Fairchild μL900

The Fairchild μL900  (P/N 156-0010-00) is an RTL buffer-inverter monolithic integrated circuit in an epoxy package similar to a TO-5.

Some instruments using part Fairchild μL900

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

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

The μL900 (about $1.60 each) is a buffer element designed to provide inversion and a high drive capability. This circuit finds use whenever a large number of inputs (up to a load factor of "80" units) is to be driven from a single circuit or when a low-impedance output is required for external circuitry. This three-transistor, five-resistor circuit operates as a switch. Ground the input and the top transistor saturates, connecting the output load to +3.6 volts which is tied to lead 8. Connect the input to a positive voltage between 1 and 3.6 volts and the top transistor goes off and the bottom two saturate, connecting the load to ground (tied to lead 4) through a low impedance.

Note