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Renesas UPD44645184AF5-E40-FQ1
- Part No.:
- UPD44645184AF5-E40-FQ1
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
UPD44645184AF5-E40-FQ1.pdf
- Description:
- 72-MBIT QDR II SRAM (4M X 18 BIT
- Quantity:
- Payment:
- Shipping:
Inventory:4,354
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Product details
Overview
UPD44645184AF5-E40-FQ1 from Renesas Electronics is a 4,194,304-word × 18-bit synchronous Quad Data Rate II (QDR II) SRAM with HSTL interface, 4.0 ns clock cycle time (250 MHz), 1.8 V core supply, and 165-pin plastic BGA (15 × 17 mm) packaging. It supports concurrent read/write operations, burst-4 DDR transfers, and DLL/PLL-based output timing control for high-speed networking and packet buffering applications.
For engineers reviewing the UPD44645184AF5-E40-FQ1 datasheet, UPD44645184AF5-E40-FQ1 pinout, UPD44645184AF5-E40-FQ1 application, or UPD44645184AF5-E40-FQ1 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in telecom infrastructure, and two validated alternative parts with documented functional and packaging differences.
Technical Context
The UPD44645184AF5-E40-FQ1 implements a dual-port synchronous architecture with independent read and write data paths, enabling simultaneous access without arbitration delay. Its input clock pair (K/K#) registers address and control on rising edges, while output clocks (C/C#) or echo clocks (CQ/CQ#) precisely align data valid windows to receiving logic.
Burst-4 operation reduces address bus frequency by 4× versus single-word access, and the integrated DLL/PLL ensures stable output timing across process/voltage/temperature variations. Byte write enable signals BW0# and BW1# allow selective 9-bit sub-word writes within the 18-bit data width, supporting efficient memory updates in packet processing pipelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4,194,304 words × 18 bits - provides 72 Mbit density optimized for 16–18 bit datapath systems like network switch ASICs. |
| Clock Cycle Time | 4.0 ns - enables 250 MHz DDR operation with guaranteed timing margins per Renesas AC specs. |
| Core Supply Voltage | 1.8 V ± 0.1 V - requires tight regulation; VDD must be applied before VDDQ during power-up to prevent latch-up. |
| I/O Interface | HSTL Class I - compatible with FPGA/ASIC HSTL receivers; VREF = VDDQ/2 reference required for signal integrity. |
| Package | 165-pin plastic BGA (15 × 17 mm) - matches JEDEC MO-245 standard; 0.8 mm ball pitch supports high-density routing. |
| Output Impedance Control | User-programmable 35–70 Ω via ZQ pin - enables dynamic impedance matching to PCB trace characteristics without external termination. |
| JTAG Support | IEEE 1149.1 compliant - allows boundary-scan testing of interconnects and embedded system debug via TDI/TDO/TCK/TMS pins. |
Pinout & Package
UPD44645184AF5-E40-FQ1 uses a 165-pin plastic BGA (15 × 17 mm, 0.8 mm pitch) per JEDEC MO-245. Pin functions are defined for the 4M × 18 configuration; expansion address pins (2A, 7A) support 144 Mb/288 Mb density upgrades.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| K, K# | Input clock pair | Registers all address/control inputs on rising edge of K; K# must be 180° out-of-phase for jitter-free sampling. |
| C, C# | Output clock pair | Controls output data timing: C# rising edge clocks Q0–Q8/Q10–Q17; C rising edge clocks Q9/Q18–Q17; tied HIGH to use K/K# instead. |
| R#, W# | Read/Write command inputs | Active-low synchronous commands; mutually exclusive-consecutive R#/W# asserts on same K edge are ignored. |
| BW0#, BW1# | Byte write select inputs | Enable 9-bit sub-word writes: BW0#=0/BW1#=0 → full 18-bit write; BW0#=0/BW1#=1 → D0–D8 only; etc. |
| ZQ | Impedance calibration input | Connects to external resistor to ground to set Q/CQ/CQ# output impedance to 0.2 × RQ; cannot be left floating or tied to VSS. |
