Rochester Electronics, LLC 75150N

The 75150 family is used to translate logic inputs into bipolar serial-interface line levels. TI's SN75150 is a dual inverting driver with a shared strobe, intended for the interface between data terminal and data communication equipment. The Rochester exact-code listing identifies 75150N as an RS-232 interface driver, but a controlled original 75150N data sheet and traceable manufacturer marking are still required before design approval.

• Two driver channels in the documented 75150 functional family.
• Logic-to-bipolar line driving for legacy serial links.
• Shared strobe function in the TI SN75150 reference design.
• Through-hole eight-lead package class for maintenance of older boards, subject to lot verification.
• Related manufacturer documentation remains available for engineering comparison.

The TI SN75150 reference specifies TTL-family-compatible inputs, inverting outputs, a common strobe, external-capacitor slew-rate control and nominal plus/minus 12 V supplies. Under its stated test conditions it supports a 20-kbit/s data rate with a 2500-pF load and a maximum 2-microsecond transition through the +3 V to -3 V region. These are source-device reference characteristics, not independently verified specifications for Rochester's unprefixed 75150N lot.

The local catalog leaves the package field blank. Historical 75150N listings and the TI SN75150 P-package drawing indicate an eight-lead through-hole DIP class, but one aggregator anomalously labels Rochester 75150N as QFP/CQFP. The exact supplied package therefore needs a lot photo and controlled drawing. An 8-DIP entry exists in the local package register; its JPG is missing.

Assembly checks

• Verify actual body style, pin count and pin-one mark.
• Match the controlled mechanical drawing to the board footprint.
• Check date code, finish and solderability of legacy stock.

The TI SN75150 eight-pin top view assigns strobe S, input 1A, input 2A, ground, negative supply, outputs 2Y and 1Y, and positive supply to pins 1 through 8 respectively. Treat this as a comparison pinout only. Verify the actual Rochester 75150N manufacturer and package marking before connecting bipolar rails.

The comparison values cannot replace lot-specific electrical qualification. Obtain the original 75150N-controlled specification before using these limits in a design.

The internal database contains SN75150P from TI and DS75150N from National Semiconductor. Both are comparison candidates only; their exact supply, pinout, electrical ratings, temperature grade, and 8-DIP footprint must be checked against the original Rochester lot. Neither link indicates a qualified drop-in replacement.

The catalog names Rochester Electronics as the current supplier. Rochester-oriented part indexes call 75150N a dual line driver, but the original maker is not stated in the available exact-code listing. TI's official SN75150 Rev. C data sheet is the primary family-level technical comparison source. Request Rochester's original-manufacturer traceability, controlled data sheet and actual lot marking to resolve the code.

• Maintenance of legacy RS-232-compatible terminal interfaces.
• Older communications and instrumentation boards requiring bipolar line outputs.
• Logic-to-serial-level translation in already-qualified designs.
• Repair of existing dual-driver through-hole assemblies after part identification.

The local catalog lists 2,628 units at USD 12.78, minimum quantity 11, and no tier ladder. An external exact-code distributor index shows 2,628 units with tiers of USD 27.14 at one, USD 26.33 at 25, USD 25.51 at 100, USD 24.70 at 500 and USD 23.88 at 1,000. A separate reseller quotes materially different prices, so these are not a reconciled live Rochester quotation. No catalog price or inventory field has been changed. Obtain dated authorized stock, tier pricing, original manufacturer and lot documentation.

Keep this item in manual review and noindex. Confirm exact manufacturer, original controlled data sheet, lot package and finish; restore the local package JPG; reconcile direct stock and tier pricing; and recheck electrical and page-rendering requirements. Do not publish until all release gates pass.