Renesas 7027L35G

Overview

IDT7027L35G from IDT (now Renesas) is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address, 35 ns maximum access time, 1 mW typical standby power, TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbiration logic - deployed in real-time embedded systems requiring deterministic inter-processor communication.

For engineers reviewing the IDT7027L35G datasheet, IDT7027L35G pinout, IDT7027L35G application, or IDT7027L35G equivalent, key selection considerations include bus-matching byte controls (UBL/LBL), master/slave cascading capability via M/S pin, BUSY flag arbitration timing (tBDD ≤ 35 ns), industrial temperature support (–40°C to +85°C), and TQFP-100 packaging compatibility.

Technical Context

The IDT7027L35G implements fully asynchronous dual-port operation with independent left/right address buses (A0L–A14L / A0R–A14R), separate chip enables (CE0L/CE1L and CE0R/CE1R), and dedicated I/O banks (I/O0L–I/O15L / I/O0R–I/O15R). Its on-chip arbitration logic resolves port contention using address-match or chip-enable timing, with BUSY outputs asserted when write collisions occur.

It supports semaphore signaling across ports via dedicated SEM pins and A0–A2 addressing of eight shared flags, while interrupt generation is triggered by writes to fixed mailbox addresses (7FFE_H for INTL, 7FFF_H for INTR). Power management uses TTL- or CMOS-level CE inputs to enter low-current standby modes (ISB3 ≤ 0.2 mA).

Key Specifications

Pinout & Package

Package: 100-pin TQFP (IDT package code PNG100), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green (Pb-free) construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-35AXC and AS7C33256B-35TIN, the IDT7027L35G uniquely delivers 5 V native operation with full hardware arbitration, making it optimal for legacy industrial systems where voltage compatibility and deterministic contention resolution are mandatory.

Availability

IDT7027L35G is available at Aetrix Electronics and suitable for industrial motion controllers, avionics data concentrators, medical imaging subsystems, and telecom line cards requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for IDT7027L35G 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

Renesas Electronics (formerly Integrated Device Technology) is a global semiconductor leader focused on microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

The IDT7027L35G belongs to Renesas' legacy high-speed dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems with strict timing and reliability requirements.

FAQ

What is the maximum operating temperature range for the IDT7027L35G?

The IDT7027L35G is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the DC Operating Conditions table (Table 6) and applies to all speed grades including the 35 ns version. The device maintains full functionality and timing compliance across this range when powered with 5.0 V ±10%.

Does the IDT7027L35G support true simultaneous access to the same memory address?

Yes, the IDT7027L35G implements true dual-ported memory cells that permit simultaneous read/write access to the identical memory location from left and right ports. This capability is explicitly stated in the Features section and enabled by on-chip arbitration logic that asserts BUSY flags only when write-write contention occurs - not during read-write or read-read operations.

How does the M/S pin affect BUSY signal behavior on the IDT7027L35G?

When M/S = VIH, the IDT7027L35G operates as a Master: BUSYL and BUSYR are push-pull outputs reflecting port arbitration status. When M/S = VIL, it operates as a Slave: BUSYL and BUSYR become inputs that internally inhibit writes when driven low. This configuration enables automatic handshake in cascaded master/slave systems without external logic.

What is the standby current consumption of the IDT7027L35G in full standby mode?

In full standby mode (ISB3), where both ports have CMOS-level inputs (CE > VCC − 0.2 V, all inputs at rail), the IDT7027L35G consumes ≤ 0.2 mA typical (≈1 mW at 5 V). This value is specified in Table 10a for the "L" variant and confirmed across commercial and industrial temperature ranges.

Can the IDT7027L35G be used in a 32-bit or wider memory system?

Yes, the IDT7027L35G supports 32-bit or wider data bus expansion via its Master/Slave select (M/S) feature. Multiple devices can be cascaded with one configured as Master (M/S = VIH) and others as Slaves (M/S = VIL), using BUSY flag handshaking to ensure synchronized, error-free operation without additional discrete logic.