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Renesas 71024S20YG
- Part No.:
- 71024S20YG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71024S20YG.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,902
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Product details
Overview
71024S20YG from Renesas Electronics is a 128K × 8-bit high-speed CMOS static RAM with 20 ns read/write cycle time, 5 V single-supply operation, TTL-compatible I/O, and industrial-grade temperature range (–40°C to +85°C). It serves as asynchronous main memory or buffer in embedded controllers, legacy industrial PLCs, and test equipment requiring deterministic access without refresh.
For engineers reviewing the 71024S20YG datasheet, 71024S20YG pinout, 71024S20YG application, or 71024S20YG equivalent, key selection criteria include its 20 ns tRC/tWC timing, dual chip select architecture with independent OE control, SOJ-32 400-mil package compatibility, and low ISB1 standby current of 10 mA at full CMOS-level deselect.
Technical Context
The 71024S20YG implements fully static asynchronous logic with no clocks or refresh cycles required. Its address decoding supports 17-bit addressing (A0–A16), and bidirectional I/O lines (I/O0–I/O7) operate under TTL voltage thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) with 5 V supply.
Two independent chip selects (CS1 active-low, CS2 active-high) enable hierarchical memory mapping, while OE controls output enable independently of write operations-allowing simultaneous read/write arbitration in multi-master bus systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), fixed asynchronous SRAM array |
| Access/Cycle Time | 20 ns max tAA and tRC - guarantees worst-case latency for real-time control loops |
| Supply Voltage | 4.5 V to 5.5 V - compatible with legacy 5 V TTL/CMOS system rails |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation and outdoor instrumentation |
| Standby Current | 10 mA max ISB1 - enables low-power sleep mode when both CS1 ≥ VHC and CS2 ≤ VLC |
| I/O Compatibility | TTL input thresholds and output drive (VOH ≥ 2.4 V @ –4 mA, VOL ≤ 0.4 V @ 8 mA) |
| Package | 32-pin 400-mil Plastic SOJ (PBG32) - surface-mount, JEDEC-standard footprint |
Pinout & Package
71024S20YG is housed in a 32-pin Plastic SOJ (Small Outline J-lead) package with 400-mil body width (PBG32), designed for wave or reflow soldering on industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit unidirectional address bus; A16 enables full 128K addressing |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; high-impedance when CS1/CS2 inactive or OE high |
| CS1 | Chip Select 1 (active-low) | Primary enable; device selected only when CS1 = L AND CS2 = H |
| CS2 | Chip Select 2 (active-high) | Secondary enable; must be high for selection - supports bank decoding |
| OE | Output Enable (active-low) | Controls output drivers independently of WE; allows read-before-write sequences |
| WE | Write Enable (active-low) | Initiates write cycle when CS1 = L, CS2 = H, and WE = L |
| VCC | Power Supply | +5 V ±10 % supply rail; decoupling required per JEDEC SOJ guidelines |
| GND | Ground Reference | Signal and power ground return; dedicated pin (Pin 16) minimizes noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Dual Chip Select Architecture | CS1 (active-low) and CS2 (active-high) allow hierarchical memory banking without external logic |
| Independent Output Enable | OE pin enables read operations even during write cycles - critical for bus arbitration in multi-processor systems |
| Low-Power Full Standby Mode | ISB1 = 10 mA max when CS1 ≥ VHC and CS2 ≤ VLC - reduces system power in idle states |
| TTL-Compatible Interface | Direct connection to legacy 5 V microcontrollers and FPGAs without level-shifting circuitry |
| No Refresh or Clock Required | Fully static design eliminates timing-critical refresh overhead - simplifies firmware and timing budgets |
Applications
| Industrial PLC Memory Buffer | Legacy Test Equipment Data Capture |
|---|---|
Use Scenario: Storing real-time I/O scan data between CPU cycles in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous SRAM buffer holding 128K bytes of process variable history with deterministic 20 ns access. Use Value: Eliminates wait states for 80C188/80C186-based controllers and avoids DRAM refresh jitter in cyclic executive firmware. | Use Scenario: Capturing high-speed analog waveform samples from digitizers in benchtop oscilloscopes and signal analyzers. IC Role / Device Role / Timing Role: High-reliability, non-refreshing memory staging raw ADC data before DSP transfer via ISA or VME bus. Use Value: Guarantees 20 ns read/write cycle consistency across –40°C to +85°C ambient - essential for calibrated measurement accuracy. |
| Avionics Maintenance Terminal RAM | Ruggedized HMI Display Controller |
Use Scenario: Supporting diagnostic boot code and configuration tables in airborne line-replaceable units (LRUs) with extended thermal cycling. IC Role / Device Role / Timing Role: Non-volatile-configurable SRAM used for fast-access configuration storage and runtime scratchpad in DO-254-compliant modules. Use Value: Industrial temp grade and Pb-free (Green) compliance meet RTCA/DO-160E environmental stress requirements. | Use Scenario: Serving as frame buffer and command queue memory in operator interface panels deployed in oilfield SCADA cabinets. IC Role / Device Role / Timing Role: Dual-CS decoded memory bank enabling concurrent GUI rendering and serial protocol stack execution on 8-bit MCUs. Use Value: SOJ-32 400-mil package withstands mechanical shock and thermal cycling better than TSOP in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62128EV30LL-70ZXC | 5 V, 128K × 8, 70 ns access, SOJ-32, but lower speed grade and higher ISB (25 mA) | Suitable only for non-real-time buffering where >70 ns latency is acceptable | Select only if cost sensitivity outweighs timing performance and power constraints |
| AS6C1008-20TIN | 5 V, 128K × 8, 20 ns access, same SOJ-32 package, but commercial temp only (0°C to +70°C) | Lacks industrial temperature qualification - unsuitable for uncontrolled ambient deployments | Choose only for indoor, climate-controlled applications with strict 20 ns timing needs |
Compared with CY62128EV30LL-70ZXC and AS6C1008-20TIN, the 71024S20YG uniquely delivers 20 ns performance *plus* industrial temperature rating *plus* 10 mA ISB1 in a single SOJ-32 package - making it the only option meeting all three requirements simultaneously for ruggedized embedded designs.
