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Renesas 71024S20YG8
- Part No.:
- 71024S20YG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71024S20YG8.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,125
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Product details
Overview
71024S20YG8 from Renesas Electronics is a 128K × 8-bit high-speed CMOS static RAM with 20 ns access time, 5 V single-supply operation, TTL-compatible I/O, and industrial temperature range (–40°C to +85°C). It features dual chip selects (CS1/CS2), output enable (OE), and low-power standby modes-used in real-time data buffering for industrial PLCs and legacy embedded controllers.
For engineers reviewing the 71024S20YG8 datasheet, 71024S20YG8 pinout, 71024S20YG8 application, or 71024S20YG8 equivalent, key selection criteria include verified 20 ns read cycle time, SOJ-32 400-mil package compatibility, industrial-grade reliability, and direct replacement readiness in legacy SRAM-based memory subsystems.
Technical Context
The 71024S20YG8 implements fully static asynchronous architecture-no clocks or refresh required-and uses dual-level chip select logic (CS1 active-low, CS2 active-high) to enable flexible memory banking. Its bidirectional TTL-compatible I/O pins support seamless integration with 5 V microcontrollers and FPGAs without level-shifting.
It delivers guaranteed tAA = 20 ns (address access), tRC = 20 ns (read cycle), and tWC = 20 ns (write cycle) across –40°C to +85°C, with ISB1 = 10 mA full-standby current and VOH ≥ 2.4 V / VOL ≤ 0.4 V under load-ensuring robust signal integrity in noise-prone industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), enabling byte-wide data access without multiplexing |
| Access Time (tAA) | 20 ns max - defines minimum address hold before valid data appears on I/O bus |
| Read Cycle Time (tRC) | 20 ns max - sets maximum sustained read rate of 50 MHz for burst transfers |
| Supply Voltage | 5.0 V ± 10% - compatible with legacy 5 V logic families and eliminates need for voltage regulators |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, motor drives, and outdoor instrumentation |
| Standby Current (ISB1) | 10 mA max - enables low-power sleep mode when both CS1 ≥ VHC and CS2 ≤ VLC |
| I/O Compatibility | TTL - ensures direct interface with 74LS/74ALS and early microprocessor buses (e.g., 8086, Z80) |
Pinout & Package
71024S20YG8 is supplied in a 32-pin 400-mil Plastic SOJ (PBG32) package with gull-wing leads, JEDEC-standard footprint, and moisture sensitivity level (MSL) 3 per J-STD-020.
| 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 | CS1 active-low, CS2 active-high - dual-select logic enables bank decoding without external logic |
| OE | Output Enable | Active-low control of output drivers; tOE = 8 ns max ensures fast read gating |
| WE | Write Enable | Active-low write strobe; tWP = 15 ns min guarantees reliable data capture during write cycles |
| VCC, GND | Power Supply | Single 5 V supply; decoupling required within 10 mm of VCC pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Fully static asynchronous operation | No clock, no refresh - simplifies timing design and eliminates DRAM controller overhead |
| Dual chip select architecture | CS1/CS2 combination allows independent enable/disable of memory banks in multi-SRAM systems |
| Industrial temperature qualification | Guaranteed 20 ns performance across –40°C to +85°C - suitable for uncooled industrial enclosures |
| Low-power standby modes | ISB = 40 mA (TTL standby), ISB1 = 10 mA (CMOS standby) - reduces system power in idle states |
| TTL-compatible I/O | Direct interface with legacy 5 V microprocessors and peripheral ICs - no level translators required |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data Cache |
|---|---|
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 128K × 8-byte scratchpad memory holding process variables, register tables, and instruction buffers. Use Value: 20 ns tAA and tRC ensure sub-1 µs memory latency for scan-cycle-critical operations at 50 MHz bus rates. | Use Scenario: Off-chip RAM expansion for 8-bit/16-bit microcontrollers (e.g., 8051, Z80) in medical diagnostic equipment. IC Role / Device Role / Timing Role: External data memory mapped into CPU address space via CS1/CS2 decode logic. Use Value: Dual chip select and OE pin allow precise control of memory windows and eliminate bus contention during interrupt handling. |
| Avionics Data Logger | Test Equipment FIFO Buffer |
Use Scenario: High-reliability non-volatile data capture in airborne flight recorders where extended temperature tolerance is mandatory. IC Role / Device Role / Timing Role: Volatile buffer staging sensor telemetry before EEPROM write; powered continuously during mission. Use Value: Industrial temp grade and 10 mA ISB1 enable stable operation at –40°C cabin start-up and +85°C cruise conditions. | Use Scenario: High-speed acquisition front-end in automated test systems capturing bursts of analog-to-digital samples. IC Role / Device Role / Timing Role: First-in-first-out (FIFO) buffer interfacing ADC output to host processor via parallel bus. Use Value: Bidirectional I/O and 20 ns tOW (output active post-write) support tight timing alignment between sample clock and read strobe. |
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 | 3.3 V supply, 45 ns access, 512K × 8 organization, TSOP-II package | Requires voltage translation for 5 V systems; larger density but slower speed | Select only if migrating to 3.3 V architecture and higher capacity is needed over speed |
| AS6C1008-20PCN | 5 V supply, 20 ns access, 128K × 8, SOP-32 package (300-mil) | Same speed and organization but 300-mil SOJ footprint differs - requires PCB redesign | Consider for new designs where SOP-32 layout is preferred and thermal profile permits |
Compared with CY62128EV30LL-45ZSXIT and AS6C1008-20PCN, the 71024S20YG8 uniquely maintains 5 V TTL compatibility, 400-mil SOJ mechanical fit, and industrial temperature guarantee at 20 ns-making it the only drop-in solution for legacy 5 V industrial boards requiring zero layout change.
