Infineon Technologies S27KS0643GABHV023

Overview

S27KS0643GABHV023 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 and deep power-down modes, and operates across -40°C to +105°C (Industrial Plus grade). Used in embedded microcontroller systems requiring low-latency, high-bandwidth external memory without host-managed refresh.

For engineers reviewing the S27KS0643GABHV023 datasheet, S27KS0643GABHV023 pinout, S27KS0643GABHV023 application, or S27KS0643GABHV023 equivalent, key selection criteria include xSPI octal timing compliance, RWDS strobe behavior, DCARS phase-shift support, partial array refresh configuration, and FBGA-24 thermal/power envelope suitability for space-constrained MCU co-processors.

Technical Context

This PSRAM integrates DRAM array logic with on-die refresh control and xSPI protocol engine, eliminating host-side refresh management. Its octal DDR interface uses CK/RWDS synchronization with optional differential CK# and DCARS for read-data eye centering - enabling reliable 200 MHz operation with 35 ns tACC.

The device implements command-based transactions (16-bit opcodes), supports linear/wrapped/hybrid bursts, and manages power states via CS#, RESET#, and register-controlled modes including Deep Power Down (12 µA at 2.0 V) and Hybrid Sleep. Memory density is organized as 8M × 8, with row/column addressing over xSPI bus.

Key Specifications

Pinout & Package

Package: 24-ball FBGA, 5 mm × 5 mm, 0.8 mm pitch, RoHS-compliant, optimized for thermal dissipation and high-density layout in compact modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S27KS0643GABHV023, the Cypress alternative trades thermal range and DCARS for cost, while the Winbond part requires firmware rework and delivers 17% lower bandwidth - making the Infineon device optimal for new designs demanding 200 MHz stability and extended temperature operation.

Availability

S27KS0643GABHV023 is available at Aetrix Electronics and suitable for industrial HMIs, automotive ADAS ECUs, IoT edge gateways, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S27KS0643GABHV023 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 leader specializing in power management, sensor, and memory solutions for industrial, automotive, and IoT markets.

The HYPERRAM™ product line delivers high-bandwidth, low-pin-count PSRAMs targeting MCU-based systems needing external memory without refresh complexity or parallel bus overhead.

FAQ

Does S27KS0643GABHV023 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 a static memory - 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 function of the RWDS pin during write operations?

During write transactions, RWDS serves as a write data mask (WDM) input. Each rising edge samples one byte of DQ[7:0], enabling selective byte-level writes without read-modify-write cycles. This allows precise memory updates - critical for register-mapped peripherals or fragmented firmware patching - while maintaining full DDR bandwidth efficiency.

Can S27KS0643GABHV023 operate with only single-ended CK (no CK#)?

Yes. The device supports both single-ended (CK only) and differential (CK/CK#) clocking. When CK# is unused, it must be tied to VSS or VCC per datasheet guidance. Single-ended mode simplifies layout but sacrifices some jitter immunity; differential mode is recommended for 200 MHz operation in electrically noisy environments like motor drives or automotive chassis.

How does DCARS improve timing margin in read operations?

DCARS shifts the RWDS output edge by one CK period relative to CK, positioning the strobe transition near the center of the read data eye instead of its edge. This increases setup/hold margin by up to 1.5 ns at 200 MHz - directly enabling reliable operation on FR-4 PCBs with moderate trace skew and signal integrity challenges typical in cost-sensitive industrial designs.