Renesas 7005L15JG

Overview

7005L15JG from IDT is a high-speed 8K × 8 dual-port static RAM with true simultaneous read access, 15 ns max read cycle time (commercial grade), TTL-compatible 5 V ±10% supply, and integrated port arbitration logic. It operates as standalone 64 Kbit memory or master/slave pair for 16-bit+ systems in industrial control and real-time data buffering.

For engineers reviewing the 7005L15JG datasheet, 7005L15JG pinout, 7005L15JG application, or 7005L15JG equivalent, key selection criteria include bus contention handling via BUSY/SEM/INT signals, battery-backed data retention at 2 V, and low-power active/standby current (700 mW / 1 mW typ) in TQFP-64 package.

Technical Context

The 7005L15JG implements fully asynchronous dual-port architecture with independent left/right address buses (A0L–A12L, A0R–A12R), I/O banks (I/O0L–I/O7L, I/O0R–I/O7R), and dedicated control lines (CEL/CER, R/WL/R/WR, OEL/OER). Its on-chip arbitration logic resolves port conflicts using BUSY flag timing (tBAA ≤15 ns) and semaphore signaling (8 flags addressed by A0–A2).

It supports two operational modes: RAM access (CE = VIL, SEM = VIH) and semaphore register access (CE = VIH, SEM = VIL), with separate truth tables governing read/write behavior. The M/S pin configures master (BUSY output) or slave (BUSY input) operation for cascaded 16-bit memory expansion.

Key Specifications

Pinout & Package

7005L15JG is housed in a 64-pin thin quad flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body size, and 1.4 mm height. All VCC pins require connection to 5 V supply; all GND pins must be tied to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15JC and IDT70V25L15PF, the 7005L15JG uniquely combines 5 V TTL compatibility, 2 V battery backup, and commercial-grade 15 ns performance in a compact 64-pin TQFP-making it optimal for legacy industrial designs requiring drop-in reliability and power-fail resilience.

Availability

7005L15JG is available at Aetrix Electronics and suitable for industrial PLCs, avionics sensor hubs, and medical imaging subsystems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for 7005L15JG 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 signal conditioning ICs, now part of Renesas Electronics.

The IDT7005 family was designed specifically for high-reliability dual-ported memory applications in real-time control, communications infrastructure, and military/aerospace systems requiring deterministic arbitration and seamless master/slave expansion.

FAQ

What is the maximum operating temperature range for the 7005L15JG?

The 7005L15JG is rated for commercial temperature operation from 0°C to +70°C. It is not qualified for industrial (−40°C to +85°C) or military ranges; those variants carry different suffixes (e.g., 7005L15JGI for industrial grade). This specification is confirmed in Table 5 of the official datasheet under "Grade" and "Ambient Temperature".

Does the 7005L15JG support battery backup operation, and what voltage is required?

Yes, the 7005L15JG supports battery backup with data retention at 2.0 V (VDR = 2.0 V min), as specified in Table 9. In this mode, ICCDR is ≤4000 µA across military/industrial grades and ≤1500 µA for commercial grade. The device maintains stored data without refresh while main VCC is absent or below retention threshold.

How does the M/S pin affect BUSY signal behavior on the 7005L15JG?

When M/S = H, the 7005L15JG operates as master: BUSYL and BUSYR are push-pull outputs indicating port contention. When M/S = L, it operates as slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a master device. This is explicitly defined in Note 1 of the Pin Names table and functional block diagram notes.

Can the 7005L15JG perform simultaneous reads from both ports to the same memory address?

Yes, the 7005L15JG features true dual-ported memory cells enabling simultaneous reads from identical addresses on left and right ports without conflict, arbitration delay, or data corruption. This capability is highlighted in the "Features" section and confirmed by the "Non-Contention Read/Write Control" truth table (Table 2), where CE = L, R/W = H, OE = L yields DATAOUT on both ports.

What is the function of the SEM pins on the 7005L15JG, and how are semaphores accessed?

SEML and SEMR enable access to eight on-chip semaphore registers. When SEM = VIL and CE = VIH, writes to I/O0 set or clear semaphore flags; reads from I/O0–I/O7 retrieve flag status. Semaphores are addressed by A0–A2 per port, as documented in Truth Table II and the "Semaphore Read/Write Control" section of the datasheet.