Product Overview
Toshiba TC5165400BJ-50 Integrated Circuit
Condition
The photo shows a representative unit from our stock. Same or next business day shipping from our Idaho warehouse. Honest pricing, no nonsense. Online since 1999. We are here for our customers, with a no-hassle satisfaction guarantee.
Product Overview
The photographed unit is a rectangular black moulded plastic Toshiba IC with short silver-colored leads along both long edges that turn under the body, marked in four lines of light-coloured text: TOSHIBA B79957 / 9904KBD / JAPAN / TC5165400BJ-50. TC5 is Toshiba's MOS memory prefix in Toshiba's published MOS memory data books; no memory type is assigned to this number here. No Toshiba datasheet for TC5165400 could be located, so this page publishes no organisation, capacity, memory type, access time or pin count; what it publishes is the marking, the reel label and the shelf count of 700 pieces, sold each.
Key Features
- Manufacturer part number TC5165400BJ-50, agreeing across three places: the marking on the photographed body, the TYPE field of the reel label in the photos, and this listing's title
- Body marking on the photographed unit, quoted as printed: "TOSHIBA B79957", "9904KBD", "JAPAN", "TC5165400BJ-50"
- Country of manufacture: the photographed body reads JAPAN and the reel label reads MADE IN JAPAN
- Package as photographed: black moulded plastic rectangular body, short leads on the two long edges only, turned under the body rather than standing out flat; two round moulded depressions in the face and a smaller one at a corner
- Reel label fields as printed: TYPE TC5165400BJ-50, Q'TY 1000 pcs., ADD.C (YE), NOTE 9907KBD-764 9904KBD-236, B79957
- "9904KBD" and "B79957" are quoted exactly as they appear and are not decoded here as date codes or grades
- No Toshiba datasheet for TC5165400 was located in Toshiba documentation or the usual datasheet indexes, so no bit count, word x bit organisation, speed grade reading, supply voltage or lead count is stated
- Check any candidate part against the marked string itself, TC5165400BJ-50 on the body and in the reel label TYPE field, since no published data for this part number was located
Applications
- Repair of assemblies whose bill of materials calls out TC5165400BJ-50 by name
- Exact part number matching where a substitute suffix or speed grade is not acceptable
- Spares stock for Japanese-built boards carrying Toshiba memory-family devices
- Bench identification and cross-reference work against the marked part and lot strings
Frequently Asked Questions
How many should I order? Order the count the build needs. These are sold each, we hold 700 pieces on the shelf. Shipping is $8 flat rate and free on orders over $28, so small parts like this ship smartest as part of a larger order.
What do the strings on the part and the reel label actually tell me? They tell you identity, not specification. The photographed body and the label TYPE field both read TC5165400BJ-50, and both carry B79957, so the part and its reel agree. The label NOTE field reads "9907KBD-764 9904KBD-236", and those two numbers add to the 1000 pcs. the same label states, so that reel was made up from two lots and the photographed unit carries the 9904KBD lot string, the smaller of the two. Our shelf count of 700 is a separate fact, taken at a different time than the label was printed, and we do not reconcile the two. Nothing in either string is read here as a date, a speed or a grade.
A Toshiba chip that states four things about itself and nothing it cannot prove, so if your board calls for TC5165400BJ-50 by name, the marking on this one is the whole answer.
