Renesas 7027S20PF8

Overview

7027S20PF8 from IDT (now Renesas) 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, 20 ns maximum access time (industrial grade), 5 V ±10% single-supply operation, and on-chip semaphore/arbiter logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7027S20PF8 datasheet, 7027S20PF8 pinout, 7027S20PF8 application, or 7027S20PF8 equivalent, key selection considerations include bus-matching byte controls (UBL/LBL), master/slave BUSY arbitration timing (tBAA ≤20 ns), TTL-compatible I/O, industrial temperature range (–40°C to +85°C), and TQFP-100 packaging for space-constrained board layouts.

Technical Context

The 7027S20PF8 implements fully asynchronous dual-port architecture with independent left/right address, control, and 16-bit bidirectional I/O buses. Its on-chip arbitration logic resolves port contention via address-match or chip-enable-driven BUSY assertion, with tAPS = 5 ns priority setup time ensuring deterministic resolution.

It supports semaphore signaling across ports using dedicated SEM pins and A0–A2 addressing of eight shared flags, and provides interrupt generation via dedicated INTL/INTR outputs triggered by writes to fixed mailbox addresses (7FFE_H/7FFF_H), all without external logic.

Key Specifications

Pinout & Package

7027S20PF8 is housed in a 100-pin TQFP (Thin Quad Flatpack) package with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VCC and GND pins must be connected per datasheet layout guidelines to ensure signal integrity and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AXC, 7027S20PF8 delivers hardware semaphore and interrupt support in-package, reducing BOM count and firmware complexity; versus 70V27L20PF8, it achieves lower full-standby current at the cost of marginally higher active power-ideal for intermittently active industrial nodes.

Availability

7027S20PF8 is available at Aetrix Electronics and suitable for industrial PLC communication modules, avionics flight control systems, and radar signal processing subsystems requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial temperature performance.

Supply support for 7027S20PF8 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), now part of Renesas Electronics, designs high-performance timing, memory, and interface solutions for mission-critical embedded systems.

The 7027S20PF8 belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time industrial, aerospace, and medical applications demanding hardware-enforced concurrency control.

FAQ

What is the operating voltage range for the 7027S20PF8?

The 7027S20PF8 operates from 4.5 V to 5.5 V (5.0 V ±10%), with all DC and AC specifications guaranteed across this range at industrial temperatures. It is not rated for 3.3 V operation, and applying voltages outside this window may cause functional failure or permanent damage per Absolute Maximum Ratings.

Does the 7027S20PF8 support true simultaneous read/write to the same address?

Yes, the 7027S20PF8 uses true dual-ported memory cells that allow independent, concurrent read and write operations to the exact same memory location-one port reading while the other writes-without data corruption or arbitration delay.

How does the BUSY arbitration work on the 7027S20PF8?

When configured as master (M/S = VIH), the 7027S20PF8 asserts BUSYL/BUSYR outputs upon address or chip-enable match between ports. The tAPS = 5 ns arbitration priority setup time ensures deterministic resolution, and tBDD ≤20 ns guarantees valid data after BUSY deassertion-critical for real-time synchronization.

Can the 7027S20PF8 be used in a 32-bit data bus configuration?

Yes, the 7027S20PF8 supports 32-bit expansion via Master/Slave cascading: two devices operate in tandem with M/S = VIH (master) and M/S = VIL (slave), using BUSY handshake to coordinate access-no external logic required per the IDT MASTER/SLAVE Dual-Port RAM approach.

What is the purpose of the SEM pins on the 7027S20PF8?

The SEML and SEMR pins enable semaphore mode: when asserted (SEM = VIL), the device accesses eight hardware semaphore flags instead of RAM, addressed by A0–A2 and written via I/O0. This provides lock-free, atomic resource sharing between processors without software intervention.