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HD74LSP Specifications: Gate Type: NAND ; Supply Voltage: 5V ; Logic Family: TTL ; Inputs: 8 Details, datasheet, quote on part number: HD74LSP . The semiconductor operations of Mitsubishi Electric and Hitachi were transferred to Renesas. Technology Corporation on April 1st HD74LSP from Renesas Electronics. Find the PDF Datasheet, Specifications and Distributor Information.

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Burst Start Position adjustment Connection: If the cassette is the selected input, then sound from the cassette recorder is routed to the sound output.

The mechanical assembly allows both potentiometers to xatasheet changed at the same time. The push-button switch merely provides a momentary ground contact for an input signal. Also, Table 2 lists some alternate values for these variables.

If the start position does not become 5. The 68B09E microprocessor is perhaps the most powerful 8-bit microprocessor available today. Scope settings are noted on the individual waveform diagrams. The order of the devices and how they respond to the different lines are called the memory map. Datasneet chip contains color subcarrier oscillator, voltage controlled 90 degrees phase shifter, two double-sideband suppressed carrier chroma modulators, RGB input matrix, and blanking level c 1 amp s.

Ensure that the power cord is properly routed to afford strain relief to the transformer connections. Cartridge Connector Datasehet 5. When using any or all of the information contained in these materials, including product data, diagrams, charts, programs, and algorithms, please be sure to. The first seven lines of data register A pins are programmed as inputs and are used to read dataheet keyboard rows.


HD74LS374P Datasheet

Color Computer 3 Address Decoding 36 A complete list gd74ls374p brief description of these signals is provided in Table 3. Mfr ‘s Part No. Figure shows the read and write timing cycles for DRAM.

It simply consists of a push-button switch for the fire button and the dual potentiometers connected by a mechanical assembly. Figure shows a schematic datasheer the Joystick Assembly. Insert them into corresponding holes of the RAM card Figure The final function of the SALT chip is to drive the cassette relay. Pin 2 of register A is the input for data from the cassette.

The microprocessor first selects the desired joystick input by means of the select pins which are connected to PIA IC5. It is used to detect the presence of a cartridge. It is, therefore, recommended that the technician be thoroughly familiar with the operation of the Color Computer 3, as well as the Theory of Operation.

HD74LS3 datasheet & applicatoin notes – Datasheet Archive

Figure shows the keyboard matrix. The zero-crossing detector internal to the SALT changes state each time the incoming signal passes through zero volt. It contains the Master Oscillator, the frequency of which is controlled by a The final function of the DAC chip is to provide the output signal for recording of cassette data. One leader byte – 55H 2.

The CPU gathers instructions and data from memory, interprets and executes the instructions, and stores the results of the data operations into memory.


When the incoming signal datssheet high, the transistor becomes saturated and connects its end of the cassette relay to ground, causing the relay to energize. Snap each stand-off into the corresponding hole on the computer PCB.

HD74LS374P PDF Datasheet浏览和下载

D3 and D4 form a full-wave, center- tapped rectifier with a negative output. The A side of IC5 is configured as inputs and connects to the row lines of the keyboard matrix. A second leader of bytes of 55H 5. The incoming signals are compared to a reference of 2. Figure shows a block diagram of the DAC chip.

The potentiometers are connected so that 5 volts are applied to one side of the variable resistor, and ground is connected to the other.

Isolating a problem down to the defective component will often involve the use of test equipment, and sometimes, by part substitution. Following is a list hd74ls374pp virtually all of the problems that might be identified on the Color Computer 3: The sound multiplexing section is very simple.

This is filtered by electrolytic capacitor C Unit Ruijing Building, No. PIA IC5 is used mainly for the keyboard. Hd74l374p sync byte – 3CH 3. He74ls374p Computer 3 Power Datashedt 45 This positive voltage is applied to the collector of pass transistor Ql and is used to power the SALT chip at pin