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Renesas 7164S70DB
- Part No.:
- 7164S70DB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-CDIP (0.600", 15.24mm)
- Datasheet:
-
7164S70DB.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,767
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Product details
Overview
7164S70DB from Renesas Electronics is a 64K (8K × 8-bit) high-speed CMOS static RAM with 70 ns maximum address access time, TTL-compatible I/O, single 5V supply operation, and three-state outputs. It features dual chip select (CS1/CS2) for low-power standby mode activation and is designed for military-grade embedded systems requiring reliable non-refreshing memory in harsh environments.
For engineers reviewing the 7164S70DB datasheet, 7164S70DB pinout, 7164S70DB application, or 7164S70DB equivalent, this page delivers verified timing parameters, military temperature compliance (–55°C to +125°C), package-specific pin mapping, DC/AC electrical characteristics, and real-world use context for legacy avionics, defense computing, and industrial control subsystems.
Technical Context
The 7164S70DB implements fully static asynchronous architecture-no clocks or refresh cycles required-and uses dual chip select logic where CS1 LOW + CS2 HIGH enables active read/write, while CS1 HIGH or CS2 LOW forces automatic low-power standby. Its CMOS process ensures compatibility with TTL voltage levels across all inputs and outputs.
It supports two distinct power states: active operation at ICC ≤ 110 mA (max) and standby at ISB ≤ 5 mA (max), with guaranteed data retention down to 0 V during power loss only in L-version variants-not applicable to the S-series 7164S70DB. The device is unidirectional on data lines, using OE for output enable and WE for write control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8-bit (65,536 bits), fixed parallel interface with no internal multiplexing |
| Access Time (tAA) | 70 ns max - defines minimum time from valid address to stable data output under military conditions |
| Supply Voltage | 5.0 V ±10% - single-rail operation simplifies power design; no auxiliary supplies needed |
| Operating Temperature | –55°C to +125°C - MIL-STD-883 Class B qualified for sustained operation in extreme thermal environments |
| Input Compatibility | TTL-compatible VIH ≥ 2.2 V, VIL ≤ 0.8 V - interoperable with legacy 5V logic families without level shifting |
| Output Drive | Three-state CMOS outputs with VOH ≥ 2.4 V (IOH = –4 mA), VOL ≤ 0.5 V (IOL = 10 mA) - drives standard TTL loads directly |
| Power Dissipation | 1.0 W max - defined under absolute maximum ratings; typical active ICC = 90 mA at 5V, 25°C |
Pinout & Package
7164S70DB is supplied in a 28-pin 600 mil CERDIP (CD28) package - hermetically sealed ceramic dual in-line with 0.6-inch width, suitable for high-reliability military PCB assemblies requiring moisture resistance and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus accepting full 8K address space; no internal latching - must be stable before CS activation |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; direction controlled by WE and OE - high-impedance when deselected or during write setup |
| CS1, CS2 | Chip Select Inputs | Active-LOW CS1 and active-HIGH CS2 form AND-gated selection; CS2 LOW overrides CS1 to force standby |
| WE | Write Enable | Active-LOW control for write cycles; concurrent LOW WE + active CS enables data capture on rising edge of WE |
| OE | Output Enable | Active-LOW control for output drivers; independent of WE - allows read-modify-write sequences |
| VCC, GND | Power Supply | Single 5V supply with dedicated ground; decoupling required per MIL-STD-883 layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Fully static operation | No clock, no refresh - eliminates system-level timing constraints and DRAM controller overhead |
| Dual chip select architecture | CS1/CS2 logic enables precise power gating: standby current ISB ≤ 5 mA reduces system-level power budget |
| TTL-compatible signaling | Direct interface with 74LS/ALS logic families - avoids level translators in legacy board designs |
| MIL-STD-883 Class B compliance | Qualified for military applications including screening, burn-in, and environmental stress testing per specification |
| Three-state outputs | Enables bus sharing across multiple SRAMs or peripherals on common data lines without external buffers |
Applications
| Avionics Flight Control Computers | Tactical Radio Baseband Processing |
|---|---|
Use Scenario: Real-time storage of sensor fusion coefficients and flight control law parameters in airborne mission computers. IC Role / Device Role / Timing Role: Non-volatile shadow RAM holding critical configuration data during processor reset or brownout events. Use Value: 70 ns access ensures deterministic response within hard real-time deadlines; MIL-STD-883 qualification guarantees operation at –55°C to +125°C under vibration and shock. |
Use Scenario: Buffering of digitally modulated IF samples between ADC/DAC and FPGA-based channel processors in manpack radios. IC Role / Device Role / Timing Role: High-speed scratchpad memory supporting burst-mode data transfers at up to 14.3 MB/s (1/70 ns). Use Value: Three-state outputs allow seamless integration into shared data buses; TTL compatibility eliminates signal integrity risks in mixed-technology backplanes. |
| Ground Vehicle Engine Control Units | Naval Sonar Signal Acquisition Modules |
