Renesas 7024S17PFI

Overview

7024S17PFI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 17 ns maximum read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to the same memory location and supports MASTER/SLAVE cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the 7024S17PFI datasheet, 7024S17PFI pinout, 7024S17PFI application, or 7024S17PFI equivalent, key selection considerations include dual-port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S = H/L configuration, battery-backed data retention at 2V (L-version only), and compatibility with 84-pin PLCC packaging for industrial temperature operation (–40°C to +85°C).

Technical Context

The 7024S17PFI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling concurrent read/write operations without external arbitration logic. Its on-chip port arbitration logic resolves contention via BUSY flag assertion and supports semaphore signaling across ports using dedicated SEM, INT, and BUSY pins.

It features full hardware semaphore support with eight flags addressed by A0–A2, interrupt flag generation (INTL/INTR), and Master/Slave select (M/S) pin that configures BUSY as output (Master) or input (Slave). The device operates in battery backup mode down to 2V for data retention, with low-power standby current of 5 mW (typ.) in S-version.

Key Specifications

Pinout & Package

7024S17PFI is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), with 42 pins per side, body size ≈ 1.15 in × 1.15 in × 0.17 in. All VCC and GND pins must be connected per datasheet note; N/C pins are internally unused.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and IDT70V24S15PF, the 7024S17PFI offers native 5V operation, industrial temperature range, and configurable Master/Slave arbitration - making it uniquely suited for legacy 5V industrial controllers where voltage compatibility and proven field reliability are mandatory.

Availability

7024S17PFI is available at Aetrix Electronics and suitable for industrial motion controllers, avionics interface modules, and medical imaging systems requiring stable component supply across extended product lifecycles.

Supply support for 7024S17PFI 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

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in high-performance memory, timing, and interface solutions for communications, computing, and industrial markets.

The 7024S17PFI belongs to IDT's legacy dual-port SRAM product line, engineered for deterministic real-time inter-processor communication in mission-critical embedded systems where hardware arbitration and 5V compatibility are essential.

FAQ

What is the maximum operating frequency supported by the 7024S17PFI?

The 7024S17PFI does not operate on a clock; it is a fully asynchronous SRAM. Its speed is defined by timing parameters-notably tRC = 17 ns maximum read cycle time-enabling effective throughput up to ~58.8 MHz per port in burst-read scenarios. Actual system bandwidth depends on bus protocol efficiency and controller timing margins, but the 7024S17PFI itself imposes no clock-domain constraints.

Does the 7024S17PFI support battery backup for data retention?

The 7024S17PFI is the "S" (standard power) variant and does not guarantee data retention below 4.5 V. Only the "L" version (e.g., 7024L17PFI) specifies 2 V data retention per datasheet Table 10. For battery backup operation, the L-version must be selected; the S-version will lose data if VCC drops below its specified 4.5 V minimum.

How does the M/S pin affect arbitration behavior in a multi-device 7024S17PFI configuration?

When M/S = H, the 7024S17PFI acts as Master: BUSY is driven as an output flag indicating internal contention. When M/S = L, it acts as Slave: BUSY becomes an input, allowing upstream Master to control access. This enables hierarchical arbitration in cascaded systems-e.g., one Master coordinates multiple Slaves-without external logic, preserving deterministic timing.

Can the 7024S17PFI be used in a 32-bit data bus configuration?

Yes-the 7024S17PFI supports 32-bit expansion via Master/Slave cascading. Two devices can be connected with M/S pins set oppositely; the Master's BUSY output feeds the Slave's BUSY input, enabling coordinated access. IDT documentation confirms this topology yields full-speed, error-free 32-bit operation without additional discrete logic or timing penalties.

What are the key differences between the PLCC and TQFP package options for the 7024S17PFI?

The 7024S17PFI is offered in 84-pin PLCC (as in 7024S17PFI) and 100-pin TQFP variants. The PLCC version uses through-hole or surface-mount compatible gull-wing leads, offers superior thermal dissipation in industrial enclosures, and matches legacy board designs. The TQFP has finer pitch (0.5 mm), smaller footprint (14 mm × 14 mm), but requires reflow profile optimization and lacks the mechanical robustness of PLCC in high-vibration environments.