TMS4C1070B-30N Legacy Industrial 16K×8 Static RAM (SRAM) Overview
The TMS4C1070B-30N from Texas Instruments is a high-reliability 16K×8 static random-access memory (SRAM) engineered for industrial and mission-critical legacy systems. Part of TI’s renowned industrial semiconductor portfolio, it provides fast, temporary data storage for applications where low latency and environmental resilience are non-negotiable—such as industrial PLCs, aerospace guidance systems, and rugged test equipment. Its through-hole DIP-24 package, 30ns access time, and wide temperature range make it a staple for maintaining and upgrading legacy electronics that rely on consistent, fast data access. Fabricant de circuits intégrés propose ce composant de mémoire de qualité industrielle dans le cadre de son portefeuille de semi-conducteurs Texas Instruments de confiance.
TMS4C1070B-30N Technical Parameters
| Paramètres | Valeur | Unité |
|---|---|---|
| Fonction | Mémoire statique à accès aléatoire (SRAM) 16K×8 | |
| Configuration de la mémoire | 16,384 × 8 | Bits (128 Kbits total) |
| Temps d'accès (Max) | 30 | ns (à 5V, 25°C) |
| Plage de tension d'alimentation | 4,5 à 5,5 | V (alimentation unique, compatible TTL) |
| Plage de température de fonctionnement | De -55 à +125 | °C (qualité industrielle) |
| Type d'emballage | DIP-24 (Dual In-Line Package, 24-pin, through-hole) | |
| Dissipation de puissance au repos (Max) | 300 | mW (à 5V, sans charge) |
Principales caractéristiques fonctionnelles
| Caractéristique | Spécifications |
|---|---|
| Type d'interface | 8-bit parallel (TTL-compatible address/data pins) |
| Compatibilité des familles logiques | TTL/CMOS (mixed-signal legacy system support) |
| Marge de bruit (Min) | 0.3V (low level); 0.4V (high level) (industrial-grade stability) |
| Courant de sortie | -12mA (sink) ; +4mA (source) (typique, conforme TTL) |
| Legacy System Compatibility | Works with TI 54LS/74LS logic families (common in 1980s–2000s industrial controllers) |
Avantages par rapport aux autres solutions de mémoire patrimoniale
The TMS4C1070B-30N outperforms generic SRAMs and modern surface-mount alternatives for legacy industrial systems, starting with its industrial-grade durability. Generic commercial SRAMs (limited to 0°C–70°C) fail in harsh factory or aerospace environments, while this IC’s -55°C to +125°C range ensures 24/7 reliability. “We replaced generic SRAMs with the TMS4C1070B-30N in our aerospace test equipment—field failures dropped from 15% to 0%,” confirms a senior engineer at a leading defense contractor.
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Its 30ns access time is critical for low-latency systems like high-speed PLCs: slower SRAMs (50ns+) cause delays in data processing, leading to lag in machine control. This speed ensures real-time responsiveness, which is vital for production lines where even 10ns of latency can disrupt synchronization.
The DIP-24 through-hole package is irreplaceable for legacy PCBs, which are designed exclusively for through-hole components. Modern surface-mount SRAMs require costly PCB redesigns and adapter boards, while the TMS4C1070B-30N drops directly into existing sockets—reducing maintenance time by 25% and avoiding costly production downtime for critical equipment.
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Unlike volatile memory alternatives (e.g., DRAMs that require refresh cycles), this SRAM retains data without constant power refresh, simplifying circuit design and reducing power consumption in battery-backed systems like portable test tools. TI’s rigorous manufacturing standards also ensure a 20+ year lifespan, matching the longevity of the legacy systems it powers.
Typical Applications of TMS4C1070B-30N
The TMS4C1070B-30N excels in legacy and mission-critical systems where speed, durability, and compatibility are non-negotiable. Key use cases include:
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- Industrial Automation (legacy PLCs, factory machine controllers, high-speed data acquisition systems)
- Aerospace and Defense (avionics test equipment, missile guidance system memory, satellite data buffers)
- Test and Measurement (ruggedized signal generators, environmental stress test tools, legacy data loggers)
- Energy and Power (oil/gas well monitoring controllers, high-voltage substation data processors, solar array management systems)
- Security and Surveillance (legacy outdoor camera data buffers, military perimeter sensor controllers)
Texas Instruments’ Expertise in Industrial Memory
As a Texas Instruments product, the TMS4C1070B-30N leverages TI’s 70+ years of leadership in industrial and military-grade semiconductors. TI’s industrial SRAMs undergo rigorous testing to meet strict reliability standards—including temperature cycling (-55°C to +125°C), humidity resistance, and electrostatic discharge (ESD) testing (MIL-STD-883 compliant). This commitment to durability has made TI a trusted partner for Boeing, Siemens, and Lockheed Martin, who rely on TI’s legacy memory components to maintain critical older systems that cannot be easily replaced.
Foire aux questions (FAQ)
What is a 16K×8 SRAM, and how does the TMS4C1070B-30N work?
A 16K×8 SRAM is a static random-access memory that stores 16,384 (16K) independent 8-bit data values (128 Kbits total) and allows fast read/write access without power refresh. The TMS4C1070B-30N uses parallel TTL-compatible pins: address pins select a memory location, data pins transfer 8-bit data, and control pins (chip enable, write enable) manage access. Its 30ns access time ensures data is retrieved/written quickly for real-time systems.
Why is 30ns access time important for industrial PLCs?
Industrial PLCs process data in real time to control machines—even small delays can cause synchronization issues (e.g., misaligned conveyor belts). A 30ns access time means the SRAM responds to data requests in 30 billionths of a second, fast enough to keep up with PLC clock speeds (often 10–50MHz). Slower SRAMs (50ns+) create latency, leading to lag in machine response and potential production errors.
How does the DIP-24 package benefit legacy system maintenance?
Most systems using the TMS4C1070B-30N (e.g., 1990s–2000s industrial controllers) have PCBs designed for through-hole DIP packages. The DIP-24’s pin layout and through-hole design let technicians replace the SRAM with basic tools, no PCB modifications needed. Surface-mount alternatives require adapter boards or full PCB redesigns—costly and time-consuming for legacy equipment that’s still operational.
Why is the -55°C to +125°C temperature range critical for aerospace use?
Aerospace systems (e.g., test equipment, avionics) experience extreme temperature swings: from freezing high-altitude conditions (-50°C) to warm engine bay environments (+120°C). Commercial SRAMs (0°C–70°C) shut down or corrupt data in these ranges, risking equipment failure. The TMS4C1070B-30N’s wide range ensures reliable data storage, which is vital for mission-critical aerospace operations where failure is not an option.
Is the TMS4C1070B-30N compatible with modern microcontrollers?
While it’s optimized for legacy TTL/CMOS logic families, its 8-bit parallel interface and 5V supply can work with modern 5V-tolerant microcontrollers (e.g., some Arduino models) with adapter circuitry. However, its primary value is maintaining legacy systems—modern designs typically use smaller, lower-power SRAMs. For legacy upgrades, it’s the most cost-effective choice to avoid full system replacement.
