Renesas 70V26L35G

Overview

70V26L35G from Integrated Device Technology (IDT) is a high-speed, low-power 16K × 16-bit true dual-port static RAM with independent left/right ports, 35 ns max access time, 3.3 V single supply, and integrated hardware semaphore logic for inter-processor resource arbitration in real-time embedded systems.

For engineers reviewing the 70V26L35G datasheet, 70V26L35G pinout, 70V26L35G application, or 70V26L35G equivalent, this device supports simultaneous asynchronous read/write operations across two fully independent ports, provides push-pull BUSY signaling for contention resolution, and enables master/slave cascading for 32-bit+ bus expansion without external logic.

Technical Context

The 70V26L35G implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-no shared timing constraints between left and right sides. It integrates on-chip arbitration logic that resolves address-contention events via push-pull BUSY outputs and supports both chip-enable–based and address-match–based arbitration modes.

Semaphore functionality operates in a dedicated 8-flag register space accessed via SEM = VIL, using A0–A2 to select flags and I/O0 to write; all 16 I/O lines reflect flag state on read. The device uses CMOS process technology and features automatic power-down per port via CE, achieving 660 µW standby current at 3.3 V.

Key Specifications

Pinout & Package

70V26L35G is packaged in an 84-pin PLCC (Plastic Leaded Chip Carrier) with 1.15 in × 1.15 in body size and standard surface-mount footprint compatible with JEDEC MO-118.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-45AXC and IDT70V36S25PFI, the 70V26L35G uniquely balances 35 ns performance, 3.3 V operation, hardware semaphore support, and 84-pin PLCC compactness-making it optimal for real-time embedded systems where deterministic inter-processor communication and board space efficiency are critical.

Availability

70V26L35G is available at Aetrix Electronics and suitable for industrial motion controllers, avionics display systems, and medical imaging data pipelines requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 70V26L35G 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 70V26L35G belongs to IDT's high-speed dual-port SRAM product line, designed specifically for real-time multiprocessing systems requiring deterministic, hardware-accelerated inter-processor communication and resource sharing.

FAQ

What is the maximum operating temperature range for the 70V26L35G?

The 70V26L35G is rated for commercial temperature range: 0°C to +70°C. It is not specified for industrial (–40°C to +85°C) operation-this distinction is confirmed in the Absolute Maximum Ratings and Operating Conditions tables of the official datasheet, where only the "70V26S" and "70V26L" base part numbers (without suffix) list industrial grade; the "35G" suffix denotes 35 ns commercial-grade timing.

Does the 70V26L35G support simultaneous read operations from both ports to the same memory address?

Yes, the 70V26L35G supports true simultaneous reads from both ports to the same memory location without contention or BUSY assertion. This capability is explicitly stated in the Features section: "True Dual-Ported memory cells which allow simultaneous reads of the same memory location." BUSY is only asserted during simultaneous write/write or read/write conflicts.

How is semaphore access enabled on the 70V26L35G?

Semaphore access on the 70V26L35G requires CE = VIH and SEM = VIL-opposite of normal RAM access. Address bits A0–A2 select one of eight semaphore flags, I/O0 writes the flag (0 = request, 1 = release), and all 16 I/O lines reflect the flag state on read. This mode is detailed in Truth Table II and the Functional Description section of the datasheet.

What package type is used for the 70V26L35G?

The 70V26L35G uses an 84-pin PLCC (Plastic Leaded Chip Carrier) package, as confirmed by the Pin Configurations diagram (DSC 2945/19, page 2), ordering information notes, and mechanical dimensions (1.15 in × 1.15 in × 0.17 in). It is not offered in PGA or other variants under this specific part number.

Can the 70V26L35G be used in a master/slave configuration for 32-bit data bus expansion?

Yes, the 70V26L35G supports master/slave cascading via the M/S pin: tie M/S = VIH for master (BUSY outputs), M/S = VIL for slave (BUSY inputs). One master coordinates BUSY arbitration across multiple slaves, enabling seamless 32-bit-or-wider word systems without external logic-explicitly documented in the Features and Functional Description sections.