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Renesas IDT71024S20YI8
- Part No.:
- IDT71024S20YI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
IDT71024S20YI8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,618
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Product details
Overview
IDT71024S20YI8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with industrial temperature support (–40°C to +85°C), 20 ns read/write cycle time, and TTL-compatible bidirectional I/O. It operates from a single 5.0 V ±10% supply and features dual chip selects (CS1, CS2) plus dedicated output enable (OE) for flexible memory interfacing in embedded controllers and data acquisition systems.
For engineers reviewing the IDT71024S20YI8 datasheet, IDT71024S20YI8 pinout, IDT71024S20YI8 application, or IDT71024S20YI8 equivalent, key selection criteria include access time (tAA ≤ 20 ns), standby current (ISB1 = 10 mA), SOJ-32 package compatibility, and industrial-grade reliability without refresh circuitry.
Technical Context
The IDT71024S20YI8 implements fully static asynchronous operation-no clocks or refresh cycles required-using high-reliability CMOS technology. Its address-access architecture supports equal access and cycle times (tRC = tAA = 20 ns), with independent control of chip select and output enable enabling precise bus timing coordination in multi-chip memory systems.
It uses TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and delivers VOH ≥ 2.4 V at –4 mA and VOL ≤ 0.4 V at 8 mA, ensuring robust signal integrity across legacy and mixed-voltage designs. Standby modes include TTL-level (ISB = 40 mA) and CMOS-level (ISB1 = 10 mA) power reduction via CS1/CS2 logic thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), byte-wide parallel interface |
| Access Time (tAA) | 20 ns max - determines minimum CPU wait-state insertion for 50 MHz bus operation |
| Read Cycle Time (tRC) | 20 ns max - defines shortest consecutive read interval without bus contention |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary supplies needed |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor drives and PLCs |
| Standby Current (ISB1) | 10 mA max at VCC max - enables low-power hold mode during processor sleep states |
| I/O Capacitance | CI/O ≤ 8 pF - minimizes signal distortion on high-speed data buses up to 50 MHz |
Pinout & Package
Package: 32-pin Plastic SOJ (Small Outline J-Lead), 400 mil width (PBG32), lead-free and RoHS-compliant per ordering code YI8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K address space; A16 is MSB |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; direction controlled by WE and CS states |
| CS1, CS2 | Chip Select Inputs | Active-low CS1 and active-high CS2 enable hierarchical memory decoding; both required for access |
| OE | Output Enable | Active-low control of output drivers; allows shared bus arbitration without tristate conflicts |
| WE | Write Enable | Active-low signal initiating write cycle; overlaps with CS1/CS2 to define write window |
| VCC, GND | Power Supply | Single 5V supply with decoupling recommended at package pins 16 (VCC) and 17 (GND) |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Refresh Static Operation | Eliminates external refresh controller and timing overhead in microcontroller-based systems |
| Dual Chip Select Architecture | Enables banked memory expansion up to 2 MB using CS1/CS2 decode logic |
| 6 ns OE Access Time | Supports fast burst reads in DMA-driven peripherals without added wait states |
| CMOS-Level Standby Mode (ISB1) | Reduces power to 10 mA during idle periods-critical for fanless industrial enclosures |
| TTL-Compatible I/O | Direct interface with legacy 80Cxx, Z80, and 68K-family processors without level-shifting |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data RAM |
|---|---|
Use Scenario: Real-time I/O scanning and ladder logic execution in programmable logic controllers requiring deterministic memory access. IC Role / Device Role / Timing Role: Primary data RAM holding process variables, register tables, and intermediate computation results. Use Value: 20 ns tAA ensures sub-microsecond variable fetch within 100 µs scan cycles; industrial temp rating guarantees uptime in unconditioned cabinet environments. | Use Scenario: External RAM expansion for 8-bit microcontrollers (e.g., 8051, PIC18) with limited on-chip memory. IC Role / Device Role / Timing Role: Byte-addressable scratchpad memory mapped into the MCU's external data space. Use Value: TTL-compatible I/O and single 5V supply simplify interface design; SOJ-32 footprint fits compact PCB layouts typical of legacy instrumentation. |
| Communications Protocol Stack Buffer | Test Equipment Data Capture Buffer |
Use Scenario: Temporary storage of packetized data in serial protocol gateways (Modbus RTU, CAN-to-serial bridges). IC Role / Device Role / Timing Role: Dual-port accessible buffer staging incoming/outgoing frames before CRC validation or retransmission. Use Value: Independent CS1/CS2 and OE allow simultaneous host read and peripheral write via external bus arbitration logic. | Use Scenario: High-speed transient capture in digital oscilloscopes and logic analyzers sampling at 10–50 MSPS. IC Role / Device Role / Timing Role: Circular buffer storing digitized samples prior to USB/FPGA transfer. Use Value: 20 ns tRC supports back-to-back writes at 50 MHz effective bus rate; low ISB1 extends battery life in portable test gear. |
