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Renesas IDT71256SA12YGI8
- Part No.:
- IDT71256SA12YGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
IDT71256SA12YGI8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,209
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Product details
Overview
IDT71256SA12YGI8 from Renesas Electronics is a 32K × 8-bit (262,144-bit) high-speed CMOS static RAM operating at 5V, with 12ns access time, industrial temperature range (–40°C to +85°C), TTL-compatible I/O, and single-chip-select architecture. It serves as main or buffer memory in real-time control systems requiring deterministic read/write timing without refresh.
For engineers reviewing the IDT71256SA12YGI8 datasheet, IDT71256SA12YGI8 pinout, IDT71256SA12YGI8 application, or IDT71256SA12YGI8 equivalent, key selection criteria include guaranteed 12ns tAA under industrial conditions, low 15mA ISB1 standby current, TSOP/SOJ package compatibility, and direct TTL-level interfacing with microcontrollers and FPGAs.
Technical Context
The IDT71256SA12YGI8 implements fully static asynchronous circuitry-no clocks or refresh required-and uses dual-control enable logic with independent Chip Select (CS) and Output Enable (OE) inputs to manage data bus contention. Its bidirectional I/O pins support true three-state operation with tOHZ ≤ 6ns and tOLZ = 0ns.
It operates across VCC = 4.5V to 5.5V with VIH ≥ 2.2V and VIL ≤ 0.8V, ensuring robust noise margin in mixed-signal environments. The device supports both CS-controlled and OE-controlled read cycles, and write operations are gated by simultaneous CS and WE assertion per JEDEC-standard SRAM timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), byte-wide parallel interface |
| Access Time (tAA) | 12 ns max - guarantees deterministic read latency for 83 MHz bus handshaking |
| Supply Voltage | 4.5 V to 5.5 V - compatible with legacy 5V TTL and LVTTL logic families |
| Standby Current (ISB1) | 15 mA max - enables ultra-low-power hold mode when CS > VHC |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation and transportation control units |
| I/O Compatibility | TTL-level - directly interfaces with 80Cxx, Z80, and FPGA I/O banks without level shifters |
| Package | 28-pin 300-mil SOJ (PJG28) - surface-mountable with standard reflow profiles |
Pinout & Package
Package: 28-pin 300-mil Plastic SOJ (PJG28), lead pitch 0.05 inches, body width 0.3 inches, compliant with JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word decoding; no internal latching |
| I/O0–I/O7 | Bidirectional Data Bus | True three-state I/O with separate OE/WE control; drives/receives TTL loads directly |
| CS | Chip Select | Active-low enable; deassertion places outputs in high-Z and reduces ICC to ISB1 (15 mA) |
| OE | Output Enable | Active-low; controls output drivers independently of CS for bus sharing |
| WE | Write Enable | Active-low; initiates write cycle when CS = L; defines tWP (8 ns min) and tDW (6 ns min) |
| VCC, GND | Power Supply | Single 5V supply; decoupling required within 10 mm of VCC/GND pins per JEDEC guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Zero-refresh static architecture | Eliminates DRAM-style refresh circuitry and timing constraints in embedded controllers |
| 12ns industrial-grade access | Meets hard real-time response requirements in PLC scan cycles and motor commutation |
| Two-tier standby modes | ISB = 40 mA (TTL-level CS) and ISB1 = 15 mA (CMOS-level CS) for dynamic power scaling |
| TTL-compatible I/O | Direct connection to legacy microprocessor buses (e.g., 8086, 68000) without interface logic |
| Green packaging option | Pb-free, halogen-free SOJ construction compliant with RoHS Directive 2011/65/EU |
Applications
| Industrial PLC Memory Buffer | Legacy Microprocessor System Cache |
|---|---|
Use Scenario: Storing I/O image tables and ladder logic state variables in programmable logic controllers with 10ms scan cycles. IC Role / Device Role / Timing Role: Non-refreshing byte-wide memory mapped at fixed address space; provides sub-15ns read/write turnaround for deterministic scan execution. Use Value: Eliminates external refresh controller overhead and ensures consistent 12ns tAA across –40°C to +85°C ambient. | Use Scenario: Serving as fast scratchpad memory for Z80 or 80C88-based test equipment firmware executing real-time waveform generation. IC Role / Device Role / Timing Role: Parallel memory mapped at 0x0000–0x7FFF; synchronized via WAIT signal derived from tRC (12ns) and tOH (3ns). Use Value: Enables 83 MHz effective bus bandwidth with zero wait states and full TTL-level compatibility. |
| Avionics Data Logger Buffer | Medical Imaging Frame Store |
Use Scenario: Capturing sensor telemetry bursts (e.g., accelerometer, pressure) during aircraft engine health monitoring between ground maintenance cycles. IC Role / Device Role / Timing Role: High-reliability SRAM buffer accepting parallel writes from ADC FIFOs; retains data during brown-out events via low ISB1 (15 mA) hold mode. Use Value: Industrial temp rating and Pb-free SOJ package meet DO-254/DO-160E environmental compliance for airborne hardware. | Use Scenario: Temporary storage of 8-bit grayscale ultrasound frames (512×512) prior to JPEG compression in portable diagnostic devices. IC Role / Device Role / Timing Role: Dual-port accessible via multiplexed address/data bus; supports concurrent read (display path) and write (acquisition path) using CS/OE arbitration. Use Value: 12ns tAA and 6ns tOE ensure pixel-rate throughput up to 83 Mpix/s without frame buffering bottlenecks. |
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 |
|---|---|---|---|
| CY62256ELL-12ZXI | Same 32K×8 organization, 12ns tAA, but 32-pin SOIC package (not pin-compatible); higher ISB (25 mA) | Requires PCB redesign due to 32-pin footprint; better suited for new designs with space for wider SOIC | Select if board layout allows SOIC and lower standby current is not critical |
| AS6C4008-12BIN | 12ns tAA, 32K×8, 28-pin SOJ, but only commercial temp (0°C to +70°C); slightly higher tOHZ (8ns vs. 6ns) | Limited to non-industrial environments; unsuitable for extended outdoor or under-hood deployment | Select only for cost-sensitive commercial equipment with controlled ambient |
Compared with CY62256ELL-12ZXI and AS6C4008-12BIN, the IDT71256SA12YGI8 uniquely delivers industrial-temperature 12ns performance in the compact 28-pin SOJ form factor with the lowest ISB1 (15 mA), making it optimal for space-constrained, thermally demanding embedded systems.
