Infineon Technologies S70KL1281DABHI023

Overview

S70KL1281DABHI023 from Infineon Technologies (formerly Cypress) is a 128 Mb (16 MB) HyperRAM™ self-refresh DRAM with HyperBus interface, functioning as a pseudo-static memory in embedded systems requiring high bandwidth and low pin count. It supports 1.8 V I/O, differential clock (CK/CK#), 8-bit DQ bus, bidirectional RWDS strobe/mask, and delivers up to 333 MBps at 166 MHz DDR operation.

For engineers reviewing the S70KL1281DABHI023 datasheet, S70KL1281DABHI023 pinout, S70KL1281DABHI023 application, or S70KL1281DABHI023 equivalent, key selection criteria include DDR timing compliance, DCARS read strobe phase alignment, deep power-down current (20 µA @ 1.8 V), configurable burst length (16–128 bytes), and FBGA-24 package compatibility with HyperBus host controllers.

Technical Context

This device implements a dual-die stacked architecture-two 64 Mb HyperRAM dies in one FBGA-24 package-enabling 128 Mb density while retaining identical HyperBus protocol, command set, and timing behavior as single-die variants. It uses internal refresh logic to eliminate host-managed refresh cycles, presenting a PSRAM-like interface.

The HyperBus interface operates with center-aligned DDR transfers on DQ[7:0], where RWDS serves dual roles: outputting initial latency indication during CA transfer, then acting as edge-aligned read data strobe or write mask signal. DCARS functionality shifts RWDS phase relative to CK to center it within the read data eye at 166 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 pseudo-static memory applications.

Compared with S70KL1281DABHI023, the S70KL1281DABHI020 trades automotive qualification for cost-sensitive industrial use, while the S70KS1281DABHI023 sacrifices high-speed DCARS capability and 1.8 V compatibility for simpler single-ended clocking-neither is drop-in replaceable without hardware or firmware revision.

Availability

S70KL1281DABHI023 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMIs, edge AI accelerators, and medical imaging front-ends requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.

Supply support for S70KL1281DABHI023 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensing, connectivity, and memory solutions for automotive, industrial, and IoT markets.

This part belongs to the HyperRAM™ product line, designed specifically to bridge the performance, density, and cost gap between PSRAM and mobile DDR in resource-constrained embedded systems with strict pin-count and power budgets.

FAQ

Is S70KL1281DABHI023 pin-compatible with S27KL0641 or S70KL0641?

No. S70KL1281DABHI023 is a 128 Mb dual-die device in 24-ball FBGA, whereas S27KL0641/S70KL0641 are 64 Mb single-die parts. Though both share HyperBus interface and identical pin functions, the 128 Mb variant requires no additional signals but is not physically interchangeable due to different internal die stacking and timing calibration requirements.

Does this device require external refresh control from the host processor?

No. S70KL1281DABHI023 contains fully autonomous self-refresh circuitry. The host processor accesses it as a pseudo-static RAM-no refresh commands, timers, or scheduling logic are needed. Internal refresh occurs transparently during idle cycles or added latency windows indicated by RWDS.

What is the significance of RWDS being bidirectional and its role in DCARS?

RWDS acts as an output during command/address transfer to signal whether extra latency is needed, then switches to edge-aligned read strobe or write mask. In DCARS mode, its rising/falling edges are phase-shifted relative to CK to land precisely in the center of the read data eye-this compensates for skew and enables reliable 166 MHz DDR sampling without complex board-level delay tuning.

Can S70KL1281DABHI023 operate with a single-ended clock instead of differential CK/CK#?

No. This specific variant (DABHI023) mandates differential CK/CK# for 1.8 V operation and DCARS functionality. Attempting single-ended clocking violates AC timing specifications and disables RWDS phase-shifting, resulting in read data capture failure at rated speeds. Use S70KS1281 for single-ended clock support.