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NXP Semiconductors PCA9564PW,118
- Part No.:
- PCA9564PW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PCA9564PW,118.pdf
- Description:
- IC CTRL PARALLEL/I2C BUS 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,007
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Product details
Overview
PCA9564PW,118 from NXP Semiconductors (formerly Philips Semiconductors) is a parallel-bus-to-I²C-bus controller IC enabling bidirectional protocol conversion between standard 8-bit parallel microcontrollers and the I²C serial bus. It operates as both master and slave, supports 2.3–3.6 V supply, features an internal 9 MHz oscillator, and delivers up to 360 kHz master-mode I²C clock rate - used in embedded systems requiring low-voltage I²C expansion without external timing components.
For engineers reviewing the PCA9564PW,118 datasheet, PCA9564PW,118 pinout, PCA9564PW,118 application, or PCA9564PW,118 equivalent, this device serves as a drop-in upgrade path for PCF8584-based designs needing higher-speed I²C operation, 5 V-tolerant I/Os, and reduced BOM count via integrated oscillator - critical when adding I²C ports to legacy 80C51-, 6800-, or Z80-based controllers.
Technical Context
The PCA9564PW,118 implements a full hardware I²C state machine with arbitration, START/STOP generation, clock stretching, and timeout detection - eliminating software overhead for bit-level I²C control. Its register-mapped parallel interface (D0–D7, A0/A1, RD/WR/CE) maps directly to standard microcontroller address/data buses, with status-driven interrupt signaling via INT.
It supports four operational modes (Master Transmitter, Master Receiver, Slave Receiver, Slave Transmitter) controlled through dedicated registers (I2CCON, I2CSTA, I2CDAT, I2CADR, I2CTO), where clock rate selection (CR2–CR0) sets master-mode SCL frequencies from 36 kHz to 881 kHz, and the 7-bit I2CADR register configures slave addressing - all accessible via parallel read/write cycles without I²C bus involvement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 3.6 V - enables direct interfacing with 3.3 V logic systems while maintaining 5 V tolerance on all I/O pins. |
| I²C Master Clock Rate | Up to 360 kHz - supports Fast-mode I²C (vs. PCF8584's 90 kHz), reducing transaction time for sensor or EEPROM access. |
| I²C Slave Clock Rate | Up to 400 kHz - fully compatible with standard Fast-mode I²C slaves without clock synchronization overhead. |
| Internal Oscillator | 9 MHz - eliminates need for external crystal or RC network, simplifying layout and lowering system cost. |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM - meets industrial-grade robustness requirements for board-level handling and field operation. |
| Parallel Interface | 8-bit multiplexed data bus (D0–D7), 2-bit address (A0/A1), RD/WR/CE control - matches standard 80C51-style memory-mapped peripheral access timing. |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial and automotive-adjacent embedded applications. |
Pinout & Package
PCA9564PW,118 is housed in a 20-pin TSSOP (SOT360-1) package with exposed pad for thermal enhancement. Pin functions are electrically identical to DIP/SO variants but optimized for surface-mount assembly and compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | Bi-directional parallel data bus | Transfers command/status/data between host CPU and I²C engine; 3-state outputs enable bus sharing. |
| A0, A1 | Register address select inputs | Selects among five internal registers (I2CSTA, I2CTO, I2CDAT, I2CADR, I2CCON) during read/write cycles. |
| