PE4259 datasheet(3/9 Pages) PSEMI

3 / 9 page

Product Specification

PE4259

Page 3 of 9

Document No. 70-0134-08

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Control Voltages

Signal Path

Pin 6 (VDD) = VDD

Pin 4 (CTRL) = High

RFC to RF1

Pin 6 (VDD) = VDD

Pin 4 (CTRL) = Low

RFC to RF2

Table 5. Single-pin Control Logic Truth Table

Table 6. Complementary-pin Control Logic

Truth Table

Control Voltages

Signal Path

Pin 6 (CTRL or VDD) = Low

Pin 4 (CTRL) = High

RFC to RF1

Pin 6 (CTRL or VDD) = High

Pin 4 (CTRL) = Low

RFC to RF2

Control Logic Input

The PE4259 is a versatile RF CMOS switch that

supports two operating control modes; single-pin

control mode and complementary-pin control

mode.

Single-pin control mode enables the switch to

operate with a single control pin (pin 4) supporting

a +3-volt CMOS logic input, and requires a

dedicated +3-volt power supply connection on pin

6 (VDD). This mode of operation reduces the

number of control lines required and simplifies the

switch control interface typically derived from a

CMOS µProcessor I/O port

Complementary-pin control mode allows the

switch to operate using complementary control

pins CTRL and CTRL (pins 4 & 6), that can be

directly driven by +3-volt CMOS logic or a suitable

Processor I/O port. This enables the PE4259 to

be used as a potential alternate source for SPDT

RF switch products used in positive control

voltage mode and operating within the PE4259

operating limits.

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