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Renesas IDT71024S20TY8
- Part No.:
- IDT71024S20TY8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
IDT71024S20TY8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,316
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Product details
Overview
IDT71024S20TY8 from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 20 ns read/write cycle time, TTL-compatible I/O, and dual chip select plus output enable control. It operates from a single +5.0 V ±10% supply across commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges, and is used in legacy embedded controllers, industrial PLCs, and real-time data buffering systems requiring asynchronous, no-refresh memory.
For engineers reviewing the IDT71024S20TY8 datasheet, IDT71024S20TY8 pinout, IDT71024S20TY8 application, or IDT71024S20TY8 equivalent, key selection criteria include guaranteed 20 ns access time, SOJ-32 package compatibility, low standby current (ISB1 = 10 mA), and full TTL-level interface compliance without level-shifting.
Technical Context
The IDT71024S20TY8 implements fully static asynchronous circuitry-no clocks or refresh cycles required-and uses dual active-low chip selects (CS1, CS2) with independent output enable (OE) for flexible memory banking and bus isolation. Its bidirectional I/O pins support direct TTL interfacing with 0.4 V VOL and 2.4 V VOH under load.
It features three power states: active read/write (ICC = 140 mA max), TTL-level standby (ISB = 40 mA), and deep CMOS-level standby (ISB1 = 10 mA), enabling dynamic power management in battery-sensitive or thermally constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits); supports byte-wide parallel data access without multiplexing |
| Access Time (tAA) | 20 ns max; determines minimum address-to-data valid delay in read operations |
| Read Cycle Time (tRC) | 20 ns max; sets shortest interval between successive read cycles |
| Supply Voltage | +5.0 V ±10% (4.5–5.5 V); compatible with legacy 5 V logic rails and avoids need for voltage regulators |
| Operating Temperature | –40°C to +85°C (industrial grade); validated for use in factory automation and outdoor control cabinets |
| Standby Current (ISB1) | 10 mA max at VCC max and f = 0; enables ultra-low-power hold mode during system sleep |
| I/O Interface | TTL-compatible inputs/outputs; eliminates external level translators when interfacing with 74LS/ALS logic or microcontrollers |
Pinout & Package
Package: 32-pin Plastic SOJ (300-mil width, PJG32 footprint). Pin pitch: 0.050", body width: 0.300", compliant with JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus; A0–A16 decode 128K locations (217 = 131,072); A16 is MSB |
| I/O0–I/O7 | Bidirectional Data I/O | 8-bit parallel data path; direction controlled by WE and CS states; TTL-compatible drive strength |
| CS1, CS2 | Chip Select Inputs | Active-low enables; both must be asserted (CS1 = L, CS2 = H) for read/write; supports memory bank partitioning |
| OE | Output Enable | Active-low; gates output drivers independently of CS; enables bus sharing with other peripherals |
| WE | Write Enable | Active-low; controls write latching; high = read mode, low = write mode |
| VCC, GND | Power Supply | Single +5 V supply; decoupling required per JEDEC SOJ layout guidelines to meet AC timing |
| NC | No Connect | Pin 1 (top-left corner, marked "1") is NC; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Static Operation | No clock, no refresh, no wait states-simplifies timing design in microcontroller-based systems |
| Dual Chip Select Architecture | CS1 and CS2 allow hierarchical memory mapping (e.g., CS1 for main RAM, CS2 for peripheral registers) |
| Fast Output Enable (tOE = 8 ns) | Enables rapid bus arbitration and multi-master sharing without added glue logic |
| Low-Power Standby Modes | ISB1 = 10 mA at CMOS-level deselect ensures <100 mW standby dissipation in compact enclosures |
| SOJ-32 Footprint Compatibility | PJG32 package matches industry-standard 300-mil SOJ socket layouts, supporting drop-in replacement in legacy PCBs |
Applications
| Industrial PLC Data Buffer | Legacy Microcontroller Code Memory |
|---|---|
|
Use Scenario: Real-time I/O scanning in programmable logic controllers where deterministic memory access latency is critical for scan-cycle consistency. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state instruction/data storage for 8051- or Z80-based CPU modules. Use Value: 20 ns tAA and tRC guarantee sub-50 ns worst-case memory access, meeting 20 kHz PLC scan rate requirements without pipeline stalls. |
Use Scenario: Non-volatile program storage expansion in retro-computing hardware and educational development boards using vintage CPUs. IC Role / Device Role / Timing Role: Byte-wide code/data RAM mapped into upper memory space via address decoding logic. Use Value: TTL-compatible I/O and 5 V operation eliminate level shifters, reducing BOM count and board area in through-hole designs. |
| Medical Instrument Parameter Cache | Avionics Sensor Data FIFO |
|
Use Scenario: Temporary storage of calibration coefficients and real-time sensor readings in Class II medical devices operating under IEC 62304. IC Role / Device Role / Timing Role: High-reliability static RAM holding volatile configuration data during power transitions and watchdog resets. Use Value: Industrial-grade temperature range (–40°C to +85°C) and ISB1 ≤10 mA ensure stable retention during thermal cycling in sealed enclosures. |
Use Scenario: First-in-first-out buffering of inertial measurement unit (IMU) outputs in certified avionics subsystems. IC Role / Device Role / Timing Role: Asynchronous buffer stage between analog front-end and ARINC 429 protocol engine. Use Value: Dual CS architecture allows seamless handoff between primary and backup sensor channels without bus contention or timing glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62128EV30LL-45ZXC | 512K × 8-bit, 45 ns access, 3.3 V only, SOIC-32 package | Higher density but slower speed and incompatible voltage; requires level translation in 5 V systems | Select only if migrating to 3.3 V architecture and needing >128K capacity |
| AS6C1008-20TIN | 128K × 8-bit, 20 ns access, 5 V, TSOP-32 package (not SOJ) | Same timing and voltage but different footprint; requires PCB redesign for SOJ-to-TSOP conversion | Choose when board space constraints favor TSOP and rework is acceptable |
Compared with CY62128EV30LL-45ZXC and AS6C1008-20TIN, the IDT71024S20TY8 uniquely delivers 20 ns performance in a 300-mil SOJ-32 package at 5 V, making it the only drop-in solution for legacy industrial PCBs requiring no layout change or voltage rail modification.
