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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas UPD44646363AF5-E22-FQ1-A

Name: UPD44646363AF5-E22-FQ1-A
Brand: Renesas
SKU: UPD44646363AF5-E22-FQ1-A
Price: 2.40 USD
Availability: InStock
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Part No.:: UPD44646363AF5-E22-FQ1-A

Manufacturer:: Renesas

Category:: Memory

Package:: 165-LBGA

Datasheet:: UPD44646363AF5-E22-FQ1-A.pdf

Description:: IC SRAM 72MBIT PARALLEL 165PBGA

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Product details

Overview

UPD44646363AF5-E22-FQ1-A from Renesas Electronics is a 2,097,152-word × 36-bit synchronous double data rate (DDR II+) SRAM with 2.5 clock cycles read latency, HSTL interface, and 165-pin plastic BGA (15 × 17 mm) packaging. It operates at 1.8 V core supply, supports 450 MHz clock frequency (2.2 ns cycle time), and integrates DLL/PLL, on-die termination (ODT), QVLD, and JTAG 1149.1 test access - deployed in high-speed networking line cards requiring burst-mode memory buffering.

For engineers reviewing the UPD44646363AF5-E22-FQ1-A datasheet, UPD44646363AF5-E22-FQ1-A pinout, UPD44646363AF5-E22-FQ1-A application, or UPD44646363AF5-E22-FQ1-A equivalent, this page delivers verified timing parameters, validated DDR II+ burst behavior, confirmed ODT impedance settings, and precise pin-level functional mapping for system-level signal integrity and layout validation.

Technical Context

The UPD44646363AF5-E22-FQ1-A implements pipelined double data rate operation synchronized to K/K# input clocks, with echo clocks CQ/CQ# edge-aligned to output data for precise timing capture. Its internal DLL/PLL locks to stable 450 MHz input, enabling a wide output data valid window and supporting future frequency scaling up to 500 MHz.

It uses a common data I/O bus with two-word burst addressing, user-programmable output impedance (35–70 Ω), and on-die termination (ODT) configurable at power-on via the ODT pin - where RTT = 0.6 × RQ (RQ = 175–350 Ω) - ensuring signal quality on high-speed backplanes without external termination resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	2,097,152 words × 36 bits (72 Mbit total density)
Read Latency	2.5 clock cycles - fixed at power-on; no runtime selection
Clock Frequency	450 MHz (2.2 ns cycle time) - guaranteed AC performance at this speed
Supply Voltage	1.8 V ± 0.1 V core (VDD); 1.5/1.8 V I/O (VDDQ) - dual-rail HSTL compatibility
Interface Standard	HSTL Class I - requires VREF = VDDQ/2 reference for input buffers
Output Impedance	User programmable 35–70 Ω - calibrated via ZQ pin and external resistor to ground
On-Die Termination	ODT enabled at power-on if ODT pin = HIGH; RTT = 150 Ω (typ.) when RQ = 250 Ω
Package	165-pin plastic BGA (15 mm × 17 mm, 1.0 mm pitch) - RoHS-compliant lead-free

Pinout & Package

UPD44646363AF5-E22-FQ1-A is housed in a 165-pin plastic BGA (15 × 17 mm, 1.0 mm pitch) with bottom-side thermal pad not electrically connected. Pin functions are validated per Renesas Data Sheet M19960EJ2V0DS, Section 6 (Pin Configurations for μPD44646362A-A / μPD44646363A-A).

Pin/Terminal	Circuit Role	Design Meaning
A[0–19]	Synchronous Address Input	Registered on rising edge of K; defines burst start address (A+0, A+1) for 2-word linear burst
DQ0–DQ35	Synchronous Data I/O	Double-data-rate inputs/outputs aligned to K/K# rising edges; shared bus for read/write
K, K#	Differential Input Clock	Registers all control and data on rising edges only; 180° phase alignment required
CQ, CQ#	Echo Clock Output	Rising edges edge-aligned with DQ outputs; used as data-valid strobe, independent of clock stop
QVLD	Data Valid Indicator	Asserted synchronously with CQ/CQ# rising edges; confirms DQ output validity during reads
ODT	On-Die Termination Control	Set HIGH before stable clock applied to enable ODT on DQ/BW# pins; state fixed after power-on
ZQ	Impedance Calibration Input	Connected to external resistor (175–350 Ω) to ground; sets DQ/CQ/QVLD output impedance to 0.2×RQ
LD#, R,W#, BW0#–BW3#	Control Inputs	LD# loads address/control; R,W# selects read/write; BWx# enables byte-write masking per 9-bit group

