Renesas 7006S25J8

Overview

7006S25J8 from IDT is a high-speed 16K × 8 (128 Kbit) true dual-port static RAM with independent left/right ports, 25 ns maximum read cycle time (tRC), TTL-compatible 5 V ±10% supply, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to the same memory location and supports MASTER/SLAVE cascading for 16-bit+ data bus expansion in real-time interprocessor communication systems.

For engineers reviewing the 7006S25J8 datasheet, 7006S25J8 pinout, 7006S25J8 application, or 7006S25J8 equivalent, key selection considerations include BUSY flag timing (tBDD ≤ 30 ns), semaphore update pulse width (tSOP = 10 ns), battery backup capability (2 V data retention), and compatibility with industrial temperature range (–40°C to +85°C) operation.

Technical Context

The 7006S25J8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations without external arbitration logic. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports semaphore signaling using A0–A2 address lines to access eight dedicated flags.

It features automatic power-down via CE-controlled standby mode (ISB1 ≤ 16 mA typ. for both ports), operates with TTL-level inputs and outputs, and withstands >2001 V ESD. The device uses CMOS high-performance fabrication and supports both R/W- and CE-controlled write cycles with defined tWP, tDW, and tDH timing constraints.

Key Specifications

Pinout & Package

7006S25J8 is packaged in a 64-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, with 0.5 mm lead pitch and exposed thermal pad (not electrically connected). All VCC and GND pins must be decoupled locally per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-25AXC and IDT70V25S25PF, the 7006S25J8 uniquely delivers 5 V TTL compatibility, guaranteed 2 V data retention, industrial temperature rating, and pin-compatible support for legacy IDT7006 designs-making it the only drop-in option for field-replaceable upgrades in existing dual-processor avionics and control systems.

Availability

7006S25J8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, avionics data acquisition, and industrial PLC redundancy modules requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7006S25J8 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 interconnect solutions, now part of Renesas Electronics.

The IDT7006 product line was engineered for deterministic, low-latency shared memory in safety-critical dual-processor architectures-targeting aerospace, defense, and industrial automation applications demanding hardware-enforced arbitration and battery-backed reliability.

FAQ

What is the maximum operating speed of the 7006S25J8?

The 7006S25J8 has a maximum read cycle time (tRC) of 25 ns, supporting sustained 40 MHz operation per port. This speed applies across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply. Write cycle time (tWC) is also 25 ns max, ensuring symmetrical high-speed bidirectional access without performance asymmetry between read and write paths.

Does the 7006S25J8 support battery backup operation?

Yes, the 7006S25J8 supports battery backup with guaranteed data retention down to 2.0 V (VDR). In data retention mode (CE > VHC, VIN > VHC or < VLC), ICCDR is specified at ≤ 4000 µA for industrial/military grades. This allows direct connection to a 2 V lithium cell to preserve memory contents during main power failure-critical for avionics black box and industrial controller state preservation.

How does the BUSY flag function in MASTER vs. SLAVE configuration?

When M/S = VIH, the 7006S25J8 operates as MASTER: BUSYL and BUSYR are push-pull outputs that assert low during port contention to block conflicting writes. When M/S = VIL, it operates as SLAVE: BUSYL and BUSYR become inputs, allowing external arbitration signals to gate local write operations. This dual-role design enables flexible hierarchical bus topologies without redesigning PCB layout.

Can the 7006S25J8 be used in a 16-bit data bus system?

Yes-the 7006S25J8 supports 16-bit expansion via MASTER/SLAVE cascading. Two devices can be configured with one as MASTER (M/S = H) and the other as SLAVE (M/S = L); their BUSY signals interconnect to coordinate access, and the combined I/O0–I/O15 forms a seamless 16-bit bus. No external glue logic is needed, preserving timing integrity and simplifying board routing.

What package type is used for the 7006S25J8?

The 7006S25J8 uses a 64-pin thin quad flatpack (TQFP) package (PNG64), measuring 14 mm × 14 mm × 1.4 mm with 0.5 mm lead pitch. It features six VCC and six GND pins distributed around the perimeter for optimal power integrity and EMI suppression. Thermal pad is present but not electrically connected-no solder paste required beneath it.