The Microcircuit,digital, cataloged under National Stock Number 5962-01-237-2538, is classified within Federal Supply Class 5962 (Microcircuits, Electronic) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Keysight Technologies Inc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5962-01-237-2538 |
| Primary Part Number | 1820-1278 |
| Item Name | Microcircuit,digital |
| FSC / FSG | 5962 / 59 — Microcircuits, Electronic |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Input Circuit Pattern | 8 INPUT |
| Inclosure Material | PLASTIC |
| Terminal Surface Treatment | SOLDER |
| Design Function and Quantity | 1 COUNTER, UP/DOWN |
| Body Width | 0.250 INCHES NOMINAL IN |
| Body Height | 0.180 INCHES MAXIMUM IN |
| Features Provided | W/ENABLE AND SYNCHRONOUS AND REVERSIBLE UP/DOWN AND W/CLOCK AND PRESETTABLE |
| Inclosure Configuration | DUAL-IN-LINE |
| Body Length | 0.870 INCHES MAXIMUM IN |
| Storage Temp Range | -65.0 TO 150.0 CELSIUS DEGC |
| Output Logic Form | TRANSISTOR-TRANSISTOR LOGIC |
| Voltage Rating and Type Per Characteristic | 7.0 VOLTS MAXIMUM POWER SOURCE |
| Operating Temp Range | +0.0 TO 70.0 CELSIUS DEGC |
| Terminal Type and Quantity | 16 PRINTED CIRCUIT |
| Maximum Power Dissipation Rating | 90.0 MILLIWATTS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1820-1278 PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| DM74LS191N | 5/9 Secondary reference National Semiconductor Corporation |
| DM74LS191N | 5/1 Secondary reference Fairchild Semiconductor Corp |
| 1820-1278 | 3/9 Design control — primary reference Keysight Technologies, Inc. |
| 1820-1278 | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
| SN74LS191N | 5/1 Secondary reference Texas Instruments Incorporated |
NSN 5962-01-237-2538 is a Microcircuit,digital, manufactured by Keysight Technologies Inc, classified under FSC 5962, Microcircuits, Electronic. Status: active.
NSN 5962-01-237-2538 has 1 manufacturer part number on file: 1820-1278 (Keysight Technologies Inc).
1 possible match (shared part number, not a government interchangeability claim): 5962-01-248-8630. Verify interchangeability with system specifications before substitution.
Key specifications for 1820-1278: Input Circuit Pattern: 8 INPUT; Inclosure Material: PLASTIC; Terminal Surface Treatment: SOLDER; Design Function and Quantity: 1 COUNTER, UP/DOWN. 15 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.