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TTL (Transistor
Transistor Logic) Circuits
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Last Updated:
June 02, 2021 01:44 PM |
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Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:
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Circuit Converts Between TTL & Shifted ECL - 08/15/96 EDN Design ideas: The bidirectional circuit in Figure 1 translates TTL to shifted ECL (SECL]. There are currently no IC 's available that perform this type of level translation. SECL levels correspond to either ECL or PECL referenced to a VCC of 2V and a VEE of -2.5V. You frequently encounter these levels in situations where the outputs of the ECL logic terminate Design by Sylvia Planer and Paul Sofianos, Motorola LICD, Chandler, AZ Convert Between TTL & Shifted ECL - 08/15/96 EDN Design ideas: The bidirectional circuit in Figure 1 translates TTL to shifted ECL (SECL]. There are currently no IC 's available that perform this type of level translation. SECL levels correspond to either ECL or PECL referenced to a VCC of 2V Design by Sylvia Planer and Paul Sofianos, Motorola LICD, Chandler, AZ |
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Measure humidity & temperature on one TTL line - 08/30/01 EDN Design ideas: By combining the responses of an Analog Devices (www. Analog.com] AD590 temperature sensor and a Humirel (www.humirel.com] HS1101 humidity sensor, you can generate a single TTL-level signal containing information from both sensors (Figure 1). This design uses a 74HC123 monostable multivibrator, IC 1, to form a free-running oscillator Design by Shyam Tiwari, Sensors Technology Pvt Ltd, Gwalior, India Micro Spy with TTL - This circuit is old (70's) but since the 74LS13 is from the regular 74xx series and easy to obtain, I decided to keep the circuit in place until components are no longer available. Not much to tell here. Performance is based on the 74LS13, a 'Dual 4-input Positive-Nand Schmitt Trigger'. This circuit was experimental and so has no real purpose other than tinkering. __ Designed by Tony van Roon VA3AVR |
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RS-232 to TTL Cable - A common feature found on many Microcontrollers is a serial port (often called a SCi, COM, or ASYNC port). I am going to use the term SCI as a short cut to mean the serial port on your Microcontroller. Quite often, the SCI on your Microcontroller will generate the appropriate LOGIC signals to communicate with another chip. They do not, however, generate the proper voltages required for connecting to RS-232 devices. This article is going to describe the differences between RS-232 and TTL, and how to build a converter so you can connect your Microcontroller to an RS-232 compatible device, such as the COM port on your PC. __ Designed by Kevin Ross Trigger a TTL from ECL levels - 11/08/01 EDN Design ideas: ECL circuits typically have relatively small logic spans of approximately 800 mV. Because of the small span, to drive TTL circuits from ECL levels normally entails the use of level converters, such as the MC10125, or comparators. Such circuits are relatively power-hungry and expensive. However, they are sometimes simply unnecessary Design by Lukasz Sliwczynski, University of Mining and Metallurgy, Krakow, Poland
TTL Pulse Reading Logic Probe - This circuit uses LEDs to display logic states for high, low, rising pulse, and falling pulse, it is generally useful for debugging logic circuitry. __ Designed by G. Forrest Cook
Versatile CMOS
/TTL Logic & Clock Probe - For fault diagnosis of any logic circuit, you need a probe that can test the logic level or existence of clock activity. The circuit shown here can be used to test...__ Electronics Projects for You |
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TTL (Transistor
Transistor Logic) Circuits |
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