Renesas IDT71024S12TY8

Overview

IDT71024S12TY8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 12 ns access time, industrial temperature range (–40°C to +85°C), and TTL-compatible bidirectional I/O. It operates from a single 5.0 V ±0.5 V supply, features dual chip selects (CS1, CS2) plus output enable (OE), and targets real-time data buffering in legacy industrial controllers and telecom line cards.

For engineers reviewing the IDT71024S12TY8 datasheet, IDT71024S12TY8 pinout, IDT71024S12TY8 application, or IDT71024S12TY8 equivalent, key selection criteria include guaranteed 12 ns tAA and tRC timing, low 10 µA ISB1 standby current, SOJ-32 300-mil package compatibility, and industrial-grade reliability without refresh circuitry.

Technical Context

The IDT71024S12TY8 implements fully static asynchronous operation-no clocks or refresh cycles required-using high-reliability CMOS process technology. Its dual CS architecture enables hierarchical memory mapping, while OE-controlled output gating achieves 6 ns tOE and 5 ns tOHZ for precise bus timing control.

All inputs and outputs are TTL-compatible (VIH = 2.2 V min, VIL = 0.8 V max), and the device supports three power states: active read/write (ICC = 160 mA max), TTL-level standby (ISB = 40 mA max), and CMOS-level deep standby (ISB1 = 10 mA max), enabling dynamic power management in embedded systems.

Key Specifications

Pinout & Package

32-pin Plastic SOJ (PJG32), 300-mil body width, gull-wing leads, JEDEC MS-012AC compliant. Pin 1 marked by notch or bevel; top view shown in datasheet Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY62128EV30LL-45ZSXIT and AS6C1008-12ZIN, the IDT71024S12TY8 delivers guaranteed 12 ns timing on a proven 5 V TTL bus with drop-in compatibility in PJG32 SOJ-32 sockets, making it the sole option for maintaining legacy system performance without hardware revision.

Availability

IDT71024S12TY8 is available at Aetrix Electronics and suitable for industrial PLC data buffering, telecom line card FIFOs, legacy medical imaging controllers, ruggedized test equipment memory, and real-time control system boot ROM shadowing requiring stable component supply over extended production lifecycles.

Supply support for IDT71024S12TY8 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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The IDT71024S12TY8 belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for 5 V TTL-based embedded systems requiring deterministic, no-refresh memory with industrial temperature resilience.

FAQ

What is the maximum guaranteed address access time for IDT71024S12TY8?

The IDT71024S12TY8 has a maximum guaranteed address access time (tAA) of 12 ns across the full industrial temperature range (–40°C to +85°C) and supply voltage (4.5 V to 5.5 V), as specified in Table 9 of the Renesas datasheet. This value is production-tested and applies to all valid address, CS1, and CS2 transitions meeting setup/hold requirements. The IDT71024S12TY8 achieves this performance using optimized CMOS gate design without requiring external wait-state generation.

Does IDT71024S12TY8 require a clock or refresh signal to retain data?

No, the IDT71024S12TY8 is a fully static RAM and requires neither a clock nor periodic refresh cycles to retain stored data. Its internal six-transistor (6T) cell design maintains state as long as VCC remains within specification (4.5 V to 5.5 V) and ambient temperature stays within –40°C to +85°C. This eliminates timing-critical refresh overhead in microcontroller-based systems and simplifies firmware development compared to DRAM solutions.

What are the logic thresholds for TTL compatibility on IDT71024S12TY8 inputs?

The IDT71024S12TY8 inputs meet standard TTL voltage thresholds: VIH (input high voltage) is guaranteed ≥2.2 V, and VIL (input low voltage) is guaranteed ≤0.8 V, per Table 4 of the datasheet. These levels ensure direct interoperability with 5 V TTL and LS-TTL logic families without level-shifting circuitry. The IDT71024S12TY8 also drives VOH ≥2.4 V at –4 mA and VOL ≤0.4 V at 8 mA, satisfying TTL output fan-out requirements.

Can IDT71024S12TY8 operate in both commercial and industrial temperature grades?

The IDT71024S12TY8 is specifically qualified for the industrial temperature range (–40°C to +85°C), as indicated by the "I" suffix in its ordering code and confirmed in the Datasheet Section 1 (Features) and Table 5 (Recommended Operating Conditions). While the base IDT71024 family includes commercial-grade variants (0°C to +70°C), the IDT71024S12TY8 part number denotes the industrial-grade version with full characterization and screening across the extended range.

What package type and dimensions does IDT71024S12TY8 use?

IDT71024S12TY8 uses a 32-pin Plastic SOJ (Small Outline J-lead) package with 300-mil body width (PJG32), per Renesas ordering information and Pin Configuration diagram. Lead pitch is 0.050 inch (1.27 mm), body width is 0.300 inch (7.62 mm), and total length is 0.750 inch (19.05 mm). This JEDEC MS-012AC-compliant package supports standard infrared reflow and wave soldering processes used in industrial PCB assembly.