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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas IDT71016S20YI

Name: IDT71016S20YI
Brand: Renesas
SKU: IDT71016S20YI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IDT71016S20YI

Manufacturer:: Renesas

Category:: Memory

Package:: 44-BSOJ (0.400", 10.16mm Width)

Datasheet:: IDT71016S20YI.pdf

Description:: IC SRAM 1MBIT PARALLEL 44SOJ

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Product details

Overview

IDT71016S20YI from Integrated Device Technology is a 64K × 16-bit (1 Mbit) high-speed CMOS static RAM with 20 ns access time, TTL-compatible I/O, single 5V supply operation, and dual byte enable (BHE/BLE) for flexible 8-bit or 16-bit data bus interfacing - used in industrial embedded controllers requiring deterministic memory timing.

For engineers reviewing the IDT71016S20YI datasheet, IDT71016S20YI pinout, IDT71016S20YI application, or IDT71016S20YI equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), 44-pin SOJ package compatibility, 20 ns read cycle time, and byte-selectable write capability without external logic.

Technical Context

The IDT71016S20YI implements fully static asynchronous architecture with no clocks or refresh required. Its address decoding, sense amplifiers, and bidirectional I/O buffers are all CMOS-based and operate from a single 5.0 V ±10% supply.

It supports three independent write control modes: chip-select–driven, write-enable–driven, and byte-enable–driven, with guaranteed timing parameters including tAA = 20 ns, tRC = 20 ns, and tOE = 10 ns under industrial conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	64K × 16-bit (1,048,576 bits), enabling direct interface to 16-bit microprocessors without data splitting logic
Access Time (tAA)	20 ns max at VCC = 4.5–5.5 V and TA = –40°C to +85°C - defines minimum address-to-data valid delay in read cycles
Read Cycle Time (tRC)	20 ns max - sets shortest interval between successive read operations on same device
Supply Voltage	5.0 V ±10% - compatible with legacy 5V TTL/CMOS system rails without level-shifting
Operating Temperature	–40°C to +85°C - qualified for industrial environments including motor drives and PLCs
Standby Current (ISB1)	10 µA max at CMOS-level chip deselect (CS > VHC) - enables ultra-low-power sleep states
I/O Interface	TTL-compatible inputs and outputs - eliminates need for bus interface translators in mixed-logic systems

Pinout & Package

Package: 44-pin Plastic SOJ (SO44-1), JEDEC standard, 400-mil width, lead pitch 0.05 inch.

Pin/Terminal	Circuit Role	Design Meaning
A0–A15	Address Inputs	16-bit address bus accepting full 64K word space; latched internally on CS/WE transitions
CS	Chip Select	Active-low enable controlling device participation in bus cycles; enables low-power standby when high
WE	Write Enable	Active-low signal qualifying write operations; combined with BHE/BLE to select byte or word writes
OE	Output Enable	Active-low control of output drivers; allows shared bus operation with tri-state isolation in 10 ns
BHE, BLE	Byte Enable	Independent active-low controls for upper (I/O8–I/O15) and lower (I/O0–I/O7) data bytes
I/O0–I/O15	Bidirectional Data	16-bit multiplexed data path; direction determined by WE and OE states per cycle
VCC, VSS	Power/Ground	Single 5V supply pins; decoupling required within 0.5 inch due to 170 mA dynamic ICC

Key Features

Feature	Design Value
Dual Byte Enable (BHE/BLE)	Enables independent 8-bit writes to high or low byte without masking logic or extra control lines
20 ns Industrial-Grade Timing	Guaranteed tAA/tRC ≤ 20 ns across –40°C to +85°C, supporting real-time deterministic memory access
CMOS-Level Standby (ISB1)	10 µA max current when CS held above VHC - reduces idle power in battery-backed or energy-sensitive systems
TTL-Compatible I/O	VIH ≥ 2.2 V and VOL ≤ 0.4 V at 8 mA drive - interoperates directly with 74LS, 74F, and early microprocessor buses
No Clock or Refresh Required	Fully static design eliminates timing-critical refresh cycles and clock distribution networks

