Part Verification Review

Created a project doc

Part Verification Report: SN74HC123N

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Date: 2026-07-17 Project: silicon-yard/sn74hc123n

flux

Completed the review and saved the full findings in Part Verification Report: SN74HC123N. The main issue is a part-identity mismatch: the project is labeled SN74HC123N, but the populated datasheet and key specs match TI’s SNx4AHCT123A family; the pin order and PDIP-16 footprint look broadly compatible, but pin types/descriptions are incomplete.
Open items:
  • Datasheet URL was already set, so I did not change it.
  • I filed an internal part-quality report for the metadata/datasheet mismatch.
Suggested next steps:
  1. Decide whether this part should be SN74AHCT123AN, SN74AHC123AN, CD74HC123E, or a verified SN74HC123N.
  2. Update the MPN/datasheet/description to the selected family.
  3. Add terminal Pin Type and Pin Description properties from the correct datasheet.
A

adrian95

Use SN74AHC123AN and update the part metadata against the official AHC datasheet.

flux

I’ll switch the part identity to SN74AHC123AN, use TI’s official AHC datasheet, update the key metadata and terminal properties, then verify the changes.

flux

Part name, description, datasheet URL, MPN, manufacturer, package, and key operating metadata are updated to SN74AHC123AN; now I’m filling in the terminal pin types/descriptions.

flux

Updated the part to SN74AHC123AN and verified it against TI’s official SNx4AHC123A datasheet. Metadata now reflects the AHC part, 2 V–5.5 V operating range, PDIP-16 N package, TI manufacturer, and the terminal pin types/descriptions are populated from the datasheet.
Open items:
  • None.
Suggested next steps:
  1. Review/publish the updated part.
  2. Optionally re-run a full part QA review before using it in another design.
QA, export and report
Run part QA
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Files

Pins

Symbol

Layout

3D View

Name
Pin #
Type
Part Type
Pin Description
Pin Group
1~A
1
Input
Terminal
Channel 1 falling-edge trigger input when 1B is high; hold low for other input methods.
Control Bus
1B
2
Input
Terminal
Channel 1 rising-edge trigger input when 1A is low; hold high for other input methods.
Control Bus
1~CLR
3
Input
Terminal
Channel 1 clear/trigger input; can terminate output pulse early by driving low.
Control Bus
1~Q
4
Output
Terminal
Channel 1 inverted output (Q-bar).
DATA
2Q
5
Output
Terminal
Channel 2 non-inverted output.
DATA
2CEXT
6
Passive
Terminal
Channel 2 external timing capacitor negative connection.
Timer
2REXT/CEXT
7
Passive
Terminal
Channel 2 external timing resistor/capacitor junction connection.
Timer
GND
8
Ground
Terminal
Ground reference.
GND
2~A
9
Input
Terminal
Channel 2 falling-edge trigger input when 2B is high; hold low for other input methods.
Control Bus
2B
10
Input
Terminal
Channel 2 rising-edge trigger input when 2A is low; hold high for other input methods.
Control Bus
2~CLR
11
Input
Terminal
Channel 2 clear/trigger input; can terminate output pulse early by driving low.
Control Bus
2~Q
12
Output
Terminal
Channel 2 inverted output (Q-bar).
DATA
1Q
13
Output
Terminal
Channel 1 non-inverted output.
DATA
1CEXT
14
Passive
Terminal
Channel 1 external timing capacitor negative connection.
Timer
1REXT/CEXT
15
Passive
Terminal
Channel 1 external timing resistor/capacitor junction connection.
Timer
VCC
16
Power In
Terminal
Positive supply input, VCC operating range 2 V to 5.5 V for SN74AHC123A family.
VCC

SN74AHC123AN