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Renesas 7026S15J
- Part No.:
- 7026S15J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7026S15J.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
IDT7026S15J from IDT (Integrated Device Technology) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 15 ns max read cycle time (commercial grade), TTL-compatible 5V ±10% operation, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to the same memory location and supports master/slave cascading for 32-bit+ bus expansion in real-time embedded control systems.
For engineers reviewing the IDT7026S15J datasheet, IDT7026S15J pinout, IDT7026S15J application, or IDT7026S15J equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤15 ns), dual-port power-down via CE (ISB3 ≤1.0 mA), 84-pin PLCC package compatibility, and industrial-temperature-ready variants (e.g., IDT7026S20J).
Technical Context
The IDT7026S15J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - no shared clock or synchronization required. Its on-chip arbitration logic resolves contention via BUSY flag assertion (push-pull output) when both ports access identical addresses, with priority determined by tAPS (5 ns setup) and tBDD (≤18 ns disable-to-valid-data delay).
It integrates full hardware semaphore support: eight flags addressed by A0–A2, accessed via SEM = VIL and CE = VIH, enabling inter-processor coordination without external logic. Byte-select (UBL/LBL, UBR/LBR) and master/slave (M/S) configuration allow flexible data-width scaling and hierarchical memory system design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16,384 × 16 bits (256 KB total); supports independent 16-bit reads/writes on each port |
| Access Time | 15 ns max (tAA, tACE, tABE); enables 66.7 MHz sustained random access in commercial applications |
| Supply Voltage | 5.0 V ±10%; operates across full TTL logic voltage range without level-shifting |
| Standby Current | 1.0 mA typical (ISB3, full CMOS standby); reduces system power during idle port cycles |
| Operating Temp | 0°C to +70°C (commercial grade); validated for stable timing across ambient range |
| Package | 84-pin PLCC (plastic leaded chip carrier); 1.15″ × 1.15″ footprint compatible with standard surface-mount reflow |
| BUSY Timing | tBAA ≤15 ns; ensures rapid contention detection for deterministic real-time response |
Pinout & Package
Package: 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈1.15 in × 1.15 in × 0.17 in. Pin 1 index located at corner near notch; all VCC pins require local decoupling, all GND pins must be connected to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A13L | Left port address inputs | 14-bit address bus for 16K-word left-side access; latched on CE transition |
| A0R–A13R | Right port address inputs | Independent 14-bit address bus; enables concurrent addressing of same or different locations |
| I/O0L–I/O15L | Left port bidirectional data | 16-bit data path; byte-selectable via UBL/LBL for multiplexed bus interfacing |
| I/O0R–I/O15R | Right port bidirectional data | Fully independent data path; supports simultaneous read/write without bus contention |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; drives internal power-down when high (VIH) |
| R/WL / R/WR | Read/write control (left/right) | Active-low write enable; high = read, low = write; controls direction of I/O drivers |
| OEL / OER | Output enable (left/right) | Active-low enables data outputs; allows high-Z state during writes or bus sharing |
| UBL / UBR | Upper-byte select (left/right) | Enables I/O8–I/O15 only; supports 8-bit microprocessor interface compatibility |
| LBL / LBR | Lower-byte select (left/right) | Enables I/O0–I/O7 only; permits partial-word transfers without full 16-bit bus usage |
| SEML / SEMR | Semaphore enable (left/right) | Active-low enables semaphore register access (A0–A2 address space) instead of RAM array |
| BUSYL / BUSYR | Busy flag (left/right) | Push-pull output (master mode) or input (slave mode); signals address collision or blocks write |
| M/S | Master/slave select | High = BUSY outputs active; low = BUSY inputs that inhibit writes on corresponding port |
| VCC | Power supply | Eight dedicated 5V pins; requires distributed 0.1 µF ceramic decoupling per VCC–GND pair |
| GND | Ground | Twelve ground pins; essential for noise immunity and thermal dissipation in high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous read/write to identical addresses - no internal arbitration delay or data corruption |
| On-chip semaphore logic | Eight hardware flags (A0–A2 addressable) eliminate need for external semaphores in multi-CPU systems |
| Master/slave cascading | M/S pin configures device as master (BUSY output) or slave (BUSY input), enabling 32-bit+ word expansion without glue logic |
| Byte-selectable I/O | UBL/LBL and UBR/LBR allow independent 8-bit access per port - critical for legacy 8-bit processor coexistence |
| Automatic power-down | CE-driven standby reduces active port current to ≤1.0 mA (ISB3), extending battery life in portable systems |
Applications
| Real-Time Industrial PLC | Dual-Core DSP Memory Bridge |
|---|---|
Use Scenario: Two independent CPU cores (e.g., ARM Cortex-M7 + RISC-V) share sensor data and control state in a programmable logic controller. IC Role / Device Role / Timing Role: IDT7026S15J serves as non-blocking shared memory with hardware semaphore coordination between cores. Use Value: Eliminates software mutex overhead; 15 ns access ensures sub-microsecond inter-core communication latency. | Use Scenario: A digital signal processor and host microcontroller exchange FFT coefficients and filter parameters in audio processing equipment. IC Role / Device Role / Timing Role: IDT7026S15J acts as a synchronous buffer with independent read/write ports and BUSY arbitration for conflict-free updates. Use Value: Prevents data corruption during concurrent access; byte-select capability matches 8-bit peripheral interfaces on both sides. |
| Avionics Data Acquisition System | Test Equipment Pattern Memory |
