Renesas UPD44164182BF5-E33Y-EQ3-A

Overview

UPD44164182BF5-E33Y-EQ3-A from Renesas Electronics is a 1,048,576-word × 18-bit synchronous double data rate (DDR II) SRAM with HSTL interface, 1.8 V core supply, 300 MHz clock operation (3.3 ns cycle time), and industrial temperature range (−40 to +85°C). It integrates PLL-based timing control, echo clocks (CQ/CQ#), and user-programmable output impedance for high-speed memory subsystems in networking and test equipment.

For engineers reviewing the UPD44164182BF5-E33Y-EQ3-A datasheet, UPD44164182BF5-E33Y-EQ3-A pinout, UPD44164182BF5-E33Y-EQ3-A application, or UPD44164182BF5-E33Y-EQ3-A equivalent, this page delivers verified DDR II SRAM specifications including burst timing, HSTL I/O compliance, JTAG 1149.1 support, ZQ impedance calibration, and industrial-grade thermal performance.

Technical Context

This device implements pipelined DDR operation using dual input clocks (K/K#) for address/control latching and dual output clocks (C/C#) for precise data delivery timing. Its internal burst counter enables fixed two-word linear bursts, and echo clocks CQ/CQ# are tightly matched to DQ outputs for reliable data valid windows.

The integrated PLL supports wide output data valid windows and frequency scaling up to 300 MHz, while DLL# allows PLL bypass during debug. Output impedance is calibrated via ZQ pin against an external resistor, supporting 35–70 Ω tuning per JEDEC HSTL Class I standards.

Key Specifications

Pinout & Package

165-pin Plastic BGA (13 × 15 mm, 0.8 mm pitch), RoHS-compliant lead-free package with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1551KV18-333BZXC and IS42S16160J-3BL, UPD44164182BF5-E33Y-EQ3-A provides HSTL Class I compatibility, ZQ-calibrated output impedance, and echo clocks-critical for deterministic timing in high-speed test and telecom systems where signal integrity and jitter tolerance are design constraints.

Availability

UPD44164182BF5-E33Y-EQ3-A is available at Aetrix Electronics and suitable for high-speed network packet buffering, automated test equipment (ATE) memory subsystems, and industrial base station digital front-end applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for UPD44164182BF5-E33Y-EQ3-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 is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and communications markets.

The μPD44164xx2B product line delivers high-density, low-latency DDR II SRAMs optimized for deterministic timing-critical applications such as test instrumentation, telecom infrastructure, and real-time signal processing.

FAQ

What is the operating temperature range of UPD44164182BF5-E33Y-EQ3-A?

The UPD44164182BF5-E33Y-EQ3-A is rated for industrial operation from −40°C to +85°C ambient temperature. This is confirmed in the Ordering Information table (Page 2) and DC Characteristics 2 section (Page 14) of the datasheet R10DS0014EJ0200 Rev.2.00. The "Y" suffix explicitly denotes the extended temperature grade, distinguishing it from commercial-grade variants (0 to 70°C).

Does UPD44164182BF5-E33Y-EQ3-A support JTAG boundary-scan testing?

Yes, UPD44164182BF5-E33Y-EQ3-A supports IEEE 1149.1 JTAG boundary-scan testing. Pins TCK (2R), TMS (10R), TDI (11R), and TDO (1R) form a compliant 1.8 V I/O TAP interface, documented on Page 21 of the datasheet. The device implements a limited subset of JTAG instructions but supports mandatory boundary-scan functionality for interconnect testing.

How does the ZQ pin function on UPD44164182BF5-E33Y-EQ3-A?

The ZQ pin on UPD44164182BF5-E33Y-EQ3-A calibrates output driver impedance for DQ, CQ, and CQ# pins. As specified on Page 6, connecting ZQ to ground through a resistor RQ sets output impedance to 0.2 × RQ (e.g., 175–350 Ω yields 35–70 Ω). Calibration occurs automatically every 20 μs after power-up, compensating for voltage and temperature drift without host intervention.

What is the role of CQ and CQ# pins on UPD44164182BF5-E33Y-EQ3-A?

CQ and CQ# are synchronous echo clock outputs on UPD44164182BF5-E33Y-EQ3-A, tightly matched to DQ data edges (±0.1 ns variation, Page 17 Note 6). They provide a deterministic, low-skew timing reference for receiving devices to capture data, independent of C/C# or K/K# states. Unlike C/C#, CQ/CQ# continue running even when DQ tristates, enabling robust data valid detection.

Can UPD44164182BF5-E33Y-EQ3-A operate without its PLL enabled?

Yes, UPD44164182BF5-E33Y-EQ3-A can operate with the PLL disabled by asserting DLL# = LOW, as described on Page 6. In this mode, read latency reduces to 1.0 clock cycle, but AC/DC characteristics are not guaranteed per datasheet specification. Normal operation requires DLL# = HIGH (tied to VDDQ via ≤10 kΩ resistor), and PLL lock requires ≥20 μs of stable K clock after power-up (Page 8).