HEF4051BTT,118

Overview

The HEF4051BTT,118 is an 8-channel analog multiplexer/demultiplexer in a TSSOP16 package. It operates on a supply voltage range of 3.0 V to 15.0 V with an ambient temperature specification from -40 °C to +125 °C. The device features three digital select inputs (S1, S2, S3), eight independent inputs/outputs (Yn), a common input/output (Z), and an active-LOW enable input (E). Static characteristics include an OFF-state leakage current of up to 1000 nA at 15 V for the Z port and 200 nA per channel for Y ports. Dynamic performance includes propagation delays ranging from 10 ns to 300 ns depending on voltage and direction.

Feature Summary

• CMOS technology providing low power dissipation and high noise immunity
• Input clamp diodes enabling interface to voltages exceeding VCC using current limiting resistors
• Fully static operation with standardized symmetrical output characteristics
• ESD protection meeting HBM Class 2 (>2000 V) and CDM Class C3 (>1000 V) standards

Applications

• Analog multiplexing and demultiplexing
• Digital multiplexing and demultiplexing
• Signal gating

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package variant and tape-and-reel specifications. Confirm that the component meets all required environmental and electrical standards for the intended application before finalizing procurement orders.

Selection Notes

Select this component when an 8-channel analog switch is required within a 3 V to 15 V supply range. Ensure the design accommodates the specified ON resistance variations across different supply voltages and verify that the thermal derating requirements for the TSSOP16 package are met under maximum operating conditions.

Part Context

This part belongs to the HEF4051B family of single-pole octal-throw analog switches. It is functionally compatible with other variants in the series but utilizes a TSSOP16 plastic thin shrink small outline package (SOT403-1) instead of standard SOIC packages.

Replacement Considerations

Direct pin-compatible replacements within the same family include HEF4051BT, which uses an SO16 package. Verify package dimensions and lead pitch compatibility if substituting between TSSOP and SOIC form factors.

FAQ

How does the enable input control the switch state?

The enable input (E) is active LOW. When E is HIGH, all switches are turned off regardless of the select inputs. When E is LOW, one of the eight channels is selected based on the binary values of S1, S2, and S3.

What is the maximum allowable input voltage relative to VDD?

The absolute maximum input voltage is limited to VDD + 0.5 V. However, the device includes input clamp diodes that allow interfacing to voltages in excess of VCC when used with current limiting resistors.

What is the typical ON resistance at a 10 V supply?

At a supply voltage (VDD - VEE) of 10 V, the typical ON resistance is 80 Ω when VI = 0 V to VDD - VEE, and 50 Ω when VI = 0 V.