Rochester Electronics, LLC 2907PC

The AMD Am2907 family combines four registered open-collector bus drivers, four receiver channels with output latches and an odd four-bit parity checker/generator. It was intended for high-speed bipolar or MOS microprocessor bus systems. Rochester's 2907PC is described by distributor indexes as an AM2907-class part, but family-level electrical limits must not be treated as the supplied lot's controlled specification until provenance is documented.

AMD's Am2907 reference describes a 20-pin DIP family package and third-party Rochester listings describe 2907PC as plastic DIP/PDIP. The local catalog package field is blank. A 20-DIP entry is recorded in the local package register, but the actual Rochester lot must be matched to a controlled pinout, body width and lead finish. The local 20-DIP JPG is missing.

Assembly checks

• Verify the original marking and twenty physical leads.
• Confirm pin one, row spacing and board footprint.
• Check plating and solderability of legacy inventory.

The missing JPG and unverified exact package block publication.

AMD's Am2907 functional diagram names A[3:0] driver data inputs, BUS[3:0] bidirectional bus nodes, and receiver outputs. DRCP clocks the driver register; BE controls bus drive; RLE latches receive data; OE controls the three-state receiver outputs. A parity output reports the odd-parity function. These are family signal names only. Obtain the controlled 2907PC 20-pin top view before assigning physical pins.

Do not transfer pin numbers from a different 2907 suffix without a matching manufacturer drawing.

No electrical maximum or timing value is certified here for this Rochester lot. Confirm the original controlled data sheet before design release.

No LCDChip alternate is linked or qualified. AMD Am2908 has a different receiver threshold and is not automatically interchangeable. Compare original maker, parity behavior, bus termination, input threshold, open-collector sink rating, timing, temperature grade and full 20-pin footprint before proposing any substitute.

The local product records Rochester Electronics as supplier. Archived original AMD Am2907 documentation provides the family function, and distributor indexing associates 2907PC with AM2907. The unprefixed code does not itself establish the original manufacturer or revision of the supplied material. Request Rochester traceability, controlled device data and lot photographs.

Confirm traceable Rochester supply, original manufacturer marking, date and lot codes, lead condition and storage history. The public product price and inventory remain separate catalog fields; an indexed seller's stock/price match is not a dated authorized quotation. Reconcile exact current availability and quantity breaks before any price update or publication.

Keep this item in manual review. Obtain the lot-specific manufacturer data sheet and 20-pin package drawing, restore the local 20-DIP JPG, reconcile dated authorized stock and tier pricing, then recheck content, internal links and rendered page. No drop-in substitution or release approval is implied.