Infineon Technologies S27KL0642DPBHI033

Overview

S27KL0642DPBHI033 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 delivering up to 400 MBps data throughput in linear burst mode; it features bidirectional RWDS strobe, configurable burst lengths (16–128 bytes), and industrial temperature range (–40°C to +85°C); used as high-bandwidth, low-pin-count external memory for microcontroller-based embedded systems requiring seamless SRAM-like interface.

For engineers reviewing the S27KL0642DPBHI033 datasheet, S27KL0642DPBHI033 pinout, S27KL0642DPBHI033 application, or S27KL0642DPBHI033 equivalent, key selection criteria include HYPERBUS™ timing compliance, RWDS phase alignment support, partial array refresh configuration, DCARS capability, and FBGA-24 thermal/mechanical fit in space-constrained PCB layouts.

Technical Context

This PSRAM integrates DRAM array with on-die refresh controller and HYPERBUS™ physical layer logic, eliminating host-managed refresh while maintaining DDR efficiency. It uses LV-CMOS signaling on all I/Os, supports both single-ended (11-signal) and differential clock (12-signal) configurations, and relies on RWDS edge alignment-center-aligned during reads and input-masked during writes-to manage timing margins across voltage/temperature corners.

The device implements hybrid sleep and deep power-down modes with sub-15 µA current draw at 105°C, and supports configurable output drive strength and wrapped/linear burst modes. Its 38-nm process enables 35 ns maximum access time at 1.8 V, with initial latency dynamically indicated via RWDS assertion at transaction start.

Key Specifications

Pinout & Package

Package: 24-ball FBGA (5 mm × 5 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S27KL0642DPBHI033, the Cypress variant offers drop-in compatibility and identical performance, while the ISSI SRAM trades interface simplicity and power efficiency for absolute timing predictability and wider voltage tolerance - making it viable only in non-battery, non-space-constrained legacy designs.

Availability

S27KL0642DPBHI033 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMI panels, and edge AI sensor nodes requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle assurance.

Supply support for S27KL0642DPBHI033 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.

This device belongs to the HYPERRAM™ product line, designed specifically to replace parallel NOR/NAND and legacy SRAM in MCU-based systems where high bandwidth, low pin count, and embedded-friendly refresh behavior are critical.

FAQ

What is the function of the RWDS signal in S27KL0642DPBHI033?

RWDS is a bidirectional strobe: during reads, it outputs a pulse indicating initial access latency and then serves as read data strobe aligned to data edges; during writes, it acts as input mask signal to suppress invalid data transitions. Its timing is critical for setup/hold compliance and is configurable for DCARS offset in high-speed layouts.

Does S27KL0642DPBHI033 require external refresh management?

No. The device contains on-die self-refresh logic that automatically schedules DRAM array refresh during idle periods. The host only needs to observe initial latency indications via RWDS and limit burst durations per datasheet guidelines - no refresh commands or timing control are required from the MCU.

Can S27KL0642DPBHI033 operate with only single-ended clock (CK) instead of differential (CK/CK#)?

Yes. The device supports both configurations: 11-signal mode (CK only) and 12-signal mode (CK/CK#). Differential clock is required only when enabling DCARS functionality; otherwise, single-ended CK meets all timing specifications up to 200 MHz with proper PCB layout and termination.

What is the significance of the "PBH" suffix in S27KL0642DPBHI033?

The "PBH" denotes the 24-ball FBGA package (5×5 mm), industrial temperature grade (–40°C to +85°C), and lead-free/RoHS-compliant construction. The "I033" suffix specifies tape-and-reel packaging, 13-inch reel, and standard moisture sensitivity level (MSL3), per Infineon's ordering nomenclature.