Datasheet

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March 2010 Doc ID 11932 Rev 3 1/15

STG3856

Low voltage 1.0 Ω max dual SP3T switch

with break-before-make feature

Features

■ High speed:

–t

= 0.3 ns (typ.) at V

=3.0V

–t

= 0.4 ns (typ.) at V

=2.3V

■ Ultra low power dissipation:

–I

=0.2µA (max.) at T

=85°C

■ Low ON resistance V

=0V:

–R

=1.0Ω (max. T

=25°C) at

=4.3V

–R

=1.5Ω (max. T

=25°C) at

=3.0V

–R

=1.8Ω (max. T

=25°C) at

=2.3V

■ Wide operating voltage range:

–V

(opr) = 1.65 V to 4.3 V single supply

■ 4.3 V tolerant and 1.8 V compatible threshold

on digital control input at V

= 2.3 to 4.3 V

■ Latch-up performance exceeds 300 mA

(JESD 17)

■ ESD performance (analog channel vs. GND):

HBM > 2 kV (MIL STD 883 method 3015)

Description

The STG3856 is a high-speed CMOS low voltage

dual analog SP3T (single pole triple throw) switch

or dual 3 : 1 multiplexer /demultiplexer switch

fabricated in silicon gate C

MOS technology. It is

designed to operate from 1.65 V to 4.3 V, making

this device ideal for portable applications.

The device offers very low ON resistance

(< 1.0 Ω) at V

= 4.3 V. The disabling and

enabling of switches are done by setting the 1IN

and 2IN control pins. Additional key features are

fast switching speed, 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.

QFN12L

Table 1. Device summary

Order code Temperature range Package Packaging

STG3856QTR -40°C to +85°C QFN12L (2.2 x 1.4 mm) Tape and reel

www.st.com

Summary of content (15 pages)

PAGE 1
STG3856 Low voltage 1.0 Ω max dual SP3T switch with break-before-make feature Features ■ High speed: – tPD = 0.3 ns (typ.) at VCC = 3.0 V – tPD = 0.4 ns (typ.) at VCC = 2.3 V ■ Ultra low power dissipation: – ICC = 0.2 µA (max.) at TA = 85°C ■ Low ON resistance VIN = 0 V: – RON = 1.0 Ω (max. TA = 25°C) at VCC = 4.3 V – RON = 1.5 Ω (max. TA = 25°C) at VCC = 3.0 V – RON = 1.8 Ω (max. TA = 25°C) at VCC = 2.3 V QFN12L Description ■ Wide operating voltage range: – VCC (opr) = 1.65 V to 4.
PAGE 2
Summary description STG3856 1 Summary description 1.1 Pin connections and description Figure 1. Connection diagram (top through view) IN1 12 Table 2. 1.
PAGE 3
STG3856 1.3 Summary description Internal schematic Figure 2. 1.4 Internal schematic Input equivalent circuit Figure 3.
PAGE 4
Maximum ratings 2 STG3856 Maximum ratings Stressing the device above the rating listed in the “absolute maximum ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 4.
PAGE 5
STG3856 3 Electrical characteristics Electrical characteristics Table 5. Recommended operating conditions Symbol VCC Parameter Supply voltage (1) Value Unit 1.4 to 4.3 V VI Input voltage 0 to VCC V VIC Control input voltage 0 to VCC V VO Output voltage 0 to VCC V TOP Operating temperature -55 to 125 °C dt/dv Input rise and fall time control input VCC = 1.65 V to 2.7 V 0 to 20 ns/V VCC = 3.0 to 4.3 V 0 to 10 1. Truth table guaranteed: 1.2 V to 4.3 V. 3.
PAGE 6
Electrical characteristics Table 6. STG3856 DC electrical characteristics (continued) Test condition Symb ol TA = 25°C Parameter VCC (V) 4.3 3.0 RON Switch ON resistance 2.7 2.3 1.8 VS = 0 V to VCC IS = 100 mA 1.65 ON resistance ΔRON match between channels 2.7 VS at R ON max IS = 100 mA 4.3 ON resistance RFLAT flatness (1)(2) 3.0 2.7 2.3 VS = 0 V to VCC IS = 100 mA 1.65 IOFF Value OFF state leakage current (nSN), (Dn) -40 to 85°C -55 to 125°C Min Typ Max Min Max Min Max – 0.
PAGE 7
STG3856 Electrical characteristics 3.2 AC electrical characteristics Table 7. AC electrical characteristics (CL = 35 pF, RL = 50 Ω, tr = tf ≤ 5 ns) Test condition Symbol tPLH, tPHL Parameter Propagation delay Turn-ON time TA = 25°C VCC Typ Max Min Max Min Max 1.65 1.95 – 0.45 – – – – – 2.3 - 2.7 – 0.40 – – – – – 3.0 - 3.3 – 0.30 – – – – – 3.6 - 4.3 – 0.
PAGE 8
Electrical characteristics STG3856 3.3 Analog switch Table 8. Analog switch characteristics (CL = 5p F, RL = 50 Ω, TA = 25°C) Test condition Symbol Parameter Value TA = 25°C VCC (V) -40 to 85°C -55 to 125°C Unit Min Typ Max Min Max Min Max OIRR Off Isolation (1) 1.65 - 4.3 VS = 1VRMS f = 100 kHz – -82 – – – – – dB Xtalk Crosstalk 1.6 - 4.3 VS = 1 VRMS f = 100 kHz – -84 – – – – – dB THD Total harmonic distortion 2.3 - 4.
PAGE 9
STG3856 4 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Figure 4. QFN12L (2.2 x 1.
PAGE 10
Package mechanical data Table 9. STG3856 FN12L (2.2 x 1.4 mm) mechanical data Millimeters Inches Symbol Min Typ Max Min Typ Max A 0.50 0.55 0.60 0.019 0.021 0.023 A1 0 0.02 0.05 0 0.001 0.002 b 0.15 0.20 0.25 0.006 0.007 0.010 D 1.30 1.40 1.50 0.051 0.055 0.059 E 2.10 2.20 2.30 0.082 0.086 0.090 e L Figure 5. 10/15 0.40 0.35 0.40 0.015 0.45 Footprint recommendation Doc ID 11932 Rev 3 0.013 0.015 0.
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STG3856 Package mechanical data Figure 6. QFN12L (2.2 x 1.
PAGE 12
Package mechanical data Figure 7. 12/15 STG3856 QFN12L (2.2 x 1.
PAGE 13
STG3856 Package mechanical data Figure 8. QFN12L (2.2 x 1.
PAGE 14
Revision history 5 STG3856 Revision history Table 10. 14/15 Document revision history Date Revision Changes 22-Dec-2005 1 First draft. 23-Dec-2005 2 Few changes. 15-Mar-2010 3 The document has been reformatted, added tape and reel information.
PAGE 15
STG3856 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.