Renesas 7024L20FB

Overview

7024L20FB from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 20 ns max access time (industrial grade), 2V data retention capability, and full on-chip semaphore/arbiter logic - deployed in real-time inter-processor communication systems requiring simultaneous read/write to shared memory locations.

For engineers reviewing the 7024L20FB datasheet, 7024L20FB pinout, 7024L20FB application, or 7024L20FB equivalent, key selection considerations include BUSY flag arbitration timing (tBAA ≤ 20 ns), dual-port standby current (ISB3 = 0.2 mA typ.), TTL-compatible 5V ±10% operation, and 100-pin TQFP packaging for high-density board layouts.

Technical Context

The 7024L20FB implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent access without external logic. Its on-chip arbitration resolves contention via BUSY flag signaling and supports Master/Slave cascading for 32-bit+ bus expansion.

It integrates full hardware semaphore logic (8 flags, addressed by A0–A2) and battery backup mode (2V VCC, 100 µA ICCDR typ.) with guaranteed data retention across –40°C to +85°C. The L-version delivers ultra-low standby power: ISB3 = 0.2 mA (both ports in CMOS-level standby).

Key Specifications

Pinout & Package

7024L20FB is housed in a 100-pin TQFP (PNG100) package with 0.5 mm pitch, 14 mm × 14 mm body, and 1.4 mm height. Pin functions are symmetrically distributed for left (L) and right (R) ports, including dedicated semaphore (SEML/SEMR), interrupt (INTL/INTR), and BUSY (BUSYL/BUSYR) signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-20JC and AS7C34096A-20TIN, the 7024L20FB uniquely delivers true 16-bit dual-port operation with integrated semaphore, BUSY arbitration, and 2V retention - eliminating external logic and enabling deterministic inter-processor communication in space-constrained industrial and avionics designs.

Availability

7024L20FB is available at Aetrix Electronics and suitable for industrial PLC communication hubs, avionics flight control interfaces, and medical imaging data buffers requiring stable component supply across extended product lifecycles.

Supply support for 7024L20FB 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 7024L20FB belongs to IDT's legacy high-speed dual-port SRAM family, engineered for deterministic inter-processor communication in real-time embedded systems demanding hardware arbitration and battery-backed memory retention.

FAQ

What is the maximum operating temperature range for the 7024L20FB?

The 7024L20FB is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings table and DC Electrical Characteristics section of the official IDT datasheet, ensuring reliable performance in demanding industrial and transportation environments without derating.

Does the 7024L20FB support true simultaneous read operations on both ports?

Yes, the 7024L20FB implements true dual-port memory cells that allow independent, asynchronous reads from both left and right ports to the same memory location without contention or delay. This capability is explicitly stated in the Features section and verified by the functional block diagram showing fully separate I/O control paths for each port.

How does the 7024L20FB handle port contention during simultaneous writes?

The 7024L20FB uses hardware-based arbitration via the BUSY flag: when both ports attempt to write to the same address, the BUSY signal asserts to block the lower-priority port until the higher-priority write completes. Timing parameters tBAA (≤20 ns) and tBDD (≤30 ns) define the deterministic response window, as documented in Table 14a of the datasheet.

What is the data retention voltage and current for the 7024L20FB?

The 7024L20FB retains data at VCC = 2.0 V with typical retention current (ICCDR) of 100 µA and maximum of 4000 µA across the industrial temperature range. These values are specified in Table 10 (Data Retention Characteristics) and apply exclusively to the "L" (low-power) variant, confirming its suitability for battery-backed applications.

Which package type is used for the 7024L20FB, and what are its mechanical dimensions?

The 7024L20FB is packaged in a 100-pin Thin Quad Flatpack (TQFP) with package code PNG100, measuring 14 mm × 14 mm × 1.4 mm. This is confirmed in the Pin Configurations section (page 3, drawing 2740 drw 03) and supported by the ordering information footnote specifying "100-pin TQFP" for the "FB" suffix variant.