-1
0
1020304050607080
2
3
TIME (ns)
D+
AND
D-
(V)
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| MAX3430ESA+T | IC TXRX RS-485 3.3V 8-SOIC |
| MAX3440EASA+ | IC TXRX RS-485 8-SOIC |
| MAX3452EETE+ | IC USB TRANSCEIVER 16-TQFN |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3421EETJ+ | 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 |
| MAX3421EETJ+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 |
| MAX3421EVKIT-1+ | 功能描述:界面开发工具 MAX3421E/20E 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 |
| MAX3430CPA | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX3430CPA+ | 功能描述:RS-485接口IC Fail-Safe 1/4-Unit 3.3V Transceiver RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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