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Renesas 7005S35G
- Part No.:
- 7005S35G
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 68-BPGA
- Datasheet:
-
7005S35G.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 68PGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,997
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Product details
Overview
7005S35G from IDT is a high-speed 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 35 ns max read cycle time (tRC), TTL-compatible 5V ±10% supply, and integrated hardware semaphore/arbitration logic for inter-processor communication in real-time embedded systems.
For engineers reviewing the 7005S35G datasheet, 7005S35G pinout, 7005S35G application, or 7005S35G equivalent, this device supports simultaneous asynchronous access to shared memory, master/slave configuration via M/S pin, BUSY-flag arbitration, and battery-backed data retention down to 2V - critical for fault-tolerant industrial controllers and military avionics.
Technical Context
The 7005S35G implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port (A0L–A12L/I/O0L–I/O7L and A0R–A12R/I/O0R–I/O7R), enabling concurrent reads/writes without internal contention. Its on-chip arbitration logic resolves port conflicts using BUSY flag assertion and priority timing (tAPS = 5 ns min).
It supports two distinct operational modes: RAM access (CE = VIL, SEM = VIH) and semaphore register access (CE = VIH, SEM = VIL), with dedicated INTL/INTR flags and eight hardware semaphores addressed by A0–A2. The device uses CMOS process for low active power (150 mA typ at fMAX) and ultra-low full-standby current (0.2 mA typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 bits (64 Kbit), true dual-port SRAM with independent left/right address/data/control paths |
| Access Time (tRC) | 35 ns max - defines minimum read cycle interval; enables 28.6 MHz sustained throughput per port |
| Supply Voltage | 5.0 V ±10% - TTL-compatible single supply; no level-shifting required in legacy 5V systems |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade operation across full speed grade |
| Standby Current (ISB3) | 0.2 mA typ - achieved when both ports disabled with CMOS-level inputs; enables low-power hold mode |
| Data Retention | 2 V minimum VCC - retains memory contents during brown-out or backup-battery operation |
| Package | 64-pin thin quad flatpack (TQFP), 14 mm × 14 mm × 1.4 mm - surface-mount compatible with automated assembly |
Pinout & Package
7005S35G is housed in a 64-pin TQFP (PNG64) package with 0.5 mm pitch, requiring standard reflow profiles. Pin 1 is marked by corner notch; VCC (pins 8, 23, 40, 64) and GND (pins 9, 24, 39, 47) are distributed for low-noise power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CEL / CER | Chip Enable (Left / Right) | Active-low enable per port; controls port activation and power-down entry (ISB1–ISB4 states) |
| R/WL / R/WR | Read/Write Control (Left / Right) | Active-low write enable; determines direction of data transfer on respective I/O bus |
| OEL / OER | Output Enable (Left / Right) | Active-low output driver control; places I/O pins in high-Z when deasserted |
| A0L–A12L / A0R–A12R | Address Inputs (Left / Right) | 13-bit address buses selecting one of 8K locations independently per port |
| I/O0L–I/O7L / I/O0R–I/O7R | Bidirectional Data (Left / Right) | 8-bit parallel data path per port; supports simultaneous read/write to same location |
| SEML / SEMR | Semaphore Enable (Left / Right) | Active-low select for accessing 8 semaphore registers (A0–A2) instead of RAM array |
| INTL / INTR | Interrupt Flag Output (Left / Right) | Open-collector compatible push-pull outputs signaling semaphore/interrupt events |
| BUSYL / BUSYR | Busy Flag (Left / Right) | Push-pull BUSY signals: output when M/S = H (master), input when M/S = L (slave) |
| M/S | Master/Slave Select | High = BUSY outputs asserted; Low = BUSY inputs accepted - enables cascaded multi-device systems |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous, independent read/write access to identical memory locations - eliminates software locks in multi-CPU systems |
| Hardware semaphore logic | Eight dedicated semaphore registers (A0–A2) with atomic read/write via SEM pin - prevents race conditions without external logic |
| On-chip arbitration | Automatic BUSY flag generation with tAPS = 5 ns setup ensures deterministic resolution of port contention |
| Master/slave cascading | M/S pin configures device as master (BUSY output) or slave (BUSY input), enabling 16-bit+ data bus expansion without glue logic |
| Battery backup support | Operates down to 2V VCC with 100 µA typical retention current - maintains data during main power loss |
Applications
| Industrial PLC Memory Buffer | Military Avionics Shared Memory |
|---|---|
|
Use Scenario: Real-time I/O scanning and program execution in programmable logic controllers where CPU and I/O processor require concurrent memory access. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared scratchpad memory; left port serves CPU, right port serves I/O coprocessor with 35 ns tRC ensuring sub-40 ns response latency. Use Value: Eliminates polling delays and software mutex overhead, enabling deterministic 1 ms scan cycles in SIL-2 compliant systems. |
Use Scenario: Fault-tolerant flight control computers requiring redundant processors to share sensor fusion data and command state. IC Role / Device Role / Timing Role: 7005S35G provides radiation-tolerant (200 V ESD rated), temperature-hardened (−40°C to +85°C) shared memory with hardware arbitration. Use Value: BUSY-flag arbitration and semaphore registers ensure atomic updates across dual-redundant channels without cross-coupling risk. |
| Telecom Line Card Buffer | Medical Imaging Frame Store |
|
