Renesas 7006L55PFI8

Overview

7006L55PFI8 from IDT is a high-speed 16K × 8 (128 Kbit) dual-port static RAM with true independent left/right port access, 55 ns maximum read cycle time, 2 V data retention capability, and industrial temperature range (–40°C to +85°C). It supports simultaneous reads of the same memory location and is used in real-time inter-processor communication systems requiring deterministic arbitration.

For engineers reviewing the 7006L55PFI8 datasheet, 7006L55PFI8 pinout, 7006L55PFI8 application, or 7006L55PFI8 equivalent, key selection criteria include BUSY/INT flag timing, semaphore arbitration latency, CE-controlled power-down behavior, and compatibility with 5 V ±10% TTL-level control interfaces in dual-CPU or FPGA-to-ASIC bridging architectures.

Technical Context

The 7006L55PFI8 implements fully asynchronous dual-port operation with on-chip arbitration logic that resolves contention via hardware BUSY flag assertion-either address-match or CE-driven-without external logic. Its semaphore subsystem uses A0–A2 to select among eight independent flags, each readable/writable through I/O0–I/O7 under SEM = VIL.

It features two independent 14-bit address buses (A0L–A13L / A0R–A13R), separate chip enable (CEL/CER), read/write (R/WL/R/WR), and output enable (OEL/OER) controls per port, plus dedicated INTL/INTR and BUSYL/BUSYR signals. The M/S pin configures master (BUSY output) or slave (BUSY input) mode for cascaded 16-bit+ bus expansion.

Key Specifications

Pinout & Package

7006L55PFI8 is packaged in a 64-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, with all VCC and GND pins distributed across four sides for low-inductance power delivery and noise suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-55AXC and IS61LV25616AL-10TLI, the 7006L55PFI8 uniquely integrates arbitration, semaphore, and interrupt logic in a 5 V, industrial-grade package-reducing BOM count and eliminating timing-critical software synchronization in safety- or latency-sensitive systems.

Availability

7006L55PFI8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, FPGA-to-microcontroller bridging, and industrial motion control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 7006L55PFI8 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.

The 7006L55PFI8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in industrial, military, and telecom infrastructure equipment.

FAQ

What is the maximum operating temperature range for the 7006L55PFI8?

The 7006L55PFI8 is rated for industrial temperature operation from –40°C to +85°C. This range is validated across all AC and DC specifications including 55 ns access time, 2 V data retention, and BUSY arbitration timing. No derating is required within this envelope, making it suitable for enclosed industrial controllers and outdoor base station equipment.

Does the 7006L55PFI8 support battery backup, and what voltage is required?

Yes, the 7006L55PFI8 supports battery backup with verified data retention at VCC = 2.0 V minimum. In data retention mode (CE > VHC, VIN > VHC or < VLC), typical ICCDR is 100 µA, and maximum is 4000 µA across military and industrial grades. The device retains full 128 Kbit content without corruption during main power loss.

How does the M/S pin affect BUSY signal behavior on the 7006L55PFI8?

When M/S = VIH, the 7006L55PFI8 operates as a master: BUSYL and BUSYR are push-pull outputs that assert during arbitration contention. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs, allowing external BUSY signals from a master device to gate writes-enabling hierarchical multi-device memory expansion without additional logic.

Can both ports of the 7006L55PFI8 perform simultaneous reads to the same memory address?

Yes, the 7006L55PFI8 supports true simultaneous reads of the same memory location from left and right ports. This is enabled by its dual-ported memory cell architecture and requires no arbitration or BUSY assertion. Both ports deliver valid data within their respective tAA (address access) timing-55 ns max-without interference or timing penalties.

What is the function of the SEM pin, and how is it used in semaphore operations?

The SEM pin (SEML on left port, SEMR on right port) selects between RAM access (SEM = VIH) and semaphore register access (SEM = VIL). When SEM = VIL, A0–A2 address one of eight semaphore flags, and I/O0–I/O7 read/write the flag state. This hardware-mapped semaphore system enables atomic test-and-set operations without CPU intervention or software locks.