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

Renesas UPD46364362BF1-E40Y-EQ1-A

Name: UPD46364362BF1-E40Y-EQ1-A
Brand: Renesas
SKU: UPD46364362BF1-E40Y-EQ1-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UPD46364362BF1-E40Y-EQ1-A

Manufacturer:: Renesas

Category:: Memory

Package:: -

Datasheet:: UPD46364362BF1-E40Y-EQ1-A.pdf

Description:: DDR SRAM, 1MX36, 0.45NS

Quantity:: RFQ Add To RFQ list

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Product details

Overview

UPD46364362BF1-E40Y-EQ1-A from NEC Electronics (now Renesas) is a 1,048,576-word × 36-bit synchronous double data rate (DDR II) SRAM with pipelined burst operation, HSTL interface, and 1.8 V core supply. It delivers 250 MHz clock frequency (4.0 ns cycle time), supports −40°C to +85°C industrial temperature range, and is packaged in 165-pin plastic BGA (13 × 15 mm). It serves as high-speed buffer memory in network packet processors and FPGA-based data path acceleration.

For engineers reviewing the UPD46364362BF1-E40Y-EQ1-A datasheet, UPD46364362BF1-E40Y-EQ1-A pinout, UPD46364362BF1-E40Y-EQ1-A application, or UPD46364362BF1-E40Y-EQ1-A equivalent, key selection considerations include its 36-bit wide DDR II interface, user-programmable output impedance (35–70 Ω), dual input/output clock pairs (K/K# and C/C#), echo clock outputs (CQ/CQ#), and JTAG 1149.1 test port support.

Technical Context

This device implements a synchronous 2-word linear burst architecture with address registration on K/K# rising edges and data synchronization to C/C# or K/K# depending on configuration. Its internal PLL enables precise output timing and wide data valid windows, while DLL# control allows PLL bypass for low-frequency debug operation.

The memory array uses full-CMOS six-transistor cells and integrates burst counter logic, byte-write enable (BW0#–BW3#), synchronous load (LD#), and impedance-matching via ZQ pin. All I/Os comply with JEDEC HSTL Class I standards, and power sequencing requires VDD/VDDQ stabilization before clock application and ≥20 μs PLL lock time.

Key Specifications

Parameter	Value and Actual Design Meaning
Organization	1,048,576 words × 36 bits = 36 Mbit total capacity
Clock frequency	250 MHz - defines maximum sustained transaction rate for burst reads/writes
Core supply voltage	1.8 ± 0.1 V - must be stable within ±0.1 V DC per 50 ns during PLL lock
Operating temperature	−40°C to +85°C - qualified for industrial-grade embedded systems
Package	165-pin plastic BGA (13 × 15 mm) - requires controlled-impedance PCB layout for HSTL signals
Interface standard	HSTL Class I - mandates VREF = VDDQ/2 reference and matched trace routing
Output impedance	User-programmable 35–70 Ω via ZQ pin and external resistor - enables dynamic bus termination calibration

Pinout & Package

Package: 165-pin plastic BGA (13 × 15 mm), lead-free, top-view pinout per R10DS0091EJ0400 Rev.4.00 Page 5.

Pin/Terminal	Circuit Role	Design Meaning
K, K#	Input clock pair	Registers all address/control inputs on rising edges; phase-aligned 180° differential pair required for timing integrity
C, C#	Output clock pair	Controls output data timing; rising edge of C# clocks first data word, C clocks second - enables flight-time matching
CQ, CQ#	Echo clock outputs	Tightly matched to DQ valid/hold windows (±0.1 ns); used as data-strobe replacement in source-synchronous interfaces
DQ0–DQ35	Data I/O bus	36-bit bidirectional DDR bus; all bits share same timing constraints and must meet setup/hold relative to K/K# or C/C#
BW0#–BW3#	Byte write enables	Four independent active-low signals enabling selective 9-bit writes within 36-bit word - eliminates read-modify-write overhead
ZQ	Impedance calibration input	Connects to external resistor to ground; sets DQ/CQ/CQ# output drive strength to 0.2 × RQ for bus impedance matching
LD#	Synchronous load	Active-low signal initiating burst address latching and defining read/write direction for next two-cycle transaction
R, W#	Read/write direction	High = read, low = write; sampled synchronously with LD# assertion on K rising edge
VREF	HSTL reference	Nominally VDDQ/2; provides threshold for all HSTL input buffers - must be decoupled and routed as critical analog net
VDD, VDDQ	Power supplies	VDD = 1.8 V core; VDDQ = 1.4–1.8 V I/O supply - must not exceed VDD by >0.5 V during power-up/down

