Renesas 70V07L25JI8

Overview

IDT70V07L25JI8 from IDT (now Renesas) is a high-speed 32K × 8 true dual-port static RAM with independent left/right ports, 25 ns max access time, 3.3 V single-supply operation, and integrated semaphore/INT/BUSY arbitration logic - used in real-time inter-processor communication systems requiring simultaneous memory access without software coordination.

For engineers reviewing the IDT70V07L25JI8 datasheet, IDT70V07L25JI8 pinout, IDT70V07L25JI8 application, or IDT70V07L25JI8 equivalent, key selection criteria include dual-port arbitration timing (tBAA ≤ 25 ns), ultra-low standby current (660 µW typ.), industrial temperature support (–40°C to +85°C), and 80-pin TQFP package compatibility with bus-width expansion via M/S cascading.

Technical Context

The IDT70V07L25JI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - enabling concurrent read/write to any memory location. Its on-chip arbitration logic resolves contention via BUSY flag assertion (push-pull, no pull-up required) and supports master/slave configuration through the M/S pin.

Semaphore functionality uses dedicated A0–A2-addressed flags (8 total) accessed via SEM = VIL and CE = VIH, while interrupt signaling relies on fixed mailbox addresses (7FFE_H for INTL, 7FFF_H for INTR). Power management includes four standby modes (ISB1–ISB4), with ISB3 achieving 0.2 mA typical at CMOS-level inputs.

Key Specifications

Pinout & Package

Package: 80-pin thin quad flatpack (TQFP), JEDEC MO-220, body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm. All VCC pins require local decoupling; all GND pins must be connected to system ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V07L25JI8, CY7C028V-25AXC reduces BOM count in cost-driven commercial systems but adds design complexity for arbitration, while 70V25L25PF8 maintains electrical equivalence at the expense of modern SMT manufacturability and thermal efficiency.

Availability

IDT70V07L25JI8 is available at Aetrix Electronics and suitable for telecom line cards, industrial PLCs, avionics FMS modules, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for IDT70V07L25JI8 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 specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and communications markets.

IDT70V07L25JI8 belongs to the IDT70V07 family of high-speed dual-port SRAMs engineered for deterministic inter-processor communication in real-time embedded systems where software-managed synchronization introduces unacceptable latency.

FAQ

What is the maximum operating frequency supported by the IDT70V07L25JI8?

The IDT70V07L25JI8 has a 25 ns maximum access time (tAA), supporting reliable operation up to 40 MHz in systems where setup/hold margins are maintained. Its asynchronous architecture means no internal clock is required - timing is governed solely by CE, R/W, and OE assertion/deassertion windows per the AC specifications in Table 11.

How does the BUSY arbitration logic function in master/slave configuration with IDT70V07L25JI8?

In master mode (M/S = VIH), IDT70V07L25JI8 asserts BUSYL/BUSYR as push-pull outputs upon address match between ports; in slave mode (M/S = VIL), those pins become inputs that gate writes. When cascaded, the master's BUSY output connects to slaves' BUSY inputs, ensuring only one side writes during contention - no external logic is needed.

Can the IDT70V07L25JI8 operate with mixed voltage interfaces, such as 3.3 V core and 1.8 V I/O?

No - the IDT70V07L25JI8 requires a single 3.3 V ± 0.3 V supply for all I/O and core functions. Its inputs are TTL-compatible (VIH ≥ 2.0 V, VIL ≤ 0.8 V), but it does not support dual-supply operation or level translation. External voltage translators are required for interfacing with 1.8 V logic families.

What is the purpose of the SEM pin on the IDT70V07L25JI8, and how is it used?

The SEM pin (Semaphore Enable) selects between RAM array access (SEM = VIH) and semaphore register access (SEM = VIL). When SEM = VIL and CE = VIH, the device routes A0–A2 to eight dedicated binary flags - allowing atomic claim/release of shared resources without CPU intervention or software locks.

Does the IDT70V07L25JI8 support automatic power-down when unused, and how is it controlled?

Yes - IDT70V07L25JI8 supports four standby modes. Full standby (ISB3 = 0.2 mA typ.) activates when both CEL and CER are held > VCC − 0.2 V and all inputs are at valid CMOS levels. Per-port standby is triggered by asserting CE high on the inactive port, reducing active current to 660 µW typical for that side.