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Renesas 7008S35G
- Part No.:
- 7008S35G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 84-BPGA
- Datasheet:
-
7008S35G.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 84PGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,636
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Product details
Overview
IDT7008S35G from Integrated Device Technology (IDT) is a high-speed 64K × 8 true dual-ported static RAM with independent left/right ports, 35 ns maximum access time (commercial grade), TTL-compatible 5 V ±10% supply, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.
For engineers reviewing the IDT7008S35G datasheet, IDT7008S35G pinout, IDT7008S35G application, or IDT7008S35G equivalent, key selection considerations include port-to-port contention handling via BUSY signaling, master/slave cascading capability for 16-bit+ data buses, and low-power standby modes (1 mW typ. for IDT7008L variant) - all validated for industrial temperature operation when specified.
Technical Context
The IDT7008S35G implements fully asynchronous dual-port architecture with separate address, control, and I/O pins per port, enabling simultaneous read/write operations to the same memory location. Its on-chip arbitration logic resolves port conflicts using push-pull BUSY flags and supports both address-match and CE-controlled arbitration timing.
Semaphore functionality is implemented via eight dedicated flags addressed by A0–A2 and accessed using CE = VIH / SEM = VIL, while interrupt signaling uses fixed mailbox addresses FFFEH (left port) and FFFFH (right port), with flag set/clear controlled by write/read cycles under defined enable conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 8 bits (512 Kbit total); enables byte-wide data transfers on each port independently |
| Access Time (tAA) | 35 ns max (commercial temp); defines minimum time from stable address to valid data at outputs |
| Supply Voltage | 5.0 V ±10%; compatible with legacy TTL logic families without level-shifting |
| Operating Temperature | 0°C to +70°C (commercial grade); confirmed for IDT7008S35G per ordering code suffix |
| Standby Current (ISB3) | 0.2 mA typ. (IDT7008L); full CMOS-level standby mode reduces power during idle port states |
| Port Interface | Independent left (L) and right (R) ports with dedicated CE0/CE1, R/W, OE, ADDR, I/O, SEM, INT, BUSY signals |
| Arbitration Logic | Hardware-based BUSY flag generation with tAPS = 5 ns setup; prevents simultaneous writes to same address |
Pinout & Package
Package: 100-pin TQFP (thin quad flatpack), body size ≈ 14 mm × 14 mm × 1.4 mm; RoHS-compliant green variant available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A15L | Left port address inputs | 16-bit address bus for left-side memory access; supports full 64K decoding |
| I/O0L–I/O7L | Left port bidirectional data | 8-bit parallel data path; tri-stated when OEL = VIH or CE0L/CE1L = VIH |
| R/WL | Left port read/write control | Active-low; controls direction of I/O0L–I/O7L during enabled cycles |
| OEL | Left port output enable | Active-low; enables output drivers only when CE0L = VIL and R/WL = VIH |
| CE0L, CE1L | Left port chip enables | Dual enables allow depth expansion without external logic; CE1L supports power-down control |
| SEML, INTL, BUSYL | Left port semaphore/interrupt/busy | SEML enables semaphore access; INTL is totem-pole interrupt flag; BUSYL is push-pull busy indicator (output in master, input in slave) |
| M/S | Master/slave select | VIL configures device as slave (BUSY input); VIH configures as master (BUSY output) |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous reads from same address on both ports - no internal contention or latency penalty |
| On-chip semaphore logic | Eight hardware semaphore flags accessible via A0–A2; eliminates need for external locking circuitry in multi-CPU designs |
| Master/slave cascading | Single M/S pin enables automatic BUSY flag routing between devices for seamless 16-bit+ word expansion |
| Asynchronous port operation | No clock required; each port operates independently with its own control/address/data timing - ideal for heterogeneous processor interfaces |
| Low-power standby modes | ISB3 = 0.2 mA typ. (IDT7008L); achieved via CMOS-level disable of unselected port circuitry |
Applications
| Real-Time Industrial PLC | Multi-Core Communication Bridge |
|---|---|
Use Scenario: Two independent microcontrollers share status registers and command buffers in an industrial programmable logic controller. IC Role / Device Role / Timing Role: IDT7008S35G serves as shared memory with hardware arbitration, eliminating software polling and ensuring deterministic response to I/O events. Use Value: BUSY flag timing (tBDD ≤ 35 ns) guarantees sub-40 ns resolution of port contention, meeting hard real-time scan cycle deadlines. | Use Scenario: ARM Cortex-M7 and RISC-V cores exchange sensor fusion data and control commands in an autonomous edge node. IC Role / Device Role / Timing Role: IDT7008S35G acts as a non-blocking inter-processor mailbox with semaphore-controlled access to critical sections. Use Value: Semaphore update pulse (tSOP = 15 ns) and flag contention window (tSPS = 5 ns) enable lock-free synchronization with <10 ns worst-case latency. |
| Digital Signal Processor Co-Processor | Legacy Bus Interface Adapter |
