Renesas UPD44324182BF5-E33-FQ1-A

Overview

UPD44324182BF5-E33-FQ1-A from Renesas Electronics is a 2,097,152-word × 18-bit synchronous double data rate (DDR II) SRAM with pipelined burst operation, 3.3 ns clock cycle time (300 MHz), 1.8 V core supply, and HSTL I/O interface. It integrates PLL-based timing control, echo clocks (CQ/CQ#), and JTAG 1149.1 test access for high-speed memory subsystems in networking and telecom baseband processing.

For engineers reviewing the UPD44324182BF5-E33-FQ1-A datasheet, UPD44324182BF5-E33-FQ1-A pinout, UPD44324182BF5-E33-FQ1-A application, or UPD44324182BF5-E33-FQ1-A equivalent, key selection considerations include its 165-pin plastic BGA package, dual-clock DDR timing (K/K# input, C/C# output), 2-word linear burst, user-programmable output impedance (35–70 Ω), and clock-stop capability with 20 μs recovery.

Technical Context

This DDR II SRAM uses full-CMOS six-transistor memory cells and implements synchronous peripheral circuitry with an internal burst counter. All inputs-including address (A0–A), control (LD#, R/W#, BW0#/BW1#), and clocks (K/K#)-are registered on the rising edge of K. Data I/O is double-pumped using both K/K# and C/C# edges, with CQ/CQ# providing tightly matched echo clocks for precise data valid windows.

The device features a PLL for jitter-tolerant operation down to 120 MHz, DLL#-controlled PLL disable for debug, and ZQ-calibrated output impedance matching. Its HSTL Class I-compliant I/O supports 1.5 V or 1.8 V VDDQ, and it delivers deterministic 2-cycle read/write latency with no external wait states required in standard configurations.

Key Specifications

Pinout & Package

UPD44324182BF5-E33-FQ1-A is housed in a 165-pin plastic BGA (15 × 17 mm grid, 0.8 mm pitch) with exposed thermal pad. Pin functions are defined per top-view layout in datasheet Rev.2.00 Page 5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1551KV18-333BZI, UPD44324182BF5-E33-FQ1-A offers superior impedance control and tighter echo-clock alignment; compared with IS42S16160F-3BL, it delivers deterministic sub-2 ns read latency and eliminates refresh overhead - critical for real-time embedded control.

Availability

UPD44324182BF5-E33-FQ1-A is available at Aetrix Electronics and suitable for baseband processing, network packet buffering, and industrial motion control applications requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for UPD44324182BF5-E33-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 is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The μPD44324xxx family was designed specifically for high-speed, low-latency synchronous memory applications in telecom baseband, test equipment, and real-time control systems - emphasizing DDR timing precision, impedance control, and debug flexibility.

FAQ

What is the maximum supported clock frequency for UPD44324182BF5-E33-FQ1-A?

The UPD44324182BF5-E33-FQ1-A is rated for 300 MHz operation with a 3.3 ns clock cycle time. This is confirmed in the Ordering Information table (Page 2) and AC Characteristics (Page 19), where TKHKH (max) = 3.3 ns defines the fastest guaranteed timing. Operation above 300 MHz is not characterized and may violate setup/hold margins or PLL stability.

Does UPD44324182BF5-E33-FQ1-A require external termination resistors?

No. UPD44324182BF5-E33-FQ1-A supports user-programmable output impedance (35–70 Ω) via the ZQ pin connected to an external resistor to ground. When properly calibrated, this eliminates the need for external series termination resistors on DQ, CQ, and CQ# lines - reducing BOM count and PCB area.

How does the burst operation work in UPD44324182BF5-E33-FQ1-A?

The UPD44324182BF5-E33-FQ1-A implements a fixed 2-word linear burst. On a READ or WRITE cycle initiated with LD# low, the device accesses two consecutive 18-bit words starting at the loaded address. A0 determines the internal burst order: if A0 = 0, addresses A and A+1 are accessed; if A0 = 1, addresses A+1 and A are accessed - enabling random-start burst capability.

Can UPD44324182BF5-E33-FQ1-A operate without the PLL enabled?

Yes. Pulling DLL# low disables the PLL, allowing operation at frequencies below 120 MHz with reduced timing margins. In this mode, read latency becomes 1.0 clock cycle (vs. 2.0 in PLL-enabled mode), but AC/DC characteristics are not guaranteed. This mode is intended only for board-level debug and initialization verification.

What is the purpose of the C and C# output clocks in UPD44324182BF5-E33-FQ1-A?

The C and C# output clocks in UPD44324182BF5-E33-FQ1-A provide a user-controlled timing reference for synchronizing received data. C# aligns with the first output word, and C aligns with the second word. This decouples data timing from the input clock (K/K#), enabling precise flight-time compensation and eliminating the need for board-level trace length matching between clock and data nets.