Renesas 7027L15PF

Overview

7027L15PF from IDT is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same memory location, 15 ns maximum access time (commercial grade), 1 mW typical standby power, and full on-chip semaphore and arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7027L15PF datasheet, 7027L15PF pinout, 7027L15PF application, or 7027L15PF equivalent, this device supports master/slave cascading for 32-bit+ bus expansion, provides push-pull BUSY/INT flags, and delivers asynchronous dual-port operation with separate address/control/I/O per port - critical for lock-free shared memory in DSP, network packet processors, and industrial motion controllers.

Technical Context

The 7027L15PF implements fully asynchronous dual-port architecture with independent left/right ports, each featuring dedicated CE0/CE1, R/W, OE, UB/LB, and A0–A14 lines. Its on-chip arbitration logic resolves contention via address-match or chip-enable timing, asserting BUSY outputs (M/S = VIH) or accepting BUSY inputs (M/S = VIL) to block conflicting writes.

It integrates eight hardware semaphores addressed by A0–A2, writable via I/O0 and readable across all 16 I/Os, with tSPS = 5 ns contention window and tSWRD = 5 ns write-to-read latency - enabling deterministic mutual exclusion between heterogeneous processors without external logic.

Key Specifications

Pinout & Package

7027L15PF is housed in a 100-pin TQFP package (body size ≈ 14 mm × 14 mm × 1.4 mm) with 4×25 pin grid, requiring all VCC and GND pins to be connected per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IDT70V27L15PF, the 7027L15PF offers native 5 V operation with proven reliability in legacy telecom and instrumentation, while its 100-pin TQFP footprint and 15 ns timing provide direct drop-in compatibility where voltage and thermal constraints permit.

Availability

7027L15PF is available at Aetrix Electronics and suitable for real-time DSP co-processing, industrial motion control, network packet buffering, and test equipment data capture requiring stable component supply and long-term obsolescence management.

Supply support for 7027L15PF 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 high-performance silicon solutions for communications, computing, and industrial markets.

The 7027L15PF belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic inter-processor communication in hard real-time embedded systems where lock-free shared memory and hardware arbitration are mandatory.

FAQ

What is the maximum operating frequency supported by the 7027L15PF?

The 7027L15PF does not operate on a clock; it is fully asynchronous. Its 15 ns maximum access time (tAA) supports effective random-access throughput up to 66.7 MHz in systems with matched timing margins. Actual system bandwidth depends on bus protocol, CE/R/W setup/hold times, and external driver strength - not a fixed clock frequency.

Does the 7027L15PF support true simultaneous read/write to the same memory address?

Yes, the 7027L15PF uses true dual-ported memory cells that allow simultaneous read and write operations to the same address location. When contention occurs, on-chip arbitration asserts BUSY to block the later write, preserving data integrity without external logic - a core architectural feature confirmed in the functional block diagram and Truth Table V.

How is semaphore functionality implemented in the 7027L15PF?

The 7027L15PF implements eight hardware semaphore flags accessed via A0–A2 when CE = VIH and SEM = VIL. Each flag is written using I/O0 and read across all 16 I/O lines. The tSPS = 5 ns contention window and tSWRD = 5 ns write-to-read latency ensure deterministic, low-overhead mutual exclusion between ports - verified in Truth Tables III and VI.

Can the 7027L15PF be used in master/slave configurations for 32-bit bus expansion?

Yes, the 7027L15PF supports master/slave cascading via the M/S pin. When M/S = VIH, BUSY is an output flag used to coordinate depth expansion; when M/S = VIL, BUSY becomes an input that inhibits writes during contention. This enables seamless 32-bit+ word systems without discrete glue logic, as documented in the Functional Description and Pin Configurations sections.

What are the power consumption characteristics of the 7027L15PF in standby mode?

In full standby (ISB3), with both ports inactive and all inputs at CMOS levels, the 7027L15PF draws only 1 mW typical (0.2 mA at 5 V). With one port active and the other in TTL-level standby (ISB2), it consumes 100 mA typical - values confirmed in Table 10a and consistent with the "IDT7027L Active: 750mW (typ.), Standby: 1mW (typ.)" specification in the Features section.