TS3A4741_15 Datasheet, PDF (14/26 Pages) Texas Instruments – TS3A474x 0.9-Ω Low-Voltage Single-Supply 2-Channel SPST Analog Switches

TS3A4741, TS3A4742
SCDS228E – AUGUST 2006 – REVISED DECEMBER 2014
8 Detailed Description
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8.1 Overview
The TS3A4741 and TS3A4742 are bi-directional, 2-channel single-pole/single-throw (SPST) analog switches with
low ON-state resistance (R_on), low-voltage, that operate from a single 1.6-V to 3.6-V supply. These devices have
fast switching speeds, handle rail-to-rail analog signals, and consume very low quiescent power.
The digital logic input is 1.8-V CMOS compatible when using a single 3-V supply.
The TS3A4741 has two normally open (NO) switches, and the TS3A4742 has two normally closed (NC)
switches.
8.2 Functional Block Diagram
SPST
NO1
COM1
IN1
SPST
NO2
COM2
IN2
8.3 Feature Description
The TS3A4741 and TS3A4742 has a low on resistance and high current handling capability up to 100 mA
continuous current so it can be used for power sequencing and routing with minimal losses. The switch is also bi-
directional with fast switching times in the 10 ns range which allows data acquisition and communication between
multiple devices.
With a 3-V supply these devices are compatible with standard 1.8-V CMOS logic.
8.4 Device Functional Modes
Table 1. Function Table
IN
NO to COM, COM to NO
(TS3A4741)
NC to COM, COM to NC
(TS3A4742)
L
OFF
ON
H
ON
OFF
14
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