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Renesas 71V424L15PHG
- Part No.:
- 71V424L15PHG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
71V424L15PHG.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 44TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:1,843
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Product details
Overview
71V424L15PHG from Renesas Electronics is a 4-Mbit (512K × 8) low-power, high-speed CMOS static RAM operating from a single 3.3V supply, with 15ns read/write cycle time, industrial temperature range (–40°C to +85°C), and JEDEC-compliant center power/ground pinout for noise reduction. It serves as main or buffer memory in real-time embedded controllers requiring deterministic access without refresh.
For engineers reviewing the 71V424L15PHG datasheet, 71V424L15PHG pinout, 71V424L15PHG application, or 71V424L15PHG equivalent, key selection criteria include its TSOP-44 package, 15ns timing at industrial temperature, low standby current (45mA dynamic ISB, 10mA static ISB1), and TTL-compatible bidirectional I/Os - all critical for legacy bus-interface designs and space-constrained industrial modules.
Technical Context
The 71V424L15PHG implements fully static asynchronous architecture with no clocks or refresh required. Its control logic supports independent chip select (CS), output enable (OE), and write enable (WE) inputs, enabling flexible read/write arbitration in shared-bus systems.
All address inputs (A0–A18), data I/Os (I/O0–I/O7), and control pins operate at TTL voltage levels (VIH = 2.0V min, VIL = 0.8V max) with 3.3V supply. The device guarantees tAA = 15ns, tRC = 15ns, and tOE = 7ns under industrial conditions, with output disable times (tOHZ, tCHZ) specified up to 7ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (512K × 8) - supports byte-wide data paths without external multiplexing |
| Access Time (tAA) | 15 ns max at –40°C to +85°C - ensures deterministic latency for real-time interrupt handling |
| Supply Voltage | 3.0V to 3.6V - compatible with standard 3.3V LDO rails and tolerant of ±10% variation |
| Standby Current (ISB1) | 10 mA max at VDD = 3.6V, f = 0 - enables ultra-low-power sleep modes in battery-backed systems |
| I/O Capacitance | 8 pF max (CI/O) - minimizes signal integrity degradation on high-speed parallel buses |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, motor drives, and outdoor telecom equipment |
| Package Type | 44-pin TSOP Type II (PHG44), 400 mil width - surface-mount compatible with standard reflow profiles |
Pinout & Package
44-pin, 400 mil TSOP Type II (PHG44) package with gull-wing leads, JEDEC-standard footprint, and center VDD/VSS arrangement for reduced switching noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word decoding; no internal latching |
| CS | Chip Select | Active-low enable; deassertion places outputs in high-Z and reduces ICC to ISB/ISB1 levels |
| OE | Output Enable | Active-low control for read-data gating; tOE = 7ns max ensures tight bus timing margins |
| WE | Write Enable | Active-low write strobe; controls data capture on I/O0–I/O7 during CS-active window |
| I/O0–I/O7 | Bidirectional Data | TTL-compatible I/Os with 8mA sink / 4mA source drive; no external bus transceivers needed |
| VDD | Power Supply | 3.3V core supply; center-placed pin (Pin 23) minimizes IR drop across array |
| VSS | Ground | Ground reference; center-placed pin (Pin 24) provides low-inductance return path |
| NC | No Connect | Pins 2, 3, 19, 20, 21, 22, 33, 34, 35, 36 - must remain unconnected per design |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center Power/Ground Pinout | Reduces simultaneous switching noise (SSN) by 30–40% vs. corner-supply layouts, improving signal integrity on dense PCBs |
| Low-Power "L" Variant | 10mA static ISB1 current enables >10-year battery backup in SRAM-based nonvolatile storage applications |
| Equal Access & Cycle Times | tAA = tRC = 15ns eliminates timing asymmetry in burst-read or FIFO-style access patterns |
| TTL-Compatible I/Os | Direct interface with legacy 5V-tolerant microcontrollers (e.g., Intel 80C188, Motorola 68332) using level-shifter-free designs |
| Industrial Temperature Qualification | Full AC/DC specs guaranteed over –40°C to +85°C - validated for use in DIN-rail PLCs and railway signaling hardware |
Applications
| Industrial PLC Memory Buffer | Legacy Bus-Based Data Acquisition |
|---|---|
Use Scenario: Storing real-time sensor samples and control setpoints in modular programmable logic controllers with ISA/PCI-104 expansion slots. IC Role / Device Role / Timing Role: Byte-wide static RAM acting as dual-port-accessible scratchpad memory, interfacing directly to 8-bit microcontroller data bus with no wait states. Use Value: 15ns access enables sub-microsecond response to emergency stop interrupts, meeting IEC 61508 SIL-2 timing constraints. |
Use Scenario: Capturing synchronized analog-to-digital conversion results in multi-channel environmental monitoring systems using parallel ADC interfaces. IC Role / Device Role / Timing Role: High-reliability buffer memory holding raw 16-bit sample streams before DMA transfer to host processor. Use Value: Low ISB1 current extends runtime of solar-powered remote stations; TSOP package fits compact 2-layer PCB layouts. |
| Telecom Line Card Frame Buffer | Motor Drive Control Register Bank |
Use Scenario: Temporary storage of packetized voice frames in TDM-over-IP gateway line cards operating in outdoor cabinets. IC Role / Device Role / Timing Role: Non-refreshing memory bank providing deterministic latency for jitter-sensitive voice buffering. Use Value: Industrial temp rating ensures stable operation at 70°C ambient; center VDD/VSS suppresses crosstalk between adjacent E1/T1 traces. |
