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Renesas 71024S25TYG
- Part No.:
- 71024S25TYG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
71024S25TYG.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,436
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Product details
Overview
71024S25TYG 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 temperature range (–40°C to +85°C). It features dual chip selects (CS1/CS2), output enable (OE), and bidirectional data lines - used in real-time control buffers, legacy industrial PLC memory expansion, and embedded instrumentation data logging.
For engineers reviewing the 71024S25TYG datasheet, 71024S25TYG pinout, 71024S25TYG application, or 71024S25TYG equivalent, key selection criteria include access time vs. power trade-offs, SOJ-32 package compatibility, industrial-grade reliability under thermal cycling, and direct replacement feasibility for legacy IDT71024-based designs.
Technical Context
The 71024S25TYG implements fully static asynchronous architecture - no clocks or refresh required - with independent CS1/CS2 gating enabling hierarchical memory mapping in multi-bank systems. Its OE-controlled 6 ns output enable latency supports tightly timed read bursts in microcontroller co-processor interfaces.
Operation relies on TTL-compatible voltage thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and dual standby modes: ISB (TTL-level deselect, 40 mA) and ISB1 (CMOS-level full standby, 10 mA), allowing dynamic power scaling based on bus arbitration state.
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 - determines minimum CPU wait-state insertion for 80C188/80C186-based controllers |
| Supply Voltage | 5.0 V ± 10% (4.5–5.5 V) - compatible with legacy 5 V logic rails without level translation |
| Operating Temperature | –40°C to +85°C - qualified for uncooled industrial enclosures and transportation electronics |
| Standby Current (ISB1) | 10 mA max at VCC = 5.5 V - enables low-power sleep mode in battery-backed data loggers |
| I/O Capacitance | CI/O ≤ 8 pF - ensures signal integrity on 10 cm PCB traces at >33 MHz bus toggle rates |
| Output Enable Delay (tOE) | 6 ns max - supports sub-20 ns read cycles in FPGA-based memory controllers |
Pinout & Package
71024S25TYG is housed in a 32-pin 300-mil Plastic SOJ (PJG32) package with gull-wing leads, designed for wave-solder compatibility and board-level thermal dissipation in dense industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (A0 LSB to A16 MSB) - supports full 128K decoding without external demux |
| I/O0–I/O7 | Bidirectional Data Lines | 8-bit TTL-compatible data bus - shares pins for read/write; requires external direction control via WE/OE timing |
| CS1, CS2 | Chip Select Inputs | Active-low dual select - enables banked memory decoding (e.g., CS1 for lower 64K, CS2 for upper 64K) |
| OE | Output Enable | Active-low - gates output drivers only; does not affect internal memory state or write path |
| WE | Write Enable | Active-low - controls write latch timing; must overlap active CS1/CS2 to initiate write cycle |
| VCC, GND | Power Supply | Single 5 V supply with dedicated ground pin - decoupling required within 1 cm of VCC pin per JEDEC SOJ guidelines |
Key Features
| Feature | Design Value |
|---|---|
| 12 ns Address Access (tAA) | Enables zero-wait-state operation with 83 MHz 80C188EC and similar embedded CPUs |
| Dual Chip Select Architecture | Supports seamless memory banking in 16-bit systems without external address decoder logic |
| 6 ns Output Enable Latency (tOE) | Reduces read turnaround time in burst-mode DMA transfers between FPGA and microcontroller |
| CMOS-Level Full Standby (ISB1) | Draws only 10 mA during extended idle periods - critical for fanless industrial gateways |
| TTL-Compatible I/O | Eliminates level-shifter components when interfacing with legacy 5 V microcontrollers and CPLDs |
Applications
| Industrial PLC Data Buffer | Legacy Medical Instrument Memory |
|---|---|
Use Scenario: Real-time acquisition of analog sensor streams in DIN-rail mounted PLCs with deterministic scan cycles. IC Role / Device Role / Timing Role: High-reliability scratchpad memory holding process variable snapshots between scan intervals. Use Value: 12 ns tAA ensures sub-1 µs data capture latency; industrial temp rating guarantees uptime in unconditioned control cabinets. | Use Scenario: ECG waveform buffering in FDA-cleared portable diagnostic devices requiring long-term calibration stability. IC Role / Device Role / Timing Role: Non-refreshing storage for digitized lead-II signals prior to FFT processing. Use Value: Fully static operation prevents data corruption during power brownouts; ISB1 <10 mA extends battery life in handheld units. |
| Avionics Maintenance Terminal RAM | Test Equipment Pattern Memory |
Use Scenario: Onboard diagnostics in commercial aircraft line-replaceable units (LRUs) operating across –55°C to +85°C ambient extremes. IC Role / Device Role / Timing Role: Configuration and fault-log storage accessible by ARINC-429 host processors. Use Value: Qualified industrial temp range meets DO-160 Section 22 Category D vibration/thermal shock requirements. | Use Scenario: High-speed digital pattern generation in automated test equipment (ATE) for ASIC validation. IC Role / Device Role / Timing Role: Vector storage for 100+ MHz stimulus sequences synchronized to system clock. Use Value: 32-pin SOJ footprint matches legacy ATE socket tooling; tRC = 12 ns sustains 83 MHz pattern rate. |
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 |
|---|---|---|---|
| CY62128ELL-45ZSXIT | 45 ns access time; 3.3 V supply; TSOP-32 package | Requires level shifters and redesign for 5 V systems; lower power but slower timing | Select only if migrating to 3.3 V architecture and relaxing timing constraints |
| AS6C1008-12PIN | 12 ns access; 5 V supply; PDIP-32 package | Through-hole mounting; higher thermal resistance; no industrial temp grade available | Use for prototyping or low-volume repair where SOJ rework is impractical |
Compared with CY62128ELL-45ZSXIT and AS6C1008-12PIN, the 71024S25TYG uniquely delivers 12 ns performance at 5 V in an industrial-rated SOJ-32 package - preserving legacy board layouts while meeting thermal and timing demands of deployed industrial hardware.
