MC74HC4316AFELG

Overview

The MC74HC4316AFELG is a quad analog switch manufactured by onsemi in the SOEIAJ-16 package. It features separate digital and analog power supplies, with a digital supply range of 2.0 V to 6.0 V and an analog supply range of 2.0 V to 12.0 V. The device provides four independent single-pole single-throw switches with logic-level translators for control inputs. Maximum ON resistance (Ron) ranges from 90 Ω to 240 Ω depending on voltage and temperature. Propagation delays are typically 5 ns to 8 ns at VCC = 4.5 V to 6.0 V. Operating temperatures span from -55°C to +125°C.

Feature Summary

• Features logic-level translators allowing control inputs to operate directly from standard CMOS or LSTTL outputs without external level shifting.
• Provides high linearity of ON resistance over the full analog input voltage range compared to metal-gate CMOS alternatives.
• Includes diode protection on all inputs and outputs to guard against high static voltages and electric fields.

Applications

• Multiplexer and demultiplexer configurations for signal routing.
• Sample-and-hold amplifier circuits requiring precise switching.
• Interface between TTL/NMOS logic and HCMOS analog signals using pull-up resistors.

Procurement Notes

Verify the specific ordering suffix AFELG corresponds to the SOEIAJ-16 tape and reel packaging configuration. Confirm RoHS compliance status as indicated by the 'G' suffix in the manufacturer's documentation. Ensure the component matches the exact pinout and marking diagram provided in the official datasheet before integration into production assemblies.

Selection Notes

Select this component when separate digital and analog supply rails are required to isolate control logic from analog signal paths. The HC4316A is suitable for applications demanding improved ON resistance linearity over traditional metal-gate CMOS switches like the MC14016. Consider the maximum analog voltage swing capability up to 12 V peak-to-peak when designing signal conditioning stages.

Part Context

This device belongs to the High-Speed CMOS (HC) family of analog switches. It serves as a functional equivalent to the older metal-gate MC14016 and MC14066, offering faster propagation speeds and lower ON resistance. The MC74HC4316A is designed to handle bilateral signal flow, making it versatile for both multiplexing and demultiplexing tasks in mixed-signal environments.

Replacement Considerations

Direct replacements include the MC74HC4316AN (PDIP-16) and MC74HC4316ADR2G (SOIC-16). Verify that alternative packages maintain identical electrical characteristics and pin assignments. Cross-reference with the MC14016 or HC4066A only if speed and linearity requirements are less stringent.

FAQ

How does the MC74HC4316A handle unused analog I/O pins?

Unused analog inputs and outputs may be left floating, but it is advisable to tie them to VCC or VEE through a low-value resistor to minimize crosstalk and feedthrough noise pickup.

What is the recommended method for protecting against voltage transients?

External fast turn-on small signal diodes (Dx) should be connected across the analog channels if voltage transients exceeding VCC or below VEE are anticipated.

Can the control inputs interface directly with LSTTL outputs?

Yes, with the addition of pull-up resistors, the control and enable inputs are compatible with LSTTL outputs.