Key Features

Feature	Design Value
2-Word Burst Operation	Minimizes DDR transaction size for low-latency packet buffering in telecom switching fabrics
QVLD + Echo Clocks (CQ/CQ#)	Provides deterministic, edge-aligned data-valid signaling - eliminates need for external strobes in FPGA interfacing
Programmable Output Impedance	35–70 Ω range calibrated via ZQ pin enables precise trace impedance matching on 50–75 Ω PCBs
On-Die Termination (ODT)	RTT = 150 Ω (typ.) reduces stub reflections and improves eye diagram margin on dense backplane traces
JTAG 1149.1 Test Access	Full boundary-scan support (TMS/TCK/TDI/TDO) enables in-system verification of BGA solder joints and interconnects
Clock-Stop Capability	Enters low-power state within 20 µs; resumes normal operation identically upon clock restart - no reinitialization needed

Applications

Telecom Line Card Buffering	High-Speed Test Equipment Memory
Use Scenario: Storing and forwarding variable-length ATM or Ethernet frames in OC-192/STM-64 line interface modules. IC Role / Device Role / Timing Role: DDR II+ SRAM acting as burst-mode first-in-first-out (FIFO) buffer between SERDES and packet processor, synchronized to 450 MHz system clock. Use Value: 2.5-cycle read latency and QVLD enable deterministic frame extraction timing; ODT ensures clean signal integrity across 12+ inch backplane traces.	Use Scenario: Capturing high-resolution waveform samples in automated test equipment (ATE) with >500 MS/s sampling rates. IC Role / Device Role / Timing Role: High-density, low-latency memory staging sampled data before transfer to host controller via parallel HSTL bus. Use Value: 72 Mbit capacity and 450 MHz interface sustain sustained 3.6 Gbps throughput; DLL/PLL guarantees jitter-tolerant timing under varying thermal conditions.
Network Processor Co-Processor Cache	Industrial Real-Time Controller Data Buffer
Use Scenario: Offloading packet classification and lookup table storage from network processors in Layer 3 switches. IC Role / Device Role / Timing Role: External cache extension providing fast random-access to TCAM-equivalent rule tables using burst-addressed reads. Use Value: 36-bit wide bus matches typical NPU data path width; 2-word burst minimizes address overhead per rule fetch.	Use Scenario: Buffering sensor fusion data streams (IMU, ADC, encoder) in deterministic motion-control systems with <1 µs jitter tolerance. IC Role / Device Role / Timing Role: Synchronous SRAM serving as zero-wait-state scratchpad for real-time DSP cores executing closed-loop PID algorithms. Use Value: Clock-stop capability allows dynamic power gating between control cycles; HSTL interface ensures noise immunity in electrically noisy factory environments.

Telecom Line Card Buffering

High-Speed Test Equipment Memory

Use Scenario: Storing and forwarding variable-length ATM or Ethernet frames in OC-192/STM-64 line interface modules.

IC Role / Device Role / Timing Role: DDR II+ SRAM acting as burst-mode first-in-first-out (FIFO) buffer between SERDES and packet processor, synchronized to 450 MHz system clock.

Use Value: 2.5-cycle read latency and QVLD enable deterministic frame extraction timing; ODT ensures clean signal integrity across 12+ inch backplane traces.

Use Scenario: Capturing high-resolution waveform samples in automated test equipment (ATE) with >500 MS/s sampling rates.

IC Role / Device Role / Timing Role: High-density, low-latency memory staging sampled data before transfer to host controller via parallel HSTL bus.

Use Value: 72 Mbit capacity and 450 MHz interface sustain sustained 3.6 Gbps throughput; DLL/PLL guarantees jitter-tolerant timing under varying thermal conditions.

Network Processor Co-Processor Cache

Industrial Real-Time Controller Data Buffer

Use Scenario: Offloading packet classification and lookup table storage from network processors in Layer 3 switches.

IC Role / Device Role / Timing Role: External cache extension providing fast random-access to TCAM-equivalent rule tables using burst-addressed reads.

Use Value: 36-bit wide bus matches typical NPU data path width; 2-word burst minimizes address overhead per rule fetch.

Use Scenario: Buffering sensor fusion data streams (IMU, ADC, encoder) in deterministic motion-control systems with <1 µs jitter tolerance.

IC Role / Device Role / Timing Role: Synchronous SRAM serving as zero-wait-state scratchpad for real-time DSP cores executing closed-loop PID algorithms.

Use Value: Clock-stop capability allows dynamic power gating between control cycles; HSTL interface ensures noise immunity in electrically noisy factory environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C2665KV18-450BZXC	4M × 18 organization (72 Mbit), 450 MHz, 2.5-cycle latency, 165-pin BGA - same density but x18 bus width	Requires two devices for 36-bit data path; no QVLD or echo clocks; uses SSTL instead of HSTL	Select when existing design uses SSTL infrastructure and board space permits dual-device layout
IS42S32800J-45BL	2M × 32 SDRAM (64 Mbit), 450 MHz, CL=3, 90-pin TSOP - asynchronous command interface, no DLL/PLL	Lacks QVLD, ODT, and echo clocks; requires refresh management; lower signal integrity on long traces	Select only for cost-sensitive, non-critical buffering where deterministic timing and signal integrity are secondary

Compared with CY7C2665KV18-450BZXC and IS42S32800J-45BL, UPD44646363AF5-E22-FQ1-A uniquely delivers 36-bit native bus width, HSTL-compatible echo-clock timing, and programmable ODT - making it optimal for single-chip, high-signal-integrity DDR II+ buffering in telecom and test equipment.

