Renesas 7007L25G

Overview

IDT7007L25G from IDT (now Renesas) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 25 ns max access time (industrial temperature range), 5 V ±10% single supply, and on-chip semaphore/interrupt arbitration logic - used in real-time inter-processor communication systems such as industrial PLCs and embedded dual-CPU controllers.

For engineers reviewing the IDT7007L25G datasheet, IDT7007L25G pinout, IDT7007L25G application, or IDT7007L25G equivalent, key selection criteria include simultaneous port access timing, BUSY/INT flag behavior under contention, master/slave cascading support, and low-power standby current (≤5 µA per port in full CMOS standby mode).

Technical Context

The IDT7007L25G implements fully asynchronous dual-port operation with separate address, control, and I/O buses for left and right ports. Its on-chip arbitration logic resolves memory contention via push-pull BUSY flags and supports both address-match and CE-controlled BUSY assertion modes.

It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) accessible via SEM = VIL, and interrupt flags (INTL/INTR) triggered by writes to fixed addresses (7FFE_H/7FFF_H). M/S pin configures master (BUSY output) or slave (BUSY input) operation for multi-device expansion.

Key Specifications

Pinout & Package

Package: 80-pin TQFP (14 mm × 14 mm × 1.4 mm), RoHS-compliant, green part (Pb-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-25AXC and R1EX24032AS0C-25, the IDT7007L25G uniquely delivers integrated semaphore/arbitration logic in an industrial-qualified 80-pin TQFP, reducing system-level complexity and enabling drop-in replacement in legacy IDT-based designs without layout change.

Availability

IDT7007L25G is available at Aetrix Electronics and suitable for industrial PLCs, dual-core embedded controllers, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for IDT7007L25G 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 acquired Integrated Device Technology (IDT) in 2019 and maintains full support for the legacy IDT memory portfolio, including dual-port SRAMs.

The IDT7007L25G belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time industrial and embedded systems where hardware arbitration and low-latency shared memory are critical.

FAQ

What is the maximum access time specification for IDT7007L25G?

The IDT7007L25G has a maximum address access time (tAA) of 25 ns over the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply. This value is guaranteed per AC Electrical Characteristics Table 12a and applies to both left and right ports under specified test conditions (VCC = 5 V, f = fMAX, GND-to-3 V input levels). The IDT7007L25G achieves this timing without requiring external wait-state generation.

Does IDT7007L25G support master/slave configuration for wider data bus expansion?

Yes, the IDT7007L25G supports master/slave cascading via the M/S pin: when high, it configures the device as a master with BUSY outputs; when low, as a slave with BUSY inputs. This allows multiple IDT7007L25G devices to be combined into 16-bit or wider memory systems without external logic, maintaining full-speed operation. The IDT7007L25G datasheet explicitly confirms this capability in the Features and Description sections.

How does the BUSY arbitration logic function in IDT7007L25G during simultaneous port access?

In IDT7007L25G, BUSY arbitration asserts BUSYL or BUSYR when both ports attempt to access the same memory location. With M/S = VIH (master), BUSY is an output that blocks the later-arriving port's write until the first write completes. Timing parameters tBAA, tBDA, and tBDD define response windows. The IDT7007L25G implements both address-match and CE-controlled arbitration modes, ensuring deterministic resolution without software intervention.

What are the valid interrupt address locations for IDT7007L25G and how are they cleared?

The IDT7007L25G uses fixed addresses 7FFE_H (left port INTL) and 7FFF_H (right port INTR) for interrupt generation. Writing to 7FFE_H from the right port sets INTL; reading 7FFE_H with CER = OER = VIL clears it. Similarly, writing to 7FFF_H from the left port sets INTR; reading 7FFF_H with CEL = OEL = VIL clears it. These operations are defined in Truth Table III and functional description - no configuration register is required to enable interrupts in IDT7007L25G.

Is IDT7007L25G pin-compatible with other speed grades in the IDT7007 family?

Yes, the IDT7007L25G is pin-compatible with all members of the IDT7007 family in the same package variant (80-pin TQFP), including IDT7007L15G, IDT7007L20G, and IDT7007L35G. Pin functions, power sequencing, and control logic are identical; only AC timing parameters differ. This allows direct speed-grade substitution in existing designs without PCB revision - provided system timing margins accommodate the slower/faster grade.