Winbond Electronics Corporation W956A8MBYA5I TR

Overview

W956A8MBYA5I TR from Winbond Electronics is a 64Mb HyperRAM device operating at 3.0V with HyperBus DDR interface, 200MHz clock rate (400 MT/s), and 24-ball TFBGA package. It serves as high-speed external memory for microcontrollers and SoCs in graphics, firmware, and real-time data buffering applications.

For engineers reviewing the W956A8MBYA5I TR datasheet, W956A8MBYA5I TR pinout, W956A8MBYA5I TR application, or W956A8MBYA5I TR equivalent, key selection criteria include 3.0V VCC/VCCQ supply compatibility, HyperBus timing compliance, RWDS-based latency signaling, and support for hybrid/linear/wrapped burst modes in embedded systems requiring low-pin-count high-bandwidth memory expansion.

Technical Context

The W956A8MBYA5I TR implements a DDR HyperBus interface with bidirectional RWDS for dynamic initial latency indication and read data strobing or write data masking. It supports configurable burst types (wrapped, linear, hybrid), partial array refresh, and multiple power-saving modes including Hybrid Sleep and Deep Power Down.

Its architecture uses separate VCC (1.7–2.0V or 2.7–3.6V) and VCCQ supplies, differential or single-ended clocking (CK/CK#), and 8-bit DQ[7:0] data bus with center-aligned writes and edge-aligned reads relative to RWDS transitions - enabling sustained 400 MB/s throughput under 200MHz operation.

Key Specifications

Pinout & Package

24-ball TFBGA (5×5 mm, 1-ball footprint), ball-down orientation. Package supports fine-pitch PCB routing and thermal dissipation in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W956D8MBYA5I, the W956A8MBYA5I TR operates at 3.0V and targets higher-voltage industrial hosts; versus IS66WVH8M8BLL-100BLI, it delivers 4× bandwidth and advanced latency management but requires HyperBus-capable controller hardware.

Availability

W956A8MBYA5I TR is available at Aetrix Electronics and suitable for graphics frame buffer, firmware storage, and real-time data logging applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.

Supply support for W956A8MBYA5I 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 SPI NOR, SPI NAND, and HyperRAM products for embedded and industrial markets.

The W956A8MBYA5I TR belongs to Winbond's HyperRAM family, designed specifically to replace parallel NOR flash and PSRAM in bandwidth-constrained, pin-limited applications such as automotive displays, IoT edge nodes, and real-time control systems.

FAQ

What is the operating voltage range for the W956A8MBYA5I TR?

The W956A8MBYA5I TR operates with VCC and VCCQ supplies in the 2.7V to 3.6V range, making it compatible with standard 3.3V system rails. This differs from the 1.8V W956D8MBYA5I variant and requires matching host I/O voltage levels. The device specifies separate VCC (core) and VCCQ (I/O) supplies to isolate noise-sensitive logic from high-speed data drivers, and both must be within this range for reliable W956A8MBYA5I TR operation.

Does the W956A8MBYA5I TR support differential clocking?

Yes, the W956A8MBYA5I TR supports both differential (CK/CK#) and single-ended (CK only) clocking modes. In differential mode, CK and CK# provide improved noise immunity and jitter tolerance for high-speed 200MHz operation. When using single-ended mode, CK# is left unconnected and the device functions with CK alone - no external circuitry changes are needed. This flexibility allows the W956A8MBYA5I TR to integrate into diverse controller platforms without requiring dedicated differential clock generators.

How does the RWDS signal function in the W956A8MBYA5I TR?

The RWDS signal in the W956A8MBYA5I TR is bidirectional and performs three critical roles: (1) during Command/Address transfer, it outputs high to indicate additional initial latency is required for refresh; (2) during read transactions, it acts as an edge-aligned read data strobe synchronized to DQ; and (3) during write transactions, it serves as a byte-level mask (high = masked, low = written). This dynamic behavior enables the W956A8MBYA5I TR to adapt latency and data integrity handling per transaction, eliminating fixed wait states and supporting efficient mixed-access patterns.

What burst modes are configurable in the W956A8MBYA5I TR?

The W956A8MBYA5I TR supports wrapped bursts (16/32/64/128 bytes), linear bursts, and hybrid bursts (one wrapped burst followed by linear). These are selected per transaction via Command/Address bits and configured in Configuration Register 0. Wrapped mode is ideal for cache-line-aligned accesses like instruction fetch; linear mode suits large contiguous transfers such as image streaming; hybrid mode combines both for mixed workloads. All modes operate at full 200MHz DDR speed, and the W956A8MBYA5I TR executes them without software overhead or address boundary constraints.

Is the W956A8MBYA5I TR pin-compatible with other Winbond HyperRAM devices?

The W956A8MBYA5I TR shares the same 24-ball TFBGA package and pinout with W956D8MBYA5I, W956A8MBYA6I, and W956D8MBYA6I - all members of the W956x8MBYA family. Ball assignments for CS#, CK/CK#, DQ[7:0], RWDS, RESET#, and power pins are identical across these variants. However, voltage and speed ratings differ: W956A8MBYA5I TR is 3.0V/200MHz, while W956D8MBYA5I is 1.8V/200MHz. Thus, W956A8MBYA5I TR is mechanically and electrically pin-compatible within its voltage family but requires matching host supply and timing margins.