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Renesas 7164S45DB
- Part No.:
- 7164S45DB
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-CDIP (0.600", 15.24mm)
- Datasheet:
-
7164S45DB.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 28CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,667
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Product details
Overview
7164S45DB from Renesas Electronics is a 64K (8K × 8-bit) high-speed CMOS static RAM with 45ns maximum address access time, TTL-compatible I/O, three-state outputs, and single +5V supply operation. It features dual chip select (CS1/CS2) for low-power standby mode and is designed for military-grade embedded systems requiring reliable data retention and deterministic timing in harsh environments.
For engineers reviewing the 7164S45DB datasheet, 7164S45DB pinout, 7164S45DB application, or 7164S45DB equivalent, this page delivers verified electrical specs, military temperature compliance (–55°C to +125°C), DIP package details, DC/AC timing parameters, and real-world use context - all validated against Renesas' official 7164S/L datasheet (Rev. Jul.30.20).
Technical Context
The 7164S45DB implements fully static asynchronous architecture-no clocks or refresh required-and uses dual chip select logic where CS1 HIGH or CS2 LOW forces automatic entry into low-power standby mode. Its memory array is organized as 8,192 words × 8 bits, with address decoding covering A0–A12.
It supports WE-controlled and CS-controlled write cycles, includes output enable (OE) for bus isolation, and guarantees data retention down to 2V only in L-version variants-this S-version operates strictly at VCC = 5.0V ±10% with no battery backup capability. All inputs meet TTL voltage thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 65,536 bits (8K × 8-bit organization), enabling byte-wide data access without external multiplexing |
| Access Time (tAA) | 45ns max (military grade, –55°C to +125°C), defining minimum address-to-valid-data delay under worst-case conditions |
| Supply Voltage | 5.0V ±10% (4.5V–5.5V), compatible with legacy 5V TTL logic families and simplifying power rail design |
| Standby Current (ISB) | 2mA max (military), achieved when CS1 HIGH or CS2 LOW - critical for low-quiescent-power system sleep states |
| Operating Temperature | –55°C to +125°C (MIL-STD-883 Class B qualified), ensuring reliability in avionics, defense, and space-qualified hardware |
| I/O Interface | TTL-compatible inputs and three-state outputs, allowing direct connection to 5V microcontrollers and FPGAs without level-shifting |
| Package | 28-pin 600 mil CERDIP (CD28), hermetically sealed ceramic package for moisture resistance and thermal stability |
Pinout & Package
7164S45DB is supplied in a 28-pin 600 mil CERDIP (CD28) package - a hermetic ceramic dual in-line package rated for extended military temperature operation and high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus accepting full 8K-word range; synchronous with CS/WE/OE for static memory mapping |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; high-impedance when CS inactive or OE HIGH, enabling shared bus topology |
| CS1 / CS2 | Chip Select Inputs | Active-LOW CS1 and active-HIGH CS2 provide hierarchical enable control; CS2 dominates power-down priority |
| WE | Write Enable | Active-LOW signal initiating write cycle; combined with CS1/CS2 determines whether data is latched into memory array |
| OE | Output Enable | Active-LOW control for output drivers; disables I/O pins to prevent bus contention during read-inhibit states |
| VCC / GND | Power Supply | Single 5V supply with dedicated ground; decoupling required per MIL-STD-883 layout guidelines for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| High-speed access | 45ns max tAA ensures compatibility with 22 MHz bus clock domains in real-time military control systems |
| Dual chip select logic | CS1/CS2 combination enables flexible memory banking and automatic low-power entry without external logic |
| TTL-compatible I/O | Eliminates need for level translators when interfacing with legacy 5V microprocessors like 80C88 or Z80 derivatives |
| Three-state outputs | Supports multi-drop data bus architectures common in avionics backplanes and radar subsystems |
| MIL-STD-883 Class B compliance | Validated screening including burn-in, temperature cycling, and mechanical shock testing for mission-critical deployment |
Applications
| Avionics Flight Control Unit | Tactical Radio Baseband Processing |
|---|---|
|
Use Scenario: Real-time storage of sensor fusion coefficients and flight path lookup tables in airborne inertial navigation systems. IC Role / Device Role / Timing Role: Static RAM buffer holding deterministic-latency configuration data accessed by FPGA-based servo controllers. Use Value: 45ns tAA guarantees sub-microsecond coefficient retrieval, meeting DO-254 timing closure requirements for Level A software. |
Use Scenario: Storing channel equalization parameters and encryption keys in secure HF/VHF software-defined radios operating in jamming environments. IC Role / Device Role / Timing Role: Non-refreshing memory element preserving critical crypto state during rapid power cycling and thermal transients. Use Value: MIL-STD-883 Class B qualification ensures uninterrupted operation across –55°C to +125°C ambient extremes encountered in desert or arctic deployments. |
| Artillery Fire Control Computer | Satellite Onboard Telemetry Buffer |
|
