Infineon Technologies S27KL0643GABHB023

Overview

S27KL0643GABHB023 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 industrial temperature range (−40°C to +85°C) in 24-ball FBGA package - used for high-bandwidth, low-latency memory expansion in microcontroller-based edge AI inference accelerators.

For engineers reviewing the S27KL0643GABHB023 datasheet, S27KL0643GABHB023 pinout, S27KL0643GABHB023 application, or S27KL0643GABHB023 equivalent, key selection criteria include xSPI octal DDR timing compliance, RWDS strobe behavior during read/write, partial array refresh configuration, DCARS phase-shifted strobe support, and AEC-Q100 grade 3 qualification for automotive infotainment head units.

Technical Context

This PSRAM integrates DRAM array with on-die refresh controller and xSPI protocol engine, eliminating host-managed refresh. Its octal DDR interface uses CK/CK# differential clock option (12-signal mode) or single-ended CK (11-signal mode), with RWDS serving dual role: output as read data strobe (phase-shifted via DCARS) and input as write mask.

Memory access requires command-driven transactions (16-bit opcode), with linear or wrapped burst support and hybrid burst mode (wrapped + linear). Internal logic enforces refresh latency indication at transaction start, requiring host to honor variable initial access delay (tACC = 35 ns max) before valid data transfer.

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 S27KS0643GABHB020, this part adds AEC-Q100 grade 3 validation for automotive use; versus IS66WV12816EBLL-100B1LI, it trades pin count and deterministic latency for 2.5× lower power and 4× higher bandwidth in half the footprint.

Availability

S27KL0643GABHB023 is available at Aetrix Electronics and suitable for automotive digital clusters, industrial HMI gateways, AI edge inference accelerators, and smart camera video preprocessing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S27KL0643GABHB023 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, sensing, connectivity, and memory solutions for automotive, industrial, and IoT markets.

The HYPERRAM™ product line delivers high-speed, low-pin-count PSRAMs optimized for microcontroller-based systems needing DRAM density with SRAM-like ease of use and xSPI compatibility.

FAQ

Does S27KL0643GABHB023 require external refresh circuitry?

No. The device contains integrated self-refresh logic that autonomously manages DRAM array refresh during idle periods. Host controllers need not issue refresh commands or track refresh intervals - the memory appears as static RAM to software, though burst length limits and initial access latency must be observed per datasheet Section 1.

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

During reads, RWDS outputs a center-aligned strobe synchronized to data eye center (enhanced by DCARS). During writes, RWDS functions as an input mask signal - each bit enables or disables corresponding DQ[7:0] lane, allowing partial-byte writes without read-modify-write cycles.

Can S27KL0643GABHB023 operate with single-ended clock only?

Yes. The device supports both single-ended (CK only, 11-signal interface) and differential (CK/CK#, 12-signal interface) clocking. CK# is optional; when unused, CK operates in single-ended mode with standard LV-CMOS thresholds and timing specifications defined in Table 10-3 of the datasheet.

How does Deep Power Down mode affect data retention?

In Deep Power Down mode (activated via xSPI command), the device retains all stored data while drawing only 12 µA at 2.0 V. Exit time is 100 µs maximum; no reinitialization is required - the device resumes normal operation after CS# deassertion and clock stabilization, preserving full memory contents.