August, 2010, REV2.0
BCT4222B
350MHz DPDT Analog Switch
Features
♦ VCC Operating Range: 1.65V to 4.2V
♦ Rail-to-Rail Signal Range
♦ ON-Resistance Matching: 0.04 Ω (TYP)
♦ ON-Resistance Flatness: 0.08Ω (TYP)
♦ High Off Isolation: 58dB at 10MHz
♦ 54dB (10MHz) Crosstalk Rejection Reduces Signal
Distortion
♦ Break-Before-Make Switching
♦ -3dB Bandwidth: 350MHz
♦ Extended Industrial Temperature Range: –40°C to
85°C
♦ Packaging (Pb-free & Green available)
General Description
The BCT4222B is a high bandwidth, fast double-pole
double-throw (DPDT) analog switch. Its wide
bandwidth and low bit-to-bit skew allow it to pass
high-speed differential signals with good signal
integrity. Each switch is bidirectional and offers little or
no attenuation of the high-speed signals at the outputs.
Industry-leading advantages include a propagation
delay of less than 250ps, resulting from its low channel
resistance and low I/O capacitance. Its high
channel-to-channel crosstalk rejection results in
minimal noise interference.
Pin Description
Applications
Cell Phones
PDAs
Portable Instrumentation
Differential Signal Data Routings
Connection Diagram
Pin
Number
Name
Description
10 S
Select Input
4 GND
Ground
1 , 2 HSD1+,HSD2- Data Ports
7 , 6 HSD1-,HSD2- Data Ports
3 , 5 D+, D-
Data Ports
9 VCC
Positive Power Supply
8 /OE
Output Enable
Logic Function Table
/OE S HSD1+HSD1- HSD2+HSD2-
1
X
OFF
OFF
0 0 ON OFF
0 1 OFF ON
Figure 1. Pin Connections and Logic Diagram
(BCT4222B Top View)
www.broadchip.com
