Infineon Technologies S27KS0643GABHA020

Overview

S27KS0643GABHA020 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 via 8-bit DQ bus and RWDS strobe, features configurable burst lengths (16–128 bytes), partial/full array refresh, and operates across industrial (−40°C to +85°C) and automotive AEC-Q100 grade 2 (−40°C to +105°C) temperature ranges.

For engineers reviewing the S27KS0643GABHA020 datasheet, S27KS0643GABHA020 pinout, S27KS0643GABHA020 application, or S27KS0643GABHA020 equivalent, key selection criteria include xSPI octal timing compliance, RWDS phase alignment for read eye margin, hybrid sleep/deep power down current specs (12 µA at 2.0 V), and FBGA-24 package compatibility with high-density MCU memory expansion.

Technical Context

This PSRAM integrates on-die refresh control logic that autonomously manages DRAM array refresh without host intervention, presenting static RAM behavior to the controller. Its xSPI octal interface uses DDR signaling on DQ[7:0] and RWDS, with all transfers synchronized to CK (or CK/CK# differential pair), requiring CS# assertion per transaction and 16-bit command framing.

The device supports DCARS mode where RWDS is phase-shifted relative to CK to center-align the strobe edge within the read data eye-critical for timing margin in high-speed linear bursts. Burst configuration (wrapped/linear/hybrid), output drive strength, and partial refresh granularity (1/8 to full array) are register-programmable via xSPI commands.

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 S27KL0643GABHI020, the S27KS0643GABHA020 adds AEC-Q100 Grade 2 support and extended temperature range; versus W958D8MBYA1I, it delivers 50% higher bandwidth, autonomous refresh, and advanced strobe alignment-justifying use in next-gen automotive and edge AI systems.

Availability

S27KS0643GABHA020 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMIs, edge AI vision preprocessing, and portable medical monitors requiring stable component supply across extended temperature and long lifecycle programs.

Supply support for S27KS0643GABHA020 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-bandwidth, low-pin-count memory expansion for resource-constrained MCUs and SoCs-designed specifically to replace parallel SRAM and reduce PCB layer count in automotive, industrial, and IoT edge applications.

FAQ

Does S27KS0643GABHA020 require external refresh circuitry?

No. The device contains integrated self-refresh logic that autonomously manages DRAM array refresh during idle periods. Host processors interact with it as if it were static RAM-no refresh commands, timers, or scheduling are needed. Refresh occurs transparently between transactions, triggered by internal counters and configurable partial-array settings.

What is the purpose of the RWDS signal in DCARS mode?

In DCARS mode, RWDS is phase-shifted by ½ clock cycle relative to CK to center its transition edge within the read data eye. This compensates for skew between CK and DQ propagation delays, increasing timing margin for reliable sampling at 200 MHz DDR-especially critical in thermally stressed automotive environments.

Can S27KS0643GABHA020 operate with both 1.8 V and 3.0 V I/O supplies simultaneously?

No. VCC and VCCQ are internally tied; the device is manufactured in discrete voltage variants. S27KS0643GABHA020 is specified for 1.8 V nominal supply (VCC/VCCQ = 1.7–1.95 V). A separate 3.0 V variant exists (S27KS0643GABHA030), but mixing supplies or operating outside the rated range risks functional failure or latch-up.

How does hybrid sleep mode differ from deep power down?

Hybrid sleep retains memory contents and register state with ~330 µA current draw and sub-100 ns wake-up latency, allowing immediate resume of transactions. Deep power down reduces current to 12 µA but requires full reinitialization-including xSPI configuration and mode register setup-adding ~100 µs delay before first valid access.