MAX4906EFELB-T Maxim Integrated, MAX4906EFELB-T Datasheet - Page 11

• Manufacturer Part Number: MAX4906EFELB-T
• Description: Power Switch ICs - USB
• Manufacturer: Maxim Integrated

Specifications of MAX4906EFELB-T

• Supply Voltage - Min: 2.7 V
• Supply Voltage - Max: 3.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Switches: Dual
• Switch Configuration: SPDT

rail-to-rail minimizes power consumption. With a +2.7V
to +3.6V supply voltage range, the device is +1.4V
logic compatible.
The on-resistance of the MAX4906EF is very low and sta-
ble as the analog input signals are swept from ground to
V+ (see the Typical Operating Characteristics ). These
switches are bidirectional, allowing NO_, NC_, and
COM_ to be configured as either inputs or outputs.
The MAX4906EF features +5.5V fault protection to
all analog inputs. Fault protection prevents these
switches from being damaged due to shorts to the USB
bus voltage rail.
The MAX4906EF features a charge-pump enable mode
that improves the performance and the dynamic range
of the device. The device features a QP input that when
driven high, turns the charge pump off and sets the
Functional Diagram/Truth Table
NO1
NC1
NO2
NC2
IN
QP
0
0
1
1
IN
0
1
0
1
V+
Overvoltage Fault Protection
______________________________________________________________________________________
NO1
NO2
OFF
OFF
ON
ON
MAX4906EF
GND
NC1
NC2
OFF
OFF
ON
ON
MAX4906EF
Analog Signal Levels
Charge-Pump Enable
HIGH PERFORMANCE
HIGH PERFORMANCE
LOW PERFORMANCE
LOW PERFORMANCE
High-/Full-Speed USB 2.0 Switches
QP
COM1
COM2
device in standby mode. When the device is in standby
mode, the quiescent supply current is reduced to 3µA
(max) and the switches remain operable. When QP is
driven low, the charge pump is enabled and the switch-
es enter an improved high-performance mode.
The MAX4906EF analog switch is fully compliant with
the USB 2.0 specification. The low on-resistance and
low on-capacitance of these switches make the device
ideal for high-performance switching applications. The
MAX4906EF is ideal for routing USB data lines (see
Figure 7) and for applications that require switching
between multiple USB hosts (see Figure 8). The
MAX4906EF also features +5.5V fault protection to
guard systems against shorts to the USB bus voltage
that is recommended for all USB applications.
The wide bandwidth of the MAX4906EF meets the needs
of 10/100 Ethernet switching. The device switch the sig-
nals from two interface transformers and connect the sig-
nals to a single 10/100 Base-T Ethernet PHY, simplifying
docking station design and reducing manufacturing
costs.
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against electrostatic
discharges encountered during handling and assembly.
COM_ are further protected against static electricity.
Maxim’s engineers have developed state-of-the-art
structures to protect these pins against ESD up to
±15kV without damage. The ESD structures withstand
high ESD in normal operation, and when the device is
powered down. After an ESD event, the MAX4906EF
continues to function without latchup, whereas compet-
ing products can latch and must be powered down to
restore functionality.
ESD protection can be tested in various ways. The ESD
protection of COM_ are characterized for ±15kV
(Human Body Model) using the MIL-STD-883.
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Figure 9a shows the Human Body Model and Figure 9b
shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
Applications Information
with High ESD
±15kV ESD Protection
Ethernet Switching
ESD Test Conditions
Human Body Model
USB Switching
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