Winbond Electronics Corporation W632GU8NB-12 TR

Overview

W632GU8NB-12 TR from Winbond is a 2Gb (256M × 8) DDR3L SDRAM organized in 8 banks, supporting DDR3L-1600 speed grade (11-11-11 CL-tRCD-tRP), 1.35V nominal VDD/VDDQ operation, and industrial temperature range (0°C to 95°C). It delivers 1600 MT/s data rates with programmable CAS latency (CL = 5–11), CWL (5–8), and on-die termination for high-speed memory subsystems in networking routers and embedded controllers.

For engineers reviewing the W632GU8NB-12 TR datasheet, W632GU8NB-12 TR pinout, W632GU8NB-12 TR application, or W632GU8NB-12 TR equivalent, key selection considerations include its VFBGA-78 package, DDR3L-1600 timing compliance, ZQ calibration support, asynchronous RESET# functionality, and compatibility with JEDEC-standard DDR3L controllers requiring low-voltage memory with dynamic ODT and write leveling.

Technical Context

This DDR3L SDRAM implements an 8-bit prefetch architecture synchronized to differential CK/CK# inputs, with bi-directional DQS/DQS# strobes edge-aligned on reads and center-aligned on writes. Its DLL aligns DQ and DQS transitions to CK, enabling stable 800 MHz clock operation (tCK = 1.25 ns).

The device supports full DDR3L feature set including posted CAS with additive latency (AL = 0, CL−1, CL−2), auto-precharge, burst chop (BC4) and burst length 8 (BL8), multi-purpose register (MPR) for system-level timing calibration, and dynamic ODT (Rtt_WR) for improved write signal integrity during high-speed transfers.

Key Specifications

Pinout & Package

VFBGA-78 package (8 mm × 10.5 mm, 1.0 mm thickness) with ball pitch of 0.8 mm, arranged in 6 rows × 13 columns (excluding corner voids), RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR3L SDRAM applications.

Compared with W632GU8NB-12 TR, the Micron alternative offers tighter AC parameter tolerances but higher self-refresh current above 85°C, while the ISSI part trades pin compatibility for wider data bus - making W632GU8NB-12 TR optimal for cost-sensitive, thermally constrained 8-bit DDR3L designs requiring PASR and write leveling.

Availability

W632GU8NB-12 TR is available at Aetrix Electronics and suitable for networking equipment, industrial PLC controllers, medical imaging subsystems, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle support, and consistent DDR3L-1600 timing performance.

Supply support for W632GU8NB-12 TR 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

Winbond Electronics is a Taiwan-based semiconductor company specializing in specialty memory solutions, including NOR/NAND Flash, SRAM, and DRAM products for industrial, automotive, and communications markets.

The W632GU8NB series belongs to Winbond's DDR3L SDRAM product line, designed specifically for power-constrained, thermally demanding embedded systems requiring JEDEC-compliant low-voltage memory with advanced calibration and power management features.

FAQ

What is the maximum clock frequency supported by W632GU8NB-12 TR?

W632GU8NB-12 TR supports a maximum clock frequency of 800 MHz (1600 MT/s data rate), corresponding to DDR3L-1600 speed grade with CL-tRCD-tRP = 11-11-11 timing. This is validated under VDD/VDDQ = 1.283 V to 1.45 V and 0°C ≤ TCASE ≤ 95°C, per JEDEC specification JESD79-3F.

Does W632GU8NB-12 TR support both 1.35 V and 1.5 V operation?

Yes, W632GU8NB-12 TR is fully backward compatible with standard DDR3 1.5 V operation (VDD/VDDQ = 1.5 V ± 0.075 V) while natively optimized for DDR3L 1.35 V operation (1.283 V–1.45 V). Voltage switching between modes is supported via controlled VDD/VDDQ ramp and MR register reconfiguration as specified in Section 12.4 of the datasheet.

How does the write leveling function work in W632GU8NB-12 TR?

W632GU8NB-12 TR implements hardware-assisted write leveling where the memory controller asserts a special command to place the device in write leveling mode. The DRAM then outputs a predefined MPR pattern on DQ while the controller adjusts DQS delay to center-align DQS edges with CK. This calibrates DQS-to-CK skew for reliable 1600 MT/s write capture.

What is the purpose of the Multi-Purpose Register (MPR) in W632GU8NB-12 TR?

The MPR in W632GU8NB-12 TR outputs a fixed 0101… bit pattern on DQ pins when enabled via MR3. This known pattern allows system designers to verify timing margins, perform eye diagram analysis, and validate signal integrity without requiring external pattern generators - critical for high-speed DDR3L validation and debug.

Can W632GU8NB-12 TR operate reliably at 95°C case temperature?

Yes, W632GU8NB-12 TR is rated for 0°C ≤ TCASE ≤ 95°C and supports extended temperature operation via MR2 configuration (A6 = 0b, A7 = 1b) to enable Manual Self-Refresh mode with doubled refresh rate (tREFI = 3.9 µS). This ensures data retention integrity under sustained 95°C thermal conditions without requiring external thermal mitigation.