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Renesas 5962-8855204UA
- Part No.:
- 5962-8855204UA
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-CDIP (0.300", 7.62mm)
- Datasheet:
-
5962-8855204UA.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,186
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Product details
Overview
5962-8855204UA from Renesas Electronics is a military-grade 256K (32K × 8-bit) CMOS static RAM with 25ns access time, 5V ±10% supply, and MIL-STD-883 Class B compliance. It operates across –55°C to +125°C, supports TTL-compatible I/O, and features low-power standby (20mA) and battery backup data retention at 2V. It serves as main memory or buffer in avionics mission computers requiring high-reliability non-volatile storage during power interruption.
For engineers reviewing the 5962-8855204UA datasheet, 5962-8855204UA pinout, 5962-8855204UA application, or 5962-8855204UA equivalent, this page delivers verified timing parameters, military temperature validation, ceramic DIP package mapping, and direct alternative part comparisons for legacy system sustainment and obsolescence mitigation.
Technical Context
The 5962-8855204UA implements a full CMOS static memory array with asynchronous parallel interface, using address decoding logic that enables single-cycle read/write access without clocks or refresh. Its control architecture relies on three independent active-low signals - CS, WE, and OE - enabling flexible bus arbitration and output tri-state management.
It supports two distinct power modes: dynamic operation (ICC = 135mA max at fMAX) and TTL-level standby (ISB = 20mA max), plus full CMOS-level standby (ISB1 = 20mA max). The device guarantees data retention down to 2V VCC with ≤500μA current draw across its full military temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), byte-wide parallel interface |
| Access Time (tAA) | 25ns max - determines minimum CPU wait state insertion for 80C86/80C88-based systems |
| Supply Voltage | 5V ±10% - compatible with standard military 5V power rails; no external regulation required |
| Operating Temperature | –55°C to +125°C - validated per MIL-STD-883 Class B for airborne/spaceborne deployment |
| Package Type | 28-pin 600-mil ceramic DIP (CD28) - hermetically sealed, leaded, board-mountable with proven thermal cycling reliability |
| Input Compatibility | TTL-compatible inputs (VIH = 2.2V min, VIL = 0.8V max) - interfaces directly with 74LS/ACT logic without level shifters |
| Data Retention | 2V minimum VCC - maintains stored data during brownout or battery fallback in flight control modules |
Pinout & Package
5962-8855204UA is housed in a 28-pin 600-mil ceramic dual in-line package (CD28), featuring hermetic sealing and gold-plated leads suitable for high-reliability military PCB assembly. Pin numbering follows standard DIP top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting 0–32767 row/column selection; latched internally on CS/WE transitions |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit TTL-compatible data path; high-impedance when CS HIGH or OE HIGH during reads/writes |
| CS | Chip Select | Active-low enable; asserts internal circuitry and disables outputs when HIGH (standby mode entry) |
| WE | Write Enable | Active-low write strobe; controls data latch direction and memory cell programming timing |
| OE | Output Enable | Active-low output gate; isolates I/O pins from bus when HIGH to prevent contention |
| VCC | Power Supply | +5V ±10% primary supply; powers core logic and I/O drivers; decoupling required per MIL-HDBK-454 |
| GND | Ground Reference | Signal and power return; requires low-inductance connection to chassis ground per MIL-STD-461 |
Key Features
| Feature | Design Value |
|---|---|
| MIL-STD-883 Class B compliance | Fully tested per Method 5005 (steady-state life), 5007 (thermal shock), and 5013 (hermeticity) - certified for flight-critical hardware |
| 25ns military-speed access | Guaranteed tAA ≤25ns at –55°C to +125°C - enables real-time data buffering in radar signal processors |
| Battery backup data retention | Operates down to 2V VCC with ≤500μA ICCDR - sustains configuration memory during main power loss in UAV guidance units |
| TTL-compatible I/O | VIH ≥2.2V, VIL ≤0.8V - eliminates need for bus interface translators in legacy MIL-STD-1553B subsystems |
| Low-power standby mode | ISB = 20mA max (TTL-level CS HIGH) - reduces system cooling load in sealed avionics enclosures |
Applications
| Avionics Mission Computer Memory | Secure Communications Buffer |
|---|---|
Use Scenario: Stores real-time navigation vectors and encrypted message payloads in airborne tactical radios operating under vibration and thermal stress. IC Role / Device Role / Timing Role: Primary SRAM buffer interfacing with TMS320C6713 DSP via 8-bit parallel bus; provides zero-wait-state access during burst-mode decryption. Use Value: 25ns tAA ensures deterministic latency for AES-256 key scheduling; MIL-STD-883 qualification prevents bit corruption during high-G maneuvers. |
Use Scenario: Holds session keys and packet headers in Type 1 cryptographic modules deployed in ground-mobile SATCOM terminals. IC Role / Device Role / Timing Role: Non-volatile shadow RAM backing up FPGA configuration registers; retains critical crypto state during battery switchover. Use Value: 2V data retention allows seamless transition from vehicle power to LiSO₂ backup without key reinitialization or security violation. |
| Tactical Radar Signal Processing | Spacecraft Onboard Telemetry Storage |
Use Scenario: Buffers digitized IF samples from SAR antennas prior to FFT processing in airborne surveillance platforms. IC Role / Device Role / Timing Role: High-bandwidth frame buffer synchronized to ADC clock; supports burst writes at 40MB/s sustained rate. Use Value: 28-pin CDIP package withstands 1000+ thermal cycles per MIL-STD-750 Method 1071 - essential for long-endurance UAV deployments. |
Use Scenario: Stores housekeeping telemetry and fault logs in CubeSat OBCs exposed to deep-space radiation and vacuum. IC Role / Device Role / Timing Role: Radiation-tolerant memory node retaining health data between ground station passes; accessed only during scheduled downlinks. Use Value: Hermetic ceramic DIP packaging prevents moisture ingress and mitigates single-event latchup (SEL) per ESA/SCC Basic Specification No. 22900. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 5962-8855203UA | 35ns access time (vs. 25ns); identical CD28 package and MIL-STD-883 Class B qualification | Acceptable where system timing budget allows +10ns latency; lower cost due to relaxed speed binning | Select when 5962-8855204UA's 25ns performance is not required for CPU wait-state alignment. |
| 5962-9213501MXA | Same 25ns speed but in 28-pin SOJ (PJG28); non-hermetic plastic package; MIL-PRF-38535 Class V rated | Suitable for less severe environments (e.g., ground vehicles); higher density but lower thermal cycling endurance | Choose only if board space constraints prohibit CDIP footprint and radiation tolerance is not required. |
Compared with 5962-8855204UA, the 5962-8855203UA trades speed for cost in identical form factor, while the 5962-9213501MXA sacrifices hermeticity and thermal robustness for compactness - neither offers drop-in replacement without layout or qualification impact.
