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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas 7026L20J

Name: 7026L20J
Brand: Renesas
SKU: 7026L20J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7026L20J

Manufacturer:: Renesas

Category:: Memory

Package:: 84-LCC (J-Lead)

Datasheet:: 7026L20J.pdf

Description:: IC SRAM 256KBIT PARALLEL 84PLCC

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Product details

Overview

7026L20J from IDT (Integrated Device Technology) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 20 ns maximum access time (industrial grade), 1 mW typical standby power, and full on-chip semaphore arbitration logic - used in real-time multiprocessing systems requiring concurrent CPU/DSP memory access without external logic.

For engineers reviewing the 7026L20J datasheet, 7026L20J pinout, 7026L20J application, or 7026L20J equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, byte-select control semantics, semiconductor-grade thermal performance (−40°C to +85°C), and industrial-qualified PLCC84 packaging details critical for deterministic dual-access memory design.

Technical Context

The 7026L20J implements fully asynchronous dual-port operation: each port has dedicated address (A0L–A13L / A0R–A13R), data (I/O0L–I/O15L / I/O0R–I/O15R), and control lines (CEL/CER, R/WL/R/WR, OEL/OER, UBL/UBR, LBL/LBR, SEML/SEMR, BUSYL/BUSYR). It supports both RAM array access (CE = VIL, SEM = VIH) and 8-flag semaphore register access (CE = VIH, SEM = VIL).

Its hardware arbitration uses push-pull BUSY outputs (when M/S = VIH) or BUSY inputs (M/S = VIL), with tAPS = 5 ns priority setup time and tBDD ≤ 30 ns disable-to-valid-data delay. The device enables 32-bit+ expansion via Master/Slave cascading using the M/S pin and external AND logic for BUSY aggregation.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	16,384 × 16 bits (16K × 16), two independent 16-bit ports
Access Time (tAA)	20 ns max - guarantees deterministic read latency under industrial temperature (−40°C to +85°C)
Standby Power	1 mW typ. - enables low-power hold mode during port idle periods without external power gating
Supply Voltage	5.0 V ±10% - TTL-compatible single supply; no voltage translation required
Operating Temperature	−40°C to +85°C - qualified for industrial embedded control and communications infrastructure
Package	84-pin PLCC - surface-mount compatible with standard reflow profiles and IPC-7351B land pattern
Semaphore Support	8 hardware flags addressed by A0–A2, accessed via CE=VIH/SEM=VIL - eliminates software mutex overhead in multi-core synchronization

Pinout & Package

7026L20J is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with 1.15 in × 1.15 in body size and J-lead configuration. Pin 1 is marked by a notch in the package top edge.

Pin/Terminal	Circuit Role	Design Meaning
CEL / CER	Chip Enable (Left / Right)	Active-low enable per port; controls port power-down (ISB3 = 0.2 mA typ.) and memory access
R/WL / R/WR	Read/Write Control (Left / Right)	Active-low write enable; when high, enables high-impedance output drivers during reads
OEL / OER	Output Enable (Left / Right)	Active-low tri-state control; overrides R/W state to force I/O pins into Hi-Z
UBL / UBR, LBL / LBR	Upper/Lower Byte Select	Independent 8-bit bus segmentation - supports multiplexed 16-bit data transfers and byte-level writes
SEML / SEMR	Semaphore Enable	Active-low select for semaphore register access (A0–A2 address 8 flags); disables RAM access when asserted
BUSYL / BUSYR	Busy Flag (Left / Right)	Push-pull output (M/S = VIH) or input (M/S = VIL); signals contention on same-address access; gates writes internally when LOW
M/S	Master/Slave Select	High = Master (BUSY outputs active); Low = Slave (BUSY inputs accept external stall signal)
A0L–A13L / A0R–A13R	Address Inputs	14-bit addressing per port → 16K locations; asynchronous, no clock required
I/O0L–I/O15L / I/O0R–I/O15R	Data I/O Lines	Bidirectional 16-bit data paths; support simultaneous read/write across ports to same or different addresses

