MAX14600 Datasheet, PDF (11/16 Pages) Maxim Integrated Products – USB Host Charger Identification/Adapter Emulators Greater User Flexibility

MAX14600–MAX14605
USB Host Charger Identification/Adapter Emulators
Detailed Description
The MAX14600–MAX14605 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 4I (typ) on-resistance. DP
and DM can handle signals between 0V and 6V with any
supply voltage.
Resistor-Dividers
The MAX14600–MAX14605 family features an internal
resistor-divider for biasing data lines to provide sup-
port for Apple^-compliant devices. When the MAX14600–
MAX14605 family is not operated with the resistor-divider,
the device disconnects the resistor-dividers from the sup-
ply voltage to minimize supply current requirements. The
resistor-dividers are not connected in pass-through mode.
Switch Control
The MAX14600–MAX14605 family features dual digi-
tal inputs, CB0 and CB1, for mode selection. For the
MAX14600/MAX14601/MAX14603/MAX14604, connect
CB0 and CB1 to a logic-level low voltage for autode-
tection 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.
In CDP emulation mode, the peripheral device with
CDP detection capability draws the charging current
up to 1.5A immediately without USB enumeration. The
MAX14602/MAX14605 have CB0 digital input control
only (Table 2). The MAX14602/MAX14605 are pin-to-pin
compatible with the MAX14566E, and CB0 and CB1
are connected together internally, which makes these
devices easy upgrades for CDP emulation.
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 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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