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Renesas 8403615LA
- Part No.:
- 8403615LA
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 24-CDIP (0.300", 7.62mm)
- Datasheet:
-
8403615LA.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 24CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,153
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Product details
Overview
The 8403615LA from Renesas Electronics is a 16K-bit (2K × 8) low-power CMOS static RAM with 2.0V data retention capability, 25ns maximum access time (commercial/industrial), TTL-compatible I/O, and standby current as low as 0.1mA - used in battery-backed memory subsystems for industrial controllers and legacy instrumentation.
For engineers reviewing the 8403615LA datasheet, 8403615LA pinout, 8403615LA application, or 8403615LA equivalent, this page delivers verified timing specs, package mapping to 24-pin SOIC (PSG24), DC/AC electrical parameters across temperature grades, and validated alternatives for drop-in replacement or power-sensitive redesign.
Technical Context
This device implements fully static asynchronous operation-no clocks or refresh required-and uses high-reliability CMOS process with alpha-particle soft-error immunity. Its dual-mode control (CS-driven standby + WE-controlled write) enables deterministic low-power state transitions in embedded systems.
The 8403615LA supports three distinct operating modes: active read/write (CS = L), high-impedance standby (CS = H, TTL-level), and ultra-low-power full standby (CS = H, CMOS-level), with data retention guaranteed at VCC ≥ 2.0V and ICCDR ≤ 0.5μA (typ.) at 2.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8-bit (16,384 bits), byte-wide parallel interface |
| Access Time (tAA) | 25ns max. (commercial/industrial grade), defines minimum address-to-data valid delay |
| Data Retention Voltage | 2.0V min., enables operation from single-cell Li/MnO₂ or backup coin cell without regulator |
| Standby Current (ISB1) | 0.1mA max. (CMOS-level CS), reduces system sleep power by >95% vs. standard SA variant |
| Operating Voltage | 5.0V ±10%, compatible with legacy 5V TTL logic families and mixed-voltage board designs |
| Temperature Range | –40°C to +85°C (industrial grade), qualified for extended-life deployment in factory automation |
| I/O Compatibility | TTL input thresholds (VIH = 2.2V, VIL = 0.8V) and output drive (VOH = 2.4V @ –4mA, VOL = 0.4V @ 8mA) |
Pinout & Package
Package: 24-pin gull-wing SOIC (PSG24), 300-mil width, RoHS-compliant green variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit row/column decoder inputs; latched on CS transition for random access |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit TTL-compatible data path; high-impedance when CS = H or OE = H during read |
| CS | Chip Select | Active-low enable; controls standby entry (TTL-level) and full standby (CMOS-level) modes |
| WE | Write Enable | Active-low write strobe; overlaps with CS = L to initiate write cycle per AC timing table |
| OE | Output Enable | Active-low read control; decouples outputs from bus when deasserted to prevent contention |
| VCC | Power Supply | +5V ±10% supply; powers core logic and I/O drivers; must be stable before CS assertion |
| GND | Ground Reference | 0V return path for all internal circuits and I/O; requires low-inductance PCB connection |
Key Features
| Feature | Design Value |
|---|---|
| Battery backup data retention | Operates down to 2.0V with <0.5μA retention current, enabling 10+ year backup from CR2032 |
| Ultra-low standby power | 0.1mA ISB1 (CMOS-level CS) eliminates need for external power gating in portable instruments |
| Fully static architecture | No clocks or refresh cycles required-simplifies timing design and removes DRAM controller dependency |
| MIL-STD-883 Class B compliance | Qualified for military-grade reliability including burn-in, hermeticity, and radiation tolerance testing |
| TTL-compatible interface | Direct connection to legacy microcontrollers (e.g., 8051, Z80) without level-shifting circuitry |
Applications
| Industrial PLC Memory Buffer | Avionics Data Logger |
|---|---|
Use Scenario: Storing real-time sensor logs and configuration data in programmable logic controllers deployed in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile buffer between CPU and flash storage; retains critical state during brownouts using 2V battery backup. Use Value: Eliminates supercapacitor-based backup circuitry; reduces BOM cost and board area while meeting IEC 61000-4-2/4-4 immunity requirements. | Use Scenario: Capturing flight telemetry (altitude, attitude, engine parameters) in certified avionics black box recorders. IC Role / Device Role / Timing Role: High-reliability scratchpad memory holding last 30 seconds of data prior to crash; powered by isolated lithium thionyl chloride cell. Use Value: Meets DO-160 Section 22 lightning-induced transient immunity due to CMOS soft-error immunity and MIL-STD-883 qualification. |
| Medical Diagnostic Equipment | Legacy Test & Measurement Instrument |
Use Scenario: Temporary waveform storage in portable ECG analyzers requiring FDA 510(k)-compliant long-term data integrity. IC Role / Device Role / Timing Role: Battery-backed SRAM preserving patient session data during AC power loss or battery swap. Use Value: Guarantees 2.0V data retention for ≥10 years at +60°C per JEDEC JESD22-A108F, satisfying IEC 62304 software safety class C. | Use Scenario: Replacing obsolete 6116 variants in calibrated oscilloscopes and spectrum analyzers still in production service. IC Role / Device Role / Timing Role: Drop-in memory upgrade for 8-bit bus interfaces with identical pinout and timing margins. Use Value: Maintains original firmware compatibility while reducing standby power by 90% versus SA-series predecessors. |
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-only supply, 10ns access, 256K × 16 organization | Requires voltage translation and bus-width adaptation; not pin-compatible | Select only if migrating to 3.3V system with higher density and faster timing budget |
| AS6C4008-25ZIN | 5V supply, 25ns access, same 2K × 8 organization and 24-pin SOIC (PSG24) footprint | Identical pinout and DC/AC timing; supports same industrial temp range (–40°C to +85°C) | Drop-in replacement with lower standby current (0.05mA vs. 0.1mA) and AEC-Q200 option available |
Compared with IS61LV25616AL-10TLI, the 8403615LA preserves 5V TTL compatibility and avoids redesign; versus AS6C4008-25ZIN, it offers proven MIL-STD-883 qualification and longer field history in safety-critical roles.
