Renesas 7008L20PF8

Overview

IDT7008L20PF8 from Integrated Device Technology (IDT) is a high-speed 64K × 8 true dual-port static RAM with independent left/right ports, 20 ns maximum access time (industrial grade), TTL-compatible 5 V ±10% operation, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the IDT7008L20PF8 datasheet, IDT7008L20PF8 pinout, IDT7008L20PF8 application, or IDT7008L20PF8 equivalent, key selection considerations include BUSY-flag arbitration timing (tBDD ≤ 20 ns), dual chip-enable depth expansion capability, low standby power (1 mW typ.), and 100-pin TQFP packaging with verified pin mapping for master/slave cascading.

Technical Context

The IDT7008L20PF8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling simultaneous read/write to the same memory location without contention. Its on-chip arbitration logic uses push-pull BUSY outputs (not open-drain) and supports both address-match and CE-controlled arbitration modes.

It integrates eight hardware semaphores addressed via A0–A2, accessed only when CE = VIH and SEM = VIL, with write-to-I/O0/read-from-all-I/Os behavior. The M/S pin configures master (BUSY output) or slave (BUSY input) mode, enabling error-free 16-bit+ word expansion without external logic.

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. All VCC and GND pins must be connected per datasheet Note 1 & 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC and R1EX24064ASAS0I#U0, the IDT7008L20PF8 uniquely delivers true dual-port concurrency, hardware semaphore arbitration, and 20 ns industrial-grade timing in a single 100-pin TQFP package-making it irreplaceable for deterministic inter-processor communication.

Availability

IDT7008L20PF8 is available at Aetrix Electronics and suitable for real-time industrial PLCs, automotive engine control units, dual-core microcontroller interfacing, and high-speed test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IDT7008L20PF8 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 in 2019. IDT pioneered high-performance dual-port SRAM architectures for real-time embedded systems.

The IDT7008L20PF8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in safety-critical and industrial control applications where hardware arbitration and low-latency memory sharing are essential.

FAQ

What is the operating temperature range for the IDT7008L20PF8?

The IDT7008L20PF8 is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including 20 ns access time, BUSY arbitration timing (tBDD ≤ 20 ns), and standby current (1 mW typ.), making it suitable for under-hood automotive and factory-floor deployments where ambient extremes are expected.

How does the BUSY arbitration logic work in the IDT7008L20PF8?

The IDT7008L20PF8 uses push-pull BUSY outputs (BUSYL/BUSYR) that assert when both ports attempt writes to the same address. In master mode (M/S = VIH), BUSY signals block the later-arriving write; in slave mode (M/S = VIL), BUSY inputs inhibit local writes. The tBDD parameter (≤20 ns) defines the delay from BUSY deassertion to valid read data-ensuring deterministic resolution of port contention.

Can the IDT7008L20PF8 be used for 16-bit data bus expansion?

Yes-the IDT7008L20PF8 supports 16-bit or wider data bus expansion via its Master/Slave (M/S) configuration. When cascaded, one device operates as master (BUSY output) and others as slaves (BUSY input), enabling full-speed, error-free 16-bit word access without external glue logic. This is explicitly supported in the functional block diagram and truth tables of the IDT7008L20PF8 datasheet.

What is the purpose of the SEM pins on the IDT7008L20PF8?

The SEML and SEMR pins on the IDT7008L20PF8 enable access to the on-chip semaphore registers. When CE = VIH and SEM = VIL, the device enters semaphore mode-using A0–A2 to select one of eight flags, with I/O0 used for writing and all I/O0–I/O7 returning the flag value. This provides hardware-enforced mutual exclusion for shared resources without software intervention.

Does the IDT7008L20PF8 support power-down modes?

Yes-the IDT7008L20PF8 implements multiple power-down modes controlled by CE0 and CE1 enables. Full standby (ISB3) draws just 1 mW typical when both ports are deselected with CMOS-level inputs; partial standby (ISB4) draws 80 mW typical when one port is active. These modes are production-tested and specified across the full industrial temperature range.