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Renesas M5M5256DVP-70LLIBE
- Part No.:
- M5M5256DVP-70LLIBE
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
M5M5256DVP-70LLIBE.pdf
- Description:
- SRAM 5V 256K-BIT 32K X 8
- Quantity:
- Payment:
- Shipping:
Inventory:6,612
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Product details
Overview
M5M5256DVP-70LLIBE from Renesas is a 262,144-bit (32,768-word × 8-bit) CMOS static RAM in a 28-pin TSOP package, operating from a single +5V supply with 70 ns access time, TTL-compatible I/O, and battery backup capability down to +2.0 V. It serves as main or buffer memory in embedded controllers, industrial PLCs, and legacy instrumentation requiring low-power standby and simple parallel bus interfacing.
For engineers reviewing the M5M5256DVP-70LLIBE datasheet, M5M5256DVP-70LLIBE pinout, M5M5256DVP-70LLIBE application, or M5M5256DVP-70LLIBE equivalent, key selection criteria include its 70 ns /S-controlled read cycle, 0.05 µA typical standby current at Vcc = 5.5 V, three-state OR-tie outputs, and TSOP-28 footprint compatibility with legacy memory designs.
Technical Context
This SRAM uses resistive-load NMOS memory cells with CMOS periphery for high density and low power. Its operation relies on three control signals-/S (chip select), /W (write enable), and /OE (output enable)-to define non-selection, read, write, and standby modes via a deterministic function table.
The device supports both /S-control and /W-control write modes, with timing validated under AC conditions at Vcc = 5 V ±10%. Data hold is guaranteed at Vcc ≥ +2.0 V, enabling reliable battery-backed data retention during power failure without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32,768 words × 8 bits = 262,144 bits; supports byte-wide parallel data bus interface |
| Access time | 70 ns max (tCR, ta(S)); defines minimum read cycle interval for 14.3 MHz burst operation |
| Standby current | 0.05 µA typical at Vcc = 5.5 V; enables >1-year battery backup with CR2032 |
| Supply voltage | +5 V ±10%; no auxiliary supplies or regulators required |
| I/O compatibility | Fully TTL-compatible inputs and outputs; interfaces directly with 74LS/ALS logic without level shifters |
| Data retention voltage | Holds valid data down to +2.0 V; supports graceful shutdown and brown-out recovery |
| Operating temperature | 0 °C to +70 °C; qualified for commercial and industrial ambient environments |
Pinout & Package
Package: 28-pin Thin Small Outline Package (TSOP-I), 8 mm × 13.4 mm, outline code 28P2C-A, lead pitch 0.55 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address inputs | 15-bit address bus; selects one of 32,768 memory locations |
| DQ1–DQ8 | Bi-directional data I/O | Common 8-bit data path; high-impedance when /OE or /S high |
| /S | Chip select | Active-low enable; controls device selection and entry into standby mode |
| /W | Write enable | Active-low; initiates write cycle when overlapped with active /S |
| /OE | Output enable | Active-low; gates output drivers to prevent bus contention during writes |
| Vcc | Power supply | +5 V supply pin; powers core and I/O circuits |
| GND | Ground | Reference return for all signals and power |
Key Features
| Feature | Design Value |
|---|---|
| No clock or refresh required | Eliminates system-level timing overhead and refresh controller logic |
| Three-state outputs with OR-tie capability | Enables direct connection of multiple SRAMs to shared data bus without external bus transceivers |
| Direct TTL compatibility | Accepts standard TTL logic levels on all inputs and drives TTL loads on outputs without interface components |
| Battery backup support | Retains data at Vcc ≥ +2.0 V; allows seamless transition to backup power during main supply loss |
| Low active supply current | 50 mA max during read/write cycles; reduces thermal load in dense memory arrays |
Applications
| Industrial PLC Memory Buffer | Legacy Medical Instrument Data Log |
|---|---|
Use Scenario: Storing real-time sensor readings and control state history in programmable logic controllers with limited board space. IC Role / Device Role / Timing Role: Byte-wide static RAM providing non-refreshed, deterministic-access scratchpad memory for firmware-managed buffers. Use Value: 70 ns access time ensures sub-microsecond response to CPU read requests; 0.05 µA standby current extends battery life in fanless enclosures. | Use Scenario: Capturing diagnostic waveforms and calibration parameters in portable ECG units during power-down intervals. IC Role / Device Role / Timing Role: Battery-backed memory holding critical patient data across power cycles without volatile loss. Use Value: Guaranteed data retention at +2.0 V enables use of single-cell lithium coin batteries; TSOP-28 footprint fits compact PCB layouts. |
| Embedded Controller Boot ROM Extension | Point-of-Sale Terminal Transaction Cache |
Use Scenario: Expanding local code/data storage for microcontrollers lacking sufficient internal SRAM for bootloader staging. IC Role / Device Role / Timing Role: Parallel-mapped memory mapped into CPU address space for fast instruction fetch and variable storage. Use Value: TTL compatibility eliminates level-shifting components; 28-pin TSOP simplifies routing versus DIP or SOIC alternatives. | Use Scenario: Caching receipt line items and tax calculations in retail terminals where transaction integrity must survive brief AC outages. IC Role / Device Role / Timing Role: Non-volatile cache holding uncommitted transactions until safe commit to flash or host. Use Value: /S-controlled standby mode cuts power to <0.1 µA during idle; OR-tie outputs allow multi-chip expansion without bus arbitration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-70TLI | 16-bit bus width, 512 Kbit density, 3.3 V only, 70 ns access | Requires 3.3 V system and wider data bus; not drop-in compatible | Select when migrating to 3.3 V systems and needing higher density or wider bus |
| AS6C4008-70ZIN | 8-bit bus, 512 Kbit density, +5 V supply, 70 ns access, 28-pin SOJ | Different package (SOJ vs TSOP); same pin count but incompatible footprint and solder profile | Choose for through-hole or SOJ-based legacy boards where rework is acceptable |
Compared with IS61LV25616AL-70TLI and AS6C4008-70ZIN, the M5M5256DVP-70LLIBE offers native +5 V operation and TSOP-28 packaging optimized for surface-mount industrial PCBs, while delivering proven reliability in battery-backed, low-standby-current applications where 256 Kbit capacity suffices.