Use Scenario: High-throughput packet buffering in telecom line cards where network processor and DSP must exchange frame metadata and payload fragments. IC Role / Device Role / Timing Role: Left port interfaces to network processor (R/WL-controlled), right port to DSP (R/WR-controlled); 35 ns access sustains 28.6 MB/s per port. Use Value: Simultaneous access avoids FIFO bottlenecks; M/S cascading allows 16-bit wide buffers using two devices without external multiplexers. |
Use Scenario: Real-time acquisition and display of ultrasound or MRI frames requiring low-latency pixel data sharing between acquisition FPGA and display controller. IC Role / Device Role / Timing Role: Acts as dual-access frame buffer: acquisition engine writes via left port, display engine reads via right port with guaranteed tBDD ≤ 35 ns. Use Value: Hardware BUSY arbitration prevents visual artifacts during concurrent write/read; 2V data retention preserves last frame during power interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C133-35JC | 35 ns tRC, 8K × 8, 5V, but uses 56-pin SOJ; no integrated semaphore logic; requires external arbitration circuitry | Lacks hardware semaphore and BUSY arbitration - increases BOM count and PCB area in multi-processor designs | Select when cost sensitivity outweighs integration benefits and external logic is already present |
| AS7C38097A-35PCN | 35 ns tRC, 8K × 8, 3.3V core (5V tolerant I/O); 64-pin TQFP; no M/S cascading or BUSY arbitration | Requires level translation in legacy 5V systems; no native master/slave configuration for bus expansion | Prefer for new 3.3V designs where lower power (120 mA typ ICC) and modern packaging are prioritized over legacy compatibility |
Compared with CY7C133-35JC and AS7C38097A-35PCN, the 7005S35G delivers unique value through on-die semaphore registers, push-pull BUSY signaling, and M/S-selectable cascading - reducing system-level complexity in real-time embedded applications requiring deterministic inter-processor coordination.
Availability
7005S35G is available at Aetrix Electronics and suitable for industrial PLCs, military avionics subsystems, and telecom line cards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 7005S35G 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, and RF solutions, now part of Renesas Electronics since 2019.
The IDT7005 family was engineered for high-reliability dual-processor systems demanding zero-contention shared memory, targeting aerospace, defense, and industrial automation markets where deterministic latency and hardware-enforced synchronization are mandatory.
FAQ
What is the maximum operating temperature range for the 7005S35G?
The 7005S35G is rated for industrial temperature operation from −40°C to +85°C across its full 35 ns speed grade. This is explicitly confirmed in the "Maximum Operating Temperature and Supply Voltage" table (page 4) and DC characteristics section (page 5) of the official datasheet, with no derating required at 35 ns performance.
Does the 7005S35G support battery backup operation, and what voltage is required?
Yes, the 7005S35G supports battery backup with data retention down to 2.0 V VCC, as specified in the "Data Retention Characteristics" table (page 5, Table 9). At VCC = 2 V, typical retention current is 100 µA, enabling reliable hold-mode operation during main power failure.
How does the M/S pin configure master versus slave operation in the 7005S35G?
When M/S = H, BUSYL and BUSYR are outputs asserting busy status to external logic; when M/S = L, they become inputs accepting busy signals from other devices. This enables hierarchical arbitration in multi-device systems - a key feature documented in the Functional Block Diagram (page 2) and Pin Names table (page 3).
Can the 7005S35G perform simultaneous reads from both ports to the same memory address?
Yes, the 7005S35G features true dual-port memory cells that allow concurrent reads from both left and right ports to identical addresses without contention or delay - a core capability highlighted in the "Features" section (page 1) and verified in Truth Table I (page 4).
What package type is used for the 7005S35G, and are thermal pads supported?
The 7005S35G is supplied in a 64-pin thin quad flatpack (TQFP, package code PNG64), measuring 14 mm × 14 mm × 1.4 mm. The package drawing (page 2, "Pin Configurations") shows no exposed thermal pad; thermal dissipation relies on standard PCB copper pour under the body and perimeter leads.
7005S35G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 68-BPGA
- Packaging:
- Tray
- 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:
- Through Hole
- Supplier Device Package:
- 68-PGA (29.46x29.46)
7005S35G FAQ
1.How can I place an order for 7005S35G through Aetrix?
Please submit a Request for Quotation (RFQ) for 7005S35G 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 7005S35G reliable?
The price and inventory of 7005S35G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7005S35G is usually 5 days.
3.What payment methods are accepted for 7005S35G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7005S35G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7005S35G?
7005S35G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7005S35G 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 7005S35G?
For technical support, including 7005S35G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7005S35G requirements.
6.How does Aetrix verify that 7005S35G is sourced from the original manufacturer or authorized distributors?
All 7005S35G 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 7005S35G meets industry standards.
7.What is the process for return or replacement of 7005S35G?
All 7005S35G units undergo pre-shipment inspection (PSI). If there is an issue with 7005S35G, 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 7005S35G part is unused and in its original packaging.
Return procedure for 7005S35G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
7005S35G Tags
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AT24C02C-XHM-T
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