Availability
71024S20YG8 is available at Aetrix Electronics and suitable for industrial PLCs, avionics data loggers, and legacy microcontroller-based medical devices requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.
Supply support for 71024S20YG8 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 71024S20YG8 belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for backward-compatible memory upgrades and long-lifecycle industrial systems requiring proven 5 V TTL interoperability.
FAQ
What is the operating temperature range specified for the 71024S20YG8?
The 71024S20YG8 is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all AC and DC parameters including tAA = 20 ns, tRC = 20 ns, and ISB1 = 10 mA max. The device undergoes full characterization and screening per industrial-grade standards, making it suitable for deployment in uncontrolled ambient environments such as factory floors and outdoor control cabinets.
Does the 71024S20YG8 require a clock or refresh signal to operate?
No, the 71024S20YG8 uses fully static CMOS circuitry and requires no clock or refresh signals. Its asynchronous design means data retention and access are controlled solely by address, CS1/CS2, OE, and WE timing-enabling plug-and-play integration with microprocessors like the 8086, Z80, and 68000 that lack dedicated DRAM controllers. This eliminates timing complexity and improves system reliability in deterministic real-time applications.
What package type and pin count does the 71024S20YG8 use?
The 71024S20YG8 is packaged in a 32-pin 400-mil Plastic SOJ (PBG32) with gull-wing leads. This JEDEC-standard package has a 0.050-inch lead pitch and is compatible with wave soldering and reflow profiles defined in IPC-J-STD-020. The "YG8" suffix explicitly denotes the PBG32 variant with tape-and-reel packaging, distinguishing it from the PJG32 (300-mil) version.
How does the dual chip select (CS1/CS2) logic function on the 71024S20YG8?
On the 71024S20YG8, CS1 is active-low and CS2 is active-high; the device enables only when CS1 = L and CS2 = H. This dual-signal architecture allows hierarchical memory decoding-e.g., using CS2 to select a memory bank and CS1 to enable individual devices within it-reducing external gate count versus single-CS designs. Truth table entries confirm that any deviation (e.g., CS1 = H or CS2 = L) forces outputs to high-Z and enters standby mode.
Is the 71024S20YG8 RoHS-compliant and halogen-free?
Yes, the 71024S20YG8 is a Green (halogen-free, RoHS-compliant) device per Renesas' ordering nomenclature-the "G" in YG8 indicates compliance with JEDEC JS709 and IPC-1752 standards. Material content documentation, including exemption status for lead (7a), is available in Renesas' official PPAP package and can be provided upon request for qualifying industrial programs.
71024S20YG8 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
71024S20YG8 FAQ
1.How can I place an order for 71024S20YG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71024S20YG8 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 71024S20YG8 reliable?
The price and inventory of 71024S20YG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71024S20YG8 is usually 5 days.
3.What payment methods are accepted for 71024S20YG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71024S20YG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71024S20YG8?
71024S20YG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71024S20YG8 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 71024S20YG8?
For technical support, including 71024S20YG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71024S20YG8 requirements.
6.How does Aetrix verify that 71024S20YG8 is sourced from the original manufacturer or authorized distributors?
All 71024S20YG8 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 71024S20YG8 meets industry standards.
7.What is the process for return or replacement of 71024S20YG8?
All 71024S20YG8 units undergo pre-shipment inspection (PSI). If there is an issue with 71024S20YG8, 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 71024S20YG8 part is unused and in its original packaging.
Return procedure for 71024S20YG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71024S20YG8 Tags
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