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Renesas UPD44647186AF5-E22-FQ1-A
- Part No.:
- UPD44647186AF5-E22-FQ1-A
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 165-LBGA
- Datasheet:
-
UPD44647186AF5-E22-FQ1-A.pdf
- Description:
- IC SRAM 72MBIT PARALLEL 165PBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,474
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Product details
Overview
UPD44647186AF5-E22-FQ1-A from Renesas Electronics is a 4,194,304-word × 18-bit synchronous Quad Data Rate II+ (QDR II+) SRAM with 2.5 clock cycles read latency, 1.8 V core supply, HSTL interface, and 165-pin plastic BGA (15 × 17) packaging. It delivers 450 MHz operation (2.2 ns clock cycle), supports concurrent read/write via separate data ports, and integrates DLL/PLL for precise timing in high-speed networking buffers.
For engineers reviewing the UPD44647186AF5-E22-FQ1-A datasheet, UPD44647186AF5-E22-FQ1-A pinout, UPD44647186AF5-E22-FQ1-A application, or UPD44647186AF5-E22-FQ1-A equivalent, key selection criteria include verified 2.5-cycle read latency, HSTL-compatible 1.8 V I/O, on-die termination (ODT) configurability, QVLD signal support, and 165-ball BGA mechanical compatibility with JEDEC MO-251.
Technical Context
This QDR II+ SRAM implements dual-edge DDR timing using K/K# input clocks and CQ/CQ# echo clocks to align output data validity. Its architecture features independent read/write data paths, a 4-word burst counter, and internally self-timed write control - enabling full bus utilization without turnaround cycles.
The device integrates user-programmable ODT (ON/OFF at power-on), ZQ-based output impedance tuning (35–70 Ω), and JTAG 1149.1 test access. DLL/PLL locking requires ≥190 MHz stable K-clock input; clock-stop mode resumes normal operation within 20 μs after resumption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 4,194,304 words × 18 bits (72 M-bit density) |
| Read Latency | Fixed 2.5 clock cycles - determines minimum time from R# assertion to first valid Q output |
| Max Clock Frequency | 450 MHz (2.2 ns cycle time) - sets maximum sustained data throughput |
| Supply Voltage | VDD = 1.8 ± 0.1 V - powers core logic; VDDQ = 1.5/1.8 V - isolates I/O buffer supply |
| Interface Standard | HSTL Class I - defines voltage thresholds, drive strength, and termination requirements |
| Package | 165-pin plastic BGA (15 mm × 17 mm, 1.0 mm pitch) - matches JEDEC MO-251 footprint |
| On-Die Termination | User-selectable ODT (ON/OFF at power-on) - eliminates external resistors on D/BW# lines |
| Data Valid Signal | QVLD output edge-aligned with CQ/CQ# - enables precise capture of burst data in FPGA/ASIC receivers |
Pinout & Package
UPD44647186AF5-E22-FQ1-A is housed in a 165-pin plastic BGA (15 × 17 mm, 1.0 mm pitch), compliant with JEDEC MO-251. Pin functions are defined per the 4M × 18 configuration shown in the datasheet Figure 5 (page 5).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Synchronous Address Input | 20-bit address registered on K rising edge; used for 4-word burst addressing |
| D0–D17 | Synchronous Data Input | 18-bit write data sampled on both K and K# rising edges during WRITE cycle |
| Q0–Q17 | Synchronous Data Output | 18-bit read data aligned to K/K# rising edges; valid indicated by QVLD |
| R#, W# | Command Input | Active-low READ/WRITE strobes - initiate burst transactions on next K edge |
| BW0#, BW1# | Byte Write Select | Two independent 9-bit byte masks - enable partial writes without read-modify-write |
| K, K# | Differential Input Clock | Single-ended pair (180° phase) - registers all inputs on K rising edge, data on both edges |
| CQ, CQ# | Echo Clock Output | Single-ended outputs tightly matched to Q outputs - used as data-valid timing reference |
| QVLD | Data Valid Indicator | Output asserted edge-aligned with CQ/CQ# - signals when Q0–Q17 contain valid data |
| ODT | On-Die Termination Control | High at power-on enables 150 Ω ODT on D/BW# pins; state fixed after initialization |
| ZQ | Impedance Calibration Input | Connect to resistor-to-ground (175–350 Ω) - sets output driver and ODT impedance |
Key Features
| Feature | Design Value |
|---|---|
