BCT4257
Low-Voltage,2.8 Ω
SPDT Analog Switch
BCT4257
Low-Voltage, 2.8Ω SPDT Analog Switch
General Description
The BCT4257 is a high-bandwidth, fast single pole
double-throw (SPDT) CMOS switch. It can be used as an
analog switch or as a low-delay bus switch. Specified over
a wide operating power supply voltage range, 1.65V to 5.5V,
the BCT4257 has a maximum ON resistance of 5.1-ohms
at 1.65V, 3.9-ohms at 2.3V & 2.85-ohms at 4.5V.
Break-before-make switching prevents both switches being
enabled simultaneously. This eliminates signal disruption
during switching.
The control input, S, tolerates input drive signals up to 5.5V,
independent of supply voltage.
Applications
Cell Phones
PDAs
Portable Instrumentation
Battery Powered Communications
Computer Peripherals
Connection Diagram(Top View)
DFN1.1x0.9-6L
Y1 1
6
S
GND 2
5 VCC
Y0 3
4Z
Features
♦CMOS Technology for Bus and Analog Applications
♦ Low ON Resistance: 3-ohms @ 2.7V
♦ Wide VCC Range: 1.65V to 5.5V
♦ Rail-to-Rail Signal Range
♦ Control Input Overvoltage Tolerance: 5.5V min.
♦ High Off Isolation: 57dB at 10MHz
♦ 54dB (10MHz) Crosstalk Rejection Reduces Signal
Distortion
♦ Break-Before-Make Switching
♦ High Bandwidth: 300 MHz
♦ Extended Industrial Temperature Range: –40°C to 85°C
♦ Packaging: DFN1.1x0.9-6L (Pb-free & Green available)
Pin Description
Name
Y1
GND
Y0
Z
VCC
S
Description
Independent input or output
Ground
Independent input or output
Common output or input
Supply voltage
Select input
Logic Function Table
Logic Input (S)
0
1
Function
Y0 Connected to Z
Y1 Connected to Z
ORDERING INFORMATION
Ordering Code
BCT4257ELT-TR
Package Description
DFN1.1x0.9-6L
Temp Range
–40°C to +85°C
Top Marking
AAB
REV1.2
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