Use Scenario: Flight control computer and health monitoring unit concurrently log telemetry and update actuator commands in safety-critical avionics. IC Role / Device Role / Timing Role: IDT7026S15J provides deterministic memory access with hardware-enforced priority via BUSY flag and tAPS timing. Use Value: Guarantees worst-case 15 ns contention resolution - meets DO-254 timing assurance requirements. | Use Scenario: Automated test equipment stores stimulus/response patterns for semiconductor wafer probing, requiring rapid parallel access. IC Role / Device Role / Timing Role: IDT7026S15J functions as high-speed pattern RAM with simultaneous pattern generation (right port) and analysis (left port). Use Value: 15 ns access enables >66 MHz pattern rates; on-chip arbitration prevents race conditions during self-test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV18 | 18-bit data width, 2.5V core / 3.3V I/O, QDR-II+ interface; no native BUSY arbitration | Targets high-speed networking buffers; requires external logic for contention management | Select when migrating to lower-voltage systems and external arbitration is acceptable |
| IDT70V26S15PF | Same 16K×16 architecture but 3.3V supply, TQFP-100 package; 15 ns speed grade retained | Designed for modern low-power embedded platforms; incompatible pinout and voltage domain | Choose for new designs requiring 3.3V compatibility and higher I/O density |
Compared with CY7C1362BV18 and IDT70V26S15PF, the IDT7026S15J uniquely delivers 5V TTL compatibility, integrated push-pull BUSY signaling, and PLCC packaging - making it irreplaceable in legacy industrial and avionics upgrades where voltage, timing, and mechanical fit are constrained.
Availability
IDT7026S15J is available at Aetrix Electronics and suitable for real-time industrial PLCs, avionics data acquisition systems, and dual-core DSP memory bridges requiring stable component supply across extended product lifecycles.
Supply support for IDT7026S15J 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
IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.
The IDT7026S15J belongs to the 7000-series dual-port SRAM family, engineered for deterministic real-time systems where simultaneous memory access, hardware arbitration, and industrial temperature reliability are mandatory.
FAQ
What is the maximum operating frequency supported by the IDT7026S15J?
The IDT7026S15J has a 15 ns maximum read cycle time (tRC), supporting up to 66.7 MHz random access operation under commercial conditions. This is not a clocked device - its fully asynchronous design means timing depends on individual parameter limits (e.g., tAA ≤15 ns, tACE ≤15 ns), not a global clock frequency. Sustained throughput assumes proper address/control setup and hold times per the AC specifications table.
Does the IDT7026S15J require external pull-up resistors on BUSY pins?
No, the IDT7026S15J BUSYL and BUSYR pins are push-pull outputs in master mode (M/S = H) and do not require external pull-up resistors. When configured as a slave (M/S = L), BUSY pins become inputs and must be driven externally - typically tied HIGH for normal operation or LOW to inhibit writes. The datasheet explicitly states these are non-tri-stated push-pull outputs.
How does semaphore functionality work on the IDT7026S15J?
The IDT7026S15J implements eight hardware semaphore flags accessible via A0–A2 address lines when CE = VIH and SEM = VIL. Writing "0" to I/O0 sets a flag; reading returns the flag state across all 16 I/O lines. Semaphores coordinate access between ports or processors - e.g., writing "0" grants token ownership, writing "1" releases it. No external logic or software polling is needed.
Can the IDT7026S15J be used in industrial temperature applications?
The IDT7026S15J is rated for commercial temperature (0°C to +70°C). For industrial operation (–40°C to +85°C), the functionally identical IDT7026S20J (20 ns speed grade) is specified and qualified. While some units may operate outside spec, IDT does not guarantee timing or reliability of the IDT7026S15J beyond its commercial range - use IDT7026S20J for guaranteed industrial performance.
What package type is used for the IDT7026S15J?
The IDT7026S15J uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package with dimensions approximately 1.15 inches × 1.15 inches × 0.17 inches. Pin 1 is located at the corner adjacent to the package notch. This package is RoHS-compliant and supports standard infrared reflow soldering profiles.
7026S15J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 256Kbit
- Memory Organization:
- 16K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
7026S15J FAQ
1.How can I place an order for 7026S15J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7026S15J 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 7026S15J reliable?
The price and inventory of 7026S15J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7026S15J is usually 5 days.
3.What payment methods are accepted for 7026S15J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7026S15J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7026S15J?
7026S15J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7026S15J 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 7026S15J?
For technical support, including 7026S15J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7026S15J requirements.
6.How does Aetrix verify that 7026S15J is sourced from the original manufacturer or authorized distributors?
All 7026S15J 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 7026S15J meets industry standards.
7.What is the process for return or replacement of 7026S15J?
All 7026S15J units undergo pre-shipment inspection (PSI). If there is an issue with 7026S15J, 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 7026S15J part is unused and in its original packaging.
Return procedure for 7026S15J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7026S15J Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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