Renesas 71024S12YGI8

Overview

71024S12YGI8 from Renesas Electronics is a 128K × 8-bit high-speed CMOS static RAM with 12 ns access time, industrial temperature range (–40°C to +85°C), single 5V supply operation, TTL-compatible I/O, and dual chip select plus output enable control. It serves as fast, fully static main or cache memory in embedded controllers and real-time data acquisition systems.

For engineers reviewing the 71024S12YGI8 datasheet, 71024S12YGI8 pinout, 71024S12YGI8 application, or 71024S12YGI8 equivalent, key selection criteria include guaranteed 12 ns read cycle time, industrial-grade reliability, SOJ-32 package compatibility, low standby current (10 mA ISB1), and direct TTL-level interfacing without level shifters.

Technical Context

The 71024S12YGI8 implements fully asynchronous static RAM architecture with no clocks or refresh required. Its dual CS inputs (CS1 active-low, CS2 active-high) and independent OE pin enable flexible memory banking and interleaved access control in multi-master bus systems.

All 8 bidirectional I/O lines operate at TTL voltage levels (VIH ≥ 2.2 V, VIL ≤ 0.8 V) with 5 V supply, and internal circuitry ensures tCLZ ≤ 3 ns and tOHZ ≤ 5 ns for fast bus turnaround-critical for high-throughput microprocessor co-processor interfaces.

Key Specifications

Pinout & Package

71024S12YGI8 is housed in a 32-pin Plastic SOJ (Small Outline J-Lead) package with 400-mil body width (PBG32), designed for reflow soldering and board-level reliability in industrial environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed static RAM applications.

Compared with CY62128ELL-12ZSXIT and AS6C1008-12TIN, the 71024S12YGI8 uniquely delivers 5V TTL compatibility, industrial temperature rating, and PBG32 SOJ packaging in a single device-enabling drop-in replacement in legacy 5V industrial designs without layout or voltage rail changes.

Availability

71024S12YGI8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data loggers, and medical imaging subsystems requiring stable component supply across long production lifecycles.

Supply support for 71024S12YGI8 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The IDT71024 family-including 71024S12YGI8-was developed to deliver cost-effective, high-reliability static RAM for legacy 5V embedded systems requiring zero-refresh operation and industrial environmental resilience.

FAQ

What is the maximum guaranteed access time for the 71024S12YGI8?

The 71024S12YGI8 has a maximum guaranteed address access time (tAA) of 12 ns across its full industrial temperature range (–40°C to +85°C) and supply voltage range (4.5 V to 5.5 V). This specification is production-tested and applies to all valid address transitions under standard TTL loading conditions, making it suitable for systems requiring deterministic sub-83 MHz memory interface timing.

Does the 71024S12YGI8 require a refresh circuit or clock signal?

No, the 71024S12YGI8 is a fully static RAM and requires no refresh cycles or clock input. Its internal CMOS latching circuitry maintains data indefinitely as long as power is applied and address/control signals remain stable. This eliminates refresh overhead and timing uncertainty, simplifying system design for real-time applications such as industrial control and data acquisition where deterministic latency is critical. The 71024S12YGI8 operates entirely asynchronously.

What package type and pin count does the 71024S12YGI8 use?

The 71024S12YGI8 uses a 32-pin Plastic SOJ (Small Outline J-Lead) package with 400-mil body width, designated PBG32 in Renesas' ordering nomenclature. This JEDEC-standard surface-mount package features gull-wing leads optimized for reflow soldering and mechanical robustness in industrial environments. Pin count and spacing match industry-standard 32-pin SOJ footprints, enabling direct PCB compatibility with legacy designs using similar SRAMs.

Can the 71024S12YGI8 interface directly with a 5V microcontroller without level shifters?

Yes, the 71024S12YGI8 features fully TTL-compatible inputs and outputs operating from a single 5V supply (4.5 V to 5.5 V), with VIH minimum of 2.2 V and VIL maximum of 0.8 V. Its I/O pins drive and accept standard 5V TTL logic levels directly, eliminating the need for external level-shifting circuitry when interfacing with legacy 5V microcontrollers such as the Intel 80C186, Motorola 68EC000, or FPGA I/O banks configured for 5V tolerance. This is confirmed in the DC Electrical Characteristics table of the official datasheet.

What is the standby current consumption of the 71024S12YGI8 in full power-down mode?

In full standby mode (ISB1), where both chip selects are inactive at CMOS levels-CS1 ≥ VHC or CS2 ≤ VLC-the 71024S12YGI8 draws a maximum of 10 mA at VCC = 5.5 V and TA = +85°C. This ultra-low standby current enables extended hold-up time in battery-backed applications and reduces thermal load in densely packed industrial modules. The value is production-guaranteed and applies across the full industrial temperature range, as specified in Table 7 of the Renesas datasheet.