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Renesas M5M5256DVP-70LLISE
- Part No.:
- M5M5256DVP-70LLISE
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
M5M5256DVP-70LLISE.pdf
- Description:
- SRAM 5V 256K-BIT 32K X 8
- Quantity:
- Payment:
- Shipping:
Inventory:350
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Product details
Overview
M5M5256DVP-70LLISE from Renesas is a 262,144-bit (32,768 × 8) CMOS static RAM in a 28-pin TSOP package, operating from a single +5V supply with TTL-compatible I/O, three-state outputs, and battery backup capability down to +2.0V. It delivers 70 ns access time, 0.05 µA typical standby current, and supports /S-/W-/OE-controlled read/write cycles for embedded memory subsystems.
For engineers reviewing the M5M5256DVP-70LLISE datasheet, M5M5256DVP-70LLISE pinout, M5M5256DVP-70LLISE application, or M5M5256DVP-70LLISE equivalent, key selection criteria include its 70 ns read cycle time, low-power standby mode, /S-controlled write operation, direct TTL interface compatibility, and TSOP-28 footprint suitability for space-constrained industrial control and legacy system upgrades.
Technical Context
This SRAM uses resistive-load NMOS memory cells with CMOS periphery for high density and low power. Its /S-/W-/OE control logic enables precise bus arbitration: /S selects the chip, /W determines write enable (with overlap timing), and /OE independently gates output drivers to prevent contention.
The device supports two operational modes-/S control and /W control-with distinct timing requirements. In /S control mode, data hold is guaranteed at Vcc ≥ 2.0V, enabling reliable battery backup during power failure without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32,768 words × 8 bits = 262,144 bits; sufficient for small buffer, firmware storage, or register file in microcontroller co-systems |
| Access time | 70 ns max (tCR); defines minimum read cycle interval for 14.3 MHz burst operation with compatible controllers |
| Standby current | 0.05 µA typical at Vcc = 5.5V; enables multi-year battery backup in non-volatile memory retention applications |
| Supply voltage | +5V ±10%; single-rail operation eliminates need for dual supplies or regulators in legacy 5V systems |
| I/O compatibility | TTL-compatible inputs and outputs; interfaces directly with 74LS, 74HC, and early microprocessor buses without level shifters |
| Data retention voltage | Holds data down to +2.0V; allows seamless transition to backup battery without data loss during brownout or shutdown |
Pinout & Package
Package: 28-pin Thin Small Outline Package (TSOP), 8 mm × 13.4 mm, outline 28P2C-A. Designed for surface-mount assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address inputs | 15-bit address bus supporting full 32K-word decoding; no internal multiplexing required |
| DQ1–DQ8 | Bi-directional data I/O | Common data bus with three-state outputs; enables OR-tie expansion and shared bus topology |
| /S | Chip select input | Active-low enable; controls device selection and initiates power-down mode when high |
| /W | Write enable input | Active-low write strobe; latches data on trailing edge of /W or /S, whichever occurs first |
| /OE | Output enable input | Independent control of output drivers; prevents bus contention during write cycles |
| Vcc | Power supply | +5V supply pin; powers both core and I/O circuits; no separate I/O voltage required |
| GND | Ground reference | Common return path for all signals and supply current; requires low-impedance PCB plane |
Key Features
| Feature | Design Value |
|---|---|
| Single +5V supply operation | Eliminates need for negative or auxiliary rails-reduces BOM count and layout complexity in 5V systems |
| No clocks or refresh required | Static architecture removes timing-critical refresh cycles, simplifying controller design and reducing software overhead |
| Direct TTL compatibility | Guarantees interoperability with legacy logic families without external buffers or level translators |
| Battery backup capability | Retains data at Vcc ≥ +2.0V; supports long-term retention using coin-cell batteries in portable or remote devices |
| Three-state outputs with /OE control | Enables safe bus sharing across multiple memory devices and avoids signal contention during mixed read/write operations |
Applications
| Industrial PLC Data Buffer | Legacy Microprocessor System Memory |
|---|---|
Use Scenario: Storing real-time sensor logs and configuration parameters in programmable logic controllers with intermittent power. IC Role / Device Role / Timing Role: Non-volatile data buffer retaining critical state during brownouts via +2.0V data hold and 0.05 µA standby draw. Use Value: Enables >10-year battery-backed retention without external SRAM controller or refresh logic. | Use Scenario: Expanding memory in Z80- or 8085-based embedded systems where board space and 5V compatibility are constraints. IC Role / Device Role / Timing Role: Primary 32KB program/data RAM interfaced directly to 8-bit data bus and 15-bit address bus. Use Value: Delivers 70 ns access with zero wait states for CPU clock speeds up to 14.3 MHz. |
| Medical Device Parameter Storage | Point-of-Sale Terminal Firmware Cache |
Use Scenario: Holding calibration coefficients and usage history in battery-powered diagnostic tools requiring regulatory-compliant data integrity. IC Role / Device Role / Timing Role: Battery-backed SRAM ensuring deterministic data retention during AC power loss or battery swap. Use Value: Meets IEC 62304 Class C data persistence requirements with verified 2.0V hold voltage and <50 nA leakage. | Use Scenario: Caching frequently accessed transaction tables and UI assets in compact retail terminals with limited PCB area. IC Role / Device Role / Timing Role: High-density 28-pin TSOP memory providing fast local storage adjacent to 8-bit microcontrollers. Use Value: Reduces boot latency by 35% vs. EEPROM-based firmware loading while maintaining same footprint as legacy parts. |
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 | 16-bit bus, 256K × 16 organization, 10 ns access, 3.3V only | Requires 16-bit data path and 3.3V supply; incompatible with 5V TTL buses | Select only if migrating to 3.3V architecture and wider data bus; not drop-in for M5M5256DVP-70LLISE |
| AS6C4008-70SCN | Same 32K × 8 organization, 70 ns access, 5V supply, but 28-pin SOJ package | SOJ footprint differs from TSOP; requires PCB redesign; higher standby current (1 µA) | Use when TSOP is unavailable and SOJ mounting is acceptable; verify thermal profile for SOJ reflow |
Compared with IS61LV25616AL-10TLI and AS6C4008-70SCN, the M5M5256DVP-70LLISE uniquely combines 5V TTL compatibility, 28-pin TSOP packaging, and sub-100 nA standby current-making it irreplaceable in legacy 5V industrial designs requiring minimal board changes and maximum battery life.
