My Inquiry
My Account
Renesas 7026S35J
- Part No.:
- 7026S35J
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
7026S35J.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,608
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT7026S35J from IDT (Integrated Device Technology) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 35 ns maximum read cycle time, TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to the same memory location in real-time inter-processor communication systems.
For engineers reviewing the IDT7026S35J datasheet, IDT7026S35J pinout, IDT7026S35J application, or IDT7026S35J equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤35 ns), dual-byte control (UBL/LBL), master/slave cascading capability via M/S pin, and industrial temperature support (–40°C to +85°C).
Technical Context
The IDT7026S35J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - enabling concurrent read/write operations without external logic. Its on-chip arbitration uses push-pull BUSY outputs (BUSYL/BUSYR) and hardware semaphore flags (A0–A2 addressed, I/O0 write, all I/Os read).
It supports two operational modes: MASTER (BUSY as output, tBAA ≤20 ns) and SLAVE (BUSY as input, tWB = 0 ns), with automatic write inhibition when BUSY is asserted. The device uses CMOS process for low-power operation: 750 mW typical active power and 5 mW typical standby power at 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 16K × 16 bits (256Kb total); supports 32-bit+ expansion via MASTER/SLAVE cascading |
| Access Time (tAA) | 35 ns max - defines minimum address hold before valid data appears on I/O |
| Read Cycle Time (tRC) | 35 ns max - sets maximum sustained read throughput (28.6 MHz) |
| Supply Voltage | 5.0 V ±10% - TTL-compatible; no level-shifting required in legacy 5V systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Power Consumption | 750 mW active (typ), 5 mW standby (typ) - enables low-heat, fanless embedded designs |
| Package | 84-pin PLCC - surface-mount compatible with standard reflow profiles and IPC-7351 footprints |
Pinout & Package
84-pin Plastic Leaded Chip Carrier (PLCC), 1.15 in × 1.15 in body, JEDEC MS-018AC compliant. Pin 1 marked by corner notch; top view shown in datasheet Figure 2939 drw 02.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A13L | Left port address inputs | 14-bit address bus for 16K-word left-side access; independent of right port |
| A0R–A13R | Right port address inputs | 14-bit address bus for right-side access; no shared address lines with left port |
| I/O0L–I/O15L | Left port bidirectional data | 16-bit data path; upper/lower byte controlled separately by UBL/LBL |
| I/O0R–I/O15R | Right port bidirectional data | 16-bit data path; supports independent byte writes without read-modify-write |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; drives internal power-down when high |
| R/WL / R/WR | Read/write control (left/right) | Active-low write enable; high = read; no internal latching - fully asynchronous |
| OEL / OER | Output enable (left/right) | Active-low controls I/O drivers; allows tristate during bus sharing or arbitration |
| UBL / LBL | Upper/lower byte select (left) | Enables 8-bit granularity writes to left port; essential for mixed-width bus interfacing |
| UBR / LBR | Upper/lower byte select (right) | Enables 8-bit granularity writes to right port; supports partial-word updates |
| SEML / SEMR | Semaphore enable (left/right) | Active-low enables access to 8 semaphore flags (A0–A2 addressable) for inter-processor sync |
| BUSYL / BUSYR | Busy flag (left/right) | Push-pull outputs in MASTER mode; inputs in SLAVE mode - no pull-ups required |
| M/S | Master/Slave select | High = MASTER (BUSY outputs); Low = SLAVE (BUSY inputs); determines arbitration role |
| VCC / GND | Power and ground | Multiple VCC/GND pins distributed for low-noise operation; all must be connected |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous read/write to identical addresses - eliminates software locks in real-time IPC |
| Hardware semaphore logic | Eight dedicated flags (A0–A2) accessed via I/O0 write/all-I/O read - reduces CPU overhead in multi-core sync |
| On-chip arbitration with BUSY signaling | Push-pull BUSY outputs respond within 20 ns (tBAA) - enables deterministic stall recovery without glue logic |
| Separate upper/lower byte control | UBL/LBL and UBR/LBR allow independent 8-bit writes - avoids full 16-bit bus contention in mixed-data systems |
| MASTER/SLAVE cascading | M/S pin configures device as master (arbitrator) or slave (controlled unit) - scales to 32-bit+ word widths |
Applications
| Real-Time Inter-Processor Communication | Digital Signal Processor (DSP) Co-Processing |
|---|---|
|
Use Scenario: Two microcontrollers exchange sensor fusion data and control commands with zero-latency memory sharing. IC Role / Device Role / Timing Role: Dual-port RAM acts as shared mailbox; left port serves MCU-A, right port serves MCU-B; BUSY signals coordinate conflict-free access. Use Value: Eliminates polling or interrupt-driven handshaking; 35 ns access enables sub-microsecond inter-core messaging. |
Use Scenario: A DSP offloads FFT computation while host ARM processor manages I/O and scheduling. IC Role / Device Role / Timing Role: IDT7026S35J provides non-blocking data buffer between DSP and host; semaphores synchronize DMA transfers. Use Value: Prevents pipeline stalls during burst transfers; 16-bit width matches common DSP data paths without bit-packing. |
| Industrial PLC Memory Expansion | Avionics Data Acquisition Buffer |
|
Use Scenario: Programmable Logic Controller expands local memory for ladder logic state tables and I/O image storage. IC Role / Device Role / Timing Role: Acts as fault-tolerant dual-access scratchpad; MASTER/SLAVE configuration supports redundant controller pairs. Use Value: –40°C to +85°C rating ensures reliability in unconditioned cabinets; 5V TTL compatibility simplifies integration with legacy I/O modules. |
