Texas Instruments SN74ALS04BN HP 1820-2634 Hex Inverter ALS TTL IC DIP-14 Vintage – 1 Piece
$5.95
Genuine vintage Texas Instruments SN74ALS04BN Advanced Low-Power Schottky TTL logic IC carrying Hewlett-Packard part number 1820-2634. THIS LISTING AND PRICE ARE FOR ONE (1) IC.
The SN74ALS04BN contains six independent logic inverters in a standard 14-pin through-hole DIP package. It operates from a 4.5V to 5.5V supply and belongs to the 74ALS family of bipolar TTL logic. The device was used for logic inversion, signal conditioning, timing and control functions in computers, instrumentation, industrial electronics, communications hardware, digital control boards, and professional test equipment. Texas Instruments currently lists the exact SN74ALS04BN PDIP-14 version as ACTIVE, so this exact device is NOT obsolete even though this particular example is genuine vintage production stock. ([Texas Instruments][1])
This IC is especially interesting because it carries the Hewlett-Packard OEM part number 1820-2634 directly on the package. HP cross-reference documentation identifies HP 1820-2634 as the Texas Instruments SN74ALS04BN ALSTTL hex-inverter IC. ([Bitsavers][2])
HISTORICAL BACKGROUND:
The 74ALS logic family was developed as an improved low-power Schottky TTL generation, providing reduced power consumption while retaining the speed and robust switching characteristics needed in professional digital systems. Devices such as the SN74ALS04 became common throughout 1980s and 1990s computers, laboratory instruments, industrial controllers, communications equipment, and other digital assemblies.
The photographed device is marked MALAYSIA 9026CS, SN74ALS04BN, and HP 1820-2634. The 9026 marking is consistent with a 1990-era manufacturing code, but RF Boneyard does not guarantee an exact production week interpretation unless independently documented.
The HP 1820-2634 identity has particularly useful restoration history. Hewlett-Packard service documentation for the HP 4195A Network/Spectrum Analyzer specifically identifies 1820-2634 / SN74ALS04BN as a TTL ALS hex inverter used in the instrument. This makes an original HP-marked example useful to restorers servicing period Hewlett-Packard laboratory and measurement equipment where matching the original manufacturer and HP service-part identity is desirable.
Origin Tracker
Obsolete Stock
Legacy or discontinued stock no longer in normal production flow. Future supply may be limited.
Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.
Compatible Radios / Boards
Texas Instruments SN74ALS04BN applications requiring a six-channel TTL inverter in a 14-pin PDIP package. Directly cross-referenced to Hewlett-Packard part number 1820-2634. Documented in Hewlett-Packard service literature including the HP 4195A Network/Spectrum Analyzer. May also be suitable for other equipment designed around the SN74ALS04B family where voltage, timing, logic thresholds, loading, package and pinout requirements match. Buyer must verify service-manual requirements and circuit compatibility before installation.
RF Boneyard Bench Notes
Visual inspection completed. Texas Instruments, SN74ALS04BN, HP 1820-2634 and Malaysia 9026CS markings are clear. Package and all 14 leads are present. No obvious solder residue is visible in the supplied photograph. Electrical functionality has not been bench tested; sold as untested vintage old-stock semiconductor.
Ask the bench before you buy.
Post a question about this part
Login or create an account to ask a product question. This helps keep spam out of the RF Boneyard bench.
Login to AskAnswered Questions
No answered questions yet. Be the first to ask the bench.