Product Overview
Radio Shack 276-2449 Hex Inverter Logic IC - Motorola MC14049U DIP-16
Condition
Condition is new old stock (NOS), unused. Markings legible: Motorola emblem MC14049U BCP ZK/R8634. Sold each.
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Product Overview
Archer Cat. No. 276-2449 provides six independent inverting buffer channels in a standard 16-pin dual in-line package. Manufactured by Motorola under part number MC14049UBCP and distributed under Radio Shack's Archer brand, this unbuffered CMOS device provides logic-level conversion from high to low voltages and can drive up to two standard TTL loads directly.
Key Features
- Six independent inverting buffer circuits in a DIP-16 through-hole package
- Unbuffered CMOS logic family architecture (4000 series / MC14049UB)
- Supply voltage operating range from 3V to 18V DC
- High-to-low logic-level conversion with input voltage capability exceeding supply voltage
- Drive capability of up to 2 TTL loads at 5V DC
- Standard pinout with pin 1 for VDD, pin 8 for VSS, and unconnected pins 13 and 16
Applications
- Interfacing higher-voltage CMOS logic outputs to 5V TTL inputs without discrete level-shifting transistors
- Building multi-stage square-wave audio oscillators, clock sources, and pulse generators on breadboards
- Driving low-power indicator LEDs and switching circuits directly from CMOS logic rails
- Repairing and restoring vintage Radio Shack electronics projects, educational kits, and legacy digital hardware
Frequently Asked Questions
Can input voltage exceed the supply voltage on this buffer?
Yes. The 4049 unbuffered hex inverter is designed with an input structure that allows input voltages up to 15V or 18V even when running on a lower VDD supply, such as 5V, allowing direct high-to-low logic conversion.
What is the difference between an unbuffered 4049U and a standard 4049B?
The unbuffered (U or UB) design uses a single inverting stage per channel rather than three cascaded stages. This reduces propagation delay and makes the chip suitable for linear oscillators and amplifiers, though it exhibits lower overall voltage gain than buffered B-suffix logic.
Is the internal chip marked differently than the retail package?
Yes. The package carries Archer catalog number 276-2449, while the integrated circuit inside carries Motorola manufacturer markings MC14049UBCP.
Vintage unbuffered CMOS has an analog immediacy that modern buffered logic smoothed away. Plug it into your socket and let six honest inverters do their work.
