MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18

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MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18

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191839143175

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The SM10LZ47 transistor is a high-performance component designed for a wide range of electronic applications, particularly those requiring efficient power switching and amplification. Encased in a TO-220F package, this transistor offers excellent thermal isolation, enhancing its reliability and performance in demanding environments. The TO-220F package ensures that the transistor is electrically isolated from the heatsink, reducing the risk of short circuits and improving overall safety. This feature is particularly important in applications where high voltages are present. The SM10LZ47 is engineered to deliver exceptional switching speeds and low on-resistance, minimizing power loss and maximizing efficiency. Its robust construction and high breakdown voltage make it a reliable choice for power supplies, motor controllers, and audio amplifiers.

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Product Name	MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18
SKU	191839143175
Price	£8.00
MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 Color	As per image
Category	Integrated Circuits
Brand	Nikko Electronics ltd
Product Code	191839143175
Availability	Yes

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FAQ

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Is the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 fully compatible with the industry-standard 2114 SRAM pinout?
Yes, the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 is designed to be a direct, drop-in replacement for the industry-standard 2114 static RAM series. This 1024-word by 4-bit memory chip adheres to the standard DIP-18 footprint, making it ideal for maintaining or repairing vintage computing hardware, arcade game boards, and early microprocessor systems. The MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 features a common I/O structure, where the four data input and output lines share the same pins, simplifying PCB routing. When replacing components in legacy systems like the Commodore PET, Atari consoles, or classic arcade PCBs, the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 provides the exact electrical characteristics required. It operates on a single +5V power supply and is fully TTL compatible on all inputs and outputs. Because it is a static RAM, the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 does not require external refresh circuitry or clock signals to retain data, which was a significant advantage in the design of 8-bit microcomputer systems.
What does the '30' suffix indicate regarding the access time of the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18?
The '30' suffix in the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 part number indicates a maximum address access time of 300 nanoseconds (ns). In the context of vintage 8-bit microprocessors like the Zilog Z80, MOS 6502, or Motorola 6800, the 300ns speed of the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 is typically sufficient for systems running at clock speeds up to 2MHz or 3MHz without requiring wait states. Understanding the timing margin is critical for engineers performing restorations; while a 300ns chip like the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 can usually replace slower versions (such as 450ns parts), it should only be used in systems where the memory cycle timing permits a 300ns window. The MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 ensures stable data valid times during read cycles and provides reliable write pulse widths. When designing or repairing, always verify that the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 meets the specific setup and hold time requirements of your CPU's bus architecture to prevent intermittent data corruption.
How does the 'L' designation in the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 affect power consumption?
The 'L' in the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 signifies that this is the 'Low Power' version of the 2114 SRAM series. This is a critical feature for high-density boards or battery-backed applications. The MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 draws significantly less current during both active and standby modes compared to the standard MCM2114. Specifically, the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 reduces the thermal load on the system, which is vital for vintage electronics where heat can degrade components over time. By using the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18, you can lower the overall power draw of the memory bank, which often consists of multiple chips to form a full kilobyte or more of memory. This lower current requirement also places less stress on the +5V voltage regulator of the host system. For technicians, selecting the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 over a standard power variant is a proactive step toward improving the long-term reliability and cooling efficiency of the device being serviced.
What are the specific logic level requirements for the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18?
The MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 is engineered with full TTL (Transistor-Transistor Logic) compatibility. This means that for the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18, a logic 'high' input is recognized at a minimum of 2.0V, while a logic 'low' is recognized at a maximum of 0.8V. On the output side, the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 provides a minimum VOH of 2.4V and a maximum VOL of 0.4V, ensuring it can drive standard TTL loads without the need for additional buffer circuitry. This makes the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 exceptionally easy to integrate into 5V digital logic circuits. Furthermore, the tri-state output capability of the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 allows for efficient bus-organized system designs. When the Chip Select (CS) pin is high, the data outputs of the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 enter a high-impedance state, preventing bus contention and allowing other memory devices or peripherals to communicate with the CPU over the shared data bus.
Can the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 be used in battery-backed memory applications?
While the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 is a volatile NMOS static RAM, its 'Low Power' (L) characteristic makes it a candidate for certain battery-backup configurations, provided the standby voltage remains within the functional range. In many vintage systems, the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 was used to store configuration data or high scores in arcade games using a small battery circuit. However, it is important to note that the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 requires a stable voltage to maintain data integrity. The low standby current of the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 is much more battery-friendly than standard 2114 variants, though modern CMOS SRAMs are generally preferred for new battery-backed designs. If you are replacing a chip in an existing battery-backed circuit, the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 is the ideal choice to ensure the power consumption stays within the original design parameters, preventing premature battery drain and ensuring that the stored data is preserved during power-off cycles.
What are the thermal and mechanical advantages of the DIP-18 package used for the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18?
The MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 utilizes the Dual In-line Package (DIP) with 18 pins, which was the standard for high-reliability memory components during the peak of 8-bit computing. The DIP-18 format of the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 offers excellent mechanical durability and ease of handling for through-hole soldering or socketing. From a thermal perspective, the plastic DIP package of the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 provides adequate heat dissipation for its low-power NMOS architecture. Because the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 is a relatively small 18-pin device, it allows for high-density packing on a PCB while still being large enough for easy manual replacement or troubleshooting with logic probes. The physical layout of the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 pins is optimized to separate address lines from data lines, which helped designers minimize crosstalk and signal interference on early two-layer printed circuit boards.
Why is the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 preferred for arcade and vintage computer restoration over generic equivalents?
Restoration experts prefer the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 because it is a genuine Motorola-branded part that adheres to strict historical manufacturing tolerances. In many classic arcade games (like Pac-Man or Galaga) and home computers (like the Commodore 64's color RAM or the PET's main memory), the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 provides the exact timing and electrical 'signature' the original designers intended. Using the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 ensures that you don't encounter the 'glitching' or 'snow' on the screen that can sometimes occur when using modern, ultra-fast CMOS replacements that may have faster rise/fall times than the original logic can handle. The MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 offers a perfect balance of 300ns speed and low power consumption, making it a reliable and authentic choice for bringing legacy hardware back to life. Furthermore, the MCM21L14P30 1K x 4 Static RAM (SRAM) IC - DIP-18 is known for its robust construction, which can withstand the thermal cycling common in older, poorly ventilated enclosures.