FSA1257L8X

$0.23

Description：LOW RON LOW VOLTAGE DUAL-SPST AN
Series：*

SKU:e7534abb233a Category: Analog Switches, Multiplexers, Demultiplexers Brand: Fairchild Semiconductor

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Product introduction

Product Detailed Parameters

Description：LOW RON LOW VOLTAGE DUAL-SPST AN
Series：*
Mfr：Fairchild Semiconductor
Package：Bulk
Switch Circuit：-
Multiplexer/Demultiplexer Circuit：-
On-State Resistance (Max)：-
Channel-to-Channel Matching (ΔRon)：-
Voltage - Supply, Single (V+)：-
Voltage - Supply, Dual (V±)：-
Switch Time (Ton, Toff) (Max)：-
-3db Bandwidth：-
Charge Injection：-
Channel Capacitance (CS(off), CD(off))：-
Current - Leakage (IS(off)) (Max)：-
Crosstalk：-
Operating Temperature：-
Mounting Type：-
Package / Case：-
Supplier Device Package：-
Number of Circuits：-
Grade：-
Qualification：-

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FSA1257L8X

Overview

The FSA1257L8X is a dual single-pole single-throw (SPST) analog switch manufactured by onsemi, formerly Fairchild Semiconductor. It operates within a supply voltage range of 1.65 V to 5.5 V and features a maximum on-resistance of 1.15 Ohms. The device supports a switching DC current of 200 mA with a maximum power dissipation of 180 mW. Electrical performance includes a maximum turn-on time of 35 ns and a maximum turn-off time of 15 ns. It functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

Dual SPST configuration for independent signal path control
Low on-resistance for minimal signal attenuation
Compatible with low-voltage digital logic interfaces

Applications

Portable consumer electronics requiring low-power signal routing
Battery-powered devices utilizing low-voltage operation
Signal multiplexing in compact mobile systems

Procurement Notes

Verify component authenticity through authorized distribution channels due to the manufacturer's acquisition history. Confirm RoHS compliance status via official documentation before integration. Ensure the MicroPak-8 package orientation matches PCB layout requirements. Validate that the obsolete lifecycle status does not conflict with long-term production plans.

Selection Notes

Select this component when dual isolated signal paths are required in space-constrained designs. The low on-resistance ensures signal integrity for audio or data lines. Verify that the 1.65 V minimum supply voltage aligns with the system's power rail. Consider the 8-pin MicroPak footprint during mechanical design constraints.

Part Context

This part belongs to the FSA1257 series of low-voltage analog switches. The 'L8X' suffix indicates the specific MicroPak-8 packaging and reel/cut-tape shipping format. The device represents the transition period between Fairchild Semiconductor and onsemi product portfolios.