Applications

Industrial PLC Memory Buffer	Legacy 16-Bit Microprocessor Cache
Use Scenario: Real-time I/O scanning in programmable logic controllers where deterministic memory latency is critical for scan-cycle consistency. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer storing process image data with 20 ns access guaranteeing sub-100 µs scan times. Use Value: Eliminates wait states on 80C186/80C188-based controllers, maintaining hard real-time response without external timing glue.	Use Scenario: Instruction/data cache for 16-bit embedded CPUs such as Motorola 68000 or Intel 80286 in test equipment and avionics subsystems. IC Role / Device Role / Timing Role: High-speed scratchpad memory mapped into CPU address space with byte-selectable writes for efficient stack and register file access. Use Value: Enables zero-wait-state execution at 12.5 MHz CPU clock via 20 ns tRC, reducing instruction fetch overhead by >35% vs. slower SRAM.
Telecom Line Card Frame Buffer	Medical Imaging Data Pipeline
Use Scenario: Temporary storage of T1/E1 frame payloads in channelized line cards where bursty traffic demands fast random access. IC Role / Device Role / Timing Role: Dual-port–emulated buffer using OE-controlled read/write separation and BHE/BLE for channel-aligned byte writes. Use Value: Supports 1.544 Mbps T1 payload buffering with <50 ns worst-case read-modify-write latency for HDLC processing.	Use Scenario: Pixel data staging in ultrasound or digital X-ray front-end modules before FPGA-based compression or display rendering. IC Role / Device Role / Timing Role: Burst-mode acquisition buffer synchronized to ADC sampling clocks, leveraging tAS = 0 ns setup requirement for tight timing margins. Use Value: Captures 12-bit pixel streams at 20 MSPS without FIFO overflow, using full 16-bit bus width and 20 ns tAA for back-to-back reads.

Industrial PLC Memory Buffer

Legacy 16-Bit Microprocessor Cache

Use Scenario: Real-time I/O scanning in programmable logic controllers where deterministic memory latency is critical for scan-cycle consistency.

IC Role / Device Role / Timing Role: Non-volatile SRAM buffer storing process image data with 20 ns access guaranteeing sub-100 µs scan times.

Use Value: Eliminates wait states on 80C186/80C188-based controllers, maintaining hard real-time response without external timing glue.

Use Scenario: Instruction/data cache for 16-bit embedded CPUs such as Motorola 68000 or Intel 80286 in test equipment and avionics subsystems.

IC Role / Device Role / Timing Role: High-speed scratchpad memory mapped into CPU address space with byte-selectable writes for efficient stack and register file access.

Use Value: Enables zero-wait-state execution at 12.5 MHz CPU clock via 20 ns tRC, reducing instruction fetch overhead by >35% vs. slower SRAM.

Telecom Line Card Frame Buffer

Medical Imaging Data Pipeline

Use Scenario: Temporary storage of T1/E1 frame payloads in channelized line cards where bursty traffic demands fast random access.

IC Role / Device Role / Timing Role: Dual-port–emulated buffer using OE-controlled read/write separation and BHE/BLE for channel-aligned byte writes.

Use Value: Supports 1.544 Mbps T1 payload buffering with <50 ns worst-case read-modify-write latency for HDLC processing.

Use Scenario: Pixel data staging in ultrasound or digital X-ray front-end modules before FPGA-based compression or display rendering.

IC Role / Device Role / Timing Role: Burst-mode acquisition buffer synchronized to ADC sampling clocks, leveraging tAS = 0 ns setup requirement for tight timing margins.

