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Renesas IDT71024S20Y
- Part No.:
- IDT71024S20Y
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
IDT71024S20Y.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,947
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Product details
Overview
IDT71024S20Y from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 20 ns access time, TTL-compatible I/O, dual chip select (CS1/CS2), and output enable (OE). It operates from a single +5.0 V ±10% supply across industrial temperature (–40°C to +85°C), supports asynchronous read/write cycles without clocks or refresh, and is used in legacy industrial controllers and embedded memory buffers.
For engineers reviewing the IDT71024S20Y datasheet, IDT71024S20Y pinout, IDT71024S20Y application, or IDT71024S20Y equivalent, key selection criteria include verified 20 ns tAA/tRC timing, SOJ-32 package compatibility, industrial-grade standby current (ISB = 40 mA, ISB1 = 10 mA), and direct replacement feasibility for legacy 1-Mbit SRAM designs requiring TTL-level signaling and dual CS control.
Technical Context
The IDT71024S20Y implements fully static asynchronous architecture with no clock or refresh circuitry. Its bidirectional I/Os are TTL-compatible (VIH ≥ 2.2 V, VIL ≤ 0.8 V), and it uses two independent chip selects (CS1 active-low, CS2 active-high) plus OE to manage output enable and device deselection states.
It supports three distinct power modes: active read/write (ICC = 140 mA max), TTL-level standby (ISB = 40 mA), and CMOS-level full standby (ISB1 = 10 mA). Timing is defined by guaranteed AC parameters including tAA = 20 ns, tRC = 20 ns, tOE = 8 ns, and tWHZ = 8 ns - all specified over –40°C to +85°C at VCC = 4.5–5.5 V.
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 - defines minimum address-to-data valid delay in read cycles |
| Cycle Time (tRC) | 20 ns max - sets minimum interval between successive read or write operations |
| Supply Voltage | +5.0 V ±10% (4.5–5.5 V) - single-rail operation compatible with legacy 5 V logic systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Standby Current (ISB1) | 10 mA max - ultra-low power CMOS-level standby mode activated when CS1 ≥ VHC or CS2 ≤ VLC |
| I/O Compatibility | TTL - ensures direct interfacing with 74LS/74F logic families without level shifters |
Pinout & Package
Package: 32-pin Plastic SOJ (Small Outline J-Lead), available in both 300-mil (PJG32) and 400-mil (PBG32) body widths. Pin 1 index marked per JEDEC standard; lead finish is lead-free (Green) per ordering code YG/YGI.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (A0 LSB to A16 MSB) selecting one of 131,072 bytes |
| 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 | CS1 active-low, CS2 active-high - both must be asserted for device enable; enables hierarchical memory decoding |
| OE | Output Enable | Active-low control of output drivers; allows shared bus operation with other devices |
| WE | Write Enable | Active-low signal initiating write cycle; latches data on rising edge when CS active |
| VCC, GND | Power Supply | Single +5 V supply and ground - no separate I/O or core voltage rails required |
| NC | No Connect | Pin 1 is NC - must remain unconnected per datasheet; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Dual Chip Select Architecture | CS1 (active-low) and CS2 (active-high) allow flexible memory mapping in multi-chip systems without external logic |
| CMOS-Level Full Standby Mode | ISB1 = 10 mA max enables ultra-low-power sleep state when CS1/CS2 inactive at CMOS thresholds |
| TTL-Compatible I/O | Direct interface with legacy 5 V logic families eliminates need for level translators or bus buffers |
| Asynchronous Static Operation | No clocks, no refresh, no wait states - simplifies timing-critical control system designs |
| Industrial Temperature Qualification | Guaranteed 20 ns timing and full DC/AC specs over –40°C to +85°C without derating |
Applications
| Industrial PLC Memory Buffer | Legacy Avionics Data Cache |
|---|---|
Use Scenario: Real-time I/O scanning and program execution in programmable logic controllers where deterministic memory latency is critical. IC Role / Device Role / Timing Role: Primary 1-Mbit static RAM buffer storing ladder logic variables and process image data with 20 ns read/write timing. Use Value: Eliminates DRAM refresh overhead and guarantees worst-case 20 ns access for scan-cycle determinism in safety-critical control loops. | Use Scenario: Non-volatile configuration storage and transient telemetry buffering in certified airborne computing modules. IC Role / Device Role / Timing Role: High-reliability SRAM for flight-critical data staging during sensor acquisition bursts and real-time processing windows. Use Value: Industrial temp rating and proven CMOS reliability meet DO-254 hardware assurance requirements for Level A/B functions. |
| Medical Imaging Frame Store | Test Equipment Pattern Memory |
