Infineon Technologies S27KL0642DPBHV023

Overview

S27KL0642DPBHV023 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 and delivering up to 400 MBps throughput. It features bidirectional RWDS strobe, configurable burst lengths (16–128 bytes), partial/full array refresh, and 24-ball FBGA packaging for industrial-plus (−40°C to +105°C) applications in microcontroller-based embedded systems requiring low-pin-count high-bandwidth memory.

For engineers reviewing the S27KL0642DPBHV023 datasheet, S27KL0642DPBHV023 pinout, S27KL0642DPBHV023 application, or S27KL0642DPBHV023 equivalent, key selection criteria include HYPERBUS™ timing compliance, RWDS phase alignment support, DCARS capability, burst configuration flexibility, and deep power-down current (12 µA at 2.0 V).

Technical Context

This PSRAM integrates on-die refresh control logic that autonomously manages DRAM array refresh without host intervention, presenting static RAM-like behavior to the controller. Its HYPERBUS™ interface uses only 11–12 signals (including optional CK#) and multiplexes command/address/data over an 8-bit DQ bus with center-aligned CA transfers and edge-aligned data.

The RWDS signal serves dual roles: as a read-data strobe (phase-shifted for DCARS) during reads and as a write-data mask during writes; its timing directly governs initial access latency and read-data eye positioning. The device supports both linear and wrapped burst modes, with hybrid burst options enabling efficient sequential and wrap-around access patterns.

Key Specifications

Pinout & Package

24-ball Fine-Pitch Ball Grid Array (FBGA) package with 5 × 5 array, 0.8 mm ball pitch, and standard JEDEC MO-270AB footprint. Pin assignments conform to Infineon's HYPERBUS™ layout for signal integrity and thermal performance in industrial-plus environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S27KL0642DPBHV020 and S27KS0642DPBHV020, the S27KL0642DPBHV023 offers identical functionality and timing but includes enhanced traceability for OEM production programs and tighter RWDS phase jitter control-critical for marginal PCB layouts operating at maximum frequency.

Availability

S27KL0642DPBHV023 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMI panels, edge AI sensor nodes, and medical portable monitors requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for S27KL0642DPBHV023 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, and memory solutions for automotive, industrial, and IoT applications.

The HYPERRAM™ product line delivers high-bandwidth, low-pin-count PSRAM optimized for MCU-based systems needing more memory than on-chip SRAM but less complexity than SDRAM controllers.

FAQ

What is the difference between S27KL0642DPBHV023 and S27KS0642DPBHV020?

Both share identical silicon, electrical specifications, timing, and pinout. The distinction lies solely in Infineon's internal part numbering scheme: 'KL' denotes the standard HYPERRAM™ family, while 'KS' indicates a variant with identical function but different wafer lot traceability and packaging documentation. No design or performance differences exist between them.

Does S27KL0642DPBHV023 require external refresh circuitry?

No. This device integrates autonomous self-refresh logic that manages DRAM array refresh internally. The host processor interacts with it as if it were static RAM-no refresh commands, timers, or scheduling are needed. Refresh occurs transparently during idle periods or within configurable latency windows.

Can S27KL0642DPBHV023 operate with only single-ended clock (CK) without CK#?

Yes. The device supports both single-ended (CK only) and differential (CK/CK#) clock configurations. When using single-ended mode, CK# must be tied to VSS or VCC per datasheet guidance. All timing parameters-including tACC (35 ns) and setup/hold margins-are guaranteed under single-ended operation at 200 MHz.

What is the purpose of the RWDS signal beyond indicating refresh latency?

RWDS serves three critical functions: (1) signals initial access latency before read data begins, (2) acts as a read-data strobe aligned to the center of the data eye (especially with DCARS enabled), and (3) functions as a write-data mask during burst writes-allowing selective byte updating without read-modify-write cycles.