Renesas 70V05L15JG

Overview

70V05L15JG from IDT is a high-speed 3.3V 8K × 8 dual-port static RAM with true independent left/right ports, 15 ns maximum access time (commercial grade), 380 mW typical active power, and industrial temperature support (–40°C to +85°C). It enables simultaneous read/write access to the same memory location and is used in real-time embedded systems requiring deterministic inter-processor communication, such as industrial PLCs and telecom line cards.

For engineers reviewing the 70V05L15JG datasheet, 70V05L15JG pinout, 70V05L15JG application, or 70V05L15JG equivalent, key selection considerations include dual-port arbitration timing (tAPS, tBDD), BUSY/INT flag behavior, semaphore address mapping (A0–A2), master/slave configuration via M/S pin, and compatibility with 3.3V-only TTL-level control logic.

Technical Context

The 70V05L15JG implements fully asynchronous dual-port operation with on-chip port arbitration logic and hardware semaphore support across eight flags. Each port has independent CE, OE, R/W, and address buses, enabling concurrent access without external glue logic.

It supports MASTER/SLAVE cascading via the M/S pin: when high, BUSYL/BUSYR are outputs indicating port contention; when low, they become inputs for slave-side BUSY synchronization. Semaphore access requires CE = VIH and SEM = VIL, while RAM access requires CE = VIL and SEM = VIH - two mutually exclusive control modes.

Key Specifications

Pinout & Package

70V05L15JG is supplied in a 68-pin Plastic Leaded Chip Carrier (PLCC) package (JG suffix), with 0.05″ lead pitch, ceramic body, and standard JEDEC MO-047AC outline. All VDD pins require local 0.1 µF decoupling; all GND pins must be connected to solid ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC, 70V05L15JG delivers deterministic contention handling without external components; compared with IDT70V25L15PF, it offers through-hole robustness and higher thermal inertia for harsh environments - both alternatives retain functional equivalence but differ in integration level and mechanical fit.

Availability

70V05L15JG is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and avionics applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for 70V05L15JG 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) was a fabless semiconductor company specializing in timing, memory interface, and RF solutions before its acquisition by Renesas in 2019. Its dual-port SRAM portfolio emphasized deterministic real-time performance.

The 70V05L15JG belongs to IDT's high-speed 3.3V dual-port SRAM family, designed specifically for inter-processor communication in deterministic embedded systems where latency predictability and hardware-managed resource sharing are critical.

FAQ

What is the meaning of the 'JG' suffix in 70V05L15JG?

The 'JG' suffix in 70V05L15JG denotes the 68-pin Plastic Leaded Chip Carrier (PLCC) package per IDT's ordering nomenclature. It specifies the physical form factor, lead count, and mounting style - distinct from 'PF' (64-pin TQFP) or 'PG' (68-pin PGA) variants. This suffix directly maps to the JEDEC MO-047AC standard and confirms through-hole compatibility.

Does 70V05L15JG support true simultaneous read operations on both ports to the same address?

Yes, 70V05L15JG supports true simultaneous reads to the same memory location on both ports without contention or arbitration delay. Its dual-port SRAM cell architecture guarantees coherent data output on both I/O buses within tAA (15 ns max), as confirmed in the Functional Block Diagram and Truth Table I. No BUSY assertion occurs during concurrent reads.

How does the M/S pin affect BUSY pin functionality in 70V05L15JG?

In 70V05L15JG, the M/S pin configures BUSYL and BUSYR behavior: when M/S = VIH, both pins function as push-pull outputs indicating local port contention; when M/S = VIL, both become inputs accepting external BUSY signals from a master device. This enables hierarchical arbitration in multi-SRAM systems without external logic.

What are the voltage and timing requirements to access the semaphore registers in 70V05L15JG?

To access semaphore registers in 70V05L15JG, CE must be VIH and SEM must be VIL - the inverse of RAM access conditions. Address bits A0–A2 select one of eight semaphore flags; timing follows tSA (semaphore setup) and tSOP (semaphore output pulse) parameters, both specified at 5 ns min in the AC characteristics table.

Is 70V05L15JG compatible with 5 V logic interfaces?

No, 70V05L15JG is strictly a 3.3 V device: VDD must be 3.3 V ± 0.3 V, and all inputs (including CE, R/W, OE) require TTL-compatible thresholds referenced to 3.3 V (VIH ≥ 2.0 V, VIL ≤ 0.8 V). Direct connection to 5 V logic will exceed absolute maximum ratings and cause permanent damage.