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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When the incoming signal is low, the transistor is cut off. A list of all the printer variables is given in Table 1. Removal of Main PCB 26 The transformer should only be replaced with genuine Tandy replacement parts.

The 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.


One trailer byte – 55H The End of File block is a standard block with a length of 0. MMU Block Diagram 37 The user can move the “window 1 the displayed screen by means of the horizontal offset bits.

From the computer, the signal is connected to a balun in the switch box which matches the modulator’s ohm output impedance to a TV f s ohm antenna input impedance. Pin 10 is the RSC signal input pin. This level follows the input level up to 3. It is also designed to output two different video signals – composite video and analog RGB.


In addition, the CPU is capable of performing a limited set of mathematical and logical operations on the data. The following resolutions are supported: These shields must be in place to provide proper RFI shielding. These are the RGB values. This reference signal hd74ls734p then divided by 4 or 2 again to provide the 0.

The is connected ider part of f 4 is used to to This is, quite simply, a buffered output hd74ls3744p the DAC which is attenuated to produce approximately 1 volt p-p into a 2-kohm load. Burst Start Position adjustment Connection: These registers are divided into 2 sets, 8 registers per set. For the PAL version, ignore the table hd74ks374p to composite. These clock signals must be present for the CPU to function.

Eight bytes for the program name 2. This output is coupled through a ohm resistor, R15 to the output connector. The address hd74ls374l must toggle through all row address possibilities in 4 milli- seconds or less. It simply consists of a push-button switch for the fire button and the dual potentiometers connected by a mechanical assembly. Note that there are sixteen address lines AO through A Sel A and Sel B. Scope settings are noted on the individual waveform diagrams.

Descript ion RS Part No. Whenever a cartridge is inserted into the computer, this input will datashset BASIC and jump to the program in the cartridge.

Standard troubleshooting techniques include these steps: The 68B09E microprocessor is perhaps the most powerful 8-bit microprocessor available today.

HD74LSP (RENESAS) PDF技术资料下载 HD74LSP 供应信息 IC Datasheet 数据表 (8/8 页)

Due to the nature of the ROMs and in order to prevent data bus contention, the ROMs are enabled only during the E portion of a read cycle. The most common usage of the cartridge connector is with the ROM cartridge. The collector exits the SALT chip at pin 9 and is connected to one end of the cassette relay.


The output of the DAC is then buffered and attenuated to provide approximately 3. ACVC can expand memory space up to K bytes. Most significant address byte 2.

HD74LS3 datasheet & applicatoin notes – Datasheet Archive

Pin 2 of register A is the input for data from hd74ls37p4 cassette. It is designed to provide the same reliable operation as its predecessor, but it incorporates the latest in electronic technology.

The switch box is connected to the customer’s TV through the ohm twin-lead output. Following is a list of virtually all of the problems that might be identified on the Color Computer 3: Doing so can save hours of troubleshooting time only to find out that a cable was bad, or that it was some other relatively minor problem.

Therefore, it is up to the microprocessor to produce the necessary FSK signals through the DAC and the proper software. The current for the computer is drawn from the emitter of Ql through resistor R