Overview
The Intel MD2764A-35/B is a high-performance dynamic random-access memory (DRAM) chip, designed to offer fast data access and efficient performance in a wide range of applications, including embedded systems, computing devices, and memory-intensive applications. As part of Intel's product family, this memory device provides a reliable and cost-effective solution for systems requiring high-speed access to memory with low latency.

Key Features

* Memory Type: The MD2764A-35/B is a 64K-bit DRAM chip, utilizing dynamic memory technology for fast read/write operations.
* Access Time: The device offers a 35ns access time, allowing for quick data retrieval, making it ideal for high-speed memory applications.
* Low Power Consumption: The MD2764A-35/B is optimized for low power consumption, helping to minimize energy usage in battery-operated devices and ensuring efficient operation.
* Asynchronous Operation: It operates asynchronously, meaning it does not require a clock signal for reading and writing data, allowing for simpler integration into systems with various clock frequencies.
* Single Power Supply: The chip operates with a single power supply, simplifying the power management in systems that use the MD2764A-35/B for memory storage.

Electrical Specifications

* Operating Voltage: The Intel MD2764A-35/B operates at a typical supply voltage of 5V, ensuring compatibility with standard logic levels used in most embedded and computing systems.
* Input Voltage: The input voltage range for the device typically ranges from 0V to Vcc, where Vcc is the positive supply voltage.
* Power Consumption: The typical active current consumption of the MD2764A-35/B is around 20mA under normal operational conditions. During standby mode, the current draw is significantly reduced, improving the overall power efficiency.
* Data Retention Voltage: The device requires a minimum voltage for data retention, typically around 3V, ensuring data integrity during low-power or idle periods.
* Data Output Drive: The memory device is capable of driving outputs for reliable data transmission, ensuring strong signal integrity during memory access operations.

Functional Specifications

* Memory Organization: The MD2764A-35/B is organized as 8 bits by 8K words, providing a total memory capacity of 64K bits. This allows for substantial storage in systems that do not require excessively large memory capacities.
* Refresh Operation: Being a dynamic RAM (DRAM), the MD2764A-35/B requires periodic refreshing to maintain data integrity. The device supports a refresh cycle time of 128ms, which is typical for devices in this class.
* Refresh Type: The device uses an automatic refresh mechanism to ensure continuous data integrity, without requiring additional control signals from the host system.
* Data Access: Data access is provided through separate read and write operations. During a read, data is transmitted from the memory array to the output pins, while during a write, data is written to the memory array from the input pins.

Control Signals

* Read/Write Control: The MD2764A-35/B uses an asynchronous read/write control scheme, where the logic level on the R/W pin determines whether data will be read from or written to the memory.
* Chip Enable (CE): The chip enable (CE) pin is used to enable or disable the chip. When CE is active, the memory chip is enabled and can perform memory operations; when inactive, the chip is in a standby state.
* Output Enable (OE): The output enable (OE) pin controls whether the data outputs are enabled or tri-stated. When OE is active, the data outputs are enabled for reading the stored data.
* Address Inputs: The MD2764A-35/B uses address pins to select specific locations within the memory array. The 8-bit wide address bus allows addressing up to 8K words of memory.

Timing Characteristics

* Access Time: The MD2764A-35/B features an access time of 35ns, ensuring rapid read and write cycles, which is crucial for applications requiring quick memory retrieval.
* Cycle Time: The cycle time for the device is typically 70ns, meaning that memory operations can occur every 70ns, ensuring high-speed performance in dynamic applications.
* Write Pulse Width: The minimum write pulse width for the device is typically around 20ns, ensuring proper data writing during memory operations.
* OE Access Time: The device features an output enable access time of around 20ns, which ensures that data is readily available from the outputs when the output enable pin is active.

Package Type and Pin Configuration

* Package Type: The MD2764A-35/B is typically available in a 16-pin Dual In-line Package (DIP) configuration, making it easy to integrate into various system designs. The DIP package offers convenient mounting and is widely compatible with various board designs.
* Pin Configuration: The 16 pins of the MD2764A-35/B are arranged as follows:

* Pins 1-8: Address and data input/output pins (A0 to A7, D0 to D7)
* Pins 9-10: Control pins (CE, OE)
* Pins 11-16: Power supply and ground pins (Vcc, GND, R/W)

Applications

* Embedded Systems: The MD2764A-35/B is ideal for use in embedded systems that require a small, efficient memory storage solution, such as microcontroller-based systems, sensor platforms, and IoT devices.
* Consumer Electronics: It is also used in consumer electronics that require low to medium memory capacity, such as handheld gaming devices, early-generation PDAs, and set-top boxes.
* Industrial Devices: The device is suitable for various industrial control applications where compact memory storage is needed for embedded systems, such as motor controllers, PLCs, and instrumentation.
* Testing and Prototyping: The device is often used in testing and prototyping applications where a reliable DRAM solution is needed without requiring the complexity of larger, high-speed memory solutions.

Summary
The Intel MD2764A-35/B is a reliable and efficient DRAM chip offering a 64K-bit memory capacity, 35ns access time, and low power consumption. It is designed for use in applications where low-cost, low-power memory solutions are required. With its easy-to-use control signals, low voltage operation, and fast data access, it is well-suited for embedded systems, industrial applications, and consumer electronics. Its compact 16-pin DIP package allows for flexible integration into a wide range of designs.