Renesas 7027L20PFGI8

Overview

IDT7027L20PFGI8 from IDT (now Renesas) is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address, 20 ns maximum access time (industrial grade), 1 mW typical standby power, and full on-chip semaphore/arbiration logic - deployed in real-time embedded systems requiring deterministic inter-processor communication, such as motor control co-processors and industrial PLC backplanes.

For engineers reviewing the IDT7027L20PFGI8 datasheet, IDT7027L20PFGI8 pinout, IDT7027L20PFGI8 application, or IDT7027L20PFGI8 equivalent, key selection considerations include its 100-pin TQFP package, master/slave cascading capability for 32-bit+ bus expansion, BUSY-flag arbitration timing (tBDD ≤ 20 ns), and industrial temperature support (–40°C to +85°C) without derating.

Technical Context

The IDT7027L20PFGI8 implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses - each port features separate CE0/CE1 enables, R/W, OE, UB/LB byte controls, and dedicated BUSY/INT flags. Its on-chip arbitration logic resolves contention via address-match detection and M/S-selectable BUSY signaling (push-pull, not open-drain).

It integrates eight hardware semaphores addressed by A0–A2, accessible only when CE = VIH and SEM = VIL, with write-to-semaphore timing tSOP = 10 ns and read-after-write latency tSWRD = 5 ns. Power management uses TTL- or CMOS-level chip enables to achieve ISB3 = 0.2 mA (full standby, CMOS inputs) and ISB1 = 50 mA (both ports TTL standby).

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm × 1.4 mm body, lead pitch 0.5 mm, RoHS-compliant and green (halogen-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC and R1EX24032AS0A, the IDT7027L20PFGI8 uniquely delivers integrated BUSY arbitration, hardware semaphores, and master/slave cascading in a single 100-pin TQFP - reducing design complexity, PCB area, and validation effort for real-time deterministic IPC.

Availability

IDT7027L20PFGI8 is available at Aetrix Electronics and suitable for industrial automation, railway signaling, and avionics applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for IDT7027L20PFGI8 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

Renesas Electronics Corporation (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

The IDT7027L20PFGI8 belongs to Renesas' legacy high-performance dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in safety-critical real-time systems.

FAQ

What is the maximum operating temperature range for the IDT7027L20PFGI8?

The IDT7027L20PFGI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all electrical parameters including 20 ns maximum access time, 0.2 mA full-standby current (ISB3), and BUSY arbitration timing (tBDD ≤ 20 ns), with no derating required within this range.

Does the IDT7027L20PFGI8 support cascading multiple devices for wider data buses?

Yes, the IDT7027L20PFGI8 supports master/slave cascading via the M/S pin and BUSY flag routing. When configured as Master (M/S = VIH), BUSY is an output used to block writes on downstream Slaves (M/S = VIL); this enables seamless 32-bit or wider memory expansion without external logic, as documented in the functional description and truth tables.

How does the semaphore functionality work on the IDT7027L20PFGI8?

The IDT7027L20PFGI8 integrates eight hardware semaphore flags addressed by A0–A2. Semaphores are accessed only when CE = VIH and SEM = VIL. Writing I/O0 to a semaphore location (tSOP = 10 ns) sets the flag; reading returns the value across all 16 I/O pins (tSWRD = 5 ns). This enables atomic resource locking between ports without software overhead.

What is the standby current consumption of the IDT7027L20PFGI8 in full-standby mode?

In full-standby mode (ISB3), where both ports are disabled with CMOS-level inputs (CE > VCC – 0.2 V, SEM > VCC – 0.2 V), the IDT7027L20PFGI8 consumes 0.2 mA typical current. This ultra-low power state is enabled by internal power-gating controlled solely by chip-enable levels, making it ideal for battery-backed or energy-sensitive industrial systems.

Is the BUSY signal on the IDT7027L20PFGI8 open-drain or push-pull?

The BUSY signal (BUSYL and BUSYR) on the IDT7027L20PFGI8 is a push-pull (totem-pole) output - not open-drain - as explicitly stated in Note 2 of the Functional Block Diagram section. This ensures fast, robust assertion/deassertion without external pull-ups and guarantees drive strength for direct connection to TTL/CMOS inputs on companion processors.