Renesas 7007S35G

Overview

7007S35G from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 35 ns read cycle time (tRC), TTL-compatible 5 V ±10% operation, and integrated hardware semaphore and interrupt logic - used in real-time interprocessor communication systems requiring concurrent memory access without arbitration overhead.

For engineers reviewing the 7007S35G datasheet, 7007S35G pinout, 7007S35G application, or 7007S35G equivalent, this page delivers verified timing specs (tAA ≤ 35 ns, tACE ≤ 35 ns), power metrics (ISB1 = 20 mA max at both ports standby), package mapping (80-pin TQFP), and validated alternatives for dual-port SRAM migration in embedded control, DSP co-processing, and FPGA-based data buffering.

Technical Context

The 7007S35G implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous read/write to the same location only when BUSY arbitration is disabled or properly sequenced. Its on-chip semaphore logic uses A0–A2 to select among eight flags, accessed via SEM = VIL and CE = VIH, with tSOP = 15 ns minimum pulse width.

Interrupt signaling operates via dedicated INTL/INTR pins tied to fixed addresses (7FFE_H and 7FFF_H), where write-to-flag and read-to-clear are strictly defined in Truth Table III; BUSY arbitration supports both CE-controlled and address-match modes, with tAPS = 5 ns priority setup time required for deterministic resolution.

Key Specifications

Pinout & Package

7007S35G is packaged in an 80-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, with 0.5 mm pitch and exposed thermal pad (not electrically connected). All VCC and GND pins must be decoupled locally per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-35AXC and IDT70V27L25PFGI, the 7007S35G uniquely retains 5 V TTL compatibility, industrial temperature rating, and identical 80-pin TQFP footprint - making it the only direct replacement for legacy 5 V dual-port SRAM upgrades without board rework.

Availability

7007S35G is available at Aetrix Electronics and suitable for real-time interprocessor communication, DSP/FPGA co-processing buffers, and industrial PLC memory expansion requiring stable component supply across extended product lifecycles.

Supply support for 7007S35G 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) was a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance silicon solutions before its acquisition by Renesas Electronics in 2019.

The 7007S35G belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor data exchange in industrial control, telecommunications infrastructure, and avionics systems.

FAQ

What is the maximum operating frequency supported by the 7007S35G?

The 7007S35G does not operate on a clock signal - it is fully asynchronous. Its speed is defined by timing parameters: maximum read cycle time (tRC) is 35 ns, supporting effective throughput up to ~28.6 MHz for consecutive reads. Write cycle time (tWC) is also 35 ns, enabling matching write bandwidth without pipeline stalls. These values are guaranteed over the full industrial temperature range (–40°C to +85°C).

Does the 7007S35G support master/slave cascading for wider data paths?

Yes, the 7007S35G supports master/slave configuration via the M/S pin. When M/S = H, BUSY signals are outputs (master mode); when M/S = L, BUSY signals become inputs (slave mode). This allows multiple 7007S35G devices to be cascaded for 16-bit or wider memory systems without external arbitration logic - a key feature confirmed in the functional description and pin table of the datasheet.

How does semaphore functionality work on the 7007S35G?

Semaphore operation on the 7007S35G is enabled by asserting SEM = VIL and CE = VIH. The eight semaphore flags are addressed using A0–A2, and data is written via I/O0 (per Truth Table II). Reading returns the flag state on all I/O lines. Timing requires tSOP ≥ 15 ns pulse width and tSAA ≤ 35 ns access - ensuring atomic lock/unlock operations without CPU intervention, as verified in Tables 03 and 12b.

What are the power consumption characteristics of the 7007S35G in standby mode?

In full standby (ISB3), with both ports disabled and all inputs at CMOS levels (VIN > VCC – 0.2 V or < 0.2 V), the 7007S35G draws ≤ 0.2 mA typical and ≤ 5 mA maximum. With TTL-level inputs (ISB1), standby current is ≤ 20 mA maximum for both ports - measured at VCC = 5.0 V ±10% and TA = +25°C, per Table 09. These values are production-tested and apply across the industrial temperature range.

Can the 7007S35G be used in place of the 7007L variant?

No - the 7007S35G and 7007L are distinct speed grades: 7007S35G guarantees tRC ≤ 35 ns (industrial/commercial/military), while 7007L specifies tRC ≤ 20 ns. They share identical pinout, function, and package, but timing parameters differ. Substituting 7007L for 7007S35G is acceptable if system timing margins allow; substituting 7007S35G for 7007L may violate setup/hold requirements in 20 ns-constrained designs.