Infineon Technologies S27KL0642DPBHA023

Overview

S27KL0642DPBHA023 from Infineon 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, delivering 400 MBps throughput, and housed in a 24-ball FBGA package for industrial temperature range (–40°C to +85°C). It serves as high-bandwidth, low-pin-count external memory for microcontrollers in embedded HMI and automotive infotainment systems.

For engineers reviewing the S27KL0642DPBHA023 datasheet, S27KL0642DPBHA023 pinout, S27KL0642DPBHA023 application, or S27KL0642DPBHA023 equivalent, key selection factors include HYPERBUS™ timing compliance, RWDS bidirectional strobe behavior, configurable burst lengths (16–128 bytes), partial array refresh support, and DCARS phase-shifted read strobe capability.

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#), with command/address/data multiplexed over DQ[7:0] and RWDS serving dual roles: initial latency indicator and dynamic read/write strobe/mask.

The device implements DDR data transfers synchronized to CK/CK#, supports linear and wrapped burst modes, and includes DCARS functionality-where RWDS is phase-shifted relative to CK during reads to center transitions within the data eye-enabling reliable high-speed sampling at 200 MHz.

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 S27KL0642DPBHA023, both alternatives share identical architecture, timing, and power behavior - the differences are purely administrative (OPN suffix, branding, distribution channel), making them drop-in replacements with no design revalidation required.

Availability

S27KL0642DPBHA023 is available at Aetrix Electronics and suitable for automotive cluster displays, industrial HMI panels, edge AI sensor hubs, and medical diagnostic displays requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for S27KL0642DPBHA023 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.

S27KL0642DPBHA023 belongs to the HYPERRAM™ family - designed specifically to replace parallel NOR/NAND flash and legacy PSRAM in bandwidth-constrained embedded systems needing simple, high-speed, low-pin-count external memory.

FAQ

What is the function of the RWDS pin in S27KL0642DPBHA023?

RWDS is a bidirectional signal that serves three critical functions: (1) it pulses at the start of each transaction to indicate initial access latency due to internal refresh; (2) during reads, it acts as a center-aligned data strobe synchronized to CK; (3) during writes, it functions as a byte-enable mask. Its behavior is configurable via register settings and supports DCARS phase shifting for timing margin optimization.

Does S27KL0642DPBHA023 require external refresh control from the host MCU?

No. The device contains integrated self-refresh logic that autonomously manages DRAM array refresh cycles without host intervention. The host sees static RAM-like behavior - no refresh commands or timing windows are required. However, the host must respect initial latency indications signaled via RWDS and limit burst duration to allow internal refresh completion.

Can S27KL0642DPBHA023 operate with single-ended clock only?

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 specifications in the official Infineon datasheet (Rev. *I) are guaranteed for both configurations, with identical maximum 200 MHz operation.

What is the significance of the "PBH" suffix in S27KL0642DPBHA023?

The "PBH" segment encodes package and temperature grade: "P" = 24-ball FBGA, "B" = industrial temperature range (–40°C to +85°C), "H" = lead-free, halogen-free, RoHS-compliant packaging. The full suffix "PBHA023" indicates tape-and-reel packaging, standard moisture sensitivity level (MSL3), and Infineon's internal revision and lot tracking.