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Renesas 71024S12YG
- Part No.:
- 71024S12YG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
71024S12YG.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,012
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Product details
Overview
71024S12YG from Renesas Electronics is a 128K × 8-bit (1 Mbit) high-speed CMOS static RAM with 12 ns access time, TTL-compatible I/O, single 5 V supply operation, and industrial-grade temperature range (–40°C to +85°C). It serves as fast, fully static main or cache memory in embedded controllers and real-time data acquisition systems.
For engineers reviewing the 71024S12YG datasheet, 71024S12YG pinout, 71024S12YG application, or 71024S12YG equivalent, key selection criteria include guaranteed 12 ns read cycle time, dual chip select architecture with independent OE control, low-power standby modes (ISB1 = 10 mA), and SOJ-32 (400 mil) packaging for legacy board compatibility.
Technical Context
The 71024S12YG implements fully asynchronous static RAM architecture with no clocks or refresh required. Its dual CS inputs (CS1, CS2) enable hierarchical memory banking or interleaved addressing, while OE allows output gating independent of chip selection - critical for bus sharing in multi-master systems.
All I/Os are bidirectional and TTL-compatible (VIH = 2.2 V min, VIL = 0.8 V max), supporting direct interface with 5 V microcontrollers and FPGAs. Standby current is split into two modes: ISB (40 mA, TTL-level deselect) and ISB1 (10 mA, CMOS-level full standby), enabling precise power-state management in battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 8-bit (1,048,576 bits), byte-wide parallel interface |
| Access Time (tAA) | 12 ns max - enables ≤83 MHz burst read throughput in synchronous bus designs |
| Supply Voltage | 5.0 V ±10% (4.5–5.5 V) - compatible with standard 5 V logic rails without regulation |
| Operating Temperature | –40°C to +85°C - qualified for industrial control and transportation electronics |
| Standby Current (ISB1) | 10 mA max at VCC = 5.5 V - supports low-power sleep states without external power gating |
| I/O Compatibility | TTL input thresholds and output drive (VOH ≥2.4 V @ –4 mA, VOL ≤0.4 V @ 8 mA) |
| Package | 32-pin Plastic SOJ, 400 mil width (PBG32) - matches JEDEC MS-012AC footprint |
Pinout & Package
32-pin Plastic SOJ (400 mil body width, PBG32 package), gull-wing leads, JEDEC MS-012AC compliant. Pin 1 marked by notch or dot; top-view orientation shown in datasheet Figure 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (217 = 131,072 locations); A16 enables full 128K decoding |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; high-impedance when CS1/CS2 inactive or OE high |
| CS1, CS2 | Chip Select Inputs | Active-low CS1 and active-high CS2 provide 2-input decode logic for memory mapping flexibility |
| OE | Output Enable | Active-low; enables outputs independently of CS state - essential for shared-bus arbitration |
| WE | Write Enable | Active-low; controls write latching; high during reads, low during writes |
| VCC, GND | Power Supply | Single 5 V supply; decoupling required per JEDEC SOJ layout guidelines |
| NC | No Connect | Pin 1 (top-left corner) is NC - must remain unconnected per datasheet Note 1 |
Key Features
| Feature | Design Value |
|---|---|
| 12 ns guaranteed access time | Meets timing closure for 50–66 MHz CPU buses without wait states in simple glueless interfaces |
| Dual chip select (CS1/CS2) | Enables 2:1 memory bank selection or hierarchical decode without external logic |
| Separate OE control | Allows output disable during chip deselection - prevents bus contention in multi-device systems |
| CMOS-level full standby (ISB1) | Reduces quiescent current to 10 mA - extends hold time in battery-backed SRAM applications |
| TTL-compatible I/O | Eliminates level-shifting components when interfacing with legacy 5 V microcontrollers and PLDs |
Applications
| Industrial PLC Memory Buffer | Avionics Data Logger Cache |
|---|---|
Use Scenario: Real-time I/O scanning and cyclic program execution in programmable logic controllers requiring deterministic memory access. IC Role / Device Role / Timing Role: Primary working memory for ladder logic execution engine; accessed at 12 ns latency per instruction fetch. Use Value: Guaranteed 12 ns tAA ensures sub-microsecond response to sensor interrupts without pipeline stalls. | Use Scenario: High-integrity flight parameter buffering in black-box recorders where data loss during power interruption is unacceptable. IC Role / Device Role / Timing Role: Non-refreshing cache between ADC front-end and flash storage controller; retains data during brownout events. Use Value: Fully static operation and ISB1 = 10 mA allow >100 ms hold-up time using small backup capacitors. |
| Medical Imaging Frame Store | Test Equipment Pattern Generator |
Use Scenario: Temporary storage of digitized ultrasound or X-ray frames prior to compression and transmission. IC Role / Device Role / Timing Role: Dual-port-capable buffer (via CS/OE sequencing) supporting simultaneous acquisition and readout. Use Value: tCLZ = 3 ns and tOHZ = 5 ns enable clean bus turnaround for pipelined pixel streaming at 80 MB/s. | Use Scenario: Vector pattern storage in automated test equipment generating high-speed digital stimulus waveforms. IC Role / Device Role / Timing Role: Static lookup table for waveform synthesis; addressed by counter-driven A0–A16 bus. Use Value: 12 ns tRC supports 83 MHz pattern update rate - sufficient for 100 Mbps serial interface testing. |
