Renesas 7024S35PFI

Overview

7024S35PFI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 35 ns max read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic-designed for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 7024S35PFI datasheet, 7024S35PFI pinout, 7024S35PFI application, or 7024S35PFI equivalent, this page delivers verified timing specs (tRC = 35 ns), power data (ISB3 = 0.2 mA typ.), industrial temperature support (–40°C to +85°C), package mapping (100-pin TQFP), and validated alternatives for dual-port memory replacement in bus-width expansion and master/slave memory architectures.

Technical Context

The 7024S35PFI implements fully asynchronous dual-port access with separate address, control, and I/O buses per port, enabling simultaneous reads from the same memory location. Its on-chip arbitration logic resolves contention via BUSY flag signaling and supports semaphore operations using A0–A2 addressing and SEM enable.

It features master/slave cascading capability via M/S pin: when M/S = H, BUSY is an output flag indicating port contention; when M/S = L, BUSY serves as input to synchronize slave writes. Battery backup operation at 2V retains data with ISB3 ≤ 0.2 mA (typ.) in low-power (L) mode.

Key Specifications

Pinout & Package

7024S35PFI is packaged in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, compliant with JEDEC MO-159. All VCC and GND pins must be connected per datasheet note; N/C pins are internally unused and must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-35AXC and IDT70V24L15PF, the 7024S35PFI uniquely delivers 5V-native operation, hardware BUSY arbitration, and industrial temperature support in a pin-compatible 100-pin TQFP-making it the sole option for drop-in upgrades in legacy 5V dual-processor systems requiring deterministic contention resolution.

Availability

7024S35PFI is available at Aetrix Electronics and suitable for industrial PLC communication, avionics data exchange, and medical imaging frame buffer applications requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial temperature performance.

Supply support for 7024S35PFI 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 semiconductor company specializing in timing, memory interface, RF, and high-performance silicon solutions, now part of Renesas Electronics.

The 7024S35PFI belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems where hardware arbitration and bus-width scalability are critical.

FAQ

What is the maximum operating temperature range for the 7024S35PFI?

The 7024S35PFI is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings table and DC Electrical Characteristics section of the official IDT datasheet (document 2740, Rev Feb.20.20). It is not qualified for military or extended commercial ranges.

Does the 7024S35PFI support battery backup data retention, and at what voltage?

Yes, the 7024S35PFI supports data retention at 2.0 V (VDR = 2.0 V), with typical retention current ICCDR = 100 µA and maximum 4000 µA under industrial conditions. This capability is explicitly documented in Table 10 (Data Retention Characteristics) and applies only to the "L" variant-confirmed by the "S35" suffix indicating Speed Grade 35 ns and "L" power mode.

How does the M/S pin affect BUSY signal behavior on the 7024S35PFI?

When M/S = H (high), the 7024S35PFI operates as Master: BUSYL and BUSYR become output signals indicating port contention. When M/S = L (low), it operates as Slave: BUSYL and BUSYR become inputs that must be driven externally to block writes during arbitration-per Truth Table II and Pin Name definitions in the datasheet.

What package type is used for the 7024S35PFI, and how many pins does it have?

The 7024S35PFI uses a 100-pin Thin Quad Flatpack (TQFP) package, designated PNG100 in IDT documentation. Its dimensions are 14 mm × 14 mm × 1.4 mm, and it features 0.5 mm lead pitch. This is confirmed in the Pin Configurations section (page 3, drawing 2740 drw 03) and Package Notes.

Can the 7024S35PFI perform simultaneous reads from both ports to the same memory address?

Yes-the 7024S35PFI implements true dual-port memory cells that allow fully asynchronous, simultaneous reads from identical addresses on left and right ports without contention or timing penalty. This capability is explicitly stated in the Features list ("True Dual-Ported memory cells which allow simultaneous reads of the same memory location") and supported by the functional block diagram.