The 2764 Datasheet: these two words might not mean much to the average person, but for retro computing enthusiasts, electronics hobbyists, and engineers working with legacy systems, they represent a vital key to understanding and utilizing a classic piece of memory technology. This document holds all the essential information needed to properly interface with and program the venerable 2764 EPROM.
Decoding the 2764 EPROM A Deep Dive
The 2764 datasheet is, at its core, a technical document outlining all the specifications, characteristics, and operational parameters of the 2764 EPROM (Erasable Programmable Read-Only Memory) chip. EPROMs like the 2764 were crucial components in early microcomputers, embedded systems, and arcade games. They provided a way to store program code and data that could be permanently stored, yet also erased and reprogrammed (albeit with some limitations). Understanding the datasheet is therefore fundamental to working with these legacy technologies. It contains everything from pin configurations and voltage requirements to timing diagrams and programming algorithms.
Specifically, the 2764 is a 64Kbit (8K x 8) EPROM. This means it can store 8192 bytes of data. The datasheet provides critical details on:
- Pinout: Identifying each pin’s function (e.g., address lines, data lines, chip enable, output enable).
- Voltage Requirements: Specifying the necessary power supply voltages and tolerances for reliable operation.
- Timing Characteristics: Detailing the timing requirements for reading data, including access times and enable delays.
- Programming Specifications: Explaining the procedure for writing data into the EPROM, including pulse widths, voltage levels, and verification steps.
Failure to adhere to these specifications can result in unreliable operation, data corruption, or even permanent damage to the chip. For example, incorrectly applying the programming voltage could render the 2764 useless.
The information within the 2764 datasheet allowed engineers to effectively incorporate it into circuit designs and develop programming routines. Consider a simple example involving reading data. The datasheet clarifies the timing relationships between address lines, chip enable, and output enable. A simplified table illustrates this:
| Signal | Description |
|---|---|
| Address Lines (A0-A12) | Select the memory location to read. |
| Chip Enable (CE) | Must be low to enable the chip. |
| Output Enable (OE) | Must be low to enable the output buffer. |
By carefully following the datasheet’s guidance, developers ensured proper timing and reliable data retrieval. The 2764 datasheet also includes information on erasing the EPROM via UV light exposure, specifying the required wavelength and duration.
Ready to dive deeper? Accessing and reviewing the 2764 datasheet itself is the next logical step to fully understand this chip and its capabilities.