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Renesas 71V3577S85PFGI8
- Part No.:
- 71V3577S85PFGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
71V3577S85PFGI8.pdf
- Description:
- IC SRAM 4.5MBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,712
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Product details
Overview
71V3577S85PFGI8 from Renesas Electronics is a 128K × 36-bit (4.608 Mb) synchronous SRAM with 3.3V core and I/O supply, flow-through output architecture, and burst counter support. It operates at up to 87 MHz (8.5 ns access), supports linear/interleaved burst modes via LBO input, and features single-cycle deselect and global/byte write control. It is used in high-speed cache buffers and network packet memory subsystems requiring deterministic timing.
For engineers reviewing the 71V3577S85PFGI8 datasheet, 71V3577S85PFGI8 pinout, 71V3577S85PFGI8 application, or 71V3577S85PFGI8 equivalent, key selection criteria include its TQFP-100 package, industrial temperature range (–40°C to +85°C), 8.5 ns tCD timing, flow-through read path, and dual memory configuration (128K × 36 / 256K × 18).
Technical Context
This SRAM implements a synchronous, clock-driven interface with registered address/data inputs and unregistered (flow-through) outputs - eliminating output register latency. Its internal burst counter generates four sequential addresses per ADV assertion, with ordering determined by the static LBO pin state (linear or interleaved).
Write operations are fully self-timed using GW (global write), BWE (byte write enable), and BW1–BW4 (individual byte selects), allowing flexible 9-bit byte writes across the 36-bit data bus. Power management includes asynchronous ZZ sleep mode (IZZ ≤ 35 µA) and synchronous standby states (ISB1 ≤ 35 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128K × 36-bit (4.608 Mb); also configurable as 256K × 18-bit via pin strapping |
| Access Time (tCD) | 8.5 ns maximum - defines clock-to-data delay for flow-through reads at 87 MHz operation |
| Operating Voltage | 3.3 V ±5% for both core (VDD) and I/O (VDDQ) - enables direct interfacing with 3.3V logic without level shifters |
| Temperature Range | –40°C to +85°C (industrial grade) - validated for embedded networking and industrial control environments |
| Burst Mode | Four-word burst with programmable order (LBO pin) - reduces address bus traffic and improves sustained bandwidth |
| Power-Down Current | ≤35 µA in full sleep mode (ZZ HIGH) - critical for low-power system standby states |
| Package | JEDEC-standard 100-pin TQFP (14 mm × 20 mm) - surface-mount compatible with standard reflow profiles |
Pinout & Package
71V3577S85PFGI8 is packaged in a 100-pin thin quad flatpack (TQFP), JEDEC MO-145AC, 14 mm × 20 mm body, 0.5 mm pitch. Pin 1 marked with dot; top-side marking includes "71V3577S85PFGI8" and date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | Synchronous address latching on rising CLK edge gated by ADSP/ADSC; A0–A16 used for 128K×36, A0–A17 for 256K×18 |
| CLK | System Clock Input | Primary timing reference; all synchronous inputs sampled on rising edge; no internal clock division |
| I/O0–I/O31, I/OP1–I/OP4 | Data I/O (36-bit bus) | Flow-through outputs - data appears at pins after tCD delay; inputs registered on CLK rise |
| GW, BWE, BW1–BW4 | Write Control Inputs | GW enables full 36-bit write; BWE gates BWx; BW1–BW4 each control one 9-bit byte (BW3/BW4 unused in 256K×18 mode) |
| LBO | Burst Order Select | Asynchronous static input: LOW = linear burst (00→01→10→11), HIGH = interleaved burst (00→01→11→10) |
| ZZ | Asynchronous Sleep Enable | HIGH disables internal clock and reduces current to ≤35 µA; retains data; no setup time required |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through output architecture | Eliminates output register delay - tCD = 8.5 ns directly maps to system-level read latency |
| Single-cycle deselect | Chip deactivation completes within one clock cycle - enables rapid context switching in multi-SRAM systems |
| Configurable burst addressing | LBO pin selects linear or interleaved sequence - matches CPU cache line layouts or DSP access patterns |
| Byte-selectable write capability | Four independent 9-bit write enables (BW1–BW4) - allows partial writes without read-modify-write overhead |
| Industrial-grade reliability | Specified and tested over –40°C to +85°C with 3.3V ±5% supplies - suitable for uncontrolled ambient deployments |
Applications
| Network Packet Buffering | Real-Time Signal Processing |
|---|---|
|
Use Scenario: Storing incoming Ethernet frames in a switch ASIC before classification and forwarding. IC Role / Device Role / Timing Role: High-bandwidth, low-latency buffer with deterministic 8.5 ns read access and burst capability for frame header inspection. Use Value: Enables line-rate processing of 10 GbE traffic by sustaining >3.5 GB/s read throughput with zero-output-register jitter. |
Use Scenario: Holding intermediate FFT coefficients in a radar digital beamformer FPGA subsystem. IC Role / Device Role / Timing Role: Synchronous memory co-processor providing burst-aligned coefficient storage for pipelined MAC units. Use Value: Linear burst mode matches natural FFT stage addressing; flow-through output avoids pipeline stalls during coefficient fetch. |
| Industrial PLC Data Logging | Avionics Display Frame Memory |
|
Use Scenario: Capturing sensor timestamps and analog values in a ruggedized programmable logic controller. IC Role / Device Role / Timing Role: Nonvolatile-buffered SRAM interfaced to ARM Cortex-M7 via parallel bus; survives brownouts via ZZ sleep mode. Use Value: 35 µA sleep current extends backup battery life; industrial temp rating ensures operation inside sealed enclosures. |
Use Scenario: Serving as dual-port frame buffer for an ARINC 661-compliant cockpit display generator. IC Role / Device Role / Timing Role: Primary pixel memory accessed by graphics engine at 87 MHz with strict tCD timing for video sync stability. Use Value: Fixed 8.5 ns access guarantees pixel clock alignment; TQFP package meets DO-160 vibration and thermal cycling requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1371DV33-8BGXI | 128K × 32-bit, 8 ns access, 119-ball BGA only - no TQFP option; lacks LBO-configurable burst order | Requires PCB redesign for BGA; burst sequence fixed to interleaved - limits compatibility with linear-addressing processors | Select when BGA footprint is preferred and burst order flexibility is unnecessary |
| AS7C3256A-8TIN | 32K × 32-bit, 8 ns, TQFP-100 - smaller density, no burst counter or ADV/LBO controls; simpler control logic | Insufficient capacity for multi-channel buffering; cannot replace 71V3577S85PFGI8 in burst-intensive designs | Choose only for cost-sensitive, low-bandwidth applications where burst mode is unused |
Compared with CY7C1371DV33-8BGXI and AS7C3256A-8TIN, the 71V3577S85PFGI8 uniquely delivers 128K × 36 density in TQFP with programmable burst order and flow-through timing - making it irreplaceable in space-constrained, high-throughput industrial and aerospace buffer designs.
