Infineon Technologies S27KS0643GABHI020

Overview

S27KS0643GABHI020 from Infineon is a 64Mb self-refresh DRAM (PSRAM) with octal xSPI interface, supporting 1.8 V/3.0 V I/O and 200 MHz DDR clocking. It delivers up to 400 MBps throughput, features configurable burst lengths (16–128 bytes), hybrid sleep/deep power-down modes, and operates across -40°C to +85°C (Industrial grade). Used in embedded microcontroller systems requiring high-bandwidth, low-pin-count external memory with no host-managed refresh.

For engineers reviewing the S27KS0643GABHI020 datasheet, S27KS0643GABHI020 pinout, S27KS0643GABHI020 application, or S27KS0643GABHI020 equivalent, this page provides verified technical context, validated pin functions, real-world use scenarios, and confirmed alternative parts for HYPERRAM™-based memory subsystems.

Technical Context

The S27KS0643GABHI020 implements an octal xSPI interface with DDR signaling on DQ[7:0] and RWDS, using CK (single-ended) or optional CK/CK# (differential) for timing. All transactions begin with CS# assertion and include a 16-bit command encoded as dual 8-bit opcodes transmitted on both clock edges.

Internal refresh logic autonomously manages DRAM array refresh without host intervention, enabling PSRAM-like operation. RWDS serves dual roles: as read data strobe (center-aligned with DCARS option) and write data mask, while partial array refresh (1/8, 1/4, 1/2) reduces power during idle periods.

Key Specifications

Pinout & Package

24-ball FBGA (5 mm × 5 mm, 0.8 mm pitch), RoHS-compliant, with 0.5 mm ball diameter. Package meets JEDEC MO-315 standard and supports automated optical inspection (AOI) and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S27KL0643GABHI020 (identical) and IS66WV1288GBLL-150B3LI (parallel SRAM), the S27KS0643GABHI020 uniquely delivers DDR xSPI bandwidth with self-refresh in a 24-ball FBGA - optimizing for pin-constrained, low-power, and software-simple embedded memory expansion.

Availability

S27KS0643GABHI020 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMI panels, edge AI sensor nodes, and medical portable monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S27KS0643GABHI020 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.

The HYPERRAM™ product line targets high-performance, low-pin-count external memory for resource-constrained MCUs and SoCs - designed to replace parallel PSRAM and reduce system-level complexity in cost-sensitive, space-limited applications.

FAQ

Does S27KS0643GABHI020 require external refresh commands from the host MCU?

No. The device contains autonomous self-refresh logic that manages DRAM array refresh without host intervention. The host sees it as a static RAM - no refresh registers, timers, or periodic commands are needed. Refresh occurs transparently during idle cycles or via partial array modes triggered by internal state.

What is the purpose of the RWDS pin, and how does DCARS affect its behavior?

RWDS is bidirectional: it outputs as a read data strobe and inputs as a write data mask. With DCARS enabled, RWDS is phase-shifted by 90° relative to CK during reads, centering its transition within the data eye to improve timing margin at 200 MHz DDR rates - especially critical on lossy PCB traces.

Can S27KS0643GABHI020 operate with only single-ended clock (CK), or is differential (CK/CK#) mandatory?

Single-ended CK is fully supported and sufficient for most applications. CK# is optional and only required when using DCARS mode or when board-level noise immunity demands differential signaling. The device automatically detects CK# presence and configures accordingly during initialization.

How does Hybrid Sleep mode differ from Deep Power Down in terms of wake latency and data retention?

Hybrid Sleep retains full memory contents with <1 µs wake latency and ~330 µA standby current at 2.0 V, making it ideal for interrupt-driven real-time tasks. Deep Power Down reduces current to 12 µA but requires >100 µs wake time and full reinitialization - best suited for extended idle periods between operational bursts.