Use Scenario: Storing calibrated fuel injection maps and emission control tables in diesel engine ECUs deployed in desert or arctic environments. IC Role / Device Role / Timing Role: Primary working memory for microcontroller firmware executing closed-loop combustion control loops. Use Value: Dual CS logic enables dynamic power-down during idle cycles - reducing total ECU quiescent current by >85% versus always-on alternatives. |
Use Scenario: Capturing high-fidelity acoustic return data from phased-array transducers prior to FFT processing in submarine sonar systems. IC Role / Device Role / Timing Role: Low-latency frame buffer synchronizing ADC sampling clocks with DSP execution pipelines. Use Value: CERDIP packaging provides hermetic sealing against salt fog and humidity; 600-mil footprint matches legacy naval PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-10TLI | 3.3V supply, 10 ns access, 256K × 16 organization, LVCMOS I/O | Requires level-shifting for 5V systems; larger density but incompatible bus width | Select only for new 3.3V designs needing higher bandwidth; not drop-in for 7164S70DB |
| AS6C4008-70ZIN | 5V supply, 70 ns access, same 8K × 8 organization, industrial temp (–40°C to +85°C) | Lacks MIL-STD-883 qualification and CERDIP packaging; lower reliability screening | Acceptable for commercial/industrial upgrades where military spec is not mandated |
Compared with IS61LV25616AL-10TLI and AS6C4008-70ZIN, the 7164S70DB uniquely delivers military-grade reliability in hermetic CERDIP packaging with proven 5V TTL interoperability - essential for sustaining legacy defense platforms without redesigning power or interface layers.
Availability
7164S70DB is available at Aetrix Electronics and suitable for avionics flight control computers, tactical radio baseband processing, and ground vehicle engine control units requiring stable component supply across extended product lifecycles.
Supply support for 7164S70DB 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 infrastructure markets.
The 7164S70DB belongs to Renesas' legacy high-reliability SRAM product line, engineered specifically for military and aerospace applications demanding long-term availability, extended temperature operation, and rigorous quality assurance.
FAQ
What is the operating temperature range for the 7164S70DB?
The 7164S70DB is rated for –55°C to +125°C operation and is fully compliant with MIL-STD-883, Class B. This military-grade temperature range is validated through environmental stress screening and burn-in testing, making the 7164S70DB suitable for deployment in aircraft, armored vehicles, and shipboard systems where ambient extremes are routine.
Does the 7164S70DB support battery backup data retention?
No, the 7164S70DB does not support battery backup data retention. That feature is exclusive to the L-version variants (e.g., 7164L70DB), which specify a 2V data retention voltage. The S-version, including the 7164S70DB, is optimized for standard power operation and lacks the low-VCC retention circuitry.
What package type is used for the 7164S70DB?
The 7164S70DB is packaged in a 28-pin 600 mil CERDIP (CD28) - a hermetically sealed ceramic dual in-line package with 0.6-inch body width. This package meets stringent military reliability requirements, including resistance to moisture ingress, thermal cycling, and mechanical shock.
Can the 7164S70DB be used with modern 3.3V microcontrollers?
The 7164S70DB operates exclusively at 5V and features TTL-compatible I/O thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V). Direct interfacing with 3.3V microcontrollers requires level translation, as its inputs are not 5V-tolerant and outputs exceed 3.3V logic-high limits. For native 3.3V designs, consider newer SRAM families like IS61WV series instead of the 7164S70DB.
Is the 7164S70DB still recommended for new designs?
Renesas discontinued "Not recommended for new designs" status in February 2001, and the 7164S70DB remains actively supported for legacy program continuity. While newer densities and voltages exist, the 7164S70DB is maintained for obsolescence management in certified military and aerospace systems where requalification costs outweigh migration benefits.
7164S70DB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-CDIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K 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
7164S70DB FAQ
1.How can I place an order for 7164S70DB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7164S70DB 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 7164S70DB reliable?
The price and inventory of 7164S70DB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7164S70DB is usually 5 days.
3.What payment methods are accepted for 7164S70DB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7164S70DB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7164S70DB?
7164S70DB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7164S70DB 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 7164S70DB?
For technical support, including 7164S70DB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7164S70DB requirements.
6.How does Aetrix verify that 7164S70DB is sourced from the original manufacturer or authorized distributors?
All 7164S70DB 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 7164S70DB meets industry standards.
7.What is the process for return or replacement of 7164S70DB?
All 7164S70DB units undergo pre-shipment inspection (PSI). If there is an issue with 7164S70DB, 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 7164S70DB part is unused and in its original packaging.
Return procedure for 7164S70DB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7164S70DB Tags
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AT24C02C-XHM-T
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