Key Features

Feature	Design Value
True Dual-Port Architecture	Enables concurrent, fully asynchronous access to any memory location from two independent buses - no arbitration wait states or software overhead
Hardware Semaphore Logic	Eight dedicated flags accessible via A0–A2, eliminating need for external semaphores or polling in multi-processor interlocks
Master/Slave Cascading	Supports 32-bit+ word expansion using M/S pin and external AND gate for BUSY aggregation - no additional glue logic for depth expansion
Byte-Controlled Write Enable	UBL/LBL and UBR/LBR allow independent 8-bit writes per port - essential for mixed-endian or partial-word update applications
Industrial-Temperature Standby	1 mW typical ISB3 current at −40°C to +85°C ensures reliable low-power retention in unpowered system states

Applications

Real-Time DSP Co-Processing	Redundant Controller Memory
Use Scenario: Two DSPs share sensor data buffers and algorithm coefficients in a radar signal processor with sub-microsecond latency requirements. IC Role / Device Role / Timing Role: 7026L20J serves as shared scratchpad memory with deterministic 20 ns access and hardware BUSY arbitration to prevent race conditions during coefficient updates. Use Value: Eliminates external arbitration logic and reduces inter-processor communication latency by >3× versus software-managed SRAM sharing.	Use Scenario: Primary and backup PLC controllers maintain synchronized process state in industrial automation, requiring atomic flag exchange and mirrored memory writes. IC Role / Device Role / Timing Role: 7026L20J provides dual-port visibility into shared state variables and eight semaphore flags for failover coordination between controllers. Use Value: Enables lock-free state handoff with <5 ns semaphore update pulse (tSOP) and guaranteed atomicity without CPU intervention.
Communications Protocol Stack Buffering	Test Equipment Pattern Memory
Use Scenario: Baseband processor and protocol accelerator in 5G NR test equipment exchange packet headers and payload fragments via shared memory. IC Role / Device Role / Timing Role: 7026L20J acts as zero-copy buffer with separate left/right I/O banks, enabling concurrent header parsing (left port) and payload streaming (right port). Use Value: Sustains 50 MB/s sustained throughput using byte-select writes and avoids DMA bottlenecks through true parallel access.	Use Scenario: Automated test system stores stimulus/response patterns for high-speed digital IC validation, requiring glitch-free read/write switching during vector execution. IC Role / Device Role / Timing Role: 7026L20J functions as deterministic pattern memory with 20 ns tAA and tHZ ≤12 ns - ensuring precise timing alignment between pattern generator and comparator. Use Value: Guarantees <1 ns jitter on pattern edges via synchronous BUSY-controlled write gating and eliminates metastability in capture clocks.

Real-Time DSP Co-Processing

Redundant Controller Memory

Use Scenario: Two DSPs share sensor data buffers and algorithm coefficients in a radar signal processor with sub-microsecond latency requirements.

IC Role / Device Role / Timing Role: 7026L20J serves as shared scratchpad memory with deterministic 20 ns access and hardware BUSY arbitration to prevent race conditions during coefficient updates.

Use Value: Eliminates external arbitration logic and reduces inter-processor communication latency by >3× versus software-managed SRAM sharing.

Use Scenario: Primary and backup PLC controllers maintain synchronized process state in industrial automation, requiring atomic flag exchange and mirrored memory writes.

IC Role / Device Role / Timing Role: 7026L20J provides dual-port visibility into shared state variables and eight semaphore flags for failover coordination between controllers.

Use Value: Enables lock-free state handoff with <5 ns semaphore update pulse (tSOP) and guaranteed atomicity without CPU intervention.

Communications Protocol Stack Buffering

Test Equipment Pattern Memory

Use Scenario: Baseband processor and protocol accelerator in 5G NR test equipment exchange packet headers and payload fragments via shared memory.

IC Role / Device Role / Timing Role: 7026L20J acts as zero-copy buffer with separate left/right I/O banks, enabling concurrent header parsing (left port) and payload streaming (right port).

Use Value: Sustains 50 MB/s sustained throughput using byte-select writes and avoids DMA bottlenecks through true parallel access.

Use Scenario: Automated test system stores stimulus/response patterns for high-speed digital IC validation, requiring glitch-free read/write switching during vector execution.

IC Role / Device Role / Timing Role: 7026L20J functions as deterministic pattern memory with 20 ns tAA and tHZ ≤12 ns - ensuring precise timing alignment between pattern generator and comparator.

