Renesas 7005S20G

Overview

7005S20G from IDT is a high-speed 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 20 ns max access time (commercial/industrial), TTL-compatible 5V ±10% supply, and on-chip semaphore/arbitration logic for inter-port synchronization - used in real-time embedded systems requiring concurrent CPU/DSP memory access.

For engineers reviewing the 7005S20G datasheet, 7005S20G pinout, 7005S20G application, or 7005S20G equivalent, this page delivers verified timing specs (tRC = 20 ns), power metrics (750 mW active, 5 mW standby), dual-port arbitration behavior, BUSY/INT signal roles, and exact TQFP-64 pin mapping per IDT documentation.

Technical Context

The 7005S20G implements fully asynchronous dual-port operation: each port (left/right) has dedicated address (A0L–A12L / A0R–A12R), data (I/O0L–I/O7L / I/O0R–I/O7R), and control lines (CEL/CER, R/WL/R/WR, OEL/OER), enabling simultaneous read/write to same or different addresses. Port arbitration uses hardware BUSY flag generation (M/S = H) or BUSY input (M/S = L) with tAPS = 5 ns priority setup.

It integrates full semaphore logic (SEML/SEMR, eight flags addressed via A0–A2), interrupt flag support (INTL/INTR), and automatic power-down via CE assertion. Data retention at 2V (L-version only) is not applicable to 7005S20G, which is the standard-power S variant rated for commercial/industrial temperature range (–40°C to +85°C).

Key Specifications

Pinout & Package

7005S20G is packaged in a 64-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green-part qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-20AXC and AS7C38098B-20TIN, the 7005S20G uniquely integrates semaphore, interrupt, and BUSY arbitration logic in an 8-bit, 64-pin footprint - delivering full multi-processor memory coherency without external components.

Availability

7005S20G is available at Aetrix Electronics and suitable for industrial PLCs, real-time DSP interfaces, avionics data hubs, and medical imaging systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7005S20G 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 sensor solutions, now part of Renesas Electronics.

The 7005S20G belongs to IDT's high-speed dual-port SRAM product line, designed specifically for real-time embedded systems requiring deterministic, contention-free memory access between heterogeneous processors.

FAQ

What is the maximum operating frequency supported by the 7005S20G?

The 7005S20G does not operate at a fixed clock frequency; it is an asynchronous SRAM. Its performance is defined by timing parameters: maximum read cycle time (tRC) is 20 ns, enabling effective throughput up to 50 MHz in burst-read scenarios. Actual system speed depends on address/data setup/hold times and controller timing margins - not a synchronous clock domain.

Does the 7005S20G support battery backup for data retention?

No, the 7005S20G is the standard-power 'S' variant and does not support battery backup. Data retention at 2V is exclusive to the 'L' version (e.g., 7005L20G). The 7005S20G requires continuous 5V ±10% supply to maintain memory state; removal of VCC results in immediate data loss.

How does the M/S pin affect BUSY signal behavior on the 7005S20G?

When M/S = HIGH, the 7005S20G operates as a master: BUSYL and BUSYR are push-pull outputs that assert LOW during port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs, and external BUSY signals from a master device inhibit writes on the corresponding port - enabling hierarchical arbitration in multi-device systems.

Can the 7005S20G be used in a single-port configuration?

Yes, the 7005S20G can be operated as a single-port SRAM by connecting only one port's address, data, and control lines and tying the unused port's CE high. However, doing so forfeits dual-port advantages and consumes full active power - for pure single-port use, a lower-cost mono-port SRAM would be more appropriate.

What are the voltage thresholds for reliable interrupt flag generation on the 7005S20G?

Interrupt flags (INTL/INTR) are asserted when writes occur to addresses 1FFEh (set left flag) or 1FFFh (set right flag), provided BUSYL/BUSYR are HIGH. Input voltage thresholds follow standard TTL levels: VIH ≥ 2.2 V, VIL ≤ 0.8 V. The interrupt remains active until cleared by a subsequent write to the same address, independent of CE or OE states.