Infineon Technologies S27KL0643GABHV023

Overview

S27KL0643GABHV023 from Infineon is a 64Mb self-refresh DRAM (PSRAM) with octal xSPI interface, 1.8 V/3.0 V dual-supply support, 200 MHz DDR clock, and 24-ball FBGA package. It delivers up to 400 MBps throughput, supports linear/wrapped burst lengths (16–128 bytes), and operates across industrial temperature range (–40°C to +105°C). Used in embedded microcontroller systems requiring high-bandwidth, low-pin-count external memory with SRAM-like ease of use.

For engineers reviewing the S27KL0643GABHV023 datasheet, S27KL0643GABHV023 pinout, S27KL0643GABHV023 application, or S27KL0643GABHV023 equivalent, key selection criteria include xSPI octal DDR timing compliance, RWDS strobe behavior, configurable burst mode, hybrid sleep/deep power down current specs (12 µA at 1.8 V), and AEC-Q100 Grade 2 qualification for automotive edge computing.

Technical Context

This PSRAM integrates DRAM array refresh control logic that autonomously manages partial/full array refresh without host intervention-enabling SRAM-like command interface over xSPI. Its octal DDR interface uses CK/RWDS synchronization with optional differential CK# and DCARS phase-shifted read strobe for timing margin optimization in high-speed layouts.

The device implements 16-bit command encoding (dual 8-bit opcodes on each CK edge), supports register-based configuration of drive strength, burst type, and power modes, and enforces transaction-level access latency when internal refresh is pending-requiring host firmware to respect tACC (35 ns) and initial read latency indicators via RWDS.

Key Specifications

Pinout & Package

24-ball FBGA (5 mm × 5 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3. Package footprint matches JEDEC MO-270AC standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S27KS0643GABHV020, this part offers identical functionality with updated Infineon branding and lifecycle support; versus IS66WV12816EBLL-100B3LI, it trades pin count and static guarantee for xSPI integration, bandwidth, and power efficiency in modern embedded SoCs.

Availability

S27KL0643GABHV023 is available at Aetrix Electronics and suitable for automotive ADAS camera buffers, industrial HMI frame buffers, and edge AI inference scratchpads requiring stable component supply, AEC-Q100 qualification, and long-term industrial temperature operation.

Supply support for S27KL0643GABHV023 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.

S27KL0643GABHV023 belongs to the HYPERRAM™ PSRAM product line, designed specifically to replace parallel SRAM and low-density DDR in resource-constrained embedded systems needing high bandwidth, low pin count, and simplified memory subsystem design.

FAQ

Does S27KL0643GABHV023 require external refresh circuitry?

No. The device contains integrated self-refresh logic that autonomously manages DRAM array refresh during idle periods. Host controllers interact with it using standard xSPI commands and do not need to issue refresh cycles or track refresh timing-making it functionally equivalent to SRAM in software interface.

What is the purpose of the RWDS signal beyond data strobing?

RWDS serves three roles: (1) indicates read data validity during reads, (2) acts as write mask during writes, and (3) pulses at the start of every transaction to signal pending internal refresh latency-requiring the host to insert additional wait states before accessing data.

Can S27KL0643GABHV023 operate at 1.8 V and 3.0 V simultaneously?

No. VCC (core) and VCCQ (I/O) must be supplied at the same nominal voltage: either both at 1.8 V or both at 3.0 V. Mixed-supply operation is not supported and violates absolute maximum ratings per the datasheet.

Is DCARS functionality enabled by default?

DCARS is disabled by default. It must be activated by setting bit 7 of Configuration Register 2 (CR2) via WRITE ANY REGISTER command. Once enabled, RWDS transitions align to the phase-shifted clock edge during reads, improving setup/hold margins in high-speed layouts.