Renesas 7027L25PFI

Overview

IDT7027L25PFI 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, TTL-compatible 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It serves as a stand-alone 512 Kbit dual-port RAM or master/slave pair in 32-bit-or-wider memory systems for real-time interprocessor communication.

For engineers reviewing the IDT7027L25PFI datasheet, IDT7027L25PFI pinout, IDT7027L25PFI application, or IDT7027L25PFI equivalent, key selection considerations include bus-matching byte controls (UBL/LBL), on-chip semaphore arbitration, BUSY flag timing under M/S = VIH/VIL configurations, and dual CE0/CE1-controlled power-down modes for low-power embedded control subsystems.

Technical Context

The IDT7027L25PFI implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves contention via address-match or chip-enable-driven BUSY assertion, with tBDD ≤ 25 ns (M/S = VIH) ensuring deterministic port-to-port data validity delay.

It supports semaphore signaling across eight flags addressed by A0–A2, accessed only when CE = VIH and SEM = VIL, with tSWRD = 5 ns minimum write-to-read latency. Interrupt flags (INTL/INTR) are set/cleared by writes to dedicated addresses (7FFEh/7FFFh), requiring no external logic for mailbox coordination between co-located processors.

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 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 CY7C028V-25AXC and AS7C33256B-25JCIN, the IDT7027L25PFI uniquely delivers integrated BUSY arbitration, semaphore registers, and 5 V native operation-enabling drop-in replacement in legacy industrial designs without voltage translation or arbitration firmware.

Availability

IDT7027L25PFI is available at Aetrix Electronics and suitable for industrial PLC communication modules, real-time motion controllers, avionics data concentrators, medical imaging subsystems, and embedded test equipment requiring stable component supply across extended product lifecycles.

Supply support for IDT7027L25PFI 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) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019. IDT delivered high-performance analog and digital ICs for communications, computing, and industrial markets.

The IDT7027L25PFI belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic interprocessor communication in real-time embedded systems where hardware-enforced arbitration, low standby power, and 5 V compatibility are mandatory.

FAQ

What is the maximum access time specification for the IDT7027L25PFI?

The IDT7027L25PFI has a maximum access time of 25 ns across the full industrial temperature range (–40°C to +85°C) under specified VCC = 5.0 V ±10% and load conditions. This value applies to both address access (tAA) and chip-enable access (tACE), ensuring deterministic timing for real-time control loops and high-speed data exchange between co-located processors.

How does the BUSY arbitration mechanism work in the IDT7027L25PFI?

The IDT7027L25PFI implements BUSY arbitration via address-match detection or chip-enable timing. When M/S = VIH (master), BUSY outputs assert to block conflicting writes; when M/S = VIL (slave), BUSY inputs inhibit writes. The tBDD parameter (≤25 ns) defines the delay from BUSY deassertion to valid read data, ensuring deterministic resolution of port-to-port contention without software intervention.

Can the IDT7027L25PFI operate with a 3.3 V supply?

No, the IDT7027L25PFI requires a nominal 5.0 V ±10% supply (4.5 V to 5.5 V) and is not rated for 3.3 V operation. Its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive characteristics are optimized for TTL-compatible 5 V logic families. For 3.3 V systems, consider alternatives like CY7C028V-25AXC with 5 V-tolerant I/O.

What is the purpose of the M/S pin on the IDT7027L25PFI?

The M/S (Master/Slave Select) pin configures BUSY signal behavior: when driven high (VIH), BUSY pins function as push-pull outputs for arbitration-master operation; when driven low (VIL), they become inputs for slave-mode wait-state synchronization. This enables flexible cascading-multiple IDT7027L25PFI devices can be combined into wider memory systems without external logic.

Does the IDT7027L25PFI support byte-level write operations?

Yes, the IDT7027L25PFI supports independent upper-byte (I/O8–I/O15) and lower-byte (I/O0–I/O7) writes via UBL/UBR and LBL/LBR control signals. This enables precise 8-bit data transfers to match legacy peripherals or mixed-width system buses, eliminating the need for read-modify-write cycles when updating partial words.