ST STG3693 Low voltage high bandwidth Quad SPDT switch
Summary
The STG3693 is a high-speed quad SPDT CMOS multiplexer switch designed for robust signal routing in portable, low-voltage applications. Offering ultra-low power consumption and operating across an extended voltage range (1.65V to 4.3V), it ensures reliable connectivity even under high-speed digital loads like USB 2.0 signals. This manual provides comprehensive technical details on pin settings, electrical characteristics, absolute maximum ratings, and operational guidelines, making it an essential resource for engineers building demanding digital interconnections that require fast switching speed and excellent ESD immunity.
Page 1 Text Content
STG3693
Low voltage high bandwidth Quad SPDT switch
Features Ultra low power dissipation: ICC = 0.2μA (Max.) at TA = 85°C Low “ON” resistance: RON = 4Ω (TA = 25°C) at VCC = 3.0V Wide operating voltage range:
QFN16L
VCC (Opr) = 1.65V to 4.3V single supply (2.6 x 1.8mm) 4.3V tolerant and 1.8V compatible threshold on digital control input at VCC = 2.3V to 3.0V
Description
Typical bandwidth (-3d B) at 800MHz on all channels
The STG3693 is a high-speed CMOS low voltage
Latch-up performance exceeds 100m A per quad analog SPDT (Single Pole Dual Throw) JESD 78, Class II switch or 2:1 Multiplexer /Demultiplexer Switch
fabricated in silicon gate C2MOS technology. It is
ESD performance exceeds JESD22
designed to operate from 1.65V to 4.3V, making
2000-V Human body model (A114-A)
this device ideal for portable applications.
USB (2.0) high speed (480Mbps) signal
The n SEL inputs are provided to control the
switching compliant
switch. The switch S1 is ON (they are connected to common Ports Dn) when the n SEL input is held high and OFF (high impedance state exists between the two ports) when SEL is held low; the switch S2 is ON (it is connected to common Port D) when the n SEL input is held low and OFF (high impedance state exists between the two ports) when n SEL is held high. Additional key features are fast switching speed, break-before-make delay time and ultra low power consumption. All inputs and outputs are equipped with protection circuits against static discharge, giving them ESD immunity and transient excess voltage.
Table 1. Device summary
Order code Package Packaging
STG3693QTR QFN16L (2.6mm x 1.8mm) Tape and reel
August 2007 Rev 2 1/18
www.st.com
Page Summary Contents For ST STG3693 Low voltage high bandwidth Quad SPDT switch
Manual Details
| Brand | QUAD |
|---|---|
| Pages | 18 |
| File Size | 288.75 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
What is the wide operating voltage range for this device?
The unit operates over a single supply voltage range from 1.65V to 4.3V.
How must I connect the GND exposed pad?
The exposed pad must be soldered to a floating plane and should not be connected to power or ground.
What is the typical performance bandwidth of the channels?
The typical bandwidth (-3dB) for all channels is 800MHz at an 800MHz signal.
How low is the device's maximum current dissipation?
It features ultra low power dissipation, reaching a maximum of –I = 0.2μA at T = 85°C CC A.