Use Value: Captures 12-bit pixel streams at 20 MSPS without FIFO overflow, using full 16-bit bus width and 20 ns tAA for back-to-back reads.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY62167EV30LL-20ZSXIT	3.3 V core supply, 20 ns access, 48-pin TSOP - requires level translation for 5V systems	Targeted at newer low-voltage designs; lacks native 5V TTL compatibility	Select only if migrating to 3.3 V system architecture and redesigning I/O interface
AS6C1008-20ZIN	5 V supply, 20 ns access, 32-pin SOJ - 128K × 8 organization, no byte enables	Requires two devices for 16-bit bus; no BHE/BLE, limiting byte-granularity control	Acceptable for cost-sensitive 8-bit bus systems but adds board area and routing complexity for 16-bit use

Compared with CY62167EV30LL-20ZSXIT and AS6C1008-20ZIN, the IDT71016S20YI uniquely delivers 5V TTL compatibility, integrated BHE/BLE, and 44-pin SOJ packaging in a single device - making it the only drop-in replacement for legacy 16-bit industrial designs requiring zero layout change.

Availability

IDT71016S20YI is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and medical imaging systems requiring stable component supply and long-lifecycle support.

Supply support for IDT71016S20YI 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) was a U.S.-based semiconductor company specializing in timing, memory, and interface ICs before its acquisition by Renesas in 2019.

The IDT71016 family was designed specifically for high-reliability, 5V parallel SRAM applications in industrial and telecom equipment where pin-compatible upgrade paths and guaranteed AC timing were essential.

FAQ

What is the maximum operating temperature range for the IDT71016S20YI?

The IDT71016S20YI is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all AC and DC parameters in the datasheet, including tAA = 20 ns and ISB1 = 10 µA, making it suitable for deployment in harsh environments like factory floors and outdoor telecom cabinets.

Does the IDT71016S20YI require a clock signal or refresh circuitry?

No, the IDT71016S20YI uses fully static CMOS memory cells and requires neither a clock nor periodic refresh. Its operation is purely asynchronous - address, CS, WE, OE, and byte enables directly control read/write behavior with no hidden timing dependencies, simplifying system design and eliminating refresh-related jitter.

Can the IDT71016S20YI be used in a 5V-only system without level shifters?

Yes, the IDT71016S20YI features true TTL-compatible inputs (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and outputs (VOH ≥ 2.4 V at –4 mA, VOL ≤ 0.4 V at 8 mA), allowing direct connection to 5V microcontrollers, FPGAs, and bus transceivers without level-shifting components.

What is the function of the BHE and BLE pins on the IDT71016S20YI?

The BHE (Bus High Enable) and BLE (Bus Low Enable) pins on the IDT71016S20YI independently control write access to the upper (I/O8–I/O15) and lower (I/O0–I/O7) data bytes. When asserted low with WE, they allow byte-selective writes - critical for efficient stack operations, peripheral register updates, and mixed-endian data handling in 16-bit systems.

Is the IDT71016S20YI still recommended for new designs?

Yes - unlike earlier speed grades marked "Not recommended for new designs" in 2000, the February 2001 revision of the IDT71016S20YI datasheet explicitly removed that notice. The IDT71016S20YI remains a viable option for industrial retrofits and long-lifecycle programs where 5V parallel SRAM compatibility and SOJ footprint are mandatory.

IDT71016S20YI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 44-BSOJ (0.400", 10.16mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Asynchronous

Memory Size:: 1Mbit

Memory Organization:: 64K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 20ns

Access Time:: 20 ns

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 44-SOJ

IDT71016S20YI FAQ

1.How can I place an order for IDT71016S20YI through Aetrix?

Please submit a Request for Quotation (RFQ) for IDT71016S20YI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for IDT71016S20YI reliable?

The price and inventory of IDT71016S20YI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71016S20YI is usually 5 days.

3.What payment methods are accepted for IDT71016S20YI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71016S20YI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IDT71016S20YI?

IDT71016S20YI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IDT71016S20YI order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for IDT71016S20YI?

For technical support, including IDT71016S20YI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71016S20YI requirements.

6.How does Aetrix verify that IDT71016S20YI is sourced from the original manufacturer or authorized distributors?

All IDT71016S20YI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IDT71016S20YI meets industry standards.

7.What is the process for return or replacement of IDT71016S20YI?

All IDT71016S20YI units undergo pre-shipment inspection (PSI). If there is an issue with IDT71016S20YI, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The IDT71016S20YI part is unused and in its original packaging.

Return procedure for IDT71016S20YI:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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