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Renesas 7005S35J8
- Part No.:
- 7005S35J8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
7005S35J8.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 68PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
7005S35J8 from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 35 ns maximum read cycle time (tRC), TTL-compatible 5V ±10% operation, and integrated semaphore/arbitration logic for real-time inter-processor communication in embedded control systems.
For engineers reviewing the 7005S35J8 datasheet, 7005S35J8 pinout, 7005S35J8 application, or 7005S35J8 equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, semiconductor-level DC/AC electrical characteristics, and dual-port memory interface design guidance for industrial and military-grade systems.
Technical Context
The 7005S35J8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O7L/R/WL/CEL/OEL on left; A0R–A12R/I/O0R–I/O7R/R/WR/CER/OER on right), enabling simultaneous reads to the same location without contention. It supports both CE-controlled and R/W-controlled write cycles with tWC = 35 ns.
On-chip hardware includes priority-based port arbitration (via tAPS = 5 ns setup), push-pull BUSY flag signaling (BUSYL/BUSYR), interrupt generation (INTL/INTR) triggered at fixed addresses (1FFEh/1FFFh), and eight semaphore registers accessible via A0–A2 with tSAA ≤ 35 ns and tSOP = 15 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit total, two independent 8K × 8 arrays) |
| Access Time (tRC) | 35 ns max - defines minimum read cycle interval for full-speed operation |
| Supply Voltage | 5.0 V ±10% - single TTL-compatible rail; no dual-supply or level-shifting required |
| Operating Temperature | −40°C to +85°C - qualified for industrial applications per datasheet |
| Power Consumption | Active: 150 mA typ (ICC), Standby: 13 mA typ (ISB1) - enables low-duty-cycle embedded use |
| Package | 64-pin TQFP (PNG64) - 14 mm × 14 mm × 1.4 mm footprint, surface-mount compatible |
| Bus Interface | True dual-port with independent I/Os - eliminates external multiplexing or glue logic in 16-bit+ systems |
Pinout & Package
64-pin thin quad flatpack (TQFP, package code PNG64), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I/O0L–I/O7L | Left-port bidirectional data bus | 8-bit parallel interface for left-side processor; tri-stated when OEL = H or CEL = H |
| I/O0R–I/O7R | Right-port bidirectional data bus | 8-bit parallel interface for right-side processor; independent timing and control from left port |
| A0L–A12L | Left-port address inputs | 13-bit address bus selecting one of 8K locations on left port only |
| A0R–A12R | Right-port address inputs | 13-bit address bus selecting one of 8K locations on right port only; no shared address lines |
| CEL / CER | Chip enable (left/right) | Active-low enables respective port; deassertion places port in standby (ISB1/ISB2 modes) |
| R/WL / R/WR | Read/write control (left/right) | Low = write, High = read; controls direction of I/O bus and internal memory access path |
| OEL / OER | Output enable (left/right) | Active-low enables output drivers; used with R/W = H to gate read data onto I/O bus |
| SEML / SEMR | Semaphore enable (left/right) | Active-low selects semaphore register access mode instead of RAM array (CE = VIH, SEM = VIL) |
| INTL / INTR | Interrupt flag outputs | Open-drain capable (per datasheet note); asserted low at fixed addresses 1FFEh (left) or 1FFFh (right) |
| BUSYL / BUSYR | Busy flag (input/output) | Push-pull; output when M/S = H (master), input when M/S = L (slave); blocks writes during arbitration |
| M/S | Master/slave select | H = BUSY outputs enabled; L = BUSY inputs accepted; determines arbitration role in cascaded systems |
| VCC / GND | Power supply | Multiple VCC (pins 8, 22, 37, 49, 64) and GND (pins 9, 23, 38, 50) pins ensure low-noise operation |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads from both ports to identical addresses without conflict or added latency |
| Hardware semaphore support | Eight dedicated flags accessed via A0–A2; eliminates software polling and reduces inter-processor synchronization overhead |
| On-chip arbitration logic | Automatic BUSY assertion based on address match or CE timing; resolves port contention without external logic |
| Master/slave cascading capability | M/S pin configures device as master (BUSY output) or slave (BUSY input), enabling 16-bit+ data bus expansion |
| Battery backup data retention | Operates down to 2.0 V VCC with ICCDR ≤ 4000 µA (military/industrial), supporting non-volatile holdover |
Applications
| Industrial PLC Communication | Military Avionics Data Exchange |
|---|---|
Use Scenario: Two independent microcontrollers in a programmable logic controller exchange status and command data via shared memory. IC Role / Device Role / Timing Role: Dual-port RAM serves as synchronous message buffer with hardware arbitration preventing write collisions during real-time I/O scanning. Use Value: 35 ns tRC enables sub-30 MHz CPU handshaking; BUSY-driven arbitration ensures deterministic response under worst-case load. | Use Scenario: Flight control computer and sensor processing unit share telemetry and actuator commands in a MIL-STD-1553B-adjacent subsystem. IC Role / Device Role / Timing Role: 7005S35J8 acts as fault-tolerant inter-processor memory with −40°C to +85°C operation and 2V data retention for brownout resilience. Use Value: Push-pull BUSY outputs meet avionics EMI requirements; M/S pin allows master/slave configuration without redesign. |
| Medical Imaging Frame Buffer | Telecom Baseband Processing |
