UM4717_16 Datasheet, PDF (10/16 Pages) Union Semiconductor, Inc. – 4.5(OHM) 300MHz Bandwidth Dual SPDT Analog Switch

UM4717/UM4717Q
Detailed Description
The UM4717/UM4717Q high-speed, low-voltage, low on-resistance (R_ON), dual SPDT analog
switch operates from a single +1.8V to +5.5V supply. The switch features break-before-make
switching operation and fast switching speeds (t_ON=80ns (max), t_OFF=40ns (max)).
The switch has low 15pF on-channel capacitance, which allows for 12Mbps switching of the data
signals for USB 1.0/1.1 applications. The UM4717/UM4717Q is designed to switch D₊ and D_-
USB signals with a guaranteed skew of less than 2ns (see Figure 4) as measured from 50% of the
input signal to 50% of the output signal.
Applications Information
Digital Control Inputs
The UM4717/UM4717Q logic inputs accept up to +5.5V regardless of supply voltage. For
example, with a +3.3V supply, IN_ can be driven low to GND and high to +5.5V allowing for
mixing of logic levels in a system. Driving the control logic inputs rail-to-rail minimizes power
consumption. For a +3V supply voltage, the logic thresholds are 0.5V (low) and 1.4V (high); for a
+5V supply voltage, the logic thresholds are 0.8V (low) and 2.0V (high).
Analog Signal Levels
The on-resistance of the UM4717/UM4717Q changes very little for analog input signals across
the entire supply voltage range (see the Typical Operating Characteristics). The switches are
bidirectional, so the NO_, NC_, and COM_ pins can be either inputs or outputs.
Power-Supply Sequencing and Over-Voltage Protection
Proper power-supply sequencing is recommended for all CMOS devices. Always apply V₊ before
applying analog signals, especially if the analog signal is not current-limited.
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http://www.union-ic.com Rev.14 Apr.2016
10/16