Renesas 7027L25PF

Overview

IDT7027L25PF from Integrated Device Technology (IDT) is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address, 25 ns maximum access time, 1 mW typical standby power, and TTL-compatible 5 V ±10% operation - deployed in real-time industrial motion controllers for deterministic inter-processor data exchange.

For engineers reviewing the IDT7027L25PF datasheet, IDT7027L25PF pinout, IDT7027L25PF application, or IDT7027L25PF equivalent, key selection considerations include bus-matching byte controls (UBL/LBL), on-chip semaphore arbitration, MASTER/SLAVE cascading capability, and industrial temperature support (–40°C to +85°C).

Technical Context

The IDT7027L25PF implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves contention via BUSY flag assertion based on address match or chip enable timing, with tBDD ≤ 25 ns propagation delay from write completion to valid read data on the opposing port.

It supports semaphore signaling across ports using dedicated SEM pins and A0–A2 addressing of eight shared flags, with tSWRD = 5 ns minimum write-to-read latency. Interrupts are generated by writes to fixed mailbox addresses (7FFE_H/7FFF_H), with tINS/tINR ≤ 20 ns setup/reset timing.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-25AXC and AS7C33256B-25JIN, the IDT7027L25PF delivers integrated hardware arbitration, semaphore registers, and interrupt mailboxes - reducing BOM count and firmware complexity in tightly coupled multi-processor systems requiring deterministic inter-core communication.

Availability

IDT7027L25PF is available at Aetrix Electronics and suitable for industrial motion control, avionics data concentrators, redundant safety PLCs, and digital signal processor co-processor interfaces requiring stable component supply across extended product lifecycles.

Supply support for IDT7027L25PF 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), now part of Renesas Electronics, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT7027L25PF belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems with strict timing constraints.

FAQ

What is the maximum operating temperature range for the IDT7027L25PF?

The IDT7027L25PF is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including access time (tAA ≤ 25 ns), standby current (ISB3 ≤ 0.2 mA typ.), and output voltage levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V) under worst-case VCC = 4.5 V conditions. The device uses CMOS process technology optimized for thermal stability in enclosed control cabinets.

Does the IDT7027L25PF support true simultaneous access to the same memory location?

Yes, the IDT7027L25PF implements true dual-ported memory cells that allow concurrent read and write operations to the identical address location. When contention occurs, on-chip arbitration asserts BUSY on the later-arriving port within tBAA ≤ 20 ns, blocking the write until the first operation completes. This hardware-enforced serialization eliminates need for external arbitration logic in the IDT7027L25PF design.

How does the MASTER/SLAVE configuration work in the IDT7027L25PF?

The M/S pin configures the IDT7027L25PF as either MASTER (M/S = VIH) or SLAVE (M/S = VIL). In MASTER mode, BUSYL and BUSYR are push-pull outputs signaling contention to external devices. In SLAVE mode, they become inputs that inhibit writes when driven low. This enables depth expansion: one MASTER coordinates multiple SLAVE devices without external logic, using BUSY chaining for priority resolution in the IDT7027L25PF system.

What is the function of the semaphore feature in the IDT7027L25PF?

The IDT7027L25PF includes eight hardware semaphore flags addressed by A0–A2 and controlled via SEM pins. Each flag is written using I/O0 and read across all 16 I/O lines. With tSWRD = 5 ns minimum write-to-read latency and tSPS = 5 ns contention window, the semaphores provide atomic resource locking between ports - eliminating software spinlocks and reducing inter-processor coordination overhead in the IDT7027L25PF implementation.

Can the IDT7027L25PF operate with a 3.3 V supply?

No, the IDT7027L25PF requires a single 5.0 V ±10% supply (4.5 V to 5.5 V). Its input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and output drive strength (IOH = –4 mA, IOL = 4 mA) are specified only for 5 V operation. While some I/O pins may tolerate 3.3 V logic levels, DC characteristics including leakage current, VOL/VOH, and internal biasing are not guaranteed below VCC = 4.5 V - making 3.3 V operation unsupported for the IDT7027L25PF.