Use Scenario: Temporary storage of digitized X-ray or ultrasound frames prior to compression and transfer in portable diagnostic devices. IC Role / Device Role / Timing Role: Byte-accessible frame buffer supporting burst reads/writes synchronized to ADC/DAC clocks. Use Value: TTL-compatible I/O and 20 ns cycle time enable direct connection to legacy 8-bit microcontrollers and FPGA glue logic. | Use Scenario: Storage of stimulus/response patterns in automated test equipment (ATE) for semiconductor wafer probing. IC Role / Device Role / Timing Role: High-speed pattern memory accessed by vector generator ASICs requiring precise 20 ns timing alignment. Use Value: Dual CS inputs support banked memory expansion up to 2 MB while maintaining strict tAA/tRC compliance across all banks. |
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 - slower but lower voltage and modern package | Targets newer low-power designs; not drop-in due to voltage and timing mismatch | Select only if migrating from 5 V to 3.3 V systems and relaxing timing to ≥45 ns |
| AS6C1008-20ZIN | 20 ns access, +5 V supply, 32-pin SOJ - identical speed and voltage, but single CS and no OE pin | Lacks dual CS and OE control; requires external gating for bus sharing or hierarchical decode | Use only when board layout permits removal of OE/CS2 logic and timing margin allows single-CS timing model |
Compared with CY62128EV30LL-45ZSXIT and AS6C1008-20ZIN, the IDT71024S20Y uniquely delivers industrial-grade 20 ns performance with dual CS and OE in legacy SOJ packaging - making it the only viable option for maintaining timing, voltage, and control-signal compatibility in existing 5 V SRAM-based systems.
Availability
IDT71024S20Y is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy avionics data caches, and medical imaging frame stores requiring stable component supply and long-term obsolescence management.
Supply support for IDT71024S20Y 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 IDT71024S20Y belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for industrial and aerospace applications demanding deterministic 5 V TTL-compatible memory with guaranteed timing over extended temperature ranges.
FAQ
What is the maximum guaranteed access time for IDT71024S20Y?
The IDT71024S20Y has a maximum guaranteed address access time (tAA) of 20 ns and read cycle time (tRC) of 20 ns, both tested and specified over the full industrial temperature range (–40°C to +85°C) at VCC = 4.5–5.5 V. These values are production-tested limits, not characterization-only figures.
Does IDT71024S20Y require a refresh clock or external timing controller?
No, the IDT71024S20Y uses fully static CMOS architecture and requires no refresh clock, timing controller, or wait-state generation. All operations - read, write, and standby - are asynchronous and controlled solely by CS1, CS2, OE, and WE signals per the truth table in the official Renesas datasheet.
What package options are available for IDT71024S20Y?
IDT71024S20Y is offered in 32-pin Plastic SOJ packages: 300-mil width (order code suffix TYG/TYGI) and 400-mil width (suffix YG/YGI), both with lead-free (Green) finish. Pinout and electrical specs are identical across both variants; only mechanical footprint differs.
Can IDT71024S20Y operate with a 3.3 V supply?
No, the IDT71024S20Y is specified exclusively for +5.0 V ±10% (4.5–5.5 V) operation. It is not 3.3 V compatible - applying 3.3 V will result in undefined logic levels, failed timing margins, and potential data corruption. For 3.3 V systems, consider Renesas' CY62128EV family instead.
What is the purpose of the NC pin on IDT71024S20Y?
Pin 1 of the IDT71024S20Y is designated NC (No Connect) and must remain unconnected in PCB layout. It is not internally bonded and serves no electrical function; connecting it may cause unpredictable behavior or damage per Renesas' datasheet guidance.
IDT71024S20Y Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
IDT71024S20Y FAQ
1.How can I place an order for IDT71024S20Y through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71024S20Y 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 IDT71024S20Y reliable?
The price and inventory of IDT71024S20Y are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71024S20Y is usually 5 days.
3.What payment methods are accepted for IDT71024S20Y?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71024S20Y transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71024S20Y?
IDT71024S20Y orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71024S20Y 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 IDT71024S20Y?
For technical support, including IDT71024S20Y datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71024S20Y requirements.
6.How does Aetrix verify that IDT71024S20Y is sourced from the original manufacturer or authorized distributors?
All IDT71024S20Y 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 IDT71024S20Y meets industry standards.
7.What is the process for return or replacement of IDT71024S20Y?
All IDT71024S20Y units undergo pre-shipment inspection (PSI). If there is an issue with IDT71024S20Y, 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 IDT71024S20Y part is unused and in its original packaging.
Return procedure for IDT71024S20Y:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71024S20Y Tags
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AT24C02C-XHM-T
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