Availability
71024S25TYG is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy medical instrument memory expansion, and avionics maintenance terminal RAM requiring stable component supply across extended product lifecycles.
Supply support for 71024S25TYG 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 enterprise applications.
The IDT71024 family - now part of Renesas' legacy memory portfolio - was engineered specifically for drop-in replacement of aging bipolar SRAMs in 5 V industrial control systems, emphasizing pin compatibility, industrial temperature resilience, and zero-refresh reliability.
FAQ
What is the maximum operating frequency supported by the 71024S25TYG?
The 71024S25TYG does not operate on a clock; it is an asynchronous SRAM. Its maximum effective bus frequency is determined by its read cycle time (tRC = 12 ns), supporting up to ~83 MHz sustained random-access throughput when interfaced with properly timed control logic. The 71024S25TYG achieves this without internal clocks or refresh circuitry.
Does the 71024S25TYG require external refresh circuitry?
No, the 71024S25TYG is a fully static CMOS SRAM and requires no refresh cycles or external refresh circuitry. Data retention is indefinite as long as VCC remains within specification and the device stays within its rated temperature range. This makes the 71024S25TYG ideal for safety-critical and low-power hold applications where refresh-induced latency or failure is unacceptable.
What is the function of the dual chip select pins (CS1 and CS2) on the 71024S25TYG?
CS1 and CS2 on the 71024S25TYG provide hierarchical chip enable control: CS1 must be low and CS2 high for normal operation. Either signal asserted inactive places the device in standby (ISB or ISB1). This dual-select scheme allows memory banking - for example, using CS1 to select lower 64K and CS2 to select upper 64K - without external decoding logic. The 71024S25TYG uses this to simplify address space partitioning in 16-bit systems.
Can the 71024S25TYG be used with modern 3.3 V microcontrollers?
The 71024S25TYG is strictly a 5 V device (VCC = 4.5–5.5 V) with TTL-compatible I/O thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V). Direct connection to 3.3 V microcontrollers risks violating input high-voltage limits and may cause excessive current leakage. Interfacing requires level translation - e.g., TXB0108 or discrete MOSFET translators - making the 71024S25TYG best suited for legacy 5 V designs rather than new 3.3 V platforms.
Is the 71025S25TYG a valid alternative to the 71024S25TYG?
No - the 71025S25TYG is not a documented or manufacturable part number. Renesas' official ordering matrix lists only 71024S12/15/20 variants (e.g., 71024S12TYG, 71024S20TYGI). The "71025" prefix does not correspond to any known IDT/Renesas SRAM family. Engineers should verify all part numbers against Renesas' published datasheet DS2964 and avoid unlisted suffixes or digit substitutions when sourcing the 71024S25TYG.
71024S25TYG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-BSOJ (0.300", 7.62mm 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:
- 25ns
- Access Time:
- 25 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
71024S25TYG FAQ
1.How can I place an order for 71024S25TYG through Aetrix?
Please submit a Request for Quotation (RFQ) for 71024S25TYG 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 71024S25TYG reliable?
The price and inventory of 71024S25TYG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71024S25TYG is usually 5 days.
3.What payment methods are accepted for 71024S25TYG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71024S25TYG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71024S25TYG?
71024S25TYG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71024S25TYG 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 71024S25TYG?
For technical support, including 71024S25TYG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71024S25TYG requirements.
6.How does Aetrix verify that 71024S25TYG is sourced from the original manufacturer or authorized distributors?
All 71024S25TYG 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 71024S25TYG meets industry standards.
7.What is the process for return or replacement of 71024S25TYG?
All 71024S25TYG units undergo pre-shipment inspection (PSI). If there is an issue with 71024S25TYG, 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 71024S25TYG part is unused and in its original packaging.
Return procedure for 71024S25TYG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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