Renesas 7027S20PF

Overview

7027S20PF from IDT (Integrated Device Technology) is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same memory location, 20 ns maximum access time (industrial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore logic for inter-port synchronization - deployed in real-time embedded systems requiring deterministic data exchange between independent processors or bus masters.

For engineers reviewing the 7027S20PF datasheet, 7027S20PF pinout, 7027S20PF application, or 7027S20PF equivalent, this page delivers verified timing parameters, validated master/slave arbitration behavior, confirmed TQFP-100 package mapping, and two field-tested alternative parts with documented functional trade-offs for memory coherency-critical designs.

Technical Context

The 7027S20PF implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses - each port supports read/write cycles without internal clocking. Its hardware arbitration logic resolves contention via BUSY flag assertion based on address match or chip-enable timing, with priority determined by tAPS (5 ns setup) and tBDD (20 ns disable-to-valid-data delay).

On-chip semaphore signaling uses dedicated SEM pins and A0–A2 addressing to manage eight shared flags across ports; interrupt generation is triggered by writes to fixed mailbox addresses (7FFE_H/7FFF_H), with INTL/INTR outputs asserted as non-tri-state totem-pole signals - all operating within –40°C to +85°C industrial temperature range.

Key Specifications

Pinout & Package

7027S20PF is packaged in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VCC and GND pins must be connected per datasheet note; NC pins are internally unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AXC and AS7C33256P-20TIN, the 7027S20PF uniquely integrates hardware arbitration, semaphore logic, and industrial temperature rating in a single TQFP-100 package - reducing system-level complexity and qualification effort for safety-critical embedded memory applications.

Availability

7027S20PF is available at Aetrix Electronics and suitable for real-time motor control, avionics data exchange, industrial PLC backplane, and medical imaging pipeline applications requiring stable component supply and long-term industrial-grade reliability.

Supply support for 7027S20PF 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 sensor solutions, now part of Renesas Electronics since 2019.

The IDT7027 family was designed specifically for deterministic inter-processor communication in hard real-time systems - emphasizing hardware-enforced memory coherency, low-latency arbitration, and industrial environmental resilience.

FAQ

What is the maximum operating temperature range for the 7027S20PF?

7027S20PF is rated for industrial temperature operation from –40°C to +85°C, verified across all electrical parameters including 20 ns access time, standby current, and BUSY arbitration timing - making it suitable for under-hood automotive and factory-floor industrial deployments where ambient thermal stress exceeds commercial-grade limits.

Does the 7027S20PF require an external clock signal?

No, the 7027S20PF operates asynchronously - no clock input is required. All timing is controlled by address, chip-enable, and read/write strobes. This eliminates clock distribution challenges and jitter sensitivity in multi-domain systems, and is explicitly confirmed in the Functional Description section of the datasheet.

How does the 7027S20PF handle memory contention between ports?

The 7027S20PF resolves contention using hardware arbitration: when both ports access the same address, the BUSY flag asserts on the later-arriving port. Priority is determined by tAPS (5 ns setup time) and tBDD (20 ns disable-to-valid-data delay). The 7027S20PF datasheet confirms this behavior in Truth Table V and Timing Waveform 11.

Can the 7027S20PF be used in a 32-bit data bus configuration?

Yes - the 7027S20PF supports 32-bit expansion via Master/Slave cascading. When configured as Master (M/S = VIH), BUSY output coordinates with Slave devices; when configured as Slave (M/S = VIL), BUSY input synchronizes write operations. This capability is documented in the "IDT MASTER/SLAVE Dual-Port RAM approach" section of the 7027S20PF datasheet.

What is the function of the SEM pin on the 7027S20PF?

The SEM pin on the 7027S20PF enables semaphore register access mode: when CE = VIH and SEM = VIL, the device routes I/O0–I/O15 to eight on-chip semaphore flags addressed by A0–A2. This provides atomic resource locking without CPU intervention - a feature confirmed in Truth Table III and Functional Description section of the 7027S20PF datasheet.