Availability
IDT71256SA12YGI8 is available at Aetrix Electronics and suitable for industrial automation, avionics data acquisition, and medical imaging systems requiring stable component supply, long-term lifecycle support, and verified green material compliance.
Supply support for IDT71256SA12YGI8 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications, with deep expertise in memory, microcontrollers, and analog products.
The IDT71256SA12YGI8 belongs to Renesas' legacy high-speed parallel SRAM product line, designed specifically for deterministic, low-latency memory interfacing in real-time control and instrumentation systems where refresh-free operation and industrial reliability are mandatory.
FAQ
What is the maximum clock frequency supported by IDT71256SA12YGI8?
IDT71256SA12YGI8 is an asynchronous static RAM and does not use a clock signal. Its timing is governed by access parameters such as tRC (12 ns read cycle time) and tWC (12 ns write cycle time), enabling reliable operation with bus controllers running up to 83 MHz (1/12 ns) when timing margins are observed. No internal clock circuitry exists in the IDT71256SA12YGI8.
Does IDT71256SA12YGI8 require refresh circuitry?
No, IDT71256SA12YGI8 is a fully static RAM and requires no refresh cycles or external refresh controllers. Its CMOS latch-based memory cells retain data indefinitely as long as power is applied and CS remains asserted, making it ideal for systems where deterministic timing and zero-refresh overhead are essential - a core architectural feature of the IDT71256SA12YGI8.
What is the meaning of "YGI8" in IDT71256SA12YGI8?
In IDT71256SA12YGI8, "YG" denotes 28-pin 300-mil Plastic SOJ package (PJG28), "I" indicates Industrial temperature grade (–40°C to +85°C), and "8" specifies tape-and-reel packaging format. This full suffix confirms the IDT71256SA12YGI8 is supplied in moisture-sensitive, machine-ready reels compliant with J-STD-020C.
Can IDT71256SA12YGI8 be used with 3.3V microcontrollers?
IDT71256SA12YGI8 operates strictly at 5V (4.5–5.5V) and has TTL-compatible I/O thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V). Direct interface with 3.3V-only microcontrollers is not recommended without level translation, as its VIL max (0.8V) may not reliably recognize 3.3V logic LOWs. The IDT71256SA12YGI8 is intended for 5V system integration.
Is IDT71256SA12YGI8 RoHS-compliant and lead-free?
Yes, IDT71256SA12YGI8 is a green part: it is RoHS-compliant (Directive 2011/65/EU), lead-free, and halogen-free, as confirmed in the Renesas ordering information and datasheet revision history dated June 29, 2020. The "G" in the package code explicitly denotes green material content for the IDT71256SA12YGI8.
IDT71256SA12YGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-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:
- 256Kbit
- Memory Organization:
- 32K 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
IDT71256SA12YGI8 FAQ
1.How can I place an order for IDT71256SA12YGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71256SA12YGI8 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 IDT71256SA12YGI8 reliable?
The price and inventory of IDT71256SA12YGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71256SA12YGI8 is usually 5 days.
3.What payment methods are accepted for IDT71256SA12YGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71256SA12YGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71256SA12YGI8?
IDT71256SA12YGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71256SA12YGI8 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 IDT71256SA12YGI8?
For technical support, including IDT71256SA12YGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71256SA12YGI8 requirements.
6.How does Aetrix verify that IDT71256SA12YGI8 is sourced from the original manufacturer or authorized distributors?
All IDT71256SA12YGI8 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 IDT71256SA12YGI8 meets industry standards.
7.What is the process for return or replacement of IDT71256SA12YGI8?
All IDT71256SA12YGI8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT71256SA12YGI8, 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 IDT71256SA12YGI8 part is unused and in its original packaging.
Return procedure for IDT71256SA12YGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71256SA12YGI8 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
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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
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Microchip Technology
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AT24C08C-STUM-T
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