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ET3157
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Product Detailed Parameters
- Description：Single SPDT
- Series：-
- Mfr：ETEK MICROELECTRONICS
- Package：Tape & Reel (TR)
- Switch Circuit：SPDT - Open/Closed
- Multiplexer/Demultiplexer Circuit：2:01
- On-State Resistance (Max)：10Ohm
- Channel-to-Channel Matching (ΔRon)：300mOhm
- Voltage - Supply, Single (V+)：1.8V ~ 5.5V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：8ns (Typ), 6ns (Typ)
- -3db Bandwidth：250MHz
- Charge Injection：7pC
- Channel Capacitance (CS(off), CD(off))：4.5pF
- Current - Leakage (IS(off)) (Max)：100nA
- Crosstalk：-54dB @ 10MHz
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：6-VSSOP, SC-88, SOT-363
- Supplier Device Package：SC70-6
- Number of Circuits：1
- Grade：-
- Qualification：-
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Overview
The ET3157 is an advanced CMOS analog switch manufactured using silicon gate CMOS technology by Etek Microelectronics. It operates within a supply voltage range of 1.65 V to 5.5 V and supports signal frequencies up to 250 MHz. The device features low on-resistance, specified as 3.0 Ω at VCC = 4.5 V, and includes break-before-make circuitry to prevent unexpected shorts. It is available in compact SC70-6 or DFN6 packages and functions reliably across an operating temperature range of -40°C to +85°C.
Feature Summary
- Break-before-make switching mechanism prevents unintended short circuits during state transitions
- High bandwidth capability supporting signal frequencies up to 250 MHz with improved linearity
- Low power consumption suitable for portable electronic applications
- Compatible with standard CMOS logic levels for control inputs
Applications
- NTSC/PAL video signal routing
- Audio signal path switching
- SPDIF and HDTV interface connections
Procurement Notes
Verify the manufacturer designation carefully, as the ET3157 part number is also associated with other vendors such as SGMicro (SGM3157) and STMicroelectronics (STG3157). Confirm that the specific component matches the Etek Microelectronics datasheet specifications regarding package type and electrical characteristics before procurement.
Selection Notes
Select this component when designing systems requiring high-speed analog switching with low insertion loss. Ensure the design accommodates the 1.65 V to 5.5 V supply range and utilizes the appropriate small outline package (SC70-6 or DFN6) for space-constrained layouts. Verify thermal management requirements for the -40°C to +85°C operational range.
Part Context
The ET3157 belongs to the family of single-pole double-throw (SPDT) analog switches. These devices are commonly used in multiplexing and demultiplexing applications where signal integrity and fast switching speeds are critical. The CMOS technology ensures compatibility with digital control logic while maintaining low power dissipation.
Replacement Considerations
Public confirmed substitute part numbers include SGM3157 and STG3157. Verify pinout compatibility and electrical parameter alignment with the original ET3157 specifications before substitution.