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 supply, 32-pin TSOP-II - slower but lower voltage and modern package | Targets newer 3.3 V systems; not drop-in due to voltage and timing mismatch | Select only if migrating to 3.3 V design with relaxed timing; requires PCB redesign and level shifters |
| AS6C1008-12TIN | 12 ns access, 5 V supply, 32-pin SOJ - identical speed and voltage, but 100% RoHS-compliant green process | Direct functional replacement with same timing, pinout, and thermal profile | Preferred for new production where lead-free compliance and long-term availability are mandatory |
Compared with CY62128EV30LL-45ZSXIT, the 71024S12YG delivers 3.75× faster access at 5 V but lacks RoHS-2 compliance; versus AS6C1008-12TIN, it shares identical speed and voltage but differs in endurance rating and manufacturer support lifecycle.
Availability
71024S12YG is available at Aetrix Electronics and suitable for industrial PLCs, avionics data loggers, and medical imaging frame stores requiring stable component supply across extended product lifecycles.
Supply support for 71024S12YG 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.
The 71024S12YG belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for 5 V embedded systems demanding deterministic, zero-refresh memory performance in harsh environments.
FAQ
What is the maximum operating frequency supported by the 71024S12YG?
The 71024S12YG does not use a clock; its performance is defined by timing parameters. With tRC = 12 ns, it supports up to 83 MHz effective cycle rate in read/write operations. This assumes all address and control signals meet setup/hold requirements per datasheet Table 9 - actual system frequency depends on bus controller timing margins and PCB layout.
Does the 71024S12YG require refresh circuitry or external clocks?
No, the 71024S12YG is a fully static RAM and requires neither refresh cycles nor clocks. Its CMOS latch-based memory cells retain data indefinitely as long as VCC is applied within specification (4.5–5.5 V) and ambient temperature remains within –40°C to +85°C. This eliminates refresh overhead in microcontroller-based systems.
Can the 71024S12YG be used with 3.3 V microcontrollers?
The 71024S12YG is specified for 5 V operation only (VCC = 4.5–5.5 V) and has TTL-compatible I/O thresholds. Direct connection to 3.3 V logic risks violating VIH/VIL limits and may cause unreliable operation. Level translation (e.g., TXB0108) or a 3.3 V-compatible SRAM like AS6C1008-12TIN is required for 3.3 V systems.
What is the function of the NC pin on the 71024S12YG?
Pin 1 of the 71024S12YG is designated NC (No Connect) per datasheet Figure 1 and Note 1. It must remain unconnected on the PCB - routing traces to or placing solder on this pin violates the device's electrical and reliability specifications and may cause undefined behavior or accelerated failure.
How does the dual chip select (CS1/CS2) architecture improve system design?
The 71024S12YG's CS1 (active-low) and CS2 (active-high) inputs allow flexible memory mapping: they can implement 2:1 bank selection, enable hierarchical decode with minimal external logic, or support "chip-enable windowing" for partial address space activation. This reduces gate count in FPGA/CPLD-based address decoders and simplifies expansion in multi-SRAM systems.
71024S12YG 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:
- 12ns
- Access Time:
- 12 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
71024S12YG FAQ
1.How can I place an order for 71024S12YG through Aetrix?
Please submit a Request for Quotation (RFQ) for 71024S12YG 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 71024S12YG reliable?
The price and inventory of 71024S12YG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71024S12YG is usually 5 days.
3.What payment methods are accepted for 71024S12YG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71024S12YG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71024S12YG?
71024S12YG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71024S12YG 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 71024S12YG?
For technical support, including 71024S12YG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71024S12YG requirements.
6.How does Aetrix verify that 71024S12YG is sourced from the original manufacturer or authorized distributors?
All 71024S12YG 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 71024S12YG meets industry standards.
7.What is the process for return or replacement of 71024S12YG?
All 71024S12YG units undergo pre-shipment inspection (PSI). If there is an issue with 71024S12YG, 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 71024S12YG part is unused and in its original packaging.
Return procedure for 71024S12YG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71024S12YG Tags
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AT24C02C-XHM-T
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