Renesas 7005L20PFGI8

Overview

IDT7005L20PFGI8 from Integrated Device Technology (IDT) is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 20 ns max read cycle time, industrial temperature range (−40°C to +85°C), and 5 V ±10% single-supply operation. It enables simultaneous asynchronous reads/writes to shared memory in real-time inter-processor communication systems such as motion control PLCs and radar signal processors.

For engineers reviewing the IDT7005L20PFGI8 datasheet, IDT7005L20PFGI8 pinout, IDT7005L20PFGI8 application, or IDT7005L20PFGI8 equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 30 ns), semaphore flag support (8 flags via A0–A2), low standby current (1 mA typ.), and TQFP-64 package compatibility with PCB layout for multi-processor coherency.

Technical Context

The IDT7005L20PFGI8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O7L/R/WL/CEL/OEL on left; mirrored on right). On-chip arbitration logic resolves contention using either chip-enable (CE)-driven or address-match-driven BUSY assertion, with M/S pin selecting master (BUSY output) or slave (BUSY input) mode.

It integrates full hardware semaphore signaling (SEML/SEMR) for inter-port synchronization, interrupt flag generation (INTL/INTR) triggered by writes to dedicated addresses (e.g., 1FFF_H), and automatic power-down via CE-controlled standby modes-achieving 1 mA typical standby current at 5 V while retaining data down to 2 V.

Key Specifications

Pinout & Package

64-pin thin quad flatpack (TQFP) package with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VCC pins require local decoupling; all GND pins must be connected to solid ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC and R1EX24064ASAS-20, the IDT7005L20PFGI8 delivers integrated arbitration, semaphore, and interrupt features in a compact TQFP-64 package-reducing BOM count and PCB area while guaranteeing deterministic inter-processor timing.

Availability

IDT7005L20PFGI8 is available at Aetrix Electronics and suitable for industrial motion controllers, avionics display systems, and medical imaging data pipelines requiring stable component supply across extended product lifecycles.

Supply support for IDT7005L20PFGI8 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, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT7005L20PFGI8 belongs to IDT's legacy dual-port SRAM family, engineered specifically for deterministic real-time inter-processor communication in safety-critical and high-reliability embedded systems.

FAQ

What is the maximum operating frequency supported by the IDT7005L20PFGI8?

The IDT7005L20PFGI8 has a maximum read cycle time (tRC) of 20 ns, enabling reliable operation at up to 50 MHz for each port independently. This specification applies across the full industrial temperature range (−40°C to +85°C) and 5.0 V ±10% supply voltage. The device does not require clock input-it operates asynchronously, so actual throughput depends on address/data setup/hold timing rather than a fixed clock rate. For sustained dual-port bandwidth, both ports can achieve concurrent 50 MB/s data transfer under optimal timing conditions.

How does the BUSY arbitration mechanism work in the IDT7005L20PFGI8?

In the IDT7005L20PFGI8, BUSY arbitration resolves port contention using either chip-enable (CE)-driven or address-match-driven detection. When M/S = H (master), BUSYL/BUSYR are outputs that go low when the opposite port initiates a conflicting access. When M/S = L (slave), BUSYL/BUSYR become inputs that inhibit writes if driven low by a master. The tAPS (arbitration priority setup) parameter of 5 ns ensures deterministic resolution-failure to meet tAPS may result in undefined BUSY assertion, but both BUSY signals will never be low simultaneously.

Can the IDT7005L20PFGI8 retain data during power loss?

Yes-the IDT7005L20PFGI8 supports battery backup operation with guaranteed data retention down to 2.0 V (VDR). In data retention mode, with CE held high and VCC reduced to 2 V, the device draws only 100 µA typical (up to 4 mA max) while preserving all 64 Kbits. This capability is intrinsic to the "L" (low-power) variant and is validated across military and industrial temperature ranges. No external circuitry is needed beyond a 2 V backup source connected to VCC.

What are the key differences between the IDT7005L20PFGI8 and the commercial-grade IDT7005S20PFGI8?

The IDT7005L20PFGI8 and IDT7005S20PFGI8 share identical speed grade (20 ns), pinout, and functionality-but differ in power profile and temperature qualification. The "L" version consumes 700 mW typical active power and 1 mW standby, enabling battery backup; the "S" version draws 750 mW active and 5 mW standby. Only the "L" variant is specified for industrial temperature (−40°C to +85°C); the "S" grade is commercial (0°C to +70°C) unless otherwise ordered. Both use the same 64-pin TQFP package.

Does the IDT7005L20PFGI8 support hardware semaphore operations, and how are they implemented?

Yes-the IDT7005L20PFGI8 includes eight dedicated hardware semaphore flags accessed via SEML/SEMR enable and A0–A2 address lines. Writing to I/O0 sets a flag; reading from I/O0–I/O7 returns the flag state. Semaphore operations are atomic and independent of main memory access-no contention occurs between semaphore and RAM reads/writes. The tSOP (semaphore update pulse) is 10 ns, and tSAA (semaphore address access) is 20 ns max, ensuring fast inter-processor synchronization without software overhead.