MAX14644ETA+T Maxim Integrated, MAX14644ETA+T Datasheet - Page 12

• Manufacturer Part Number: MAX14644ETA+T
• Description: USB Interface IC USB Host Adapter Emulator
• Manufacturer: Maxim Integrated

Specifications of MAX14644ETA+T

• Rohs: yes

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 I
face while the MAX14641–MAX14644 are controlled by
the CB0 and CB1 logic inputs. The I
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.
Table 1. DP/DM Resistor-Dividers
Table 2. Digital Input State Table for the MAX14641
Maxim Integrated
CB1
0
1
0
1
CHARGING MODE
CB0
AM1
AM2
0
0
1
1
CHARGER/USB
CHARGER
CHARGER
USB
USB
Detailed Description
DP PULLUP (kI)
43.2
75
MODE
AM2
AP1
CM
PM
2
C interface allows
MAX14640–MAX14644/MAX14651
2A Autodetection Charger Mode for Apple Devices. Resistor-dividers are
connected to DP/DM.
Forced 1A Charger Mode for Apple Devices. Resistor-dividers are connected to
DP/DM.
USB Pass-Through Mode. DP/DM are connected to TDP/TDM.
USB Pass-Through Mode with CDP Emulation. Auto connects DP/DM to TDM/TDM
depending on CDP detection status.
DP PULLDOWN (kI)
2
C inter-
USB Host Adapter Emulators
49.9
49.9
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.
to DP/DM in different charging modes.
The MAX14641–MAX14644 feature two digital select
inputs, CB0 and CB1, for mode selection.
Table
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.
3, and
Table 1
DM PULLUP (kI)
Table 4
STATUS
summarizes the resistor values connected
43.2
75
show how the CB1/CB0 inputs can
DM PULLDOWN (kI)
Resistor-Dividers
Switch Control
Digital Controls
49.9
49.9
Table
12
2,