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 |
|---|---|---|---|
| CY62128EV30LL-45ZSXIT | 45 ns access, 3.3 V core (5 V tolerant I/O), 32-pin TSOP-II vs SOJ | Lower speed but lower voltage; requires level translation if interfacing with 5 V logic | Preferred where system-wide 3.3 V migration is underway and timing budget allows >40 ns latency |
| AS6C1008-20PCN | 20 ns access, 5 V supply, 32-pin SOP (not SOJ); ISB1 = 2 µA (vs 10 mA) | Same speed and voltage, but significantly lower standby current; different pinout and package mechanicals | Best for new designs prioritizing ultra-low quiescent power, provided PCB layout accommodates SOP-32 |
Compared with CY62128EV30LL-45ZSXIT and AS6C1008-20PCN, the IDT71024S20YI8 uniquely combines industrial temperature range, proven SOJ-32 reliability in vibration-prone environments, and direct TTL interoperability-making it optimal for drop-in replacement in legacy 5 V systems where board space and thermal management constrain alternatives.
Availability
IDT71024S20YI8 is available at Aetrix Electronics and suitable for industrial automation, legacy microcontroller upgrades, and test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for IDT71024S20YI8 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 IoT applications.
The IDT71024S20YI8 belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for reliable, no-refresh memory expansion in 5 V industrial control and instrumentation systems.
FAQ
What is the operating voltage range for the IDT71024S20YI8?
The IDT71024S20YI8 operates from a single 5.0 V supply with a specified range of 4.5 V to 5.5 V. This tolerance ensures compatibility with standard TTL-regulated power rails and accommodates typical ripple and droop in industrial power supplies without requiring additional regulation.
Does the IDT71024S20YI8 require a clock or refresh signal?
No, the IDT71024S20YI8 is a fully static RAM and requires neither a clock nor periodic refresh cycles. Its CMOS latch-based memory cells retain data indefinitely as long as power is applied, simplifying system timing design and eliminating refresh overhead in microcontroller or FPGA-based systems.
What is the function of the two chip select inputs (CS1 and CS2) on the IDT71024S20YI8?
The IDT71024S20YI8 uses CS1 (active-low) and CS2 (active-high) together to enable memory access-both must be asserted simultaneously. This dual-select architecture supports hierarchical decoding in multi-bank memory systems and prevents partial selection glitches that could corrupt data during address transitions.
Can the IDT71024S20YI8 be used in commercial-temperature applications?
Yes, the IDT71024S20YI8 is rated for industrial temperature (–40°C to +85°C), which fully encompasses the commercial range (0°C to +70°C). Its qualification across the wider range ensures margin and reliability in commercial applications exposed to elevated ambient temperatures or airflow-limited enclosures.
Is the IDT71024S20YI8 pin-compatible with other speed grades in the IDT71024S family?
Yes, all IDT71024S variants-including IDT71024S12YI8, IDT71024S15YI8, and IDT71024S20YI8-share identical 32-pin SOJ (PBG32) packaging and pinout. Speed grade changes require only timing parameter updates in system firmware or hardware wait-state logic, with no PCB modification needed.
IDT71024S20YI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- 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:
- 32-SOJ
IDT71024S20YI8 FAQ
1.How can I place an order for IDT71024S20YI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71024S20YI8 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 IDT71024S20YI8 reliable?
The price and inventory of IDT71024S20YI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71024S20YI8 is usually 5 days.
3.What payment methods are accepted for IDT71024S20YI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71024S20YI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71024S20YI8?
IDT71024S20YI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71024S20YI8 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 IDT71024S20YI8?
For technical support, including IDT71024S20YI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71024S20YI8 requirements.
6.How does Aetrix verify that IDT71024S20YI8 is sourced from the original manufacturer or authorized distributors?
All IDT71024S20YI8 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 IDT71024S20YI8 meets industry standards.
7.What is the process for return or replacement of IDT71024S20YI8?
All IDT71024S20YI8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT71024S20YI8, 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 IDT71024S20YI8 part is unused and in its original packaging.
Return procedure for IDT71024S20YI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71024S20YI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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