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Renesas 5962-8855202UA
- Part No.:
- 5962-8855202UA
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-CDIP (0.300", 7.62mm)
- Datasheet:
-
5962-8855202UA.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,512
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Product details
Overview
5962-8855202UA 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, radar processors, and hardened embedded controllers.
For engineers reviewing the 5962-8855202UA datasheet, 5962-8855202UA pinout, 5962-8855202UA application, or 5962-8855202UA equivalent, key selection criteria include military temperature operation, 28-pin ceramic DIP package compatibility, CS-controlled write timing, and verified 25ns read cycle performance under full MIL-spec conditions.
Technical Context
This device implements a fully decoded 15-bit address space (A0–A14) driving a 262,144-bit SRAM array with bidirectional 8-bit I/O (I/O0–I/O7). Control logic uses three active-low enables: Chip Select (CS), Write Enable (WE), and Output Enable (OE), supporting both WE- and CS-controlled write cycles per MIL-STD-883 test methods.
It employs high-reliability CMOS fabrication with dual standby modes: TTL-level standby (ISB = 20mA) when CS > VIH, and CMOS-level full standby (ISB1 = 20mA) when CS > VHC. Data retention at 2V is exclusive to L-version variants; the 5962-8855202UA is an S-version, confirming no battery backup capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), fixed parallel interface |
| Access Time (tAA) | 25ns max - guarantees deterministic read latency in real-time military control loops |
| Supply Voltage | 5V ±10% - compatible with legacy 5V TTL/CMOS system rails without level shifting |
| Operating Temperature | –55°C to +125°C - qualified for airborne, missile, and space-qualified chassis environments |
| Package | 28-pin ceramic DIP (600 mil, CD28) - hermetically sealed, MIL-STD-883 Class B screened |
| Power Consumption | 135mA dynamic ICC (max), 20mA ISB standby - enables thermal management in conduction-cooled enclosures |
| Input Compatibility | TTL-compatible VIH/VIL thresholds - interoperable with 74LS/AS logic without interface buffers |
Pinout & Package
5962-8855202UA is supplied in a 28-pin ceramic dual in-line package (CD28, 600 mil width), hermetically sealed and MIL-STD-883 Class B qualified for high-reliability deployment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit unidirectional address bus; fully decoded to select one of 32,768 memory locations |
| I/O0–I/O7 | Data Input/Output | Bidirectional 8-bit data bus; high-impedance when CS or OE inactive, drives/receives TTL levels |
| CS | Chip Select | Active-low enable; asserts memory access and controls standby entry/exit per MIL-STD-883 timing requirements |
| WE | Write Enable | Active-low write strobe; determines write cycle initiation mode (WE- or CS-controlled per AC Table 13) |
| OE | Output Enable | Active-low output gate; isolates I/O bus during reads when CS active but OE inactive |
| 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 in EMI-hardened systems |
Key Features
| Feature | Design Value |
|---|---|
| MIL-STD-883 Class B screening | Full qualification including burn-in, mechanical shock, vibration, and hermeticity testing for flight-critical use |
| 25ns military-grade access | Guaranteed tAA ≤ 25ns across –55°C to +125°C - enables deterministic timing in radar pulse processing |
| TTL-compatible I/O interface | No external level shifters needed when interfacing with legacy 74-series or ASIC address/data buses |
| Dual standby power modes | ISB = 20mA (TTL-level CS), ISB1 = 20mA (CMOS-level CS) - supports hierarchical power gating in multi-SRAM systems |
| 28-pin ceramic DIP (CD28) | 600-mil width, glass-sealed construction - provides superior moisture resistance and thermal cycling endurance vs. plastic packages |
Applications
| Avionics Flight Control Unit Memory | Tactical Radar Signal Buffer |
|---|---|
Use Scenario: Stores real-time sensor fusion coefficients and actuator command tables in fly-by-wire ECUs. IC Role / Device Role / Timing Role: Primary volatile program/data memory with deterministic 25ns read access for closed-loop servo updates. Use Value: MIL-STD-883 Class B reliability ensures uninterrupted operation during high-G maneuvers and thermal transients. |
Use Scenario: Buffers digitized IF samples between ADC and FFT engine in ground-based surveillance radar. IC Role / Device Role / Timing Role: High-speed circular buffer supporting burst-mode acquisition at 40 MSPS equivalent throughput. Use Value: 28-pin CDIP package withstands thermal shock during rapid radar duty-cycle transitions. |
| Missile Guidance Onboard Computer | Secure Communications Crypto Module |
Use Scenario: Holds navigation state vectors and Kalman filter matrices updated at 1kHz in inertial measurement units. IC Role / Device Role / Timing Role: Low-latency scratchpad memory enabling sub-millisecond interrupt response for guidance correction. Use Value: Guaranteed –55°C to +125°C operation prevents cold-soak failure during high-altitude launch profiles. |
Use Scenario: Stores ephemeral session keys and encrypted packet payloads in Type 1 cryptographic hardware. IC Role / Device Role / Timing Role: Tamper-resilient working memory with fast write cycles (tWP = 40ns) for key derivation sequences. Use Value: Ceramic DIP package resists physical probing attempts better than plastic SOJ alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-reliability SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 5962-8957201XA | Same 32K×8 organization, 35ns access, CD28 package, but rated –55°C to +125°C with 100ns max tRC | Suitable for less timing-critical subsystems where 35ns latency is acceptable | Select when system timing budget allows relaxed access time and lower cost is prioritized |
| 5962-9213201MXA | 256K×8 configuration, 25ns access, but uses 32-pin LCC package and requires different PCB footprint | Used in newer designs with surface-mount constraints and higher density routing | Choose only if redesigning board layout to accommodate LCC; not drop-in compatible |
Compared with 5962-8855202UA, the 5962-8957201XA trades 10ns speed for broader availability and lower procurement risk, while the 5962-9213201MXA offers identical speed but demands PCB rework due to LCC packaging - making 5962-8855202UA optimal for legacy CDIP-based military platforms requiring guaranteed 25ns performance.
