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Fairchild NC7SBU3157 157 Data Handbook

Summary

The NC7SBU3157/FSAU3157 is a high-performance, low-voltage SPDT Analog Switch ideal for complex analog and digital interface design. Featuring ultra-low on resistance (< 10Ω) and built-in -2V undershoot protection, it ensures signal integrity even under extreme conditions. This technical manual provides comprehensive details on its operation (including electrical specs like VCC range and current limitations), making it a critical resource for electronic engineers designing reliable multiplexer or demultiplexer bus switches into sophisticated systems.

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查询FSAU3157P6X供应商

7S 3157 • F 3157 Tin y L ic Vo ltag e U alo itch ith −2V ersh t P ro tectio

April 2002 Revised January 2003

NC7SBU3157 • FSAU3157 Tiny Logic Low Voltage UHS SPDT Analog Switch with −2V Undershoot Protection General Description Features The NC7SBU3157 or FSAU3157 is a high performance, ■Useful in both analog and digital applications single-pole/double-throw (SPDT) Analog Switch or 2:1 Mul- ■Space saving SC70 6-lead surface mount package tiplexer/Demultiplexer Bus Switch from Fairchild’s Ultra

■Low On Resistance: < 10Ω on typ @ 3.3V VCC

High Speed Series of Tiny Logic. The device is fabricated

with advanced sub-micron CMOS technology to achieve ■Broad VCC operating range: 1.65V to 5.5V

high speed enable and disable times and low On Resis-

■Rail-to-Rail signal handling

tance. The break before make select circuitry prevents dis-

■Power down high impedance control input

ruption of signals on the B Port due to both switches

■Overvoltage tolerance of control input to 7.0V

temporarily being enabled during select pin switching. The

device is specified to operate over the 1.65 to 5.5V VCC ■Break before make enable circuitry

operating range. The control input tolerates voltages up to ■250 MHz - 3d B bandwidth 5.5V independent of the VCC operating range. Fairchild’s integrated Undershoot Hardened Circuit (UHC) senses undershoot at the I/Os, and responds by preventing voltage differentials from developing and turn- ing the switch on.

Ordering Code: Order Package Product Code

Package Description Supplied As

Number Number Top Mark NC7SBU3157P6X MAA06A U7A 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3k Units on Tape and Reel FSAU3157P6X MAA06A U7A 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3k Units on Tape and Reel

Tiny Logic is a registered trademark and UHC is a trademark of Fairchild Semiconductor Corporation.

© 2003 Fairchild Semiconductor Corporation DS500618 www.fairchildsemi.com

Page Summary Contents For Fairchild NC7SBU3157 157 Data Handbook

Page 1 查询FSAU3157P6X供应商 7S 3157 • F 3157 Tin y L ic Vo ltag e U alo itch ith −2V ersh t P ro tectio April 2002 Revised January 2003 NC7SBU3157 • FSAU3157 Tiny Logic Low Voltage UHS SPDT Analog Switch with ...
Page 2 Logic Symbol Connection Diagrams Analog Symbol (Top View) Pin One Orientation Diagram AAA = Product Code Top Mark - see ordering code. Note: Orientation of Top Mark determines Pin One location. Read t...
Page 3 7S 3157 • F Absolute Maximum Ratings(Note 1) Recommended Operating Conditions (Note 3) Supply Voltage (VCC) −0.5V to +7.0V DC Switch Voltage (VS) (Note 2) −0.5V to VCC +0.5V Supply Voltage Operating (...
Page 4 DC Electrical Characteristics (Continued) VCC TA = +25°C TA = −40°C to +85°C Symbol Parameter Units Conditions (V) Min Typ Max Min Max Rflat On Resistance Flatness 5.0 IA = −30 m A, 0 ≤ VBn ≤ VCC (Not...
Page 5 7S 3157 • F Capacitance (Note 12) Figure Symbol Parameter Typ Max Units Conditions Number CIN Control Pin Input Capacitance 2.3 p F VCC = 0V CIO-B B Port Off Capacitance 6.5 p F VCC = 5.0V Figure 8 CI...
Page 6 AC Loading and Waveforms Note: Input driven by 50Ω source terminated in 50Ω Note: CL includes load and stray capacitance Note: Input PRR = 1.0 MHz; t W = 500 ns FIGURE 2. AC Test Circuit FIGURE 3. AC ...
Page 7 7S 3157 • F AC Loading and Waveforms (Continued) FIGURE 5. Charge Injection Test FIGURE 6. Off Isolation FIGURE 7. Crosstalk FIGURE 8. Channel Off Capacitance FIGURE 9. Channel On Capacitance FIGURE 1...
Page 8 Tape and Reel Specification TAPE FORMAT Package Tape Number Cavity Cover Tape Designator Section Cavities Status Status Leader (Start End) 125 (typ) Empty Sealed P6X Carrier Filled Sealed Trailer (Hub...
Page 9 7S 3157 • F Tape and Reel Specification (Continued) REEL DIMENSIONS inches (millimeters) Tape W1 W2 W3 Size www.fairchildsemi.com
Page 10 7S in y L ic lt ag al it ch it 2V er sh ro te ct io Physical Dimensions inches (millimeters) unless otherwise noted 6-Lead SC70, EIAJ SC88, 1.25mm Wide Package Number MAA06A Fairchild does not assume ...

Manual Details

Brand Fairchild
Pages 10
File Size 126.75 KB
Published June 05, 2026
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Frequently Asked Questions

What is the maximum on-resistance of the switch?

It offers Ultra Low On Resistance, which is less than 10Ωm typically @ 3.3V.

How does it protect signals during switching?

The Break before make select circuitry (and UHC®) prevents signal disruption due to both switches and undershoot.

What voltage range must the VCC operate within?

The device is specified to operate over a VCC operating range of 1.65V to 5.5V.

Is this switch suitable for analog or digital uses?

Yes, it is useful in both high performance analog and digital applications.