| Concurrent Read/Write Ports | Independent D and Q buses allow simultaneous access - eliminates bus turnaround penalty in packet buffering |
| QVLD Timing Signal | Edge-aligned with CQ/CQ# - simplifies setup/hold timing closure in high-speed FPGA interfaces |
| User-Programmable ODT | ON/OFF selected at power-on via ODT pin - reduces PCB routing complexity and improves signal integrity |
| DLL/PLL Timing Engine | Locks to K-clock ≥190 MHz - ensures wide data-valid window across temperature/voltage for 450 MHz operation |
| Four-Tick Burst Operation | Transfers 4 words per command - halves effective address bus frequency vs. single-word access |
| IEEE 1149.1 JTAG Support | Full boundary-scan capability - enables production test and debug without intrusive probing |
Applications
| Packet Buffering in Switch ASICs | Line Card Memory in Telecom Routers |
|---|---|
Use Scenario: Storing ingress/egress packet headers and payloads in multi-gigabit Ethernet switching fabric. IC Role / Device Role / Timing Role: High-bandwidth, low-latency shared memory for header lookup and queue management. Use Value: 450 MHz operation and concurrent read/write enable >1.6 Gbps sustained throughput per port without arbitration stalls. |
Use Scenario: Buffering variable-length ATM or IP cells in OC-192/STM-64 line interface cards. IC Role / Device Role / Timing Role: Synchronous dual-port memory interfacing directly to SerDes PHYs and traffic managers. Use Value: QVLD + CQ alignment guarantees deterministic data capture at 450 MHz, reducing FPGA timing margin overhead. |
| Baseband Processing in Wireless BTS | Real-Time Video Frame Buffering |
Use Scenario: Temporary storage of OFDM symbol data between FFT processing stages in LTE eNodeB baseband units. IC Role / Device Role / Timing Role: Low-jitter, burst-access memory synchronized to system clock domain via K/K#. Use Value: 2.5-cycle fixed latency enables predictable pipeline scheduling; HSTL interface ensures noise immunity in dense RF environments. |
Use Scenario: Dual-frame buffering for 1080p60 video processing pipelines in broadcast encoders. IC Role / Device Role / Timing Role: High-density SRAM providing seamless frame swap with zero-latency read-after-write capability. Use Value: 72 M-bit capacity (4M×18) supports two full HD frames; ODT eliminates stub reflections on long parallel buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar QDR II+ SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C2665KV18-453BAXI | 4M × 18, 450 MHz, 2.5-cycle latency, same 165-pin BGA but Cypress-specific pinout and ODT implementation | Requires layout revision due to non-identical pin mapping (e.g., CQ/CQ# location differs); no ZQ calibration | Select only if existing design uses Cypress ecosystem and timing margins accommodate different echo clock skew. |
| AS7C32560A-15PCN | Asynchronous 256K × 18 SRAM, 15 ns access, 3.3 V, SOJ-54 - no QDR, no burst, no clocking | Cannot replace in high-speed synchronous systems; suitable only for legacy control-plane memory where bandwidth < 100 Mbps suffices | Use only for cost-sensitive, low-bandwidth subsystems where QDR timing and burst features are unnecessary. |
Compared with CY7C2665KV18-453BAXI and AS7C32560A-15PCN, UPD44647186AF5-E22-FQ1-A uniquely combines 450 MHz QDR II+ timing, QVLD signaling, and ZQ-calibrated ODT in a single 165-pin package - making it irreplaceable in new high-performance packet buffer designs requiring guaranteed data validity and impedance control.
Availability
UPD44647186AF5-E22-FQ1-A is available at Aetrix Electronics and suitable for high-speed packet buffering, telecom line card memory, wireless baseband processing, and real-time video frame storage requiring stable component supply across extended production lifecycles.
Supply support for UPD44647186AF5-E22-FQ1-A 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 infrastructure markets.
The UPD44647186AF5-E22-FQ1-A belongs to Renesas' QDR II+ SRAM product line, engineered specifically for deterministic, high-throughput memory access in networking and communications equipment where sub-nanosecond timing precision and signal integrity are critical.
FAQ
What is the read latency of UPD44647186AF5-E22-FQ1-A, and is it configurable?