| VREF | HSTL reference voltage | Nominally VDDQ/2; must be stable within ±20 mV to ensure correct HSTL input threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Concurrent Read/Write Ports | Enables full-duplex memory access-critical for real-time packet buffering where ingress traffic writes while egress reads. |
| 4-Tick Burst Operation | Reduces address bus toggling by 75% versus single-word access, lowering EMI and simplifying controller address generation logic. |
| DLL/PLL Timing Engine | Extends data valid window across PVT variations; locks within 20 μs of stable clock-enables reliable 250 MHz DDR signaling. |
| User-Programmable Output Impedance | 35–70 Ω range via ZQ pin eliminates need for discrete series termination resistors, saving board space and cost. |
| Clock-Stop Capability | Enters low-power state when K/K# halted; resumes normal operation within 20 μs-supports dynamic power gating in bursty traffic scenarios. |
Applications
| High-Speed Network Switch Buffering | Telecom Line Card Packet Memory |
|---|---|
|
Use Scenario: Storing and forwarding variable-length Ethernet/IP packets in multi-gigabit switching fabric ASICs. IC Role / Device Role / Timing Role: Dual-port QDR II SRAM acting as shared buffer between ingress parser and egress scheduler, synchronized to 250 MHz system clock. Use Value: 4.0 ns cycle time and burst-4 operation deliver 1.8 Gbps sustained bandwidth per port-matching 10Gbps line rates with margin. |
Use Scenario: Temporary storage of ATM cells or MPLS labels in carrier-grade optical transport equipment. IC Role / Device Role / Timing Role: High-reliability packet memory interfacing with TI C64x+ DSPs or Xilinx Virtex FPGAs via HSTL buses. Use Value: HSTL compatibility and programmable output impedance ensure clean signal integrity over 10+ inch PCB traces at 250 MHz. |
| Baseband Processing in Wireless Infrastructure | Real-Time Video Frame Buffering |
|
Use Scenario: Holding intermediate FFT/IFFT results and channel estimation data in LTE/5G massive MIMO baseband units. IC Role / Device Role / Timing Role: Low-latency, deterministic-access memory co-located with FPGA-based digital front-end processors. Use Value: Concurrent read/write ports eliminate memory contention stalls-reducing processing latency below 50 ns critical for TDD frame timing. |
Use Scenario: Frame storage for HD/4K video scalers and chroma key compositors in broadcast production gear. IC Role / Device Role / Timing Role: Synchronous dual-port buffer enabling simultaneous write from sensor pipeline and read to display engine. Use Value: Clock-stop capability allows power gating during blanking intervals-cutting dynamic power by >40% without interrupting video flow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar QDR II SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C2663KV18-400BZXC | 4M × 18, 400 MHz (2.5 ns), 1.8 V core, 165-pin BGA-but uses SSTL-2 I/O, not HSTL. | Requires SSTL-2 receiver compatibility; higher speed but stricter layout rules for stub-free routing. | Select when system already uses SSTL-2 interfaces and needs >250 MHz bandwidth; verify VREF and termination match. |
| AS7C34098B-25JCN | 4M × 18, 250 MHz (4.0 ns), 1.8 V core, but asynchronous SRAM-not QDR II-no burst or DLL. | Lacks DDR timing, concurrent ports, and echo clocks; requires external address sequencing logic. | Choose only for legacy designs lacking QDR controller IP; expect 30–50% lower effective bandwidth and higher controller complexity. |
Compared with CY7C2663KV18-400BZXC and AS7C34098B-25JCN, UPD44645184AF5-E40-FQ1 uniquely delivers HSTL compatibility, DLL-assisted timing margin at 250 MHz, and true concurrent dual-port operation-making it optimal for new telecom and networking designs requiring robust, low-jitter memory interfacing.
Availability
UPD44645184AF5-E40-FQ1 is available at Aetrix Electronics and suitable for high-speed networking equipment, telecom line cards, and wireless baseband processing systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for UPD44645184AF5-E40-FQ1 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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and communications markets.
