Renesas 7024L35J8

Overview

IDT7024L35J8 from Integrated Device Technology (IDT) is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 35 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and battery-backed data retention down to 2V. It enables simultaneous asynchronous access to the same memory location and supports MASTER/SLAVE cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the IDT7024L35J8 datasheet, IDT7024L35J8 pinout, IDT7024L35J8 application, or IDT7024L35J8 equivalent, key selection criteria include dual-port arbitration timing (tBDD ≤ 35 ns), semaphore flag support (A0–A2 addressable), BUSY flag behavior under M/S = H/L configuration, and industrial temperature range (–40°C to +85°C) compliance.

Technical Context

The IDT7024L35J8 implements full on-chip hardware semaphore signaling and port arbitration logic, allowing conflict-free inter-port synchronization without external logic. Its dual independent address/data/control paths support fully asynchronous reads/writes - including simultaneous reads of identical addresses - with separate upper-byte (I/O8–I/O15) and lower-byte (I/O0–I/O7) enables for multiplexed bus compatibility.

It features automatic power-down via chip enable (CE), delivering 1 µA typical standby current in full CMOS-level shutdown mode (ISB3). Battery backup operation is supported at VCC = 2V with guaranteed data retention, and all I/Os are TTL-compatible with VOH ≥ 2.4V and VOL ≤ 0.4V under specified load conditions.

Key Specifications

Pinout & Package

Package: 84-pin PLCC (PLG84), ceramic body approx. 1.15 in × 1.15 in × 0.17 in; pin 1 marked by notch/dot; all VCC and GND pins must be connected per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-55JC and IDT70V24L35PF, the IDT7024L35J8 uniquely delivers 35 ns performance in a 5V/industrial-temperature PLCC package with hardware semaphore and configurable MASTER/SLAVE arbitration - making it irreplaceable in legacy real-time control systems requiring zero-software-coordination shared memory.

Availability

IDT7024L35J8 is available at Aetrix Electronics and suitable for industrial PLC data exchange, real-time signal processing buffers, avionics cross-channel communication, and redundant network switch control planes requiring stable component supply across extended product lifecycles.

Supply support for IDT7024L35J8 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions for communications, computing, and industrial markets.

The IDT7024L35J8 belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems where hardware arbitration and battery-backed retention are mission-critical.

FAQ

What is the maximum operating temperature range for the IDT7024L35J8?

The IDT7024L35J8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Absolute Maximum Ratings and DC Electrical Characteristics tables. This range is explicitly listed for the "Ind" grade variant in Table 2 and applies to the J8 suffix, which denotes industrial temperature qualification.

Does the IDT7024L35J8 support true simultaneous read access to the same memory location from both ports?

Yes, the IDT7024L35J8 implements true dual-ported memory cells that allow simultaneous reads of identical addresses from left and right ports without contention or arbitration delay - a feature explicitly stated in the "Features" section and verified in Truth Table I and timing waveforms.

How does the M/S pin configure arbitration behavior in the IDT7024L35J8?

When M/S = H, the IDT7024L35J8 operates as a MASTER with BUSY output flag; when M/S = L, it operates as a SLAVE with BUSY input. This configuration enables hierarchical arbitration in cascaded systems - e.g., one MASTER asserts BUSY to block SLAVE writes during critical updates - as defined in the functional description and pin table.

What is the data retention voltage specification for the IDT7024L35J8?

The IDT7024L35J8 supports data retention at VCC = 2.0 V minimum, with ICCDR ≤ 4 mA over the full industrial temperature range. This is documented in Table 10 ("Data Retention Characteristics") and confirmed in the "Battery backup operation-2V data retention" feature bullet.

Which package type is used by the IDT7024L35J8, and how many pins does it have?

The IDT7024L35J8 uses an 84-pin PLCC (PLG84) package, as indicated by the "J8" suffix per IDT's ordering information and confirmed in the Pin Configuration diagrams (drawing 2740 drw 02F). The physical dimensions are approximately 1.15 in × 1.15 in × 0.17 in.