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Home > Products > Integrated Circuits (ICs) > Interface > I/O Expanders

Infineon Technologies CY8C9560A-24AXIT

Name: CY8C9560A-24AXIT
Brand: Infineon Technologies
SKU: CY8C9560A-24AXIT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY8C9560A-24AXIT

Manufacturer:: Infineon Technologies

Category:: I/O Expanders

Package:: 100-LQFP

Datasheet:: CY8C9560A-24AXIT.pdf

Description:: IC XPNDR 100KHZ I2C 100TQFP

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Product details

Overview

CY8C9560A-24AXIT from Cypress Semiconductor is a 60-bit I/O expander IC with integrated EEPROM and 16 independently configurable 8-bit PWM outputs, operating as dual I²C slave devices (I/O expander + serial EEPROM). It supports up to 128 device addressing via Extendable Soft Addressing (A0–A6), features interrupt-driven input change detection, and stores user-defined port/PWM defaults in nonvolatile memory for automatic restoration at power-up - used in embedded system board management and LED dimming control.

For engineers reviewing the CY8C9560A-24AXIT datasheet, CY8C9560A-24AXIT pinout, CY8C9560A-24AXIT application, or CY8C9560A-24AXIT equivalent, key selection criteria include I²C clock stretching support, WD pin-based EEPROM write disable, 10 mA source / 25 mA sink drive capability per GPIO, and register-level configuration of quasi-bidirectional I/O modes.

Technical Context

The CY8C9560A implements two independent I²C slave interfaces: one for multi-port I/O register access (7-bit address 0x40–0x7F) and another for EEPROM byte read/write (7-bit address 0xA0–0xAF). Its control unit parses command bytes (e.g., 01h–07h) to execute POR default storage, factory reset, or PWM reconfiguration.

Each of its 60 GPIOs maps to GPort 0–7 with configurable drive modes (pull-up/down, open-drain, strong drive, high-Z), inversion, direction, and PWM assignment via dedicated registers (1Ch–23h, 28h–2Fh). The internal watchdog timer and POR circuit ensure deterministic initialization without external reset components.

Key Specifications

Parameter	Value and Actual Design Meaning
I/O Count	60-bit expandable GPIO across eight ports (GPort 0–7), enabling dense peripheral interfacing on resource-constrained hosts.
PWM Outputs	16 × 8-bit PWM channels (PWM0–PWM15), each selectable from six clock sources (1.5 MHz, 93.75 kHz, 32 kHz, 24 MHz, dividers), supporting LED dimming and motor control.
EEPROM Size	27 Kbyte user-accessible EEPROM with 2-byte addressing, allowing persistent storage of calibration data, board IDs, or fault logs.
I²C Compatibility	Electrically compatible with SMBus but requires I²C master clock stretching support - not SMBus timeout-compliant.
Drive Strength	10 mA source / 25 mA sink per pin in strong-drive mode; configurable pull-up/pull-down eliminates need for external bias resistors.
Interrupt Logic	Dedicated INT pin asserts on input level change or PWM state transition; maskable per-pin via Interrupt Mask Register (19h).
Address Pins	A0 fixed + A1–A6 optional (up to 7 bits), enabling 128 unique I²C addresses on shared bus without external jumpers.

Pinout & Package

Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
Vdd	Power supply	Core and I/O supply (2.7–5.5 V); decoupling required within 10 mm of pin.
Vss	GND	Digital ground reference for all I/O and internal logic.
SCL	I²C clock input	Open-drain input requiring external pull-up; supports up to 400 kHz standard-mode I²C.
SDA	I²C data I/O	Open-drain bidirectional line; shares bus with other I²C slaves using clock stretching.
INT	Interrupt output	Active-low open-drain signal indicating input change or PWM event; requires external pull-up.
WD	EEPROM write disable	Hardware lock: high = blocks all EEPROM writes, overriding software configuration registers.
A0–A6	I²C address inputs	A0 fixed; A1–A6 configurable - unused pins become GPIOs (GPort 1/2), maximizing pin utility.
GPort 0–7	GPIO/PWM terminals	60 total I/O lines; each individually assignable as input, output, quasi-bidirectional, or PWM output via register 1Ch/28h.

Key Features

Feature	Design Value
User-default EEPROM storage	Port direction, drive mode, and PWM settings saved to EEPROM and auto-restored at power-on - eliminates host initialization overhead.
Extendable Soft Addressing	Configurable A1–A6 pin usage allows dynamic trade-off between I²C address space and available GPIO count.
Per-pin drive mode control	Seven modes (pull-up, pull-down, open-drain high/low, strong drive fast/slow, high-Z) set via Drive Mode Registers (1Dh–23h) - no external components needed.
Register-based PWM configuration	Period (2Ah), pulse width (2Bh), clock source (2Ch), and enable (2Dh) controlled per-PWM channel - enables synchronized multi-channel timing.
Interrupt status/mask granularity	Separate Interrupt Status (10h–17h) and Mask (19h) registers per port allow selective edge-triggered notification without polling.

Applications

LED Dimming Control

Board-Level Monitoring

Use Scenario: Driving 16 RGB LED strings in consumer audio equipment with independent brightness control.

IC Role / Device Role / Timing Role: I/O expander providing 16 × 8-bit PWM outputs synchronized to internal 93.75 kHz clock for flicker-free dimming.