Use Scenario: Holding configuration registers, PID coefficients, and fault logs in servo amplifier modules with isolated CAN/RS-485 communication. IC Role / Device Role / Timing Role: Fast-access parameter store mapped into microcontroller's external memory space for real-time tuning. Use Value: 3.3V-only operation simplifies power architecture; 8-bit width matches native register width of ARM Cortex-M3/M4 peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62157EV30LL-15ZXI | 512K × 8, 15ns, 3.3V, TSOP-44, but uses different pinout (VDD/VSS at corners) and higher ISB1 (25mA) | Lacks JEDEC center power/ground; requires PCB redesign for noise-sensitive applications | Choose only if existing layout accommodates corner-supply routing and higher standby power is acceptable |
| AS6C4008-15TIN | 512K × 8, 15ns, 3.3V, TSOP-44, but rated only for commercial temp (0°C to +70°C) and lacks industrial qualification | Not suitable for deployments exceeding 70°C ambient or requiring extended thermal cycling validation | Select only for cost-sensitive indoor consumer electronics where industrial reliability is not mandated |
Compared with CY62157EV30LL-15ZXI and AS6C4008-15TIN, the 71V424L15PHG uniquely combines industrial temperature support, JEDEC-compliant low-noise pinout, and ultra-low 10mA static standby current - making it the sole option for thermally demanding, safety-critical embedded memory where layout stability and battery life are co-constrained.
Availability
71V424L15PHG is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, motor drive controllers, and battery-backed data loggers requiring stable component supply across extended product lifecycles.
Supply support for 71V424L15PHG 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 71V424L15PHG belongs to Renesas' legacy high-reliability SRAM product line, designed specifically for industrial and telecom applications demanding deterministic timing, long-term availability, and robustness across wide temperature ranges.
FAQ
What is the maximum operating frequency supported by the 71V424L15PHG?
The 71V424L15PHG does not operate on a clock; it is an asynchronous SRAM. Its maximum effective throughput is determined by its 15ns read/write cycle time (tRC), enabling up to 66.7 MHz sustained random access on a properly terminated 8-bit bus. This timing is fully guaranteed over the industrial temperature range (–40°C to +85°C) with VDD = 3.0V to 3.6V.
Does the 71V424L15PHG require refresh circuitry or external clocks?
No, the 71V424L15PHG is a fully static RAM and requires no refresh cycles, clocks, or timing generators. Its internal latches retain data indefinitely as long as VDD is maintained within specification and CS remains asserted during active use. This eliminates complexity in microcontroller-based systems lacking dedicated DRAM controllers.
Can the 71V424L15PHG be used with 5V logic interfaces?
The 71V424L15PHG features TTL-compatible inputs (VIH = 2.0V min, VIL = 0.8V max) and outputs (VOH ≥ 2.4V, VOL ≤ 0.4V at 3.3V), allowing direct connection to 5V-tolerant microcontrollers (e.g., older 8051 or 68K families) without level shifters - provided input voltages do not exceed VDD + 0.5V (4.1V max) per absolute maximum ratings.
What is the meaning of "L" in the 71V424L15PHG part number?
The "L" in 71V424L15PHG denotes the low-power variant of the IDT71V424 family. Compared to the "S" (standard power) version, the "L" variant reduces dynamic standby current (ISB) by ~10–15mA and cuts static standby current (ISB1) to just 10mA - a critical advantage for battery-backed memory retention and energy-constrained edge devices.
Is the 71V424L15PHG pin-compatible with earlier IDT-branded versions?
Yes, the 71V424L15PHG maintains identical pinout, electrical characteristics, and timing specifications as the original IDT-branded 71V424L15PHG. Renesas acquired IDT's memory business and continues manufacturing this part with full form-fit-function compatibility, including identical PHG44 TSOP-44 mechanical dimensions and solder-reflow profiles.
71V424L15PHG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 44-TSOP (0.400", 10.16mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TSOP II
71V424L15PHG FAQ
1.How can I place an order for 71V424L15PHG through Aetrix?
Please submit a Request for Quotation (RFQ) for 71V424L15PHG 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 71V424L15PHG reliable?
The price and inventory of 71V424L15PHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V424L15PHG is usually 5 days.
3.What payment methods are accepted for 71V424L15PHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V424L15PHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71V424L15PHG?
71V424L15PHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71V424L15PHG 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 71V424L15PHG?
For technical support, including 71V424L15PHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V424L15PHG requirements.
6.How does Aetrix verify that 71V424L15PHG is sourced from the original manufacturer or authorized distributors?
All 71V424L15PHG 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 71V424L15PHG meets industry standards.
7.What is the process for return or replacement of 71V424L15PHG?
All 71V424L15PHG units undergo pre-shipment inspection (PSI). If there is an issue with 71V424L15PHG, 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 71V424L15PHG part is unused and in its original packaging.
Return procedure for 71V424L15PHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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