Lot of 10 Texas Instruments 851380TS 158-2604 Custom DIP-14 ICs NOS

ITEM SPECIFICS
Brand: Texas Instruments
Model: 851380TS
MPN: 851380TS
Additional Marking: 158-2604
Other Markings: BP, A 8001 H
Type: Custom Integrated Circuit
Package Type: Dual In-Line Package
Number of Pins: 14
Mounting Style: Through-Hole
Country/Region of Manufacture: Malaysia
Quantity: 10
Lot Size: 10 Integrated Circuits
Vintage: Yes
Condition: New old stock

DESCRIPTION
Bulk lot of ten matching vintage Texas Instruments custom-marked ICs (158-2604 / BP 851380TS), at a lower per-unit cost than buying singly. Built for vintage computer restorers, repair shops, and collectors who need several identical spares of this hard-to-find house-marked part rather than sourcing one at a time. Each component has a 14-pin through-hole dual in-line package and was manufactured in Malaysia.

Features:
Lot of 10
Texas Instruments
Marking 851380TS
Marking 158-2604
14-Pin DIP Package
Through-Hole Mounting
Made in Malaysia

Vintage Electronic Components
The precise function, programming, specifications, and equipment compatibility of these custom-marked integrated circuits could not be conclusively verified. Buyers should compare all markings and photos with their original components before purchasing.

These components are new old stock from long-term storage. They have not been tested and may show cosmetic oxidation, discoloration, or storage wear on the leads. Please review all photos for the exact condition and markings.

COMPATIBILITY & CROSS-REFERENCE
Texas Instruments custom-marked 14-pin DIP IC with markings 851380TS, 158-2604, BP, and A 8001 H. The function could not be verified, and no direct replacement or cross-reference part number has been identified.
The markings 158 2604 and 851380 have been reported on IBM System/23 Datamaster keyboard boards in hobbyist teardown photos. This is not confirmed by the manufacturer. Compare the markings, 14-pin DIP package, and pin configuration against your board before installing.

Q&A
Q: What does the Texas Instruments 851380TS do?
A: The function could not be verified. It is a custom-marked 14-pin through-hole DIP IC.
Q: Where have the 158-2604 and 851380 markings been seen?
A: They have been reported on IBM System/23 Datamaster keyboard boards in hobbyist teardown photos. This is not manufacturer-confirmed.
Q: What replaces a Texas Instruments 851380TS?
A: No cross-reference has been identified. These ICs fit a board only if it used the same markings.
Q: How many ICs are included?
A: 10 pieces per lot.
Q: Is the lot cheaper per unit than buying singles?
A: Yes. The lot has a lower per-unit cost than buying the 851380TS individually.

DISCLAIMER
These items are new old stock and have not been tested. They may show cosmetic wear, oxidation, or discoloration from long-term storage and handling. No functional testing or compatibility verification has been performed. Ships fast with tracking. 30-day returns accepted; buyer pays return shipping.

LEGAL DISCLAIMER
We are not an authorized distributor, reseller, or representative of Texas Instruments or IBM. All product names, trademarks, brands, and logos are the property of their respective owners. Products are sourced from surplus inventory and are not covered by manufacturer warranties.

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