Key Features

Feature	Design Value
Pipelined DDR operation	Enables continuous 2-word burst transfers at 250 MHz without pipeline stalls - doubles effective bandwidth vs. single-data-rate SRAM
Two-tick burst mode	Fixed 2-word burst length minimizes address bus activity and simplifies controller logic - reduces FPGA resource usage
Programmable output impedance	35–70 Ω tuning via ZQ pin eliminates need for discrete termination resistors - saves board space and improves signal integrity
Integrated echo clocks (CQ/CQ#)	Provides deterministic, low-skew data-valid indicators tightly matched to DQ - removes requirement for external delay-locked loops
JTAG 1149.1 test access	Enables boundary-scan testing and in-system debugging without dedicated test pads - reduces manufacturing test cost
PLL-based timing engine	Generates wide output data valid window and supports future frequency scaling up to 300 MHz - extends product lifecycle

Applications

Network Packet Processors	FPGA-Based Data Acceleration
Use Scenario: Storing ingress/egress packet headers and metadata in line-rate forwarding engines. IC Role / Device Role / Timing Role: High-bandwidth, low-latency buffer memory interfaced directly to packet parser/serializer logic. Use Value: 36-bit width matches common header sizes; 250 MHz DDR interface sustains 18 Gbps throughput for 10G+ Ethernet processing.	Use Scenario: Offloading compute-intensive tasks (e.g., encryption, compression) from host CPU using FPGA-accelerated pipelines. IC Role / Device Role / Timing Role: Shared scratchpad memory between FPGA fabric and external processor via AXI or similar interconnect. Use Value: Synchronous burst operation eliminates arbitration latency; HSTL interface ensures clean signal integrity at 250 MHz across FPGA-to-SRAM traces.
Industrial Real-Time Controllers	Test & Measurement Equipment
Use Scenario: Capturing and buffering sensor data streams in deterministic motion-control systems. IC Role / Device Role / Timing Role: Time-critical data capture buffer synchronized to system clock domain with sub-nanosecond jitter tolerance. Use Value: −40°C to +85°C rating ensures reliability in factory environments; clock-stop capability enables low-power idle states without data loss.	Use Scenario: Digitizing and storing high-speed waveform samples in oscilloscopes and logic analyzers. IC Role / Device Role / Timing Role: Deep memory buffer capturing consecutive samples at multi-GHz sampling rates via parallel ADC interfaces. Use Value: Echo clocks (CQ/CQ#) provide precise sample-valid timing; programmable impedance maintains signal fidelity on long probe-to-memory traces.

Network Packet Processors

FPGA-Based Data Acceleration

Use Scenario: Storing ingress/egress packet headers and metadata in line-rate forwarding engines.

IC Role / Device Role / Timing Role: High-bandwidth, low-latency buffer memory interfaced directly to packet parser/serializer logic.

Use Value: 36-bit width matches common header sizes; 250 MHz DDR interface sustains 18 Gbps throughput for 10G+ Ethernet processing.

Use Scenario: Offloading compute-intensive tasks (e.g., encryption, compression) from host CPU using FPGA-accelerated pipelines.

IC Role / Device Role / Timing Role: Shared scratchpad memory between FPGA fabric and external processor via AXI or similar interconnect.

Use Value: Synchronous burst operation eliminates arbitration latency; HSTL interface ensures clean signal integrity at 250 MHz across FPGA-to-SRAM traces.

Industrial Real-Time Controllers

Test & Measurement Equipment

Use Scenario: Capturing and buffering sensor data streams in deterministic motion-control systems.

IC Role / Device Role / Timing Role: Time-critical data capture buffer synchronized to system clock domain with sub-nanosecond jitter tolerance.

Use Value: −40°C to +85°C rating ensures reliability in factory environments; clock-stop capability enables low-power idle states without data loss.

Use Scenario: Digitizing and storing high-speed waveform samples in oscilloscopes and logic analyzers.

IC Role / Device Role / Timing Role: Deep memory buffer capturing consecutive samples at multi-GHz sampling rates via parallel ADC interfaces.

Use Value: Echo clocks (CQ/CQ#) provide precise sample-valid timing; programmable impedance maintains signal fidelity on long probe-to-memory traces.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Cypress CY7C2663KV18	2M × 18 organization, 250 MHz, 1.8 V, 165-pin BGA - narrower data bus, identical timing and interface	Requires depth expansion (2×) to match 36-bit width; higher pin count per bit in system-level layout	Select when 18-bit bus width aligns with existing controller design and board space permits dual-device placement.
Renesas R1EX24036ASB	1M × 36 organization, 200 MHz, 1.8 V, 165-pin BGA - slower max frequency, same package and pinout	Lower bandwidth (1.44 Gbps vs. 1.8 Gbps) but broader temperature margin (−40°C to +105°C)	Select when thermal environment exceeds +85°C and 200 MHz suffices for application throughput requirements.