The UPD44647186AF5-E22-FQ1-A has a fixed 2.5 clock cycle read latency, as specified in the ordering code suffix "-E22" (2.2 ns cycle time). This latency is not user-configurable - it is hardwired per the QDR II+ specification and cannot be changed via register or pin setting. The device does not support 2.0-cycle mode; that variant is implemented in the -E20/-E25 versions of the μPD44647184A-A family.
Does UPD44647186AF5-E22-FQ1-A support on-die termination (ODT), and how is it enabled?
Yes, UPD44647186AF5-E22-FQ1-A supports ODT on D0–D17 and BW0#/BW1# pins. ODT is enabled by holding the ODT pin HIGH during power-on initialization - it must be tied to VDDQ (≤10 kΩ pull-up) before stable clock is applied. Once set, the ODT state (ON/OFF) is locked and cannot be changed dynamically; RTT is fixed at 150 Ω (0.6 × RQ, with RQ = 250 Ω).
What is the function of the QVLD pin on UPD44647186AF5-E22-FQ1-A, and how is it timed?
The QVLD pin on UPD44647186AF5-E22-FQ1-A is a synchronous output that indicates when Q0–Q17 data is valid. It is edge-aligned with the CQ and CQ# echo clocks - meaning its rising/falling edge coincides precisely with the data-valid window. This allows receiving logic (e.g., FPGA) to use QVLD as a clean strobe for capturing burst data without additional timing margin calculation.
Can UPD44647186AF5-E22-FQ1-A operate with a 1.5 V VDDQ supply, and what are the implications?
Yes, UPD44647186AF5-E22-FQ1-A supports VDDQ = 1.5 ± 0.1 V (in addition to 1.8 V), as confirmed in the QDR II+ feature comparison table. Using 1.5 V reduces I/O power consumption and improves noise margin for HSTL Class I receivers, but requires matching VREF to VDDQ/2 (0.75 V) and verifying ODT impedance (RTT scales with RQ, not VDDQ). The core VDD remains fixed at 1.8 V.
What is the purpose of the ZQ pin on UPD44647186AF5-E22-FQ1-A, and how should it be connected?
The ZQ pin on UPD44647186AF5-E22-FQ1-A is used for output impedance calibration. It must be connected to a precision resistor (175–350 Ω) pulled to VSS - never left floating or tied directly to VDDQ/GND. During power-on, the device measures this resistance and sets driver/ODT impedance to 0.2×RQ (outputs) or 0.6×RQ (ODT). For minimum impedance, connect ZQ directly to VDDQ (not VSS).
UPD44647186AF5-E22-FQ1-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 165-LBGA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Synchronous, QDR II+
- Memory Size:
- 72Mbit
- Memory Organization:
- 4M x 18
- Memory Interface:
- Parallel
- Clock Frequency:
- 450 MHz
- Write Cycle Time - Word, Page:
- 2.2ns
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 1.9V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 165-PBGA (13x15)
UPD44647186AF5-E22-FQ1-A FAQ
1.How can I place an order for UPD44647186AF5-E22-FQ1-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD44647186AF5-E22-FQ1-A 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 UPD44647186AF5-E22-FQ1-A reliable?
The price and inventory of UPD44647186AF5-E22-FQ1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD44647186AF5-E22-FQ1-A is usually 5 days.
3.What payment methods are accepted for UPD44647186AF5-E22-FQ1-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD44647186AF5-E22-FQ1-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD44647186AF5-E22-FQ1-A?
UPD44647186AF5-E22-FQ1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD44647186AF5-E22-FQ1-A 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 UPD44647186AF5-E22-FQ1-A?
For technical support, including UPD44647186AF5-E22-FQ1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD44647186AF5-E22-FQ1-A requirements.
6.How does Aetrix verify that UPD44647186AF5-E22-FQ1-A is sourced from the original manufacturer or authorized distributors?
All UPD44647186AF5-E22-FQ1-A 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 UPD44647186AF5-E22-FQ1-A meets industry standards.
7.What is the process for return or replacement of UPD44647186AF5-E22-FQ1-A?
All UPD44647186AF5-E22-FQ1-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD44647186AF5-E22-FQ1-A, 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 UPD44647186AF5-E22-FQ1-A part is unused and in its original packaging.
Return procedure for UPD44647186AF5-E22-FQ1-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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