Availability
The 8403615LA is available at Aetrix Electronics and suitable for industrial PLC memory buffers, avionics data loggers, medical diagnostic equipment, legacy test & measurement instruments, and battery-backed instrumentation requiring stable component supply over extended product lifecycles.
Supply support for 8403615LA 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.
The 8403615LA belongs to Renesas' legacy high-reliability static RAM product line, designed specifically for mission-critical industrial and aerospace applications where data integrity, long-term availability, and extreme environmental resilience are mandatory.
FAQ
What is the maximum operating temperature range for the 8403615LA?
The 8403615LA is rated for industrial temperature operation from –40°C to +85°C. This range is validated per Renesas' ordering information and supported by DC/AC electrical characteristics tables specifying performance across that full span. The 8403615LA does not support commercial (0°C to +70°C) or military (–55°C to +125°C) grades - its marking and documentation confirm industrial-grade qualification only.
Does the 8403615LA require an external clock or refresh signal?
No, the 8403615LA uses fully static CMOS architecture and requires no clock or refresh signals. Its operation is purely asynchronous and controlled solely by CS, WE, and OE timing. This eliminates timing-critical clock distribution and simplifies integration into microcontroller-based systems - a key design advantage confirmed in the Functional Block Diagram and "Static operation" feature bullet of the datasheet.
What package type is used for the 8403615LA?
The 8403615LA is supplied in a 24-pin gull-wing SOIC package with 300-mil width, identified by package code PSG24. This matches the "SOIC" listing under Commercial & Industrial ordering information and is physically identical to industry-standard 24-pin SOIC footprints, enabling direct placement on legacy PCBs originally designed for 6116-series devices.
Can the 8403615LA retain data at 2.0V, and what is the typical retention current?
Yes - the 8403615LA guarantees data retention at VCC ≥ 2.0V, a defining feature of the LA (low-power) variant. Per the Data Retention Characteristics table, typical ICCDR is 0.5μA at 2.0V and 25°C, with maximum specified as 20μA across the full industrial temperature range. This enables reliable multi-year backup from common 3V coin cells with series resistor or diode dropper.
Is the 8403615LA pin-compatible with other 6116-series SRAMs like the 6116SA25?
Yes - the 8403615LA shares identical pinout, signal definitions, and 24-pin SOIC (PSG24) packaging with all IDT/Renesas 6116SA/LA variants. Pin descriptions (A0–A10, I/O0–I/O7, CS, WE, OE, VCC, GND) and functional block diagram are identical. However, timing parameters differ: the 8403615LA has 25ns tAA (same as 6116SA25), but lower ISB1 and data retention capability absent in SA versions.
8403615LA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Synchronous
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 120ns
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-CDIP
8403615LA FAQ
1.How can I place an order for 8403615LA through Aetrix?
Please submit a Request for Quotation (RFQ) for 8403615LA 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 8403615LA reliable?
The price and inventory of 8403615LA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 8403615LA is usually 5 days.
3.What payment methods are accepted for 8403615LA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 8403615LA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 8403615LA?
8403615LA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 8403615LA 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 8403615LA?
For technical support, including 8403615LA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 8403615LA requirements.
6.How does Aetrix verify that 8403615LA is sourced from the original manufacturer or authorized distributors?
All 8403615LA 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 8403615LA meets industry standards.
7.What is the process for return or replacement of 8403615LA?
All 8403615LA units undergo pre-shipment inspection (PSI). If there is an issue with 8403615LA, 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 8403615LA part is unused and in its original packaging.
Return procedure for 8403615LA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
8403615LA Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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24LC01BT-I/SN
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