Renesas UPD44324185BF5-E33-FQ1-A

Overview

UPD44324185BF5-E33-FQ1-A from Renesas Electronics is a 2,097,152-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 165-pin plastic BGA (15 × 17) packaging. It delivers pipelined DDR read/write bursts of two words per cycle for high-bandwidth memory buffering in network packet processors.

For engineers reviewing the UPD44324185BF5-E33-FQ1-A datasheet, UPD44324185BF5-E33-FQ1-A pinout, UPD44324185BF5-E33-FQ1-A application, or UPD44324185BF5-E33-FQ1-A equivalent, key selection criteria include DDR timing compliance (K/K# and C/C# dual-clock architecture), user-programmable output impedance (35–70 Ω via ZQ), HSTL Class I I/O compatibility, and JTAG 1149.1 test access support.

Technical Context

This device implements a fully synchronous DDR II SRAM architecture with independent read/write data ports, a burst counter, and integrated PLL for output data valid window extension. All address, control, and data inputs are registered on rising edges of K and K#, while outputs are synchronized to C and C# (or K/K# if C/C# are tied HIGH).

The memory array uses full-CMOS six-transistor cells and supports clock-stop mode with 20 μs recovery. Its HSTL I/O interface meets JEDEC Class I standards, and output impedance is calibrated via external ZQ resistor to match system bus termination.

Key Specifications

Pinout & Package

UPD44324185BF5-E33-FQ1-A is housed in a 165-pin plastic BGA package with 15 × 17 ball grid (index mark per datasheet). Pin functions are validated per R10DS0037EJ0200 Rev.2.00, Page 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2665KV18 and IS42S32400F, UPD44324185BF5-E33-FQ1-A uniquely combines 1.8 V core operation, 300 MHz DDR II performance, on-die impedance tuning, and echo-clock timing assurance - making it optimal for deterministic, high-throughput embedded memory subsystems.

Availability

UPD44324185BF5-E33-FQ1-A is available at Aetrix Electronics and suitable for network packet buffering, high-speed test equipment memory, baseband signal processing, and industrial real-time control buffer applications requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.

Supply support for UPD44324185BF5-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 manufacturer specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and communications markets.

The μPD44324xxB product line was designed specifically for high-bandwidth, low-latency DDR II SRAM applications in networking and test equipment - emphasizing synchronous timing precision, HSTL interoperability, and robust thermal performance in BGA packages.

FAQ

What is the maximum guaranteed clock frequency for UPD44324185BF5-E33-FQ1-A?

The UPD44324185BF5-E33-FQ1-A is rated for 300 MHz operation with a 3.3 ns clock cycle time, as specified in the ordering information table (R10DS0037EJ0200 Rev.2.00, Page 2). This frequency is guaranteed across the full 0 °C to +70 °C operating temperature range and requires stable K/K# input clock with ≤0.2 ns peak-to-peak phase jitter.

Does UPD44324185BF5-E33-FQ1-A support true dual-port operation with simultaneous read and write?

UPD44324185BF5-E33-FQ1-A supports separate read and write data ports (Q0–Q17 and D0–D17), but it is not a true dual-port SRAM. Read and write operations are time-multiplexed within the same clock domain using LD# and R,W# control; concurrent access to the same address is not permitted, and burst cycles are sequential.

How is output impedance calibrated on UPD44324185BF5-E33-FQ1-A?

Output impedance calibration on UPD44324185BF5-E33-FQ1-A is performed via the ZQ pin, which connects to an external resistor to ground. The device sets Q, CQ, and CQ# output impedance to 0.2 × RQ, yielding 35–70 Ω range. Calibration occurs automatically every 20 μs after power-up and adjusts for voltage/temperature drift.

Can UPD44324185BF5-E33-FQ1-A operate without the PLL enabled?

Yes - UPD44324185BF5-E33-FQ1-A can operate with the PLL disabled by asserting DLL# = LOW. In this mode, read latency reduces to 1.0 clock cycle, but AC/DC characteristics are not guaranteed, and operation is limited to frequencies below TKHKH (MAX.). For full specification compliance, DLL# must be held HIGH.

What is the function of CQ and CQ# pins on UPD44324185BF5-E33-FQ1-A?

CQ and CQ# are synchronous echo clock outputs tightly matched to Q data outputs (±0.1 ns variation). They provide a hardware-validated data-valid timing reference independent of C/C# state, enabling precise setup/hold verification at the receiving device - especially valuable in high-speed test and packet-forwarding applications.