Renesas 7008L15JG

Overview

IDT7008L15JG from Integrated Device Technology (IDT) is a high-speed 64K × 8 true dual-ported static RAM with independent left/right ports, 15 ns max access time (commercial grade), TTL-compatible 5V ±10% operation, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the IDT7008L15JG datasheet, IDT7008L15JG pinout, IDT7008L15JG application, or IDT7008L15JG equivalent, key selection criteria include port-to-port contention handling via BUSY flag, master/slave cascading capability, low-power standby (1 mW typ.), and support for simultaneous read/write to same address - critical for lock-free shared memory designs in industrial controllers and telecom line cards.

Technical Context

The IDT7008L15JG implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent access without internal arbitration delay. Its on-chip hardware semaphore logic uses A0–A2 to select among eight flags, written via I/O0 and read across all I/O lines.

Busy arbitration operates in two modes: address-match detection (tBAA ≤ 15 ns) when M/S = VIH (Master), or external BUSY input synchronization (tWB = 0 ns) when M/S = VIL (Slave). Interrupt signaling uses fixed addresses FFFE_H (left port set) and FFFF_H (right port set), with tINS ≤ 15 ns propagation.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant green variant available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15ZXI and R1EX24064ASAS0I#U0, the IDT7008L15JG uniquely integrates master/slave configuration, hardware semaphores, and 15 ns 8-bit access in a single 100-pin TQFP - reducing BOM count and PCB area in tightly timed inter-processor communication links.

Availability

IDT7008L15JG is available at Aetrix Electronics and suitable for industrial PLC memory buffers, telecom line card shared memory, and medical imaging data pipelines requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for IDT7008L15JG 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

Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019. IDT pioneered high-performance dual-port SRAM architectures for real-time embedded systems.

The IDT7008L15JG belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in industrial automation, telecommunications infrastructure, and medical electronics where hardware arbitration and low-latency memory access are mandatory.

FAQ

What is the maximum operating frequency supported by the IDT7008L15JG?

The IDT7008L15JG does not operate on a clock; it is an asynchronous SRAM. Its 15 ns access time (tAA) supports effective read cycles up to 66.7 MHz when address and control signals meet setup/hold requirements. Sustained bandwidth depends on system-level timing margins, not an internal clock frequency.

How does the BUSY arbitration logic function in master versus slave configuration for the IDT7008L15JG?

When M/S = VIH (Master), BUSYL and BUSYR are outputs that assert low during port contention to block writes. When M/S = VIL (Slave), BUSYL and BUSYR become inputs - external logic must drive them low to inhibit writes. This dual-mode enables flexible cascade topologies without redesigning arbitration circuitry.

Can the IDT7008L15JG be used for simultaneous read operations from both ports to the same memory location?

Yes. The IDT7008L15JG's true dual-port memory cells allow concurrent reads from identical addresses on left and right ports with no timing penalty or data corruption. This capability is fundamental to its use in mirrored buffer and cache-coherent subsystems.

What are the voltage thresholds for the IDT7008L15JG's TTL-compatible inputs?

The IDT7008L15JG specifies VIH = 2.2 V min and VIL = 0.8 V max for all control and address inputs under VCC = 5.0 V ±10%. These thresholds ensure reliable interfacing with standard 74LS, 74ALS, and 5V microcontrollers without level shifters or pull-up resistors.

Does the IDT7008L15JG support power-down modes, and how is low-power operation achieved?

Yes. The IDT7008L15JG supports four standby modes via CE0/CE1 combinations. In full standby (ISB3), both ports disabled with CMOS-level inputs, it draws just 0.2 mA typical - achieved through complete gate-level power gating of unselected port circuitry, not just I/O disable.