U2164D 4x16K RAM IC DIP 16-Pin
The U2164D is a 64K-bit dynamic RAM (DRAM) chip organized as four 16K-bit banks, each 1-bit wide, packaged in a 16-pin Dual In-line Package (DIP). Manufactured in the German Democratic Republic (GDR) during the 1980s, it was produced by VEB Kombinat Mikroelektronik Erfurt (KME). This chip was commonly used in vintage computing systems and arcade machines.
As a DRAM, the U2164D requires periodic refreshing to maintain data integrity. It operates with a 150ns access time and supports a refresh cycle of 128 cycles every 2 microseconds. The chip’s architecture allows for efficient data storage and retrieval, making it suitable for applications where space and power efficiency are crucial.
While the U2164D is no longer in production, it remains a valuable component for enthusiasts and restorers of vintage electronics. Its functionality is comparable to other 4164-type DRAM chips, such as the TMS4164, MB8264, and MK4116, which can serve as direct replacements in compatible systems.
Features:
- High Integration: Combines four 16K-bit banks in a single 16-pin package.
- Fast Access Time: 150ns access time for quick data retrieval.
- Efficient Refreshing: Supports 128 refresh cycles every 2 microseconds.
- Low Power Consumption: Designed for energy-efficient operation.
- Compact Form Factor: 16-pin DIP package suitable for space-constrained applications.
- Legacy Compatibility: Compatible with other 4164-type DRAM chips like TMS4164 and MB8264.
Specifications:
| Specification | Details |
|---|---|
| Memory Organization: | 4 × 16K × 1-bit |
| Access Time: | 150ns |
| Refresh Cycle: | 128 cycles every 2μs |
| Operating Voltage: | 5V ±10% |
| Package Type: | 16-pin DIP |
| Manufacturer: | VEB Combinate Microelectronic Erfurt (KME) |
| Production Era: | 1980s |
| Compatibility: | TMS4164, MB8264, MK4116 |
Applications:
- Vintage Computing Systems.
- Arcade Machines.
- Retro Gaming Consoles.
- Early Personal Computers.
- Embedded Systems in the 1980s.
Package Contents:
- 1x U2164D 4x16K RAM IC DIP 16-Pin


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