Renesas IDT70824L25PF

Overview

IDT70824L25PF from Integrated Device Technology is a high-speed 4K × 16-bit Sequential Access Random Access Memory (SARAM™) with dual-port architecture, supporting simultaneous asynchronous random access and synchronous sequential access. It delivers 25 ns clock cycle time, 20 ns random-access address access time (tAA), and 20 ns sequential-access clock-to-data time (tCD), operating on a single +5V ±10% supply with 1 mW standby power. It is used in real-time data buffering applications such as PCI-based communications controllers and military-grade radar signal processors.

For engineers reviewing the IDT70824L25PF datasheet, IDT70824L25PF pinout, IDT70824L25PF application, or IDT70824L25PF equivalent, key selection criteria include dual-port timing coordination, buffer chaining flow control, battery-backed 2V data retention, TTL-compatible I/O, and industrial temperature support (–40°C to +85°C).

Technical Context

The IDT70824L25PF implements a Dual-Port RAM cell architecture with independent random-access (asynchronous, CE/OE/R/W-controlled) and sequential-access (synchronous, SCLK/SCE-driven) ports. Its sequential port includes pointer logic supporting two internal buffers with programmable start/end addresses and EOB1/EOB2 flags for flow control.

It features separate upper-byte (UB) and lower-byte (LB) enables on the random port, CMD-mode register access for buffer configuration, and automatic power-down via CE or SCE assertion. The device supports BUFFER CHAINING and STOP flow modes, with reset (RST) and address pointer load (SLD/SSTRT1/SSTRT2) controls fully asynchronous to SCLK.

Key Specifications

Pinout & Package

Package: 80-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead-free compatible per datasheet PN80-1(4). All seven VCC and ten GND pins must be connected to respective supply rails for stable operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70824S25PF and CY7C028V-25AXC, the IDT70824L25PF uniquely integrates sequential port hardware, 1 mW standby, and industrial temperature support in a single 80-pin TQFP - eliminating external logic and reducing BOM count for streaming buffer applications.

Availability

IDT70824L25PF is available at Aetrix Electronics and suitable for PCI bus buffering, radar signal processing, military telemetry recording, and industrial motion control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for IDT70824L25PF 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and power management solutions for communications, computing, and industrial markets.

The IDT70824L25PF belongs to IDT's SARAM™ family, designed specifically for applications demanding concurrent high-speed streaming and random-access memory access - bridging the gap between FIFOs and standard dual-port SRAMs.

FAQ

What is the primary function of the IDT70824L25PF in a system architecture?

The IDT70824L25PF functions as a dual-port Sequential Access Random Access Memory (SARAM™), enabling simultaneous asynchronous random access (e.g., CPU or DMA reads/writes) and synchronous sequential access (e.g., streaming ADC or PCI data). Its architecture eliminates arbitration overhead and supports real-time buffering in radar, telemetry, and industrial control systems. The IDT70824L25PF achieves this with dedicated ports, programmable buffer pointers, and EOB flags - all integrated into a single 80-pin TQFP package.

Does the IDT70824L25PF support true battery backup operation?

Yes, the IDT70824L25PF supports true battery backup with guaranteed 2.0 V data retention voltage, allowing it to maintain stored memory contents during main power loss. This capability is validated across the full industrial temperature range (–40°C to +85°C) and requires only a 2V source connected to VCC while CE and SCE are held inactive. The IDT70824L25PF retains data without refresh and draws less than 4 mA at 2V, making it suitable for long-duration telemetry logging and mission-critical black-box recorders.

How does the sequential port of the IDT70824L25PF differ from a standard synchronous FIFO?

Unlike a basic FIFO, the IDT70824L25PF sequential port provides programmable dual-buffer addressing with start/end registers, EOB1/EOB2 status flags, and BUFFER CHAINING or STOP flow modes - all controllable via the random port's CMD mode. It also supports address pointer loading (SLD/SSTRT1/SSTRT2) and asynchronous reset (RST), enabling complex streaming patterns without external logic. The IDT70824L25PF thus functions as a configurable, self-managed buffer engine rather than a fixed-depth queue.

Can the IDT70824L25PF operate in industrial temperature conditions?

Yes, the IDT70824L25PF is explicitly qualified for industrial temperature operation from –40°C to +85°C, as confirmed in the datasheet's "Recommended Operating Temperature and Supply Voltage" table and DC electrical characteristics section. This rating applies to the L-speed grade (e.g., IDT70824L25PF) and is supported by full characterization of parameters including tAA, tCD, ISB3, and data retention across the range - making it suitable for factory automation, transportation, and outdoor embedded systems.

What are the key power-saving features of the IDT70824L25PF compared to the S-version?

The IDT70824L25PF delivers significantly lower standby power: 0.2 mA typical (ISB3) versus 1.0 mA for the S-version, due to optimized CMOS design. It achieves 1 mW typical standby (vs. 5 mW for IDT70824S), enabling always-on buffer applications with extended battery life. These savings stem from deeper sleep states activated when both CE and SCE are held at CMOS-high levels - a feature leveraged in telemetry recorders and energy-conscious industrial gateways. The IDT70824L25PF maintains identical timing performance (25 ns cycle, 20 ns tAA/tCD) despite the reduced power envelope.