Use Scenario: Image acquisition engine writes raw pixel data while display controller reads rendered frames - both operating concurrently. IC Role / Device Role / Timing Role: Dual-port SRAM buffers full 64Kbit frame data; semaphore flags coordinate frame-ready/frame-consumed signaling. Use Value: Independent left/right timing avoids pipeline stalls; tSOP = 15 ns guarantees fast semaphore update for high-throughput imaging. | Use Scenario: Digital signal processors in wireless infrastructure equipment exchange FFT results and channel estimates across parallel processing paths. IC Role / Device Role / Timing Role: 7005S35J8 provides low-latency shared memory between DSP cores with hardware-enforced mutual exclusion. Use Value: tWDD ≤ 60 ns and tDDD ≤ 45 ns minimize port-to-port write-read delay, critical for real-time baseband loop timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C024AV-35AXC | 35 ns access, 8K × 16 organization, 3.3 V core (5 V tolerant I/O), 100-pin TQFP | Wider data bus; requires voltage translation for legacy 5 V systems; higher pin count increases PCB area | Select when 16-bit word width is mandatory and 3.3 V design infrastructure exists. |
| IDT70V25L35PF | 35 ns, 8K × 8, 3.3 V supply only, 64-pin TQFP, LVDS-compatible | Lower power (ISB1 = 2 mA), but incompatible with 5 V TTL logic families without level shifters | Choose for new low-power designs where 3.3 V system integration is feasible and 5 V tolerance is unnecessary. |
Compared with CY7C024AV-35AXC and IDT70V25L35PF, the 7005S35J8 uniquely supports direct 5 V TTL interfacing, industrial temperature range, and battery-backed 2 V data retention - making it optimal for legacy-mixed or ruggedized embedded systems requiring zero-level-shift interoperability.
Availability
7005S35J8 is available at Aetrix Electronics and suitable for industrial PLC communication, military avionics data exchange, medical imaging frame buffering, and telecom baseband processing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7005S35J8 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 high-performance silicon solutions for communications, computing, and industrial markets.
The 7005S35J8 belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic real-time inter-processor communication in harsh-environment systems where hardware arbitration, low-latency access, and wide temperature operation are critical.
FAQ
What is the maximum operating temperature range certified for the 7005S35J8?
The 7005S35J8 is specified for industrial temperature operation from −40°C to +85°C, as confirmed in the "Maximum Operating Temperature and Supply Voltage" table and "DC Electrical Characteristics" section of the official IDT datasheet. This rating applies to all speed grades including the 35 ns variant, and is validated across the full 5.0 V ±10% supply range.
Does the 7005S35J8 support true simultaneous read operations from both ports to the same memory address?
Yes, the 7005S35J8 implements true dual-port memory cells that allow concurrent reads from the left and right ports to identical addresses without contention or timing penalty. This capability is explicitly stated in the "Features" section and verified by the "Truth Table I" and functional block diagram, which confirm independent I/O, address, and control paths per port.
How does the M/S pin affect BUSY signal behavior in the 7005S35J8?
When M/S = H, the 7005S35J8 operates as a master: BUSYL and BUSYR are push-pull outputs asserting busy state during arbitration. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a master device. This dual-mode behavior is defined in Note 1 of the Pin Names table and Figure 13 timing diagrams.
What is the data retention capability of the 7005S35J8 under low-voltage conditions?
The 7005S35J8 supports data retention at VCC = 2.0 V, with maximum ICCDR of 4000 µA over the military/industrial temperature range. This is documented in Table 9 ("Data Retention Characteristics") and confirmed by the "Data Retention Waveform" figure, enabling reliable holdover during brownout or battery-backup scenarios.
Can the 7005S35J8 be used in a 16-bit data bus configuration?
Yes - the 7005S35J8 supports 16-bit expansion using master/slave cascading. One device is configured as master (M/S = H) and another as slave (M/S = L); the master's BUSY output drives the slave's BUSY input, enabling coordinated access across two 8-bit devices. This method is described in the "Description" section and eliminates need for external arbitration logic.
7005S35J8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- 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:
- 68-PLCC (24.21x24.21)
7005S35J8 FAQ
1.How can I place an order for 7005S35J8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005S35J8 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 7005S35J8 reliable?
The price and inventory of 7005S35J8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005S35J8 is usually 5 days.
3.What payment methods are accepted for 7005S35J8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005S35J8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005S35J8?
7005S35J8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005S35J8 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 7005S35J8?
For technical support, including 7005S35J8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005S35J8 requirements.
6.How does Aetrix verify that 7005S35J8 is sourced from the original manufacturer or authorized distributors?
All 7005S35J8 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 7005S35J8 meets industry standards.
7.What is the process for return or replacement of 7005S35J8?
All 7005S35J8 units undergo pre-shipment inspection (PSI). If there is an issue with 7005S35J8, 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 7005S35J8 part is unused and in its original packaging.
Return procedure for 7005S35J8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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