Renesas 70V27L15PF8

Overview

IDT70V27L15PF8 from Integrated Device Technology is a high-speed 3.3V 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address, 15 ns maximum read cycle time (tRC), 660 µW typical standby power, and industrial temperature support (–40°C to +85°C). It serves as a stand-alone 512-kbit memory or master/slave pair in 32-bit bus expansion systems for real-time interprocessor communication.

For engineers reviewing the IDT70V27L15PF8 datasheet, IDT70V27L15PF8 pinout, IDT70V27L15PF8 application, or IDT70V27L15PF8 equivalent, key selection criteria include port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S = VIH configuration, semaphore read/write latency (tSOP = 10 ns), and LVTTL-compatible 3.3V ±0.3V single-supply operation with full on-chip semaphore signaling support.

Technical Context

The IDT70V27L15PF8 implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses. Its on-chip arbitration logic resolves contention via address-match or chip-enable priority schemes, with BUSY outputs asserted as push-pull (not open-drain) signals when configured as Master (M/S = VIH).

It supports two distinct memory access modes: standard RAM access (CE = VIL, SEM = VIH) and semaphore flag access (CE = VIH, SEM = VIL), where eight semaphore flags are addressed by A0–A2 and written via I/O0, then read across all 16 I/O lines. The device uses CMOS high-performance fabrication and features separate upper-byte (UB) and lower-byte (LB) enables for flexible bus matching.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, with SnPb lead finish (end-of-life as of June 15, 2018).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and R1EX24032AS0C-15, the IDT70V27L15PF8 uniquely integrates full semaphore logic and dual arbitration modes (address- and CE-based), delivering out-of-the-box interprocessor synchronization without external components or firmware overhead.

Availability

IDT70V27L15PF8 is available at Aetrix Electronics and suitable for industrial PLCs, real-time signal processing subsystems, and telecom line cards requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for IDT70V27L15PF8 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, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance computing solutions.

The IDT70V27L15PF8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic interprocessor communication in industrial, telecom, and embedded systems demanding zero-software-lock synchronization.

FAQ

What is the operating voltage range for the IDT70V27L15PF8?

The IDT70V27L15PF8 operates from 3.0 V to 3.6 V (3.3 V ± 0.3 V) over its full industrial temperature range. This LVTTL-compatible supply eliminates need for level shifters in 3.3V systems and ensures stable timing margins across voltage variation. The device is not rated for 5V operation, and exceeding 3.6V may cause permanent damage per absolute maximum ratings.

How does the BUSY arbitration work in Master vs. Slave configuration for the IDT70V27L15PF8?

In Master mode (M/S = VIH), BUSYL and BUSYR are push-pull outputs that assert when address or chip-enable contention occurs; in Slave mode (M/S = VIL), they become inputs that inhibit writes when driven low by a Master. The IDT70V27L15PF8 uses tAPS = 5 ns setup time to guarantee deterministic priority, and BUSY outputs remain active until contention clears - a core feature distinguishing it from simpler dual-port SRAMs.

Can the IDT70V27L15PF8 be used for semaphore-based synchronization between two processors?

Yes - the IDT70V27L15PF8 includes full on-chip hardware semaphore logic supporting eight independent flags, accessed via A0–A2 and written to I/O0. All 16 I/O lines reflect the flag value upon read, enabling atomic test-and-set operations without CPU intervention. This capability is intrinsic to the IDT70V27L15PF8 and requires no external logic or firmware emulation.

What is the standby power consumption of the IDT70V27L15PF8 in full standby mode?

In full standby mode (ISB3), where both ports have CMOS-level inputs held at rail extremes (VIN < 0.2 V or > VDD − 0.2 V), the IDT70V27L15PF8 draws only 0.2 mA typical - equivalent to 660 µW at 3.3 V. This ultra-low power state is enabled automatically via CE0/CE1 deassertion and is validated across the full –40°C to +85°C industrial temperature range.

Is the IDT70V27L15PF8 pin-compatible with other speed grades in the IDT70V27 family?

Yes - all IDT70V27 variants, including IDT70V27L15PF8 (15 ns), IDT70V27L20PF8 (20 ns), and IDT70V27L35PF8 (35 ns), share identical 100-pin TQFP packaging, pinout, and functional mapping. Speed grade differences affect only AC timing parameters (e.g., tRC, tAA); no PCB redesign is needed when upgrading or downgrading within the family for timing margin optimization.