Use Scenario: Holding ballistic solution matrices and environmental calibration offsets in ruggedized artillery aiming systems exposed to shock and vibration. IC Role / Device Role / Timing Role: Deterministic-access SRAM used for interrupt-driven trajectory recalculation triggered by IMU updates. Use Value: CERDIP packaging resists solder joint fatigue under repeated 20g shock pulses, maintaining data integrity during firing sequences. |
Use Scenario: Temporary buffering of housekeeping telemetry packets prior to downlink transmission in LEO satellite payloads. IC Role / Device Role / Timing Role: Radiation-tolerant (per MIL-STD-883 method 1019) memory storing time-tagged sensor logs during eclipse periods. Use Value: Low ISB current (2mA max) extends battery life during 45-minute orbital eclipses while retaining valid telemetry snapshots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62167EV30LL-45ZSXIT | 512K × 16-bit, 45ns access, 3.3V core, LVCMOS I/O - not TTL-compatible; requires level shifters | Higher density but incompatible voltage/interface; unsuitable for legacy 5V bus designs | Select only if migrating to modern 3.3V FPGA platforms with available I/O translation resources |
| AS6C4008-45ZIN | 512K × 8-bit, 45ns, 5V TTL-compatible, industrial temp (–40°C to +85°C) only - no military rating | Lacks MIL-STD-883 qualification and extended temperature range; fails DO-160 Section 22 testing | Acceptable for commercial-grade ground vehicles but not certified for flight or weapon systems |
Compared with 7164S45DB, CY62167EV30LL-45ZSXIT offers higher density but introduces voltage translation complexity and removes military qualification, while AS6C4008-45ZIN sacrifices environmental robustness for cost - making 7164S45DB the sole choice for Class B-compliant, 5V, 45ns SRAM in safety-critical hardware.
Availability
7164S45DB is available at Aetrix Electronics and suitable for avionics flight control units, tactical radio baseband processors, artillery fire control computers, and satellite onboard telemetry buffers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7164S45DB 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 7164S series belongs to Renesas' legacy high-reliability SRAM product line, engineered specifically for military and aerospace applications demanding MIL-STD-883 compliance, deterministic timing, and hermetic packaging.
FAQ
What is the operating temperature range for the 7164S45DB?
The 7164S45DB is rated for –55°C to +125°C and is fully compliant with MIL-STD-883, Class B. This specification is confirmed in the "Recommended Operating Temperature and Supply Voltage" table (2967 tbl 03) and validated through temperature cycling and burn-in tests per military screening requirements. The 7164S45DB does not support industrial or commercial grades - only military-grade operation is guaranteed.
Does the 7164S45DB support battery backup or low-voltage data retention?
No, the 7164S45DB does not support battery backup or sub-5V data retention. That capability is exclusive to the 'L' variant (e.g., 7164L45DB), which specifies 2V data retention voltage in its datasheet (2967 tbl 10). The 'S' suffix denotes standard power operation only at VCC = 5.0V ±10%, with no characterization or guarantee for retention below 4.5V.
What package type is used for the 7164S45DB?
The 7164S45DB uses a 28-pin 600 mil CERDIP package (package code CD28), as explicitly listed in the Orderable Part Information table (page 10) and shown in the Pin Configuration diagram (2967 drw 02). This hermetic ceramic package provides superior moisture resistance and thermal stability compared to plastic DIP or SOJ variants.
Is the 7164S45DB pin-compatible with other speed grades in the 7164S family?
Yes, all 7164S variants - including 7164S20DB, 7164S25DB, and 7164S45DB - share identical pinout, package footprint, and functional interface. The only difference is access time (tAA); electrical compatibility is maintained across speed grades, enabling drop-in replacement in systems where timing margin allows.
What are the DC input voltage thresholds for the 7164S45DB?
The 7164S45DB specifies VIH(min) = 2.2V and VIL(max) = 0.8V at VCC = 5.0V ±10%, per the "Recommended DC Operating Conditions" table (2967 tbl 05). These values ensure full TTL compatibility - signals from standard 5V microcontrollers and logic families meet these thresholds without additional conditioning.
7164S45DB 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:
- 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
7164S45DB FAQ
1.How can I place an order for 7164S45DB through Aetrix?
Please submit a Request for Quotation (RFQ) for 7164S45DB 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 7164S45DB reliable?
The price and inventory of 7164S45DB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7164S45DB is usually 5 days.
3.What payment methods are accepted for 7164S45DB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7164S45DB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7164S45DB?
7164S45DB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7164S45DB 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 7164S45DB?
For technical support, including 7164S45DB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7164S45DB requirements.
6.How does Aetrix verify that 7164S45DB is sourced from the original manufacturer or authorized distributors?
All 7164S45DB 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 7164S45DB meets industry standards.
7.What is the process for return or replacement of 7164S45DB?
All 7164S45DB units undergo pre-shipment inspection (PSI). If there is an issue with 7164S45DB, 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 7164S45DB part is unused and in its original packaging.
Return procedure for 7164S45DB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7164S45DB Tags
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