Availability
71024S20YG is available at Aetrix Electronics and suitable for industrial PLCs, avionics maintenance terminals, and ruggedized HMI displays requiring stable component supply across extended product lifecycles.
Supply support for 71024S20YG 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 71024S20YG belongs to Renesas' legacy high-speed CMOS SRAM product line, engineered specifically for deterministic, low-latency memory in industrial control and test instrumentation where refresh-free operation and wide temperature tolerance are mandatory.
FAQ
What is the maximum guaranteed access time for the 71024S20YG?
The 71024S20YG has a maximum guaranteed address access time (tAA) of 20 ns across the full industrial temperature range (–40°C to +85°C) and supply voltage (4.5 V to 5.5 V). This value is production-tested and specified in the AC Electrical Characteristics table under the "71024S20" speed grade column. The 71024S20YG maintains this timing without derating under worst-case conditions.
Does the 71024S20YG require a clock or refresh signal to operate?
No, the 71024S20YG uses fully static CMOS circuitry and requires no clock, refresh, or periodic access to retain data. It operates asynchronously - data remains valid as long as VCC is applied and the device is not deselected. This eliminates timing-critical refresh overhead in firmware and simplifies integration with microcontrollers lacking DRAM controllers.
What package type and dimensions does the 71024S20YG use?
The 71024S20YG is supplied in a 32-pin Plastic SOJ (Small Outline J-lead) package with 400-mil body width (PBG32). Its lead pitch is 0.050 inch (1.27 mm), and overall body size is 0.400 inch × 0.276 inch (10.16 mm × 7.01 mm). This JEDEC-standard SOJ footprint ensures compatibility with legacy industrial PCB assembly processes.
Can the 71024S20YG be used with a 3.3 V system?
No, the 71024S20YG is strictly a 5 V device with VIH minimum of 2.2 V and VIL maximum of 0.8 V - designed for TTL/5 V CMOS logic families. It does not support 3.3 V operation, and applying 3.3 V to VCC will result in undefined behavior or failure to meet timing specifications. For 3.3 V systems, consider modern low-voltage SRAM alternatives outside the 71024 family.
How does the dual chip select (CS1/CS2) architecture of the 71024S20YG improve system design?
The 71024S20YG's CS1 (active-low) and CS2 (active-high) pins enable hierarchical memory decoding without external gates - for example, using CS2 to select a memory bank and CS1 to enable individual devices within it. This reduces address decoder complexity, improves signal integrity by minimizing fanout, and supports clean partitioning of memory maps in multi-SRAM systems - directly enhancing reliability in industrial control hardware using the 71024S20YG.
71024S20YG 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
71024S20YG FAQ
1.How can I place an order for 71024S20YG through Aetrix?
Please submit a Request for Quotation (RFQ) for 71024S20YG 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 71024S20YG reliable?
The price and inventory of 71024S20YG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71024S20YG is usually 5 days.
3.What payment methods are accepted for 71024S20YG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71024S20YG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71024S20YG?
71024S20YG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71024S20YG 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 71024S20YG?
For technical support, including 71024S20YG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71024S20YG requirements.
6.How does Aetrix verify that 71024S20YG is sourced from the original manufacturer or authorized distributors?
All 71024S20YG 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 71024S20YG meets industry standards.
7.What is the process for return or replacement of 71024S20YG?
All 71024S20YG units undergo pre-shipment inspection (PSI). If there is an issue with 71024S20YG, 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 71024S20YG part is unused and in its original packaging.
Return procedure for 71024S20YG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71024S20YG Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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