Infineon Technologies CYK512K16SCAU-70BAXI

Overview

CYK512K16SCAU-70BAXI from Cypress Semiconductor is a 8-Mbit pseudo-static RAM (PSRAM) organized as 512K × 16, supporting asynchronous memory interface with 70 ns read cycle time, 2.7–3.3 V supply, and MoBL® low-power architecture. It delivers 11 mA typical active current at f_MAX, 55 µA typical standby current (ISB2), and operates across −25°C to +85°C for industrial portable systems including cellular handsets and battery-powered embedded controllers.

For engineers reviewing the CYK512K16SCAU-70BAXI datasheet, CYK512K16SCAU-70BAXI pinout, CYK512K16SCAU-70BAXI application, or CYK512K16SCAU-70BAXI equivalent, key selection criteria include byte-selectable I/O (BHE/ BLE), automatic CE-controlled power-down, high-impedance tri-state outputs during deselect/OE deassertion/write, and FBGA-48 package compatibility with space-constrained PCB layouts.

Technical Context

The CYK512K16SCAU-70BAXI implements a CMOS-based PSRAM architecture with dual chip enables (CE1/CE2), independent byte enables (BHE/BLE), and OE/WE control to support flexible read/write timing modes - including address-controlled, OE-controlled, and WE-controlled cycles. Its internal power-down circuit activates when CE1 is HIGH and CE2 is LOW (or both BHE/BLE are HIGH), reducing ICC to ISB2 levels without external logic.

It features true asynchronous operation: data appears on I/O0–I/O7 when BLE = LOW and on I/O8–I/O15 when BHE = LOW; all I/Os enter high-Z state during deselect, OE HIGH, or write (WE LOW). Timing parameters such as tACE (70 ns), tDOE (35 ns), and tHZOE (25 ns) are specified under 30-pF load and 1 V/ns edge rates per JEDEC-compliant AC test conditions.

Key Specifications

Pinout & Package

Package: 48-ball Fine-Pitch Ball Grid Array (FBGA), 6.0 mm × 8.0 mm × 1.2 mm body, Pb-free, industrial temperature grade.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pseudo-static RAM applications.

Compared with IS61WV51216BLL-70TLI and W9825G6JH-75, CYK512K16SCAU-70BAXI offers lowest standby power and drop-in asynchronous replacement for legacy SRAM designs - avoiding controller changes while delivering 45% lower ISB than ISSI and full compatibility with existing CE/OE/WE logic.

Availability

CYK512K16SCAU-70BAXI is available at Aetrix Electronics and suitable for cellular handset baseband memory, portable medical monitor buffers, and industrial HMI display frame buffers requiring stable component supply, Pb-free compliance, and industrial temperature assurance.

Supply support for CYK512K16SCAU-70BAXI 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

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and programmable solutions for embedded systems, emphasizing low-power innovation and automotive-grade quality.

The MoBL® PSRAM product line targets battery-sensitive portable electronics, delivering SRAM-like simplicity with DRAM-level density - specifically engineered for cellular, medical, and industrial applications needing extended runtime and compact packaging.

FAQ

Can CYK512K16SCAU-70BAXI operate reliably at 2.7 V with 70 ns timing?

Yes. The datasheet guarantees tRC ≤ 70 ns and full functionality across the entire 2.7–3.3 V range at −25°C to +85°C. At 2.7 V, ICC drops to ~9 mA at f_MAX, and all AC parameters meet specification with proper 30-pF load and 1 V/ns edge rates. No derating is required for timing or voltage.

What happens to I/O pins during power-up or brownout?

During power-up, I/Os remain in high-impedance state until VCC exceeds 1.5 V and stabilization completes (~100 µs). During brownout below 2.5 V, the device enters automatic power-down (ISB2 mode) and forces I/Os high-Z - preventing bus contention or undefined logic states on shared data lines.

Is the 48-ball FBGA footprint compatible with CYK512K16SCCAU-55BAXI?

Yes. Both share identical BA48K package: 48-ball FBGA, 6.0 × 8.0 × 1.2 mm, 0.5 mm pitch, and identical ball map per datasheet Figure 1. The only difference is AC timing (55 ns vs. 70 ns); no PCB redesign is needed for speed-grade substitution.

How does automatic power-down differ between ISB1 and ISB2 modes?

ISB1 (400 µA max) activates when CE1 > VCC–0.2 V and CE2 < 0.2 V with address/data toggling; ISB2 (100 µA max) activates under same CE conditions but with all control inputs static (OE, WE, BHE, BLE held steady). ISB2 is the deeper, lower-power state used during true system sleep.