Availability
5962-8855204UA is available at Aetrix Electronics and suitable for avionics mission computers, secure communications buffers, and tactical radar signal processors requiring stable component supply under ITAR-controlled logistics and long-lifecycle support.
Supply support for 5962-8855204UA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and aerospace markets.
The 5962-8855204UA belongs to Renesas' legacy high-reliability SRAM product line, designed specifically for defense and space applications demanding MIL-STD-883 qualification, extended temperature operation, and hermetic packaging.
FAQ
What is the maximum operating temperature range certified for 5962-8855204UA?
The 5962-8855204UA is fully qualified for continuous operation from –55°C to +125°C per MIL-STD-883 Class B test requirements. This range is validated through thermal cycling, steady-state life, and burn-in testing - making it suitable for engine-mounted avionics and space-qualified electronics where ambient extremes exceed commercial or industrial limits. All AC and DC parameters in the datasheet apply across this full military temperature span.
Does 5962-8855204UA support true battery backup operation below 5V?
Yes, the 5962-8855204UA supports guaranteed data retention at VCC = 2.0V minimum, drawing ≤500μA typical current (IDT71256L variant specification). This capability is explicitly characterized over the full –55°C to +125°C range and enables use in battery-fallback scenarios such as inertial navigation system memory preservation during main power failure. The device remains in retention mode as long as CS is held HIGH and VCC stays ≥2V.
Is 5962-8855204UA pin-compatible with other IDT 71256 variants?
Yes, 5962-8855204UA shares identical pinout and electrical interface with all IDT71256S/L family members in the 28-pin CD28 ceramic DIP package, including 5962-8855203UA (35ns) and 5962-8855205UA (45ns). Address, data, and control signal assignments match exactly - allowing direct substitution where timing margins permit. However, speed-binned variants must be verified for setup/hold timing compliance in the target system.
What package type does 5962-8855204UA use, and is it hermetically sealed?
5962-8855204UA uses a 28-pin 600-mil ceramic dual in-line package (CD28) with gold-plated leads and glass-sealed lid. It is fully hermetic per MIL-STD-883 Method 1014, achieving leak rates <1×10⁻⁸ atm·cc/sec He - critical for long-term reliability in high-humidity or vacuum environments such as aircraft pressurized bays and low-earth orbit satellites.
Can 5962-8855204UA be used in new designs despite its legacy status?
While Renesas lists the underlying IDT71256 family as "not recommended for new designs" in historical documentation, 5962-8855204UA remains actively supported for legacy sustainment and defense retrofit programs. Aetrix Electronics maintains controlled inventory with full traceability, and the part continues to meet current MIL-PRF-38535 requirements. New designs requiring this performance envelope should conduct full qualification per applicable program specifications before integration.
5962-8855204UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Synchronous
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 45ns
- Access Time:
- 45 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-CDIP
5962-8855204UA FAQ
1.How can I place an order for 5962-8855204UA through Aetrix?
Please submit a Request for Quotation (RFQ) for 5962-8855204UA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 5962-8855204UA reliable?
The price and inventory of 5962-8855204UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5962-8855204UA is usually 5 days.
3.What payment methods are accepted for 5962-8855204UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5962-8855204UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5962-8855204UA?
5962-8855204UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5962-8855204UA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 5962-8855204UA?
For technical support, including 5962-8855204UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5962-8855204UA requirements.
6.How does Aetrix verify that 5962-8855204UA is sourced from the original manufacturer or authorized distributors?
All 5962-8855204UA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 5962-8855204UA meets industry standards.
7.What is the process for return or replacement of 5962-8855204UA?
All 5962-8855204UA units undergo pre-shipment inspection (PSI). If there is an issue with 5962-8855204UA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 5962-8855204UA part is unused and in its original packaging.
Return procedure for 5962-8855204UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5962-8855204UA Tags
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