Part Review and Datasheet Verification

flux

I’ll review the part metadata, find and attach the official datasheet if needed, then compare symbol, footprint, and pin descriptions against the datasheet.

flux

Completed the part review and documented the detailed findings in 74HC238N Part Review Results (74hc238n-part-review-results). The schematic pinout matches the datasheet, and the footprint appears consistent with DIP16/SOT38-4 at the outline level.
Open items / flags:
  • Package or Case Code is set to TO; it should be DIP16 / SOT38-4.
  • All terminal Pin Type properties are Unspecified; they should ideally be Input, Output, Power, or Ground.
  • Datasheet URL was already set, so I did not overwrite it, but the official Nexperia URL is https://assets.nexperia.com/documents/data-sheet/74HC_HCT238.pdf.
  • Exact pad/drill geometry could not be fully verified from the available layout inspection output.
Suggested next steps:
  1. Update the package property to DIP16 or SOT38-4.
  2. Set datasheet-based pin types for all terminals.
  3. Optionally replace the uploaded datasheet URL with the official Nexperia URL.
Fix properties and review
Fix flagged issues
Verify footprint geometry
Run ERC/DRC
Improve symbol layout
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74HC238N

74HC238N thumbnail
3-to-8 line decoder/demultiplexer
The 74HC238; 74HCT238 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1 and E2 and E3). Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '238 ICs and one inverter. The '238 can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.
• Wide supply voltage range from 2.0 to 6.0 V • CMOS low power dissipation • High noise immunity • Demultiplexing capability • Multiple input enable for easy expansion • Ideal for memory chip select decoding • Active HIGH mutually exclusive outputs • Input levels: • For 74HC238: CMOS level • For 74HCT238: TTL level • Complies with JEDEC standards • JESD8C (2.7 V to 3.6 V) • JESD7A (2.0 V to 6.0 V) • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B • ESD protection: • HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V • CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V • Multiple package options • Specified from -40 °C to +85 °C and from -40 °C to +125 °C
#74HC238N #74HCSeries #CMOSLogic #DecoderIC #Demultiplexer #DigitalLogic #AddressDecoder #ChipSelect #LogicGate #IntegratedCircuit #ElectronicsDesign #EmbeddedSystems

Properties

74HC238N

Nexperia

Integrated Circuit

media.digikey.com/pdf/Data%20Sheets/NXP%20PDFs/74HC(T)238_Rev_Feb2017.pdf

IC

DIP16

parametric-v1

creativecommons.org/licenses/by/4.0/

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