Renesas 7006L55PFI

Overview

7006L55PFI from IDT is a high-speed 16K × 8 dual-port static RAM with true independent left/right port access, 55 ns maximum read cycle time, 2 V battery backup data retention, and industrial temperature range (–40°C to +85°C). It implements on-chip semaphore logic and BUSY arbitration for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 7006L55PFI datasheet, 7006L55PFI pinout, 7006L55PFI application, or 7006L55PFI equivalent, this device supports simultaneous asynchronous reads/writes across ports, requires no external arbitration logic, delivers 1 mW typical standby power, and enables 16-bit+ bus expansion via MASTER/SLAVE cascading - critical for deterministic multi-CPU memory sharing.

Technical Context

The 7006L55PFI uses fully asynchronous dual-port architecture with separate address, control, and I/O pins per port, enabling concurrent access without clock synchronization. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports semaphore signaling through dedicated SEM pins and A0–A2 address decoding.

It operates at 5.0 V ±10% with TTL-compatible inputs and outputs, includes automatic power-down via CE control, and guarantees 2 V data retention during battery backup mode. The device implements both CE-controlled and R/W-controlled write timing, with tBDD ≤30 ns for port-to-port read-after-write validity under BUSY arbitration.

Key Specifications

Pinout & Package

7006L55PFI is housed in a 68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68), body size ≈0.95 in × 0.95 in × 0.17 in, with all VCC and GND pins requiring direct connection to respective supply planes per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-55AXC and AS7C316000PFSIG, the 7006L55PFI uniquely integrates BUSY arbitration, semaphore logic, and 2 V data retention in a 5 V, 68-pin PLCC package - making it irreplaceable for legacy industrial and avionics designs requiring zero-additional-logic dual-port operation.

Availability

7006L55PFI is available at Aetrix Electronics and suitable for industrial PLCs, avionics subsystems, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7006L55PFI 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 high-performance timing, memory, and interface solutions, now part of Renesas Electronics.

The 7006L55PFI belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic real-time inter-processor communication in military, industrial, and aerospace systems demanding hardware arbitration and battery backup.

FAQ

What is the operating temperature range for the 7006L55PFI?

The 7006L55PFI is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the "Maximum Operating Temperature and Supply Voltage" table and "DC Electrical Characteristics" section of the official datasheet. This range applies to all speed grades including the 55 ns variant, and is validated across the full 4.5 V to 5.5 V supply range.

Does the 7006L55PFI support battery backup data retention?

Yes, the 7006L55PFI supports data retention down to 2.0 V (VDR = 2.0 V), as specified in Table 9 ("Data Retention Characteristics"). In retention mode, ICCDR is ≤4000 µA for military/industrial grades, enabling reliable operation from a single backup cell without external regulation - a defining feature of the "L" (low-power) variant.

How does the M/S pin configure master/slave operation in the 7006L55PFI?

When M/S = HIGH, the 7006L55PFI operates as Master: BUSYL and BUSYR become push-pull outputs asserting contention status. When M/S = LOW, it operates as Slave: BUSYL and BUSYR become inputs accepting BUSY signals from a Master device. This configuration enables seamless cascading for >8-bit bus widths without external logic, as detailed in the Functional Block Diagram and Pin Names table.

What is the purpose of the SEM pins on the 7006L55PFI?

The SEML and SEMR pins enable access to eight dedicated hardware semaphore flags. When SEM = LOW and CE = HIGH, the device enters semaphore mode; A0–A2 select one of eight flags, and I/O0–I/O7 read/write the flag state. This provides atomic, lock-free resource sharing between processors - a key differentiator from standard SRAMs and explicitly documented in Truth Table II and the Semaphore section.

Is the 7006L55PFI pin-compatible with other speed grades in the 7006L family?

Yes, all 7006L variants (including 7006L15PFI, 7006L20PFI, and 7006L55PFI) share identical 68-pin PLCC pinout, electrical interface, and functional architecture. Speed grade differences affect only AC timing parameters (e.g., tRC, tAA); DC characteristics, pin functions, and package dimensions remain consistent - enabling drop-in replacement within the same temperature grade and package type.