MAX4906EF Datasheet, PDF (1/15 Pages) Maxim Integrated Products – High-/Full-Speed USB 2.0 Switches with High ESD

19-0613; Rev 1; 11/07
High-/Full-Speed USB 2.0 Switches
with High ESD
General Description
The MAX4906EF are electrostatic discharge (ESD)-pro-
tected analog switches that combine low on-capacitance
(C_ON) and low on-resistance (R_ON) necessary for high-
performance switching applications. The COM_ inputs
are protected against ±15kV ESD without latchup or dam-
age. The device is designed for USB 2.0 high-speed
applications at 480Mbps. The switches also handle all the
requirements for USB low- and full-speed signaling.
The MAX4906EF features two single-pole/double-throw
(SPDT) switches. The device is fully specified to operate
from a single +2.7V to +3.6V power supply and is protect-
ed against a +5.5V short to all analog inputs (COM_, NC_,
NO_). This feature makes the MAX4906EF fully compliant
with the USB 2.0 specification of +5.5V fault protection.
The device features a low threshold voltage and a +1.4V
V_IH, permitting them to be used with low-voltage logic.
The device features a QP input that when driven high,
turns the charge pump off and sets the device in standby
mode. When the device is in standby mode, the quies-
cent supply current is reduced to 3µA (max) and the
switches remain operable.
The MAX4906EF is available in a space-saving, 2mm x
2mm µDFN package and operates over a -40°C to +85°C
temperature range.
Applications
USB Switching
Cell Phones
PDAs
Digital Still Cameras
GPS
Notebook Computers
Relay Replacements
Ethernet Switching
Video Switching
Bus Switches
T3/E3 Switches for
Redundancy Protection
Features
♦ ±15kV (Human Body Model) ESD Protection,
on COM_
♦ Fully Specified for a Single +2.7V to +3.6V
Power-Supply Voltage
♦ Low 4Ω (typ), 7Ω (max) On-Resistance (R_ON)
♦ -3dB Bandwidth: 500MHz (typ)
♦ Low Bit-to-Bit Skew ≤ 20ps
♦ Charge-Pump Noise = 90µV (typ)
♦ Charge-Pump Enable
♦ No Need for Logic-Level Shifters for 1.4V or
Above
♦ COM_{_} Analog Inputs Fault-Protected Against
Shorts to USB Supply Rail Up to +5.5V
♦ Low Supply Current 3µA (max) in Standby
♦ Space-Saving 10-Pin, 2mm x 2mm µDFN Package
Ordering Information
PART
PIN-PACKAGE
TOP
MARK
PKG
CODE
MAX4906EFELB+T 10 µDFN-10
AAJ
L1022-1
Note: The device operates over the -40°C to +85°C operating
temperature range.
+Denotes a lead-free package.
Typical Operating Characteristics
EYE DIAGRAM
V+ = 3.3V
I_BIAS = 9mA
UI = 2.08ns
V_NO1OUT
USB 2.0
HIGH SPEED
TRANSMIT
TEMPLATE
100mV/div
Pin Configuration
TOP VIEW
IN
QP
GND
COM1
COM2
+
1
2
3 _MAX4906EF
4
5
10 V+
9 NC1
8 NC2
7 NO1
6 NO2
200ps/div
V_NO2OUT
μDFN
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.