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參數(shù)資料
| 型號： | DS229N |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Line Driver or Receiver |
| 英文描述： | LINE TRANSCEIVER, PDIP20 |
| 封裝： | DIP-20 |
| 文件頁數(shù)： | 4/29頁 |
| 文件大?。?/td> | 1710K |
| 代理商： | DS229N |
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MAX14640–MAX14644/MAX14651
USB Host Adapter Emulators
12
Maxim Integrated
Detailed Description
The MAX14640–MAX14644/MAX14651 adapter emulator
devices have high-speed USB analog switches that sup-
port USB hosts by identifying the USB port as a charger
when the USB host is in a low-power mode and cannot
enumerate USB devices. The devices feature low 4pF
(typ) on-capacitance and low 4I (typ) on-resistance
when the USB switches are connected. DP and DM are
capable of handling signals between 0V and 5.5V over
the entire 3.0V–5.5V supply range.
The MAX14640/MAX14651 are controlled by an I2C inter-
face while the MAX14641–MAX14644 are controlled by
the CB0 and CB1 logic inputs. The I2C interface allows
further customization over which mode the MAX14640/
MAX14651 operate in and can be used to read back
connection information.
Improvements over the MAX14600 USB detector family
include support for some smartphones that do not con-
nect after applying 0.6V in charging downstream port
(CDP) mode. The devices also support high-current
charging of Apple devices while in sleep mode.
Resistor-Dividers
The MAX14640–MAX14644/MAX14651 feature internal
resistor-divider networks on the data lines to provide
support for Apple devices. The resistor-divider is discon-
nected while not in use to minimize the supply current.
The resistor-dividers are not connected in pass-through
mode. Table 1 summarizes the resistor values connected
to DP/DM in different charging modes.
Switch Control
Digital Controls
The MAX14641–MAX14644 feature two digital select
inputs, CB0 and CB1, for mode selection. Table 2,
be used to enter autodetection charger mode (AM_),
pass-through mode (PM), forced charger mode (FM
and AP_), and pass-through mode with CDP emulation
(CM).
In CDP emulation mode, the peripheral device with CDP
detection capability draws charging current up to 1.5A
immediately without USB enumeration.
Table 1. DP/DM Resistor-Dividers
Table 2. Digital Input State Table for the MAX14641
CHARGING MODE
DP PULLUP (kI)
DP PULLDOWN (kI)
DM PULLUP (kI)
DM PULLDOWN (kI)
AM1
75
49.9
43.2
49.9
AM2
43.2
49.9
75
49.9
CB1
CB0
CHARGER/USB
MODE
STATUS
0
CHARGER
AM2
2A Autodetection Charger Mode for Apple Devices. Resistor-dividers are
connected to DP/DM.
1
0
CHARGER
AP1
Forced 1A Charger Mode for Apple Devices. Resistor-dividers are connected to
DP/DM.
0
1
USB
PM
USB Pass-Through Mode. DP/DM are connected to TDP/TDM.
1
USB
CM
USB Pass-Through Mode with CDP Emulation. Auto connects DP/DM to TDM/TDM
depending on CDP detection status.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS229N+ | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS229S | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS229S/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC TXRX TRI 5V RS-232 IND 20SOIC |
| DS229S/T&R/ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS229S/T&R | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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