Renesas 7024L55G

Overview

7024L55G from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 55 ns max read cycle time, TTL-compatible 5V ±10% supply, and 1 µA typical standby current (L-version). It supports simultaneous asynchronous access, on-chip semaphore signaling, and battery backup data retention down to 2V - enabling use in real-time inter-processor communication systems requiring deterministic arbitration.

For engineers reviewing the 7024L55G datasheet, 7024L55G pinout, 7024L55G application, or 7024L55G equivalent, this page delivers verified specifications including BUSY/INT flag behavior, M/S master/slave arbitration logic, byte-selectable I/O control (UBL/LBL), and full port-to-port timing parameters for contention resolution in dual-CPU architectures.

Technical Context

The 7024L55G implements fully asynchronous dual-port operation with separate address, control, and bidirectional I/O buses per port. Its on-chip arbitration logic resolves simultaneous access via BUSY flag assertion (M/S = H) or BUSY input (M/S = L), while semaphore registers (addressed by A0–A2) enable inter-port synchronization without external logic.

It supports two distinct memory access modes: standard RAM access (CE = VIL, UB/LB = VIL, SEM = VIH) and semaphore register access (CE = VIH or UB&LB = VIH, SEM = VIL), with dedicated timing parameters (tSAA, tSWRD, tSPS) guaranteeing atomic flag updates and contention window resolution.

Key Specifications

Pinout & Package

7024L55G is packaged in a 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green-part qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-55AXC and AS7C34096A-55PCN, the 7024L55G uniquely delivers native 5V TTL operation, sub-µA battery retention, and integrated hardware arbitration - making it irreplaceable in industrial and avionics systems where deterministic timing, power resilience, and minimal BOM count are mandatory.

Availability

7024L55G is available at Aetrix Electronics and suitable for industrial PLC communication modules, avionics flight control interfaces, and medical imaging data buffers requiring stable component supply across extended product lifecycles.

Supply support for 7024L55G 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, and RF solutions, now part of Renesas Electronics.

The 7024L55G belongs to IDT's high-speed dual-port SRAM family, designed specifically for real-time inter-processor communication in industrial, aerospace, and medical systems demanding hardware-enforced data coherency.

FAQ

What is the guaranteed maximum read cycle time for the 7024L55G?

The 7024L55G has a guaranteed maximum read cycle time (tRC) of 55 ns across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply. This parameter is production-tested and applies to both ports under worst-case voltage and temperature conditions, ensuring deterministic timing for synchronous interface designs.

How does the 7024L55G support battery backup operation?

The 7024L55G supports battery backup with a minimum VCC of 2.0 V and consumes only 0.2 µA typical current (ISB3) in full standby mode. At 2V, it retains valid data indefinitely without external circuitry - a key feature distinguishing the "L" (low-power) version from the "S" variant, which lacks this capability.

Can the 7024L55G be used in a master/slave configuration with other IDT7024 devices?

Yes - the 7024L55G implements dedicated M/S (Master/Slave Select) logic. When M/S = H, BUSY is an output flag indicating arbitration conflict; when M/S = L, BUSY becomes an input that halts writes until cleared. This enables seamless cascading of multiple 7024L55G devices to build 32-bit or wider memory systems without external arbitration logic.

What is the function of the SEM pins on the 7024L55G?

The SEML and SEMR pins on the 7024L55G control access mode: when SEM = VIH, the port accesses the 4K × 16 RAM array; when SEM = VIL, the port accesses eight hardware semaphore flags (addressed by A0–A2). This dual-mode operation enables atomic flag manipulation without CPU intervention or additional memory mapping.

Does the 7024L55G require external pull-up resistors on BUSY or INT pins?

No - the BUSYL, BUSYR, INTL, and INTR pins on the 7024L55G are push-pull outputs (per datasheet Note 2), not open-drain. They drive actively high or low and do not require external pull-up resistors, simplifying PCB layout and ensuring robust signal integrity in noisy industrial environments.