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參數(shù)資料
| 型號： | CM2400 |
| 英文描述： | Universal Serial Bus Transceiver with Level Translator |
| 中文描述： | 通用串行總線收發(fā)器電平轉換 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 271K |
| 代理商： | CM2400 |
2003 California Micro Devices Corp. All rights reserved.
12
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L
Tel: 408.263.3214
L
Fax: 408.263.7846
L
www.calmicro.com
10/01/03
CM2400-01
Application Information
The CM2400-01 transceiver is targeted for full-speed
(12Mbits/s) USB peripherals including handheld elec-
tronic devices such as PDAs and cell phones. It pro-
vides the interface between the core I/O signals (within
a range of 1.65V and 3.6V) and the USB data lines (D+
and D-) operating at 3.3V.
This section describes how the USB transceiver inter-
faces to the USB port and to the controller or ASIC on
the other side. A small number of external components
is needed that includes two 33
series resistors for ter-
mination, two capacitors for filtering, and a 1.5K
pull-
up resistor on the D+ data line to configure full-speed
(12Mbits/second) operation. This pull-up resistor is tied
to the V
PU
pin which internally connects to V
REG
(3.3V)
when ENUM is set High. An internal switch discon-
nects V
PU
from V
REG
(V
PU
floating or high impedance)
when ENUM is set Low.
CAMD offers the PACUSB-U2 filter, available in both
the SC70 and SOT23 6-lead packages, that integrates
all these components as well as the additional ESD
protection rated to 15kV per the IEC61000-4-2 stan-
dard (exceeding level 4).
Figure 10
shows a typical
electrical schematic for a USB peripheral application.
The driver output resistance for the full-speed driver,
should be between 28
and 44
(refer to the USB
Specification section 7.1.1.1). Since the CM2400-01
output impedance is about 6
, it is recommended that
33
series resistors be used.
Figure 10. Schematic for USB Peripheral Device
The MODE pin selects the differential receiver
mode when High (CMOS level or V
CC
), and selects
the single-ended receiver mode when Low (con-
nected to GND).
The CM2400-01 is used in bus-powered systems
only, where the V
BUS
supply pin is connected to
the +5V V
BUS
line from the USB connector.
The V
CC
supply pin is the supply for the I/O signal
logic that provide the interface with the ASIC. The
V
CC
supply must range between 1.65V min and
3.6V max.
相關PDF資料 |
PDF描述 |
|---|---|
| CM2400-01HB | Universal Serial Bus Transceiver with Level Translator |
| CM2400-02 | Universal Serial Bus Transceiver with Level Translator |
| CM2400-04HA | Universal Serial Bus Transceiver with Level Translator |
| CM2400-02HA | Universal Serial Bus Transceiver with Level Translator |
| CM2400-02HB | Universal Serial Bus Transceiver with Level Translator |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| CM2400-01 | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:Universal Serial Bus Transceiver with Level Translator |
| CM2400-01HB | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:Universal Serial Bus Transceiver with Level Translator |
| CM2400-02 | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:Universal Serial Bus Transceiver with Level Translator |
| CM2400-02HA | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:Universal Serial Bus Transceiver with Level Translator |
| CM2400-02HB | 制造商:CALMIRCO 制造商全稱:California Micro Devices Corp 功能描述:Universal Serial Bus Transceiver with Level Translator |
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