Renesas 7006L20JGI8

Overview

7006L20JGI8 from IDT is a high-speed 16K × 8 (128 Kbit) true dual-port static RAM with independent left/right ports, 20 ns maximum access time (industrial grade), 5 V ±10% single supply, and on-chip semaphore/arbitration logic for concurrent multi-processor memory sharing in real-time avionics data buffers.

For engineers reviewing the 7006L20JGI8 datasheet, 7006L20JGI8 pinout, 7006L20JGI8 application, or 7006L20JGI8 equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), battery-backed data retention at 2 V, BUSY/INT flag timing, master/slave cascading capability, and TQFP-64 package compatibility with PCB layout constraints for dual-bus systems.

Technical Context

The 7006L20JGI8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port-enabling simultaneous read/write to the same location only when BUSY arbitration prevents conflict. Its on-chip hardware semaphore logic uses A0–A2 to select among eight flags, with SEM enable controlling RAM vs. semaphore access modes.

Arbitration is managed via M/S pin configuration: when M/S = HIGH, BUSY is an output flag indicating port contention; when M/S = LOW, BUSY serves as input to synchronize slave writes. The device supports both CE-controlled and R/W-controlled write cycles, with tBDD (BUSY disable to valid data) up to 30 ns at 20 ns speed grade.

Key Specifications

Pinout & Package

7006L20JGI8 is housed in a 64-pin thin quad flatpack (TQFP) package, designated PNG64, with 0.5 mm lead pitch and exposed thermal pad. All VCC pins must be decoupled locally; all GND pins require low-inductance grounding to minimize noise coupling between ports.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AXC and IDT70V27L20PF, the 7006L20JGI8 offers direct 5 V TTL compatibility, compact 64-pin TQFP packaging, and proven M/S-configurable BUSY arbitration-making it optimal for retrofitting legacy industrial and avionics platforms without voltage or layout changes.

Availability

7006L20JGI8 is available at Aetrix Electronics and suitable for avionics flight data buffering, industrial PLC memory coherency, and railway signaling interlocking requiring stable component supply across extended product lifecycles.

Supply support for 7006L20JGI8 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 for communications, computing, and industrial markets.

The 7006L20JGI8 belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, contention-free memory sharing in real-time multi-processor systems operating in harsh environmental conditions.

FAQ

What is the guaranteed maximum access time for the 7006L20JGI8 under industrial temperature conditions?

The 7006L20JGI8 guarantees a maximum access time (tAA) of 20 ns over the full industrial temperature range of –40°C to +85°C, as specified in the AC Electrical Characteristics table for the "7006X20" speed grade. This value applies to both left and right ports under VCC = 5.0 V ±10% and includes margin for worst-case process, voltage, and temperature variation.

Does the 7006L20JGI8 support battery backup operation, and what is the minimum retention voltage?

Yes, the 7006L20JGI8 supports battery backup operation with guaranteed data retention down to 2.0 V (VDR), as confirmed in the Data Retention Characteristics table. At this voltage, typical standby current is 100 µA, enabling long-term state preservation during main power failure-critical for avionics and industrial safety systems.

How does the M/S pin configure BUSY functionality on the 7006L20JGI8?

When M/S = HIGH, the 7006L20JGI8 operates as a master: BUSYL and BUSYR become push-pull outputs that assert during port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs used to synchronize writes with a master device-enabling hardware-controlled daisy-chained arbitration without external logic.

Can the 7006L20JGI8 be used in a 16-bit data bus configuration, and how is this achieved?

Yes, the 7006L20JGI8 supports 16-bit expansion via master/slave cascading. Two devices are connected with M/S = HIGH on one (master) and M/S = LOW on the other (slave); the master's BUSY output drives the slave's BUSY input, while data buses are combined externally. This avoids external arbitration logic and maintains full-speed operation as documented in the IDT7006 functional description.

What are the key differences between the 'S' and 'L' versions of the 7006 series, and which applies to 7006L20JGI8?

The 'L' suffix in 7006L20JGI8 denotes the low-power variant: active power is 700 mW (typ) vs. 750 mW for 'S', and standby drops to 1 mW (typ) vs. 5 mW-enabling battery backup with 2 V retention. Both share identical timing, pinout, and functionality; the 'L' version is optimized for energy-constrained industrial and aerospace applications.