- LM340-12K
- National Semiconductor
- Misc. Data Book Scans 1975/76
- LM340-12MDC
- National Semiconductor
- Series 3-Terminal Positive Regulators
- LM340-12MWC
- National Semiconductor
- Series 3-Terminal Positive Regulators
- LM340-12DA
- Signetics / Mullard
- Analogue IC Data Manual 1977
- LM340-12U
- Signetics / Mullard
- Analogue IC Data Manual 1977
- LM340-12KC
- Texas Instruments
- 3-Terminal Negative Voltage Regulators
- LM340-12
- Texas Instruments
- 3-Terminal Negative Voltage Regulators
- LM340-12KC
- Texas Instruments
- 3-Terminal Negative Voltage Regulators
- LM340-12MWC
- Texas Instruments High-performance Analog
- 12 V FIXED POSITIVE REGULATOR, UUC