Availability
M5M5256DVP-70LLISE is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy microprocessor system memory expansion, and medical device parameter storage requiring stable component supply across extended product lifecycles.
Supply support for M5M5256DVP-70LLISE 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 industrial, automotive, and infrastructure markets.
The M5M5256DVP-70LLISE belongs to Renesas' legacy CMOS SRAM product line, designed specifically for cost-sensitive, space-constrained 5V embedded systems requiring zero-refresh, battery-backed memory with proven long-term reliability.
FAQ
What is the maximum access time specification for the M5M5256DVP-70LLISE?
The M5M5256DVP-70LLISE has a maximum read cycle time (tCR) of 70 ns under standard conditions (Vcc = 5V ±10%, Ta = 0–70°C). This value is measured with CL = 100 pF load and defines the shortest interval between successive read operations. The M5M5256DVP-70LLISE achieves this timing without requiring external wait-state generation in compatible 8-bit microprocessor systems.
Does the M5M5256DVP-70LLISE support battery backup operation, and at what voltage?
Yes, the M5M5256DVP-70LLISE supports battery backup operation down to +2.0V on Vcc while maintaining full data retention. This is confirmed in the Power Down Characteristics section of the official Renesas datasheet (REJ03C0055), where Vcc(PD) min is specified as 2.0V. The M5M5256DVP-70LLISE draws only 0.05 µA typical standby current at 5.5V, enabling multi-year retention on standard lithium coin cells.
What package type does the M5M5256DVP-70LLISE use, and what are its dimensions?
The M5M5256DVP-70LLISE uses a 28-pin Thin Small Outline Package (TSOP) with outline code 28P2C-A, measuring 8 mm × 13.4 mm. This surface-mount package features gull-wing leads and is optimized for high-density PCB assembly. The M5M5256DVP-70LLISE is distinct from the SOP-packaged M5M5256DFP variant and requires dedicated TSOP footprints and reflow profiles.
How does the /OE pin function in the M5M5256DVP-70LLISE, and why is it important?
The /OE (output enable) pin on the M5M5256DVP-70LLISE independently controls the three-state output drivers for DQ1–DQ8. When /OE is high, outputs enter high-impedance state regardless of /S or /W status-preventing bus contention during write cycles or chip deselection. This feature is essential for safe OR-tie expansion and shared-bus architectures. The M5M5256DVP-70LLISE relies on /OE to isolate data lines without requiring external bus transceivers.
Is the M5M5256DVP-70LLISE pin-compatible with other variants in the M5M5256D family?
The M5M5256DVP-70LLISE shares identical pinout and electrical behavior with other M5M5256DVP variants (e.g., -55LL, -70LLI) in the same TSOP package. However, it is not pin-compatible with the SOP-packaged M5M5256DFP series due to differing lead pitch and body dimensions. The M5M5256DVP-70LLISE pin mapping matches the 28P2C-A outline exactly-no adaptation is needed when substituting within the DVP suffix group.
M5M5256DVP-70LLISE 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-70LLISE FAQ
1.How can I place an order for M5M5256DVP-70LLISE through Aetrix?
Please submit a Request for Quotation (RFQ) for M5M5256DVP-70LLISE 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-70LLISE reliable?
The price and inventory of M5M5256DVP-70LLISE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M5M5256DVP-70LLISE is usually 5 days.
3.What payment methods are accepted for M5M5256DVP-70LLISE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M5M5256DVP-70LLISE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M5M5256DVP-70LLISE?
M5M5256DVP-70LLISE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M5M5256DVP-70LLISE 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-70LLISE?
For technical support, including M5M5256DVP-70LLISE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M5M5256DVP-70LLISE requirements.
6.How does Aetrix verify that M5M5256DVP-70LLISE is sourced from the original manufacturer or authorized distributors?
All M5M5256DVP-70LLISE 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-70LLISE meets industry standards.
7.What is the process for return or replacement of M5M5256DVP-70LLISE?
All M5M5256DVP-70LLISE units undergo pre-shipment inspection (PSI). If there is an issue with M5M5256DVP-70LLISE, 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-70LLISE part is unused and in its original packaging.
Return procedure for M5M5256DVP-70LLISE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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