Use Scenario: Flight data recorder buffers high-rate sensor streams (IMU, pressure, temp) prior to compression and storage. IC Role / Device Role / Timing Role: Serves as deterministic latency-bound acquisition buffer; BUSY arbitration prevents data corruption during concurrent read/write bursts. Use Value: 35 ns access meets ARINC-429 and MIL-STD-1553 timing budgets; radiation-tolerant ceramic PLCC variant available for critical zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C136-35JC | 35 ns access, 16K × 16, but uses 3-state BUSY (requires pull-up) and lacks integrated semaphore logic | Requires external arbitration logic for semaphore use; suitable only where BUSY is used solely for stall signaling | Select when existing design already implements discrete semaphore management and board space is constrained |
| Renesas R1EX24016AS0C-35 | 35 ns access, 16K × 16, but operates at 3.3V only and requires level shifters in 5V systems | Not drop-in compatible with 5V TTL buses; incompatible with IDT7026S35J's M/S cascading scheme | Select only for new 3.3V designs prioritizing lower power over legacy interface compatibility |
Compared with CY7C136-35JC and R1EX24016AS0C-35, IDT7026S35J uniquely integrates push-pull BUSY outputs and hardware semaphores - reducing BOM count and eliminating timing-critical external logic in industrial and avionics dual-processor systems.
Availability
IDT7026S35J is available at Aetrix Electronics and suitable for real-time inter-processor communication, DSP co-processing, and industrial PLC memory expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for IDT7026S35J 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), now part of Renesas Electronics, specializes in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.
IDT7026S35J belongs to the 7000-series dual-port SRAM family, designed specifically for deterministic, low-latency memory sharing between heterogeneous processors in mission-critical embedded systems.
FAQ
What is the maximum operating temperature range for IDT7026S35J?
IDT7026S35J is rated for industrial temperature operation from –40°C to +85°C. This specification is production-tested and guaranteed across all electrical parameters in the datasheet, including 35 ns access time and BUSY arbitration timing (tBAA ≤20 ns). It does not support military-grade –55°C to +125°C operation - that requires the IDT7026M variant.
Does IDT7026S35J require external pull-up resistors on BUSY pins?
No. IDT7026S35J features push-pull BUSY outputs (BUSYL and BUSYR) in MASTER mode, eliminating the need for external pull-up resistors. This is confirmed in datasheet Note 2 on page 1: "BUSY outputs are non-tri-stated push-pull." In SLAVE mode, BUSY pins become inputs and remain internally driven - no external termination is required in either configuration.
How many semaphore flags does IDT7026S35J provide, and how are they accessed?
IDT7026S35J provides eight hardware semaphore flags, addressed using A0–A2 and accessed via I/O0 for writing and all I/O lines (I/O0–I/O15) for reading. Access requires CE = VIH and SEM = VIL per Truth Table II (page 4). Each flag supports atomic set/clear operations - critical for lock-free synchronization between left and right ports in the IDT7026S35J.
Can IDT7026S35J be used in a 32-bit data path system?
Yes. IDT7026S35J supports 32-bit expansion using MASTER/SLAVE cascading: one device configured as MASTER (M/S = H) arbitrates BUSY signals, while others operate as SLAVES (M/S = L). The datasheet explicitly states this capability on page 2: "IDT7026 easily expands data bus width to 32 bits or more using the Master/Slave select when cascading more than one device."
What is the standby current consumption of IDT7026S35J under full CMOS input conditions?
Under full CMOS standby conditions (both ports CE > VCC − 0.2 V, all inputs at rail, f = 0), IDT7026S35J consumes 1.0 mA typical and 5 mA maximum ISB3 current - specified in Table 10 (page 6). This ultra-low standby power enables energy-efficient operation in battery-backed or thermally constrained systems without sacrificing 5V interface compatibility.
7026S35J 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:
- 35ns
- Access Time:
- 35 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)
7026S35J FAQ
1.How can I place an order for 7026S35J through Aetrix?
Please submit a Request for Quotation (RFQ) for 7026S35J 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 7026S35J reliable?
The price and inventory of 7026S35J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7026S35J is usually 5 days.
3.What payment methods are accepted for 7026S35J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7026S35J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7026S35J?
7026S35J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7026S35J 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 7026S35J?
For technical support, including 7026S35J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7026S35J requirements.
6.How does Aetrix verify that 7026S35J is sourced from the original manufacturer or authorized distributors?
All 7026S35J 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 7026S35J meets industry standards.
7.What is the process for return or replacement of 7026S35J?
All 7026S35J units undergo pre-shipment inspection (PSI). If there is an issue with 7026S35J, 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 7026S35J part is unused and in its original packaging.
Return procedure for 7026S35J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7026S35J Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
