MAX14600_12 Datasheet, PDF (11/16 Pages) Maxim Integrated Products – USB Host Charger Identification/Adapter Emulators

MAX14600–MAX14605/MAX14618
USB Host Charger Identification/Adapter Emulators
Detailed Description
The MAX14600–MAX14605 and MAX14618 adapter
emulator family has Hi-Speed USB analog switches that
support USB hosts to identify the USB port as a charger
port when the USB host is in a low-power mode and
cannot enumerate USB devices. These Hi-Speed USB
switches feature low 4pF (typ) on-capacitance and low
3.5I (typ) on-resistance. DP and DM can handle signals
between 0V and 6V with any supply voltage.
Resistor-Dividers
The MAX14600–MAX14605/MAX14618 family features
an internal resistor-divider for biasing data lines to pro-
vide support for Apple^-compliant devices. When the
MAX14600–MAX14605/MAX14618 family is not oper-
ated with the resistor-divider, the device disconnects
the resistor-dividers from the supply voltage to minimize
supply current requirements. The resistor-dividers are not
connected in pass-through mode.
Switch Control
The MAX14600–MAX14605/MAX14618 family features
dual digital inputs, CB0 and CB1, for mode selection.
For the MAX14600/MAX14601/MAX14603/MAX14604,
connect CB0 and CB1 to a logic-level low voltage for
autodetection charger mode (AM). Change only CB1 to a
logic-level high for forced dedicated charger mode (FM).
Change only CB1 to a logic-level low for normal high-
speed pass-through mode (PM). Connect CB0 and CB1
to a logic-level high for high-speed pass-through mode
with CDP emulation (CM). See Table 1.
For the MAX14618, connect CB0 to a logic-level low volt-
age for autodetection charger mode (AM). Change CB0
to a logic-level high voltage and CB1 to a logic-level low
voltage to place the MAX14618 in normal high-speed
pass-through charger mode (PM). Connect CB0 and
CB1 to a logic-level high for high-speed pass-through
mode with CDP emuation (CM). See Table 2.
In CDP emulation mode, the peripheral device with
CDP detection capability draws the charging current
Table 1. Digital Input State for MAX14600/MAX14601/MAX14603/MAX14604
CB0
0
0
1
1
CB1
0
1
0
1
CHARGER/USB
Charger
Charger
USB
USB
MODE
AM
FM
PM
CM
STATUS
Autodetection Charger Mode
Force Dedicated Charger Mode: DP/DM shorted.
USB Pass-Through Mode: DP/DM connected to TDP/TDM.
USB Pass-Through Mode with CDP Emulation: Auto connects DP/DM to
TDP/TDM depending on CDP status.
Table 2. Digital Input State for MAX14618
CB0
0
1
1
CB1
X
0
1
CHARGER/USB
Charger
USB
USB
MODE
AM
PM
CM
STATUS
Auto detection Charger Mode with Remote Wake-Up
USB Pass-Through Mode: DP/DM connected to TDP/TDM.
USB Pass-Through Mode with CDP Emulation: Auto connects DP/DM to
TDP/TDM depending on CDP status.
Table 3. Digital Input State for MAX14602/MAX14605
CB0
0
1
CHARGER/USB
Charger
USB
MODE
AM
CM
STATUS
Autodetection Charger Mode
USB Pass-Through Mode with CDP Emulation: Auto connects DP/DM to TDP/TDM
depending on CDP status.
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