The UPD44645184AF5-E40-FQ1 belongs to Renesas' QDR II SRAM product line, engineered specifically for high-bandwidth, low-latency packet buffering in next-generation networking infrastructure where deterministic timing and signal integrity are non-negotiable.
FAQ
What is the maximum operating frequency supported by UPD44645184AF5-E40-FQ1?
The UPD44645184AF5-E40-FQ1 is rated for 250 MHz operation with a 4.0 ns clock cycle time. This is confirmed in the Renesas datasheet M19959EJ2V0DS under "Recommended AC Operating Conditions." The device achieves this using its internal DLL/PLL circuitry to stabilize output timing, and operation above 250 MHz is not guaranteed or characterized.
Does UPD44645184AF5-E40-FQ1 support true concurrent read and write operations?
Yes, UPD44645184AF5-E40-FQ1 features physically separate read and write data ports, allowing simultaneous read and write transactions without arbitration delay. As stated in the datasheet's "Features" section and Block Diagram, this architecture enables full-duplex memory access-essential for real-time packet buffering applications.
What is the purpose of the ZQ pin on UPD44645184AF5-E40-FQ1?
The ZQ pin on UPD44645184AF5-E40-FQ1 is used for output impedance calibration. When connected to an external resistor to ground, it sets the drive strength of Q, CQ, and CQ# outputs to 0.2 × RQ. The datasheet specifies that ZQ must never be left unconnected or tied to VSS, and impedance recalibration occurs every 20 μs after power-up.
Can UPD44645184AF5-E40-FQ1 operate with only the K/K# clocks, without using C/C#?
Yes, UPD44645184AF5-E40-FQ1 can operate using only K/K# for output timing: tie C and C# HIGH to force data outputs to be synchronized to K/K# rising edges. The datasheet explicitly states this mode is supported, though C/C# are recommended for tighter flight-time matching in high-speed systems.
Is UPD44645184AF5-E40-FQ1 lead-free and RoHS compliant?
Yes, UPD44645184AF5-E40-FQ1 is lead-free and RoHS compliant, as indicated in the "Ordering Information" table of the Renesas datasheet M19959EJ2V0DS, which lists "Lead-free" under the Package column for all variants including UPD44645184AF5-E40-FQ1-A.
UPD44645184AF5-E40-FQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- -
- Memory Format:
- -
- Technology:
- -
- Memory Size:
- -
- Memory Organization:
- -
- Memory Interface:
- -
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
UPD44645184AF5-E40-FQ1 FAQ
1.How can I place an order for UPD44645184AF5-E40-FQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD44645184AF5-E40-FQ1 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 UPD44645184AF5-E40-FQ1 reliable?
The price and inventory of UPD44645184AF5-E40-FQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD44645184AF5-E40-FQ1 is usually 5 days.
3.What payment methods are accepted for UPD44645184AF5-E40-FQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD44645184AF5-E40-FQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD44645184AF5-E40-FQ1?
UPD44645184AF5-E40-FQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD44645184AF5-E40-FQ1 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 UPD44645184AF5-E40-FQ1?
For technical support, including UPD44645184AF5-E40-FQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD44645184AF5-E40-FQ1 requirements.
6.How does Aetrix verify that UPD44645184AF5-E40-FQ1 is sourced from the original manufacturer or authorized distributors?
All UPD44645184AF5-E40-FQ1 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 UPD44645184AF5-E40-FQ1 meets industry standards.
7.What is the process for return or replacement of UPD44645184AF5-E40-FQ1?
All UPD44645184AF5-E40-FQ1 units undergo pre-shipment inspection (PSI). If there is an issue with UPD44645184AF5-E40-FQ1, 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 UPD44645184AF5-E40-FQ1 part is unused and in its original packaging.
Return procedure for UPD44645184AF5-E40-FQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UPD44645184AF5-E40-FQ1 Tags
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