Use Scenario: DSP and host MCU coordinate FFT processing results and coefficient updates in audio signal chain hardware. IC Role / Device Role / Timing Role: IDT7008S35G provides zero-wait-state shared buffer with interrupt-driven notification (INTL/INTR) for completion signaling. Use Value: Interrupt set/reset times (tINS/tINR ≤ 25 ns) ensure immediate CPU wake-up without polling overhead. | Use Scenario: Bridging ISA or VME bus peripherals to modern microcontroller subsystems requiring 8-bit parallel memory-mapped access. IC Role / Device Role / Timing Role: IDT7008S35G emulates legacy dual-port SRAM behavior with TTL-compatible voltage levels and timing. Use Value: 35 ns access time and 5 V ±10% supply match vintage system timing budgets and power domains without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C028V-35AXC | 32K × 16 organization; 35 ns access; 3.3 V supply; different pinout and semaphore implementation | Requires data bus width adaptation; lacks native master/slave cascading logic | Select when 16-bit data path and lower voltage operation are mandatory; redesign required for BUSY/SEM interface |
| AS7C362000B-35TIN | 64K × 16 organization; 35 ns access; 3.3 V supply; no built-in semaphore or interrupt logic | Higher density but no hardware arbitration; external logic needed for multi-processor sync | Choose for cost-sensitive 16-bit systems where software-managed semaphores are acceptable |
Compared with CY7C028V-35AXC and AS7C362000B-35TIN, the IDT7008S35G uniquely delivers 8-bit dual-port operation at 5 V with integrated hardware arbitration, semaphore, and interrupt functions - reducing BOM count and firmware complexity in real-time embedded designs.
Availability
IDT7008S35G is available at Aetrix Electronics and suitable for real-time industrial PLCs, multi-core communication bridges, digital signal processor co-processors, and legacy bus interface adapters requiring stable component supply across commercial temperature ranges.
Supply support for IDT7008S35G 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
Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019.
The IDT7008S35G belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems requiring hardware-enforced memory coherency.
FAQ
What is the maximum access time specification for IDT7008S35G?
The IDT7008S35G has a maximum address access time (tAA) of 35 ns under commercial temperature conditions (0°C to +70°C) and 5.0 V ±10% supply. This value is production-tested and guaranteed across the full operating range, defining the delay from stable address assertion to valid data appearing at the outputs.
Does IDT7008S35G support true simultaneous read operations from both ports to the same memory location?
Yes, the IDT7008S35G uses true dual-ported memory cells that permit concurrent reads from identical addresses on the left and right ports without conflict, timing penalty, or data corruption - a core architectural feature confirmed in the functional description and truth tables.
How does the BUSY arbitration logic function in IDT7008S35G when configured as a master?
When M/S = VIH (master mode), IDT7008S35G asserts BUSYL or BUSYR as push-pull outputs to block writes on the contending port. Arbitration uses either address-match detection (tBAA ≤ 35 ns) or CE-controlled timing, with tAPS = 5 ns priority setup ensuring deterministic resolution of simultaneous access attempts.
Can IDT7008S35G be used in industrial temperature applications?
The IDT7008S35G is rated for commercial temperature range (0°C to +70°C). For industrial operation (–40°C to +85°C), IDT offers the IDT7008S20G variant (20 ns max access); the '35' speed grade is not qualified for extended temperature use per official datasheet specifications.
What package options are available for IDT7008S35G?
IDT7008S35G is available in a 100-pin TQFP package (PNG100), with body dimensions approximately 14 mm × 14 mm × 1.4 mm. While the IDT7008 family also offers 84-pin PGA and PLCC variants, the '35' speed grade is documented exclusively in the 100-pin TQFP configuration.
7008S35G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 84-BPGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K 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:
- Through Hole
- Supplier Device Package:
- 84-PGA (27.94x27.94)
7008S35G FAQ
1.How can I place an order for 7008S35G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7008S35G 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 7008S35G reliable?
The price and inventory of 7008S35G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7008S35G is usually 5 days.
3.What payment methods are accepted for 7008S35G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7008S35G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7008S35G?
7008S35G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7008S35G 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 7008S35G?
For technical support, including 7008S35G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7008S35G requirements.
6.How does Aetrix verify that 7008S35G is sourced from the original manufacturer or authorized distributors?
All 7008S35G 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 7008S35G meets industry standards.
7.What is the process for return or replacement of 7008S35G?
All 7008S35G units undergo pre-shipment inspection (PSI). If there is an issue with 7008S35G, 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 7008S35G part is unused and in its original packaging.
Return procedure for 7008S35G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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