Availability
5962-8855202UA is available at Aetrix Electronics and suitable for avionics, radar signal processing, and missile guidance systems requiring stable component supply under extended military lifecycle management.
Supply support for 5962-8855202UA 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 5962-8855202UA belongs to Renesas' legacy military SRAM product line, designed specifically for high-reliability embedded systems demanding MIL-STD-883 qualification, extreme temperature resilience, and deterministic timing behavior.
FAQ
What is the maximum operating temperature range certified for the 5962-8855202UA?
The 5962-8855202UA is certified for continuous operation from –55°C to +125°C per MIL-STD-883 Class B environmental testing. This rating is validated through temperature cycling, steady-state burn-in, and parametric verification at both extremes - ensuring functionality in jet engine bays, missile canisters, and space-qualified payload bays where thermal gradients exceed commercial or industrial limits.
Does the 5962-8855202UA support battery backup data retention?
No, the 5962-8855202UA is the standard-power (S) variant and does not support battery backup data retention. Only L-version parts (e.g., 5962-8855203UA) specify 2V data retention per Table 11. The 5962-8855202UA draws 20mA in standby (ISB) and requires continuous 5V supply to maintain memory state - critical for systems where external backup circuitry is managed separately.
Which package type is used by the 5962-8855202UA?
The 5962-8855202UA uses a 28-pin ceramic dual in-line package (CD28, 600 mil width), as confirmed in the Ordering Information table (page 10) and Pin Configuration diagram (page 2). This hermetically sealed ceramic DIP meets MIL-STD-883 mechanical and environmental requirements, distinguishing it from plastic DIP or SOJ variants used in commercial versions.
Is the 5962-8855202UA pin-compatible with other IDT 71256 variants?
Yes, the 5962-8855202UA shares identical pinout and function mapping with all IDT 71256S/L military variants in the CD28 package, including 5962-8855201XA (35ns) and 5962-8855204XA (45ns). Pin assignments for A0–A14, I/O0–I/O7, CS, WE, OE, VCC, and GND are consistent across this family - enabling direct substitution where timing and temperature requirements align.
What write timing mode does the 5962-8855202UA support?
The 5962-8855202UA supports both WE-controlled and CS-controlled write cycles, as defined in Timing Waveforms 10 and 11 and AC Table 13. In WE-controlled mode, write occurs on WE LOW overlap with CS LOW; in CS-controlled mode, WE remains HIGH and CS LOW initiates the write - providing flexibility for legacy bus architectures with varying control signal timing budgets.
5962-8855202UA 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:
- 70ns
- Access Time:
- 70 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
5962-8855202UA FAQ
1.How can I place an order for 5962-8855202UA through Aetrix?
Please submit a Request for Quotation (RFQ) for 5962-8855202UA 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 5962-8855202UA reliable?
The price and inventory of 5962-8855202UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5962-8855202UA is usually 5 days.
3.What payment methods are accepted for 5962-8855202UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5962-8855202UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5962-8855202UA?
5962-8855202UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5962-8855202UA 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 5962-8855202UA?
For technical support, including 5962-8855202UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5962-8855202UA requirements.
6.How does Aetrix verify that 5962-8855202UA is sourced from the original manufacturer or authorized distributors?
All 5962-8855202UA 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 5962-8855202UA meets industry standards.
7.What is the process for return or replacement of 5962-8855202UA?
All 5962-8855202UA units undergo pre-shipment inspection (PSI). If there is an issue with 5962-8855202UA, 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 5962-8855202UA part is unused and in its original packaging.
Return procedure for 5962-8855202UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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