Renesas 7005L17G

Overview

7005L17G from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 17 ns maximum read cycle time (tRC), 2V data retention capability, and integrated hardware semaphore/arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7005L17G datasheet, 7005L17G pinout, 7005L17G application, or 7005L17G equivalent, this device supports simultaneous asynchronous reads/writes across ports, provides BUSY/INT/SEM signaling for contention management, and delivers low active power (700 mW typ.) and ultra-low standby current (1 mW typ.) - critical for battery-backed industrial controllers and military-grade avionics memory subsystems.

Technical Context

The 7005L17G implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port (A0L–A12L/I/O0L–I/O7L and A0R–A12R/I/O0R–I/O7R), enabling concurrent memory access without external arbitration logic. Its on-chip arbitration resolves port conflicts via BUSY flag assertion (M/S = H) or BUSY input (M/S = L), with tAPS = 5 ns priority setup time.

It supports two distinct memory access modes: standard RAM operation (CE = VIL, SEM = VIH) and semaphore register access (CE = VIH, SEM = VIL), where eight semaphore flags are addressed by A0–A2 and read/written via I/O0–I/O7. The device operates at 5.0 V ±10% with TTL-compatible inputs and push-pull BUSY/INT outputs.

Key Specifications

Pinout & Package

7005L17G is housed in a 64-pin thin quad flatpack (TQFP) package with 0.5 mm pitch, compliant with JEDEC MO-159. All VCC pins require decoupling; all GND pins must be connected to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1371DV33-167AXC and IDT70V27L15PF, the 7005L17G uniquely combines 5V TTL compatibility, 2V data retention, and M/S-configurable cascading - making it irreplaceable in legacy industrial and military 5V dual-CPU systems where voltage, timing, and pinout constraints are fixed.

Availability

7005L17G is available at Aetrix Electronics and suitable for industrial PLC memory buffers, military avionics data exchange, telecom baseband processor cache, medical imaging frame buffers, and real-time embedded control systems requiring stable component supply across extended product lifecycles.

Supply support for 7005L17G 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, and RF solutions, now part of Renesas Electronics since 2019.

The IDT7005 family was designed specifically for high-reliability dual-processor systems requiring deterministic memory coherency, hardware-based arbitration, and battery-backed operation - targeting aerospace, defense, and industrial automation markets.

FAQ

What is the maximum operating frequency supported by the 7005L17G?

The 7005L17G supports a maximum read cycle time (tRC) of 17 ns, corresponding to a theoretical maximum operating frequency of 58.8 MHz for continuous read operations. This value is guaranteed across the industrial temperature range (–40°C to +85°C) and applies to both ports independently. Write cycle timing follows tWC = 17 ns, and actual system throughput depends on address/data setup/hold requirements and BUSY arbitration overhead.

Does the 7005L17G support battery backup operation, and what voltage is required?

Yes, the 7005L17G supports battery backup operation with guaranteed data retention down to 2.0 V (VDR = 2.0 V). In data retention mode, ICCDR is specified at ≤4000 µA (military/industrial) and ≤1500 µA (commercial), enabling long-term retention from a single 2V lithium cell. The device automatically enters retention mode when VCC drops below the threshold while CE remains asserted.

How does the Master/Slave (M/S) pin affect BUSY signal behavior in the 7005L17G?

When M/S = H, the 7005L17G operates as a master: BUSYL and BUSYR are push-pull outputs that assert LOW to block writes during port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs, and external BUSY signals from a master device inhibit local writes. This configuration enables scalable multi-port memory systems without external logic.

Can the 7005L17G perform simultaneous read operations on both ports to the same memory address?

Yes, the 7005L17G features true dual-port memory cells that allow simultaneous reads from both ports to the exact same address location without contention, latency penalty, or data corruption. This capability is fundamental to its architecture and is explicitly confirmed in the datasheet's "Features" section - unlike pseudo-dual-port devices that serialize such accesses.

What are the key differences between the 'S' and 'L' versions of the IDT7005 family, as seen in 7005L17G?

The 'L' suffix in 7005L17G denotes the low-power variant: active power is 700 mW (typ.) vs. 750 mW (typ.) for 'S', and standby power is 1 mW (typ.) vs. 5 mW (typ.). Crucially, only 'L' versions guarantee 2V data retention - a defining feature for battery-backed applications. Both share identical timing (17 ns), pinout, and functionality; the 'L' version optimizes for energy-constrained deployments.