Compared with CY7C2663KV18 and R1EX24036ASB, UPD46364362BF1-E40Y-EQ1-A delivers optimal balance of 36-bit width, 250 MHz speed, and industrial temperature range - eliminating need for bus expansion while maintaining compatibility with HSTL-based FPGA and ASIC controllers.

Availability

UPD46364362BF1-E40Y-EQ1-A is available at Aetrix Electronics and suitable for network infrastructure, FPGA acceleration, industrial control, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for UPD46364362BF1-E40Y-EQ1-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 (formerly NEC Electronics) is a global semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The μPD46364xxx family was designed specifically for high-speed, low-latency DDR II SRAM applications in packet-processing and real-time embedded systems where synchronous burst bandwidth and precise timing control are critical.

FAQ

What is the maximum operating frequency of the UPD46364362BF1-E40Y-EQ1-A?

The UPD46364362BF1-E40Y-EQ1-A is rated for 250 MHz operation with a 4.0 ns clock cycle time. This frequency is guaranteed across the full −40°C to +85°C industrial temperature range and 1.8 V ±0.1 V supply. The device also supports 300 MHz (3.3 ns) operation in commercial-grade variants (e.g., UPD46364362BF1-E33Y-EQ1-A), but the -E40Y suffix confirms the 250 MHz specification for this part.

Does the UPD46364362BF1-E40Y-EQ1-A require external termination resistors?

No, the UPD46364362BF1-E40Y-EQ1-A does not require external series or parallel termination resistors. Its output impedance is programmable from 35 Ω to 70 Ω via the ZQ pin and an external resistor to ground. This integrated calibration eliminates discrete terminations while ensuring optimal signal integrity on HSTL buses.

How does the UPD46364362BF1-E40Y-EQ1-A handle clock stop and restart?

The UPD46364362BF1-E40Y-EQ1-A supports clock-stop mode: when K/K# are halted, all outputs enter high-impedance state and internal state is preserved. Normal operation resumes within 20 μs after clock resumption - no reset sequence or reinitialization is needed. During stop, C/C# and CQ/CQ# also halt, maintaining deterministic behavior.

What is the function of the CQ and CQ# pins on the UPD46364362BF1-E40Y-EQ1-A?

The CQ and CQ# pins on the UPD46364362BF1-E40Y-EQ1-A are synchronous echo clocks that track DQ output timing with ±0.1 ns variation. They provide precise, low-skew data-valid indicators for source-synchronous interfaces - eliminating reliance on fixed delay chains or external DLLs in FPGA or ASIC receiver logic.

Can the UPD46364362BF1-E40Y-EQ1-A be used with a 1.5 V VDDQ supply?

Yes, the UPD46364362BF1-E40Y-EQ1-A supports VDDQ from 1.4 V to 1.8 V, including 1.5 V nominal operation. When using 1.5 V VDDQ, VREF must be set to VDDQ/2 = 0.75 V, and all HSTL input thresholds scale accordingly. DC and AC characteristics remain fully specified across this range per R10DS0091EJ0400 Rev.4.00 Pages 13–15.

UPD46364362BF1-E40Y-EQ1-A 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:: -

UPD46364362BF1-E40Y-EQ1-A FAQ

1.How can I place an order for UPD46364362BF1-E40Y-EQ1-A through Aetrix?

Please submit a Request for Quotation (RFQ) for UPD46364362BF1-E40Y-EQ1-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 UPD46364362BF1-E40Y-EQ1-A reliable?

The price and inventory of UPD46364362BF1-E40Y-EQ1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD46364362BF1-E40Y-EQ1-A is usually 5 days.

3.What payment methods are accepted for UPD46364362BF1-E40Y-EQ1-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD46364362BF1-E40Y-EQ1-A transactions.

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4.How is shipping managed for UPD46364362BF1-E40Y-EQ1-A?

UPD46364362BF1-E40Y-EQ1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UPD46364362BF1-E40Y-EQ1-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 UPD46364362BF1-E40Y-EQ1-A?

For technical support, including UPD46364362BF1-E40Y-EQ1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD46364362BF1-E40Y-EQ1-A requirements.

6.How does Aetrix verify that UPD46364362BF1-E40Y-EQ1-A is sourced from the original manufacturer or authorized distributors?

All UPD46364362BF1-E40Y-EQ1-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 UPD46364362BF1-E40Y-EQ1-A meets industry standards.

7.What is the process for return or replacement of UPD46364362BF1-E40Y-EQ1-A?

All UPD46364362BF1-E40Y-EQ1-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD46364362BF1-E40Y-EQ1-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 UPD46364362BF1-E40Y-EQ1-A part is unused and in its original packaging.

Return procedure for UPD46364362BF1-E40Y-EQ1-A:

1.Submit a request within 90 days.

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

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