Renesas 7005S35JI8

Overview

7005S35JI8 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 5 V ±10% operation, and integrated hardware semaphore/arbitration logic for concurrent access coordination in real-time embedded systems.

For engineers reviewing the 7005S35JI8 datasheet, 7005S35JI8 pinout, 7005S35JI8 application, or 7005S35JI8 equivalent, this device supports simultaneous asynchronous reads/writes across ports, master/slave configuration via M/S pin, battery-backed data retention at 2 V, and industrial-temperature operation (–40°C to +85°C) in a 64-pin TQFP package.

Technical Context

The 7005S35JI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling concurrent access without external logic. Its on-chip arbitration uses BUSY flag assertion (push-pull output) and address-match or CE-controlled timing to resolve contention.

Hardware semaphore signaling operates via dedicated SEM pins and A0–A2 address lines to select among eight flags; interrupt generation is triggered by writes to specific addresses (e.g., 1FFF_H sets INTR). The device supports both RAM array access (CE = VIL, SEM = VIH) and semaphore/interrupt register access (CE = VIH, SEM = VIL).

Key Specifications

Pinout & Package

64-pin TQFP (PNG64) package with 0.5 mm pitch; body dimensions 14 mm × 14 mm × 1.4 mm. All VCC pins require decoupling; all GND pins must be connected to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-35AXC and AS7C38099B-35JCIN, the 7005S35JI8 uniquely integrates BUSY arbitration and semaphore registers in a 5 V, 64-pin footprint - delivering deterministic real-time coherency without external components or voltage translation.

Availability

7005S35JI8 is available at Aetrix Electronics and suitable for real-time industrial control, avionics data concentrators, medical imaging subsystems, and digital signal processing interfaces requiring stable component supply across extended temperature ranges.

Supply support for 7005S35JI8 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 sensor solutions, now part of Renesas Electronics.

The IDT7005 product line delivers high-speed dual-port SRAMs designed for deterministic real-time systems requiring concurrent processor access, hardware arbitration, and robust industrial/military environmental performance.

FAQ

What is the maximum operating temperature range for the 7005S35JI8?

The 7005S35JI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the "Maximum Operating Temperature and Supply Voltage" table and applies specifically to the 7005S35JI8 variant with J-suffix (industrial grade) and I8 speed grade (35 ns).

Does the 7005S35JI8 support battery backup operation?

Yes, the 7005S35JI8 supports battery backup operation with data retention down to 2 V (VDR = 2.0 V min), as specified in Table 9. This enables memory content preservation during main power failure, a feature inherent to the IDT7005S/L family and confirmed for the 7005S35JI8.

How does the M/S pin affect BUSY pin behavior on the 7005S35JI8?

When M/S = H, BUSYL and BUSYR function as push-pull outputs asserting busy status during port contention; when M/S = L, they become inputs that inhibit writes on the slave port. This dual-mode behavior is explicitly defined in Note 1 of the Pin Names table and functional description for the 7005S35JI8.

Can the 7005S35JI8 perform simultaneous reads from both ports to the same memory address?

Yes, the 7005S35JI8 features true dual-ported memory cells that allow simultaneous reads from the same address location on both left and right ports without contention or delay - a core capability highlighted in the Features section and verified in Truth Table I.

What package type is used for the 7005S35JI8?

The 7005S35JI8 uses a 64-pin thin quad flatpack (TQFP) package, designated PNG64, with dimensions 14 mm × 14 mm × 1.4 mm. This is confirmed in the "Pin Configurations" section and Package Diagram 7005 PNG64(4) on page 2 of the documentation.