Availability
IDT71024S20TY8 is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller systems, and medical instrumentation requiring stable component supply, long-lifecycle support, and verified SOJ-32 footprint compatibility.
Supply support for IDT71024S20TY8 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 IDT71024S20TY8 belongs to Renesas' legacy high-speed CMOS SRAM product line, designed specifically for cost-sensitive, reliability-critical embedded systems requiring pin-compatible 5 V memory upgrades without architectural changes.
FAQ
What is the operating voltage range for the IDT71024S20TY8?
The IDT71024S20TY8 operates from a single +5.0 V supply with a tolerance of ±10%, meaning its valid range is 4.5 V to 5.5 V. This matches standard TTL logic rails and eliminates the need for dedicated voltage regulation in legacy 5 V systems. All DC and AC specifications-including tAA, ICC, and VOL-are guaranteed across this full range per the Renesas datasheet revision Mar. 30, 2021.
Does the IDT71024S20TY8 require refresh circuitry or clock signals?
No, the IDT71024S20TY8 uses fully static CMOS architecture and requires no refresh cycles, clocks, or wait states. Its operation is purely asynchronous-address and control signals directly determine read/write behavior. This simplifies integration with microcontrollers lacking DRAM controllers and reduces system-level timing complexity compared to dynamic RAM solutions.
What is the function of the NC pin on the IDT71024S20TY8?
Pin 1 of the IDT71024S20TY8 is designated NC (No Connect) and must remain unconnected in all applications. According to the official Renesas datasheet (Figure "Pin Configuration", page 4), this pin has no internal connection and serves only as a mechanical alignment marker. Soldering or routing to Pin 1 violates the device's electrical specification and may cause functional failure.
Can the IDT71024S20TY8 be used in industrial temperature environments?
Yes, the IDT71024S20TY8 is qualified for industrial temperature operation from –40°C to +85°C. The "I" suffix in its ordering code (e.g., TYGI8) explicitly denotes industrial grade, and all AC/DC parameters-including tAA = 20 ns, ISB1 = 10 mA, and VIH/VIL thresholds-are guaranteed across this full range per Table 5 and Table 7 of the datasheet.
How does the dual chip select (CS1/CS2) architecture benefit system design?
The dual chip select (CS1/CS2) architecture of the IDT71024S20TY8 enables hierarchical memory decoding: CS1 can serve as primary enable while CS2 acts as secondary qualifier, allowing flexible bank selection without additional logic gates. For example, CS1 may be tied to address decoder output for 128K blocks, while CS2 selects between mirrored regions or peripheral registers-reducing gate count and improving signal integrity over single-CS alternatives.
IDT71024S20TY8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-BSOJ (0.300", 7.62mm 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
IDT71024S20TY8 FAQ
1.How can I place an order for IDT71024S20TY8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71024S20TY8 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 IDT71024S20TY8 reliable?
The price and inventory of IDT71024S20TY8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71024S20TY8 is usually 5 days.
3.What payment methods are accepted for IDT71024S20TY8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71024S20TY8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71024S20TY8?
IDT71024S20TY8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71024S20TY8 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 IDT71024S20TY8?
For technical support, including IDT71024S20TY8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71024S20TY8 requirements.
6.How does Aetrix verify that IDT71024S20TY8 is sourced from the original manufacturer or authorized distributors?
All IDT71024S20TY8 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 IDT71024S20TY8 meets industry standards.
7.What is the process for return or replacement of IDT71024S20TY8?
All IDT71024S20TY8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT71024S20TY8, 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 IDT71024S20TY8 part is unused and in its original packaging.
Return procedure for IDT71024S20TY8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71024S20TY8 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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