Use Value: Eliminates need for discrete PWM controllers and reduces host MCU GPIO usage by 16 pins while maintaining precise duty-cycle resolution.

Use Scenario: Detecting chassis intrusion, fan failure, and voltage rail faults in industrial PLC backplanes.

IC Role / Device Role / Timing Role: Configurable GPIO input with interrupt-on-change (INT pin) and EEPROM-stored fault history logging.

Use Value: Enables autonomous fault capture during power loss; host reads stored error codes from EEPROM after reboot without real-time polling.

Embedded System Configuration

Multi-Device I²C Bus Expansion

Use Scenario: Storing board revision ID, calibration coefficients, and boot configuration flags in medical diagnostic equipment.

IC Role / Device Role / Timing Role: Nonvolatile EEPROM storage accessible via I²C, with hardware write-disable (WD pin) for field-programmed security.

Use Value: Prevents accidental overwrites during firmware updates; ensures configuration integrity across 10,000+ write cycles.

Use Scenario: Adding 60 GPIOs across 128 addresses on a single I²C bus in telecom line-card management systems.

IC Role / Device Role / Timing Role: Multi-drop I²C slave with A0–A6 address flexibility and clock-stretching tolerance for reliable arbitration.

Use Value: Scales I/O without bus contention; supports hot-plug detection via INT-driven notification without host polling latency.

Equivalent & Alternatives

The following parts are listed as comparable options for similar I/O expansion applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PCA9555DWR	16-bit I/O expander only; no PWM, no EEPROM; 400 kHz I²C; no clock stretching required.	Limited to basic GPIO extension without timing-critical functions like LED dimming or nonvolatile config storage.	Select when only digital I/O expansion is needed and host lacks clock-stretching support.
TCA6424ARGJR	24-bit I/O expander with interrupt, but no PWM or EEPROM; supports 1 MHz I²C; includes reset pin.	Requires external microcontroller for PWM generation and separate EEPROM for configuration persistence.	Choose for high-speed I²C buses where deterministic timing and minimal external components outweigh feature gaps.

Compared with PCA9555DWR and TCA6424ARGJR, CY8C9560A-24AXIT integrates PWM timing, nonvolatile configuration, and scalable addressing - reducing BOM count and firmware complexity in systems requiring coordinated I/O, dimming, and field-programmable settings.

Availability

CY8C9560A-24AXIT is available at Aetrix Electronics and suitable for industrial HMI panels, medical device front-panels, and telecom line-card management systems requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for CY8C9560A-24AXIT 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 programmable system-on-chip solutions for embedded control, connectivity, and sensing applications.

The CY8C95xxA family targets board-level I/O consolidation in space-constrained systems, delivering integrated GPIO expansion, PWM generation, and EEPROM storage to reduce host MCU peripheral burden and simplify system-level design.

FAQ

Does CY8C9560A-24AXIT support standard-mode (100 kHz) and fast-mode (400 kHz) I²C?

Yes, it supports both standard-mode (100 kHz) and fast-mode (400 kHz) I²C operation. However, it mandates clock stretching support from the I²C master during EEPROM write operations and register accesses that trigger internal processing - unlike SMBus-compliant devices.

How is the 27 Kbyte EEPROM organized and accessed?

The EEPROM uses 2-byte addressing (AHI/ALO) spanning 0x0000–0x69FF (27,647 bytes). It is accessed as a separate I²C slave (base address 0xA0) and supports byte-write and sequential-read operations. Writes crossing 64-byte boundaries cause automatic clock stretching.

Can unused address pins (A1–A6) be repurposed as GPIOs?

Yes - pins A1–A6 are multiplexed. When not used for I²C addressing, they function as general-purpose I/Os assigned to GPort 1 or GPort 2, increasing usable GPIO count without additional package pins.

What happens to I/O states during power-on reset?

At power-on, the device executes internal POR and loads factory defaults (pulled-up inputs) unless user defaults have been stored in EEPROM. If valid user defaults exist, they override factory settings and configure all ports, drive modes, and PWMs automatically.

CY8C9560A-24AXIT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 100-LQFP

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Number of I/O:: 60

Interface:: I2C

Interrupt Output:: Yes

Features:: EEPROM, POR, PWM, WDT

Output Type:: Open Drain

Current - Output Source/Sink:: 10mA, 25mA

Clock Frequency:: 100 kHz

Voltage - Supply:: 3V ~ 5.25V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 100-TQFP (14x14)

CY8C9560A-24AXIT FAQ

1.How can I place an order for CY8C9560A-24AXIT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY8C9560A-24AXIT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CY8C9560A-24AXIT reliable?

The price and inventory of CY8C9560A-24AXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C9560A-24AXIT is usually 5 days.

3.What payment methods are accepted for CY8C9560A-24AXIT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C9560A-24AXIT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY8C9560A-24AXIT?

CY8C9560A-24AXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY8C9560A-24AXIT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CY8C9560A-24AXIT?

For technical support, including CY8C9560A-24AXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C9560A-24AXIT requirements.

6.How does Aetrix verify that CY8C9560A-24AXIT is sourced from the original manufacturer or authorized distributors?

All CY8C9560A-24AXIT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY8C9560A-24AXIT meets industry standards.

7.What is the process for return or replacement of CY8C9560A-24AXIT?

All CY8C9560A-24AXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C9560A-24AXIT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CY8C9560A-24AXIT part is unused and in its original packaging.

Return procedure for CY8C9560A-24AXIT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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