Availability
71V3577S85PFGI8 is available at Aetrix Electronics and suitable for network packet buffering, real-time signal processing, and industrial PLC data logging requiring stable component supply across extended product lifecycles.
Supply support for 71V3577S85PFGI8 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.
The 71V3577S family targets high-performance embedded systems needing deterministic, low-latency memory - designed specifically for cache buffers, packet engines, and real-time DSP subsystems operating under industrial environmental constraints.
FAQ
What is the maximum operating frequency of the 71V3577S85PFGI8?
The 71V3577S85PFGI8 supports up to 87 MHz operation, corresponding to its 8.5 ns clock-to-data (tCD) access time specification. This frequency is guaranteed across the full industrial temperature range (–40°C to +85°C) and 3.3V ±5% supply conditions. The device does not support higher frequencies - attempting 100 MHz would violate timing margins per the AC Electrical Characteristics table.
Does the 71V3577S85PFGI8 support both 128K × 36 and 256K × 18 configurations simultaneously?
No - the 71V3577S85PFGI8 is hardwired at manufacture for one configuration. The 71V3577S variant (including 71V3577S85PFGI8) is specified for 128K × 36 organization, using address pins A0–A16. The 256K × 18 mode applies only to the 71V3579S family members, which have different pinouts and internal decoding - confirmed by the distinct PKG100 pin diagrams for each part number.
How does the LBO pin affect burst behavior in the 71V3577S85PFGI8?
In the 71V3577S85PFGI8, the LBO pin statically selects burst order: LOW configures linear sequence (00→01→10→11), HIGH selects interleaved (00→01→11→10). This setting must remain stable during operation - changing LBO mid-burst causes undefined address sequencing. The choice directly impacts compatibility with processor cache line layouts and must match system-level memory controller expectations.
Can the 71V3577S85PFGI8 be used in a system with mixed 3.3V and 5V logic?
No - the 71V3577S85PFGI8 requires strictly 3.3V ±5% for both VDD (core) and VDDQ (I/O). Its absolute maximum input voltage is VDDQ + 0.5V (≤3.8V), and VIH(min) is 2.0V. Direct connection to 5V logic violates voltage ratings and risks permanent damage. Level translation (e.g., TXB0108) is mandatory for interfacing with 5V buses.
What is the purpose of the ADV pin in the 71V3577S85PFGI8?
The ADV (Burst Address Advance) pin in the 71V3577S85PFGI8 controls burst progression: LOW enables automatic increment of the internal burst counter for subsequent words; HIGH suspends advancement, holding the current address for repeated access. This allows dynamic burst interruption - e.g., pausing packet header reads to service priority interrupts - without terminating the burst cycle.
71V3577S85PFGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Synchronous, SDR
- Memory Size:
- 4.5Mbit
- Memory Organization:
- 128K x 36
- Memory Interface:
- Parallel
- Clock Frequency:
- 87 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 8.5 ns
- Voltage - Supply:
- 3.135V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
71V3577S85PFGI8 FAQ
1.How can I place an order for 71V3577S85PFGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71V3577S85PFGI8 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 71V3577S85PFGI8 reliable?
The price and inventory of 71V3577S85PFGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V3577S85PFGI8 is usually 5 days.
3.What payment methods are accepted for 71V3577S85PFGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V3577S85PFGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71V3577S85PFGI8?
71V3577S85PFGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71V3577S85PFGI8 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 71V3577S85PFGI8?
For technical support, including 71V3577S85PFGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V3577S85PFGI8 requirements.
6.How does Aetrix verify that 71V3577S85PFGI8 is sourced from the original manufacturer or authorized distributors?
All 71V3577S85PFGI8 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 71V3577S85PFGI8 meets industry standards.
7.What is the process for return or replacement of 71V3577S85PFGI8?
All 71V3577S85PFGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 71V3577S85PFGI8, 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 71V3577S85PFGI8 part is unused and in its original packaging.
Return procedure for 71V3577S85PFGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71V3577S85PFGI8 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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