Fairchild μL914

The Fairchild μL914  (P/N 156-0011-00) is an RTL dual NOR gate monolithic integrated circuit in an epoxy package similar to a TO-5.

Some instruments using part Fairchild μL914

Instrument	Manufacturer	Class	Description	Introduced
140	Tektronix	Audio/Video	NTSC signal generator	1969
141	Tektronix	Audio/Video	PAL signal generator	1969
142	Tektronix	Audio/Video	PAL TV Signal Generator	1970
144	Tektronix	Audio/Video	NTSC signal generator	1971
145	Tektronix	Audio/Video	PAL genlock test signal generator	1973
146	Tektronix	Audio/Video	NTSC signal generator	1971
230	Tektronix	Test Automation	Digital Unit	1967

Data

• Fairchild Micrologic(µL) Series condensed Data

Links

• Electronics World November 1965, p.40

The Fairchild μL914 dual two-input gate sells for 99¢.

• Using New Low-Cost Integrated Circuits. Donald E. Lancaster, Electronics World November 1966, p.50

The μL914 is called a dual two-input gate, but is far more useful than the name implies. It consists of two pairs of transistors sharing common collector loads. Outside of the supply and emitter connections, both halves of the circuit are completely separate. Considering one side, in the absence of any input, both transistors remain off, and the output voltage is equal to the supply voltage (connected to lead 8). If either (or both) inputs go positive, the driven transistor(s) saturates, and the output is connected to ground (connected to lead 4) via the low impedance of a saturated transistor. This IC is the workhorse of the line, for it readily forms all the logic circuits, all multivibrators, a host of linear amplifiers, level detectors, and some others that we will shortly examine.

• Uncovering the Silicon: μL914 @ Evil Mad Scientist – photos and details including a model of the die
  • Fairchild ul914 decapping by John McMaster @ YouTube
  • Ken Shirriff's μL914 replica
• μL914 @ radiomuseum.org

Note

Pictures

• 

  µL914 (Tek Part#156-0011-00)

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  141A Horizontal Timing board with µL9XX series logic ICs