Use Value: Guarantees <1 ns jitter on pattern edges via synchronous BUSY-controlled write gating and eliminates metastability in capture clocks.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1362BV33-200BZI	3.3 V supply, 200 MHz (5 ns cycle), QDR interface, no built-in semaphore logic	Requires external arbitration and level-shifting for 5 V systems; optimized for high-throughput burst access, not true asynchronous dual-port	Select only if migrating to 3.3 V architecture and adding FPGA-based semaphore management.
IDT70V26S20PF	3.3 V core, 20 ns access, 84-pin TQFP, lower standby current (0.5 µA), no industrial temp rating	Lacks −40°C to +85°C qualification; requires voltage translation for legacy 5 V bus interfaces	Prefer for new 3.3 V designs where extended temperature range is not required and PCB space favors TQFP over PLCC.

Compared with CY7C1362BV33-200BZI and IDT70V26S20PF, the 7026L20J uniquely delivers 5 V TTL compatibility, industrial temperature support, integrated semaphore registers, and true asynchronous dual-port operation - making it irreplaceable in legacy industrial control and military-grade multiprocessing systems where deterministic latency and hardware coherency are non-negotiable.

Availability

7026L20J is available at Aetrix Electronics and suitable for real-time DSP co-processing, redundant controller memory, communications protocol stack buffering, and test equipment pattern memory requiring stable component supply across long-lifecycle industrial programs.

Supply support for 7026L20J 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) was a fabless semiconductor company specializing in high-performance memory, timing, and interface solutions before its acquisition by Renesas Electronics in 2019.

The IDT7026 family was designed specifically for deterministic, low-latency multiprocessing systems - delivering hardware-enforced memory coherency and semaphore synchronization without software or external logic overhead.

FAQ

What is the maximum operating temperature range certified for the 7026L20J?

The 7026L20J is rated for industrial temperature operation from −40°C to +85°C. This specification is production-tested and documented in the Absolute Maximum Ratings table of the official IDT datasheet DSC2939/17. It does not support military-grade (−55°C to +125°C) or extended commercial (0°C to +70°C only) ranges - the "L" suffix explicitly denotes the industrial-temperature variant.

Does the 7026L20J require external pull-up resistors on BUSYL and BUSYR pins?

No, the 7026L20J does not require external pull-up resistors on BUSYL or BUSYR. When configured as a master (M/S = VIH), both pins are push-pull outputs capable of driving TTL loads directly. The datasheet explicitly states "BUSY outputs are non-tri-stated push-pull" and confirms internal drive strength sufficient for standard logic interfacing without external biasing.

How many semaphore flags does the 7026L20J provide, and how are they accessed?

The 7026L20J provides eight hardware semaphore flags. They are accessed by setting CE = VIH and SEM = VIL, then using address lines A0–A2 to select one of the eight flags. Data is written via I/O0 and read back across all 16 I/O lines (I/O0–I/O15). This mechanism is confirmed in Truth Table II and Functional Description section of the DSC2939/17 datasheet.

Can the 7026L20J be used in a 32-bit memory system? If so, how?

Yes, the 7026L20J supports 32-bit expansion via Master/Slave cascading. Two devices are connected with M/S = VIH (master) and M/S = VIL (slave); BUSY outputs are ANDed externally to generate a unified busy signal. The IDT7026 datasheet confirms this topology enables "full-speed, error-free operation without additional discrete logic" for 32-bit-or-more word systems.

What is the standby current consumption of the 7026L20J under full CMOS input conditions?

Under full CMOS input conditions (all inputs at VCC − 0.2 V or GND, f = 0), the 7026L20J exhibits ISB3 = 0.2 mA typical and 5 mA maximum standby current for both ports disabled. This value is specified in Table 10 of the DSC2939/17 datasheet and reflects the lowest achievable quiescent power state for industrial-temperature operation.

7026L20J 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:: 20ns

Access Time:: 20 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)

7026L20J FAQ

1.How can I place an order for 7026L20J through Aetrix?

Please submit a Request for Quotation (RFQ) for 7026L20J 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 7026L20J reliable?

The price and inventory of 7026L20J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7026L20J is usually 5 days.

3.What payment methods are accepted for 7026L20J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7026L20J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7026L20J?

7026L20J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7026L20J 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 7026L20J?

For technical support, including 7026L20J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7026L20J requirements.

6.How does Aetrix verify that 7026L20J is sourced from the original manufacturer or authorized distributors?

All 7026L20J 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 7026L20J meets industry standards.

7.What is the process for return or replacement of 7026L20J?

All 7026L20J units undergo pre-shipment inspection (PSI). If there is an issue with 7026L20J, 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 7026L20J part is unused and in its original packaging.

Return procedure for 7026L20J:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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