Infineon Technologies CYK512K16SCAU-70BAXIT

Overview

CYK512K16SCAU-70BAXIT 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 applications including cellular handsets and battery-powered embedded controllers.

For engineers reviewing the CYK512K16SCAU-70BAXIT datasheet, CYK512K16SCAU-70BAXIT pinout, CYK512K16SCAU-70BAXIT application, or CYK512K16SCAU-70BAXIT equivalent, key selection criteria include byte-enable-controlled I/O partitioning (BHE/BLE), automatic CE-based power-down, high-impedance tri-state control on OE/CE/WE transitions, and FBGA-48 package compatibility with space-constrained PCB layouts.

Technical Context

The CYK512K16SCAU-70BAXIT implements a CMOS PSRAM core with dual chip enable (CE1/CE2) logic enabling precise power gating: standby mode activates when CE1 is HIGH and CE2 is LOW, or both BHE and BLE are HIGH. Its asynchronous interface requires no clock, relying on address-valid timing (tAA = 70 ns) and CE-controlled access (tACE = 70 ns) for deterministic latency.

It supports independent upper- and lower-byte access via BHE and BLE pins, placing I/O8–I/O15 or I/O0–I/O7 in high-impedance state respectively during partial reads/writes. Output drive strength meets VOH ≥ VCC − 0.4 V and VOL ≤ 0.4 V under specified load, with input thresholds VIH ≥ 0.8×VCC and VIL ≤ 0.4 V ensuring robust noise margin in mixed-signal environments.

Key Specifications

Pinout & Package

48-ball Fine-Pitch Ball Grid Array (FBGA) package, 6.0 mm × 8.0 mm footprint, 1.2 mm height, Pb-free, with thermal pad exposed on underside. Pin 1 located at corner A1 (top-left in standard orientation).

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, the CYK512K16SCAU-70BAXIT offers superior standby efficiency and plug-and-play asynchronous operation - critical for battery longevity and deterministic latency in portable medical and communication equipment.

Availability

CYK512K16SCAU-70BAXIT is available at Aetrix Electronics and suitable for cellular handset baseband, portable medical monitors, industrial HMI display controllers, and wireless sensor node gateways requiring stable component supply with guaranteed Pb-free compliance and industrial temperature support.

Supply support for CYK512K16SCAU-70BAXIT 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 qualification.

This device belongs to the MoBL® (More Battery Life) pseudo-SRAM product line, engineered specifically for portable electronics needing SRAM-like simplicity with DRAM-level density and battery-conscious power profiles.

FAQ

Does CYK512K16SCAU-70BAXIT require an external refresh controller?

No. As a pseudo-static RAM, it embeds self-refresh circuitry and operates asynchronously - no clock, no external refresh signals, and no refresh management firmware are needed. The device automatically maintains data integrity during standby and active modes using internal timers and power-gating logic, making it functionally identical to a true SRAM from the host MCU's perspective.

Can BHE and BLE be used simultaneously for full 16-bit access?

Yes. When both BHE and BLE are driven LOW, the full 16-bit data path (I/O0–I/O15) is enabled for read or write operations. The truth table confirms that "L H H L L L" (CE1=LOW, CE2=HIGH, WE=HIGH, OE=LOW, BHE=LOW, BLE=LOW) places all 16 I/O lines in active output or input state, supporting native 16-bit bus transactions without multiplexing.

What is the maximum operating frequency supported by the 70 ns version?

The 70 ns rating specifies minimum read cycle time (tRC), not clock frequency. Since it is asynchronous, there is no clock - maximum effective throughput depends on bus protocol overhead. At tRC = 70 ns, theoretical peak bandwidth is ~14.3 million 16-bit words per second (114 MB/s), assuming zero inter-cycle delay and ideal CE/OE timing alignment per the datasheet switching waveforms.

Is thermal pad connection mandatory for reliable operation?

Yes. The FBGA package includes an exposed thermal pad on the bottom surface, electrically connected to VSS. Per Cypress application guidance, this pad must be soldered to a PCB copper pour tied to the main ground plane to achieve rated θJC = 17 °C/W and prevent junction temperature exceedance above 125°C under sustained 11 mA ICC conditions at +85°C ambient.