Infineon Technologies S27KS0642GABHB020

Overview

S27KS0642GABHB020 from Infineon Technologies is a 64Mb self-refresh DRAM (PSRAM) with HYPERBUS™ interface, operating at 1.8 V or 3.0 V VCC/VCCQ, supporting DDR transfers up to 200 MHz clock rate and 400 MBps throughput. It features bidirectional RWDS strobe, configurable burst lengths (16–128 bytes), partial/full array refresh, and industrial temperature range (–40°C to +85°C) in 24-ball FBGA package. Used as high-bandwidth external memory for microcontrollers in automotive instrument clusters.

For engineers reviewing the S27KS0642GABHB020 datasheet, S27KS0642GABHB020 pinout, S27KS0642GABHB020 application, or S27KS0642GABHB020 equivalent, key selection criteria include HYPERBUS™ timing compliance, RWDS phase alignment support, DCARS capability, burst configuration flexibility, and AEC-Q100 Grade 3 qualification for automotive use.

Technical Context

This PSRAM integrates dynamic DRAM cells with on-die refresh control logic, eliminating host-managed refresh while maintaining static RAM-like interface behavior. Its HYPERBUS™ interface uses only 11–12 signals (including optional CK#), with command/address/data multiplexed over DQ[7:0] and RWDS serving dual roles: read-data strobe and write-data mask.

The device supports linear and wrapped burst modes, hybrid sleep and deep power-down states, and configurable output drive strength. DCARS functionality enables center-aligned RWDS edge placement during reads to maximize data eye margin at 200 MHz DDR operation.

Key Specifications

Pinout & Package

Package: 24-ball FBGA (5 mm × 5 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S27KL0641GABHI020, the S27KS0642GABHB020 adds DCARS and AEC-Q100 Grade 3, making it suitable for automotive timing-critical applications; versus IS66WV12816EBLL-15BLI, it offers 4× bandwidth with half the pins but requires HYPERBUS™-capable host controllers.

Availability

S27KS0642GABHB020 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMI display buffers, ADAS camera preprocessing, and smart gateway message queuing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S27KS0642GABHB020 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and memory solutions, with global R&D and manufacturing infrastructure.

This part belongs to the HYPERRAM™ product line, designed specifically to deliver high-bandwidth, low-pin-count external memory for automotive and industrial MCUs needing PSRAM performance without DRAM complexity.

FAQ

Does S27KS0642GABHB020 require external refresh circuitry?

No. It contains on-die self-refresh logic that automatically manages DRAM cell refresh during idle periods or hybrid sleep mode. The host processor never initiates or schedules refresh cycles - the device appears as static RAM to software, though internal refresh occurs transparently when CS# is deasserted and no transaction is active.

What is the function of RWDS in write versus read operations?

In read operations, RWDS is driven by the device as an output: first indicating initial access latency, then acting as a read-data strobe aligned with DQ transitions. In write operations, RWDS is driven by the host as an input to mask individual bytes on DQ[7:0], enabling partial-word writes without read-modify-write sequences.

Can S27KS0642GABHB020 operate with single-ended clock only?

Yes. The device supports both single-ended (CK only) and differential (CK/CK#) clock configurations. When using single-ended mode, CK# must be tied to VSS or VCC per datasheet guidelines; DCARS functionality is only available with differential clock enabled, as it relies on the phase relationship between CK and CK#.

How does burst length configuration affect timing behavior?

Burst length is set via Configuration Register 0 and determines the number of consecutive 16-bit transfers per transaction. Longer bursts (e.g., 128 bytes) increase throughput but extend transaction duration, limiting opportunities for internal refresh. Shorter bursts allow more frequent refresh windows and reduce worst-case latency between successive commands, critical for real-time deterministic systems.