Renesas 7005L20PF8

Overview

7005L20PF8 from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 20 ns max read cycle time (tRC), 1 mW typical standby power, and TTL-compatible 5 V ±10% operation. It supports master/slave cascading for 16-bit+ bus expansion and is used in real-time interprocessor communication systems requiring simultaneous memory access without arbitration overhead.

For engineers reviewing the 7005L20PF8 datasheet, 7005L20PF8 pinout, 7005L20PF8 application, or 7005L20PF8 equivalent, key selection considerations include its dual-port arbitration logic, BUSY/INT semaphore signaling, battery-backed data retention at 2 V, and compatibility with industrial temperature range (−40°C to +85°C) designs.

Technical Context

The 7005L20PF8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses for left (L) and right (R) ports. On-chip arbitration logic resolves contention via BUSY flag assertion and M/S-selectable master/slave mode, enabling deterministic port priority without external logic.

It integrates full hardware semaphore support (8 flags addressed by A0–A2), interrupt flag generation (INTL/INTR), and automatic power-down via CE-controlled standby modes. The device uses CMOS process technology and supports both RAM array access (CE = L, SEM = H) and semaphore register access (CE = H, SEM = L).

Key Specifications

Pinout & Package

7005L20PF8 is housed in a 64-pin thin quad flatpack (TQFP), designated PNG64 per IDT documentation. Package dimensions are 14 mm × 14 mm × 1.4 mm. All VCC pins require connection to 5 V supply; all GND pins must be tied to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AXC and AS7C38098B-20TIN, the 7005L20PF8 uniquely delivers integrated semaphore and BUSY arbitration in a 5 V, 64-pin footprint - reducing BOM count and PCB area in real-time deterministic systems.

Availability

7005L20PF8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, digital signal processing buffering, redundant control system memory, and legacy industrial PLC expansion requiring stable component supply and long-term industrial temperature support.

Supply support for 7005L20PF8 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 semiconductor company specializing in timing, memory interface, RF, and high-performance computing solutions, now part of Renesas Electronics.

The IDT7005 family was designed specifically for deterministic, low-latency interprocessor communication in industrial, military, and telecommunications systems requiring hardware-managed dual-port memory access.

FAQ

What is the maximum operating temperature range supported by the 7005L20PF8?

The 7005L20PF8 is rated for industrial temperature operation from −40°C to +85°C. This specification is explicitly confirmed in the "Maximum Operating Temperature and Supply Voltage" table (Table 5) and applies to the 7005L20PF8 variant, which uses the 'L' low-power designation and '20' speed grade. It is not rated for commercial (0°C to +70°C) or military (−55°C to +125°C) ranges.

Does the 7005L20PF8 support battery backup operation, and what voltage is required?

Yes, the 7005L20PF8 supports battery backup with data retention down to 2.0 V (VDR = 2.0 V min), as specified in Table 9. In data retention mode, ICCDR is guaranteed ≤ 4000 µA (military/industrial) and ≤ 1500 µA (commercial), enabling reliable holdover during main power loss. The 7005L20PF8 must be operated in its low-power 'L' configuration to achieve this capability.

How does the M/S pin affect BUSY signal behavior on the 7005L20PF8?

When M/S = H, the 7005L20PF8 operates as a master: BUSYL and BUSYR are push-pull outputs that assert LOW during port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven LOW by a master device. This dual-mode behavior is defined in the Functional Block Diagram notes and Pin Names table (Table 1), and is essential for cascading multiple 7005L20PF8 devices.

Can the 7005L20PF8 perform simultaneous read operations on both ports to the same memory location?

Yes, the 7005L20PF8 supports true simultaneous reads to the same memory location on both ports - a core feature highlighted in the "Features" section. This is enabled by its true dual-ported memory cell design. No BUSY assertion occurs during concurrent reads, and valid data appears on both I/O buses within tAA (≤20 ns) of address stabilization, as confirmed in the Read Cycle Timing diagram (Figure 7).

What package type is used for the 7005L20PF8, and are there pin-compatible alternatives in different packages?

The 7005L20PF8 uses a 64-pin thin quad flatpack (TQFP), designated PNG64, with 14 mm × 14 mm body size and 1.4 mm height. While the same 7005L20 speed grade is also offered in 68-pin PLCC (PLG68) and ceramic PGA packages, these are not pin-compatible with the PNG64 variant due to differing pin counts and layouts - the 7005L20PF8's pinout is unique to the 64-pin TQFP configuration.