Availability

UPD44646363AF5-E22-FQ1-A is available at Aetrix Electronics and suitable for high-speed networking line cards, automated test equipment, network processor co-processor caches, and industrial real-time controller data buffering requiring stable component supply across extended production lifecycles.

Supply support for UPD44646363AF5-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 UPD44646363AF5-E22-FQ1-A belongs to Renesas' DDR II+ SRAM product line, engineered specifically for high-bandwidth, low-latency synchronous buffering in telecom infrastructure and test instrumentation where deterministic timing and signal integrity are critical.

FAQ

What is the exact read latency of UPD44646363AF5-E22-FQ1-A, and is it configurable?

The UPD44646363AF5-E22-FQ1-A has a fixed 2.5 clock cycles read latency, as defined by its part number suffix "-E22" (2.2 ns cycle time) and "-FQ1-A" package variant. This latency is not user-configurable - it is hardwired at manufacturing and confirmed in Renesas Data Sheet M19960EJ2V0DS Table 2. The device does not support runtime latency selection or mode registers.

Does UPD44646363AF5-E22-FQ1-A support on-die termination (ODT), and how is it enabled?

Yes, UPD44646363AF5-E22-FQ1-A supports ODT. It is enabled by holding the ODT pin HIGH prior to applying a stable clock during power-on initialization. Once set, the ODT state is locked - RTT = 0.6 × RQ (150 Ω typ. when RQ = 250 Ω) - and cannot be changed dynamically. The ODT function terminates DQ0–DQ35 and BW0#–BW3# pins to VDDQ/VSS.

What is the role of the QVLD pin on UPD44646363AF5-E22-FQ1-A, and how does it relate to CQ/CQ#?

The QVLD pin on UPD44646363AF5-E22-FQ1-A is a synchronous output that indicates valid data on DQ0–DQ35 during read operations. It is edge-aligned with the rising edges of CQ and CQ# - meaning QVLD asserts precisely when output data is stable and ready to be captured by the receiving logic, eliminating setup/hold uncertainty in high-speed interfaces.

Can UPD44646363AF5-E22-FQ1-A operate with a 1.5 V VDDQ supply, and what are the implications?

Yes, UPD44646363AF5-E22-FQ1-A supports 1.5 V ± 0.1 V for VDDQ, as specified in Renesas' DDR II+ feature comparison table. Using 1.5 V VDDQ reduces I/O power consumption and improves noise margin in mixed-voltage systems, but requires VREF = VDDQ/2 = 0.75 V and may slightly reduce maximum achievable frequency versus 1.8 V VDDQ operation.

What is the function of the ZQ pin on UPD44646363AF5-E22-FQ1-A, and what resistor value is recommended?

The ZQ pin on UPD44646363AF5-E22-FQ1-A calibrates output driver impedance. It must be connected to a precision resistor (175–350 Ω, typ. 250 Ω) tied to ground. This sets DQ/CQ/QVLD output impedance to 0.2 × RQ (50 Ω typ.), and ODT termination resistance to 0.6 × RQ (150 Ω typ.). Leaving ZQ unconnected or tying it to VDDQ/VSS violates specification and disables calibration.

UPD44646363AF5-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, DDR II+

Memory Size:: 72Mbit

Memory Organization:: 2M x 36

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)

UPD44646363AF5-E22-FQ1-A FAQ

1.How can I place an order for UPD44646363AF5-E22-FQ1-A through Aetrix?

Please submit a Request for Quotation (RFQ) for UPD44646363AF5-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 UPD44646363AF5-E22-FQ1-A reliable?

The price and inventory of UPD44646363AF5-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 UPD44646363AF5-E22-FQ1-A is usually 5 days.

3.What payment methods are accepted for UPD44646363AF5-E22-FQ1-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD44646363AF5-E22-FQ1-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UPD44646363AF5-E22-FQ1-A?

UPD44646363AF5-E22-FQ1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UPD44646363AF5-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 UPD44646363AF5-E22-FQ1-A?

For technical support, including UPD44646363AF5-E22-FQ1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD44646363AF5-E22-FQ1-A requirements.

6.How does Aetrix verify that UPD44646363AF5-E22-FQ1-A is sourced from the original manufacturer or authorized distributors?

All UPD44646363AF5-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 UPD44646363AF5-E22-FQ1-A meets industry standards.

7.What is the process for return or replacement of UPD44646363AF5-E22-FQ1-A?

All UPD44646363AF5-E22-FQ1-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD44646363AF5-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 UPD44646363AF5-E22-FQ1-A part is unused and in its original packaging.

Return procedure for UPD44646363AF5-E22-FQ1-A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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