Renesas 71024S15YG8

Overview

71024S15YG8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 15 ns access time, industrial temperature range (–40°C to +85°C), single 5V supply operation, and TTL-compatible bidirectional I/O. It serves as fast, non-refreshing main or cache memory in embedded controllers and real-time data acquisition systems.

For engineers reviewing the 71024S15YG8 datasheet, 71024S15YG8 pinout, 71024S15YG8 application, or 71024S15YG8 equivalent, key selection criteria include access time vs. power trade-offs, SOJ package compatibility, industrial-grade reliability, and dual chip select architecture for memory banking.

Technical Context

The 71024S15YG8 implements fully static asynchronous logic with no clocks or refresh cycles required. Its dual chip select (CS1, CS2) enables hierarchical memory mapping, while the dedicated OE pin supports fast output enable timing (tOE ≤ 7 ns) independent of write control.

It uses high-reliability CMOS fabrication with TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and operates across VCC = 4.5–5.5 V. Standby current is minimized via two low-power modes: ISB = 40 mA (TTL-level deselect) and ISB1 = 10 mA (CMOS-level full standby).

Key Specifications

Pinout & Package

71024S15YG8 is supplied in a 32-pin 400-mil Plastic SOJ (PBG32) package with gull-wing leads, optimized for surface-mount assembly and thermal dissipation in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed parallel SRAM applications.

Compared with CY62128EV30LL-45ZAXI and AS6C4008-55ZIN, the 71024S15YG8 delivers the fastest access (15 ns) at 5 V in SOJ packaging, with dual standby modes for optimized power management in thermally demanding industrial deployments.

Availability

71024S15YG8 is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging subsystems, avionics data loggers, and test & measurement instruments requiring stable component supply and long-term obsolescence support.

Supply support for 71024S15YG8 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 71024S15YG8 belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for 5V industrial systems requiring deterministic, refresh-free memory performance with robust thermal and ESD tolerance.

FAQ

What is the maximum clock frequency supported by the 71024S15YG8?

The 71024S15YG8 is an asynchronous SRAM and does not use a clock signal. Its maximum effective data rate is determined by its 15 ns access time, supporting read/write cycles up to approximately 66.7 MHz in ideal conditions. System timing must comply with tRC = 15 ns, tWP ≥ 12 ns, and tDW ≥ 8 ns per the AC Electrical Characteristics table.

Does the 71024S15YG8 require refresh circuitry?

No, the 71024S15YG8 is a fully static RAM and requires no refresh cycles or external timing control. Its CMOS latch-based memory cells retain data indefinitely as long as VCC is applied and within specification (4.5–5.5 V), making it suitable for deterministic real-time systems.

What is the difference between ISB and ISB1 standby current in the 71024S15YG8?

ISB (40 mA max) is the current drawn when either CS1 or CS2 is inactive at TTL logic levels (e.g., CS1 ≥ 2.0 V or CS2 ≤ 0.8 V). ISB1 (10 mA max) is the deeper standby current achieved only when both CS1 and CS2 are driven to CMOS-compatible thresholds (CS1 ≥ VCC–0.2 V and CS2 ≤ 0.2 V), enabling tighter power control.

Can the 71024S15YG8 be used with a 3.3 V microcontroller interface?

The 71024S15YG8 is specified for 5 V operation (VCC = 4.5–5.5 V) and has TTL-compatible inputs (VIH ≥ 2.2 V), so it can accept 3.3 V logic HIGH signals. However, its outputs swing to VOH ≥ 2.4 V, which may fall below the VIH requirement of some 3.3 V receivers; level-shifting or verification against the receiving device's input spec is recommended.

Is the 71024S15YG8 RoHS compliant and lead-free?

Yes, the 71024S15YG8 is a green (lead-free, halogen-free) device per Renesas' ordering nomenclature "G" suffix and complies with RoHS Directive 2011/65/EU. The "Y" in the part number denotes Pb-free SOJ packaging, and "G" confirms restricted hazardous substance compliance.