Availability
M5M5256DVP-70LLIBE is available at Aetrix Electronics and suitable for industrial PLCs, legacy medical instruments, and embedded controller memory expansion requiring stable component supply, long-lifecycle support, and verified TSOP-28 footprint compatibility.
Supply support for M5M5256DVP-70LLIBE 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 enterprise applications.
The M5M5256DVP-70LLIBE belongs to Renesas' legacy CMOS SRAM product line, designed specifically for cost-sensitive, space-constrained embedded systems requiring zero-refresh, battery-backed, +5 V parallel memory with industrial temperature tolerance.
FAQ
What is the maximum access time specification for the M5M5256DVP-70LLIBE?
The M5M5256DVP-70LLIBE has a maximum read cycle time (tCR) and chip select access time (ta(S)) of 70 ns at Vcc = 5 V ±10% and TA = +70 °C. This value is guaranteed across the full commercial temperature range and defines the minimum interval between successive read operations in /S-controlled mode. The M5M5256DVP-70LLIBE datasheet confirms this timing under standard AC test conditions with CL = 100 pF.
Does the M5M5256DVP-70LLIBE support battery backup operation?
Yes, the M5M5256DVP-70LLIBE supports battery backup: it retains stored data at supply voltages as low as +2.0 V, with standby current dropping to 0.05 µA typical at Vcc = 5.5 V. This enables integration with coin-cell batteries (e.g., CR2032) for uninterrupted data retention during main power loss. The M5M5256DVP-70LLIBE achieves this without external circuitry due to its internal low-voltage retention design.
Is the M5M5256DVP-70LLIBE pin-compatible with other variants in the M5M5256D family?
Yes, the M5M5256DVP-70LLIBE shares identical pinout and function mapping with all M5M5256DVP variants (e.g., -55LL, -70LLI) and M5M5256DFP variants in 28-pin packages. All use the same TSOP-28 (28P2C-A) footprint and signal assignments-including A0–A14, DQ1–DQ8, /S, /W, /OE, Vcc, and GND-enabling direct substitution within the same package type without PCB changes.
What logic family is the M5M5256DVP-70LLIBE compatible with?
The M5M5256DVP-70LLIBE is fully TTL-compatible: its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive strength (VOH = 2.4 V min at IOH = −1 mA, VOL = 0.4 V max at IOL = 2 mA) meet standard TTL electrical specifications. This allows direct interfacing with 74LS, 74ALS, and other TTL-family logic without level shifters or pull-up resistors. The M5M5256DVP-70LLIBE maintains this compatibility across its full operating temperature range.
Can the M5M5256DVP-70LLIBE be used in systems requiring extended temperature operation?
No-the M5M5256DVP-70LLIBE is rated for 0 °C to +70 °C operation only. While the related M5M5256DVP-70LLI variant supports −40 °C to +85 °C, the M5M5256DVP-70LLIBE's qualification and characterization data (including Icc, timing, and retention) are specified exclusively for the commercial temperature range. Using the M5M5256DVP-70LLIBE outside 0–70 °C may result in undetected data corruption or timing violations.
M5M5256DVP-70LLIBE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- -
- Memory Format:
- -
- Technology:
- -
- Memory Size:
- -
- Memory Organization:
- -
- Memory Interface:
- -
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
M5M5256DVP-70LLIBE FAQ
1.How can I place an order for M5M5256DVP-70LLIBE through Aetrix?
Please submit a Request for Quotation (RFQ) for M5M5256DVP-70LLIBE 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 M5M5256DVP-70LLIBE reliable?
The price and inventory of M5M5256DVP-70LLIBE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M5M5256DVP-70LLIBE is usually 5 days.
3.What payment methods are accepted for M5M5256DVP-70LLIBE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M5M5256DVP-70LLIBE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M5M5256DVP-70LLIBE?
M5M5256DVP-70LLIBE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M5M5256DVP-70LLIBE 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 M5M5256DVP-70LLIBE?
For technical support, including M5M5256DVP-70LLIBE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M5M5256DVP-70LLIBE requirements.
6.How does Aetrix verify that M5M5256DVP-70LLIBE is sourced from the original manufacturer or authorized distributors?
All M5M5256DVP-70LLIBE 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 M5M5256DVP-70LLIBE meets industry standards.
7.What is the process for return or replacement of M5M5256DVP-70LLIBE?
All M5M5256DVP-70LLIBE units undergo pre-shipment inspection (PSI). If there is an issue with M5M5256DVP-70LLIBE, 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 M5M5256DVP-70LLIBE part is unused and in its original packaging.
Return procedure for M5M5256DVP-70LLIBE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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