Renesas 7025S35G

Overview

7025S35G from IDT is a high-speed 8K × 16 (128 Kbit) true dual-port static RAM with independent asynchronous left/right ports, 35 ns maximum read cycle time, TTL-compatible 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous reads of the same memory location and enables 32-bit+ bus expansion via Master/Slave cascading in real-time control systems.

For engineers reviewing the 7025S35G datasheet, 7025S35G pinout, 7025S35G application, or 7025S35G equivalent, key selection considerations include BUSY arbitration timing (tBAA ≤ 20 ns), semaphore flag support for inter-port synchronization, battery-backed data retention at 2 V, and compatibility with 84-pin PLCC packaging for legacy industrial PCBs.

Technical Context

The 7025S35G implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations without external logic. Its on-chip arbitration logic resolves contention using BUSY flag signaling-asserted when both ports access the same address-and supports both address-match and chip-enable arbitration modes (M/S = H/L).

It integrates full hardware semaphore signaling across eight flags (addressed by A0–A2), interrupt flag generation (INTL/INTR), and byte-selectable I/O (UBL/LBL, UBR/LBR) for multiplexed bus interfacing. The device operates in three power states: active (typ. 150 mA), standby (ISB1 = 13 mA), and full standby (ISB3 = 1.0 mA), with 2 V data retention capability unique to the 'L' variant-but 7025S35G is an 'S' version and does not support 2 V retention.

Key Specifications

Pinout & Package

7025S35G is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.12 in × 1.12 in × 0.16 in, with gull-wing leads and standard JEDEC MO-047A outline. Pin 1 identifier is a corner notch; orientation follows top-view diagram in datasheet DSC 2683/13.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-35JC and IDT70V25S35PF, the 7025S35G uniquely delivers hardware-enforced port arbitration and semaphore signaling in a 5 V, 84-pin PLCC package - making it irreplaceable in deterministic real-time systems where external arbitration adds unacceptable latency or complexity.

Availability

7025S35G is available at Aetrix Electronics and suitable for industrial motion controllers, avionics data routers, and telecom line cards requiring stable component supply across extended product lifecycles.

Supply support for 7025S35G 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 since 2019.

The IDT7025 family was designed specifically for high-reliability dual-processor and real-time embedded systems requiring deterministic memory access, hardware arbitration, and industrial-grade thermal performance - not general-purpose memory replacement.

FAQ

What is the maximum operating temperature range for the 7025S35G?

The 7025S35G is rated for industrial temperature operation from –40°C to +85°C. This range is validated per datasheet DSC 2683/13 and applies across all AC and DC specifications including access time, power consumption, and BUSY arbitration timing. It is not qualified for military-grade (–55°C to +125°C) operation.

Does the 7025S35G support battery backup data retention?

No, the 7025S35G does not support battery backup data retention. That feature is exclusive to the 'L' variant (e.g., 7025L35G), which specifies 2 V data retention current (ICCDR ≤ 4000 µA). The 'S' suffix denotes standard power operation only, with minimum VCC = 4.5 V for full functionality.

Can the 7025S35G be used in a Master/Slave configuration with other IDT7025 devices?

Yes, the 7025S35G supports Master/Slave cascading via the M/S pin: set M/S = H for master (BUSY output), M/S = L for slave (BUSY input). When cascaded, the master's BUSYR drives the slave's BUSYL, enabling coordinated 32-bit+ word access without external glue logic - as confirmed in functional block diagram and truth tables of DSC 2683/13.

What is the meaning of the 'G' suffix in 7025S35G?

The 'G' suffix in 7025S35G indicates the device is supplied in an 84-pin PLCC package with lead-free (Pb-free) finish and green material compliance, per IDT's ordering nomenclature in DSC 2683/13. It does not denote speed grade, temperature range, or revision - those are encoded in 'S35' (S = standard power, 35 = 35 ns speed).

Is the 7025S35G pin-compatible with the 7025S25G or 7025S20G?

Yes, the 7025S35G is pin-compatible with other speed grades in the same package variant (e.g., 7025S25G, 7025S20G), as all share identical 84-pin PLCC pinout, power/ground assignments, and signal definitions per datasheet DSC 2683/13. Speed differences affect only timing parameters - not connectivity or logic behavior.