Specs side by side
2 parts compared · 13 differing specs across 14 total parameters.
| Parameter | ||
|---|---|---|
| Supply voltage | - | Same rails; the grade buys accuracy, not headroom. |
| Memory & Peripherals | - | Where it matters: reference-derived negative rails, ADC bipolar front ends, and any repair where the original was a precision grade and drift was the complaint that started the repair. |
| Compatibility Level | - | 100% Drop-in (Zero Code Change) |
| Component Category | Fixed Linear Voltage Regulators (78xx / 79xx) | - |
| Core & Architecture | - | The tightened-tolerance build of the same regulators: 2 percent output tolerance against the looser commercial grades, in the same pin map and the same power ratings. |
| Firmware Notes | - | Grade substitution rule as everywhere: precision upward is free; dropping from AC into a circuit that calibrated against it shifts the rail by the tolerance difference. |
| Hardware Notes | - | TO-220 / insulated TO-220FP / D2PAK options across the family. |
| Lead Time Advantage | - | Shenzhen Spot Stock (24-48h Dispatch) |
| Market Reality | The 79xx series is the negative rail of every split supply that ever fed an op-amp, an audio stage or an instrument: -5V, -8V, -9V, -12V, -15V, -18V and -24V fixed 1.5A regulators in the same TO-220 body as the 78xx - and with a mirrored pinout that catches one swap per bench per year. The digits choose the voltage, the suffix grade (AC = 2 percent tolerance) chooses precision, and the prefixes (L, MC, KA, LM) are the familiar second-source names. The classic failure this page exists for: treating a 7905 as a misplaced 7805, when it differs in polarity, pin order AND tab potential - three separate ways to smoke a board at once. | - |
| Reference Part | - | L7905 / L7912 |
| Role In Circuit | Original Reference Part | - |
| Sourcing Advantage | - | Stocked; quote the grade the schematic asked for. |
| Sourcing Status | Active Shenzhen Spot Sourcing (24–48h) | - |
| Case | TO-220 / TO-220FP / D2PAK | TO-220 / TO-220FP / D2PAK |
Parts
- L7905 / L7912 · stmicroelectronics
- L79xxAC · stmicroelectronics