Infineon Technologies S27KL0642GABHI033

Overview

S27KL0642GABHI033 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 in embedded microcontroller systems requiring low-pin-count, high-bandwidth external memory without host-managed refresh.

For engineers reviewing the S27KL0642GABHI033 datasheet, S27KL0642GABHI033 pinout, S27KL0642GABHI033 application, or S27KL0642GABHI033 equivalent, key selection considerations include HYPERBUS™ timing compliance, RWDS phase alignment for read eye margin, burst configuration register settings, voltage mode (1.8 V vs. 3.0 V), and thermal grade (Industrial I vs. Automotive AEC-Q100 Grade 3).

Technical Context

This device implements a self-refresh DRAM core with integrated refresh control logic, eliminating host-side refresh management. Its HYPERBUS™ interface uses only 11–12 signals (including optional CK#) and multiplexes command/address/data over DQ[7:0], enabling high bandwidth with minimal PCB routing.

The RWDS signal serves dual roles: outputting initial latency indication at transaction start and acting as read data strobe or write mask during transfers. Optional DCARS mode shifts RWDS phase by one-half clock cycle to center-align transitions within the read data eye, improving timing 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 S27KS0642GABHI033, this part offers identical functionality under Infineon branding; versus S27KL0642GABHI020, it trades extended temperature range for lower cost and qualification scope - critical for industrial HMI where 85°C ambient suffices.

Availability

S27KL0642GABHI033 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMI panels, edge AI sensor gateways, and medical portable monitors requiring stable component supply across multi-year production cycles.

Supply support for S27KL0642GABHI033 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, sensing, connectivity, and memory solutions for automotive, industrial, and IoT markets.

This device belongs to the HYPERRAM™ family, designed specifically to replace parallel NOR/NAND flash in MCU-based systems needing fast, low-pin-count external memory with SRAM-like ease of use and DRAM-level density.

FAQ

What is the purpose of the RWDS signal in S27KL0642GABHI033?

RWDS is a bidirectional strobe used to indicate initial access latency at transaction start and to synchronize read/write data transfers. During reads, it acts as a data-valid strobe aligned to DQ; during writes, it serves as a byte-mask signal. Its phase can be shifted via DCARS mode to improve timing margin at high clock rates.

Does S27KL0642GABHI033 require external refresh control from the host MCU?

No. The device contains on-die self-refresh logic that automatically manages DRAM array refresh without host intervention. The host sees it as a pseudo-static RAM - no refresh commands or timing constraints beyond standard HYPERBUS™ transaction rules are required.

Can S27KL0642GABHI033 operate with single-ended clock only?

Yes. The device supports single-ended CK input (11-signal mode) as well as optional differential CK/CK# (12-signal mode). Differential clock is required only when using DCARS functionality or when system-level jitter demands improved timing robustness at 200 MHz.

What is the significance of the '033' suffix in the part number?

The '033' denotes the industrial temperature grade (−40°C to +85°C) and standard reliability screening. It distinguishes this variant from automotive versions like '020' (AEC-Q100 Grade 2) and '022' (AEC-Q100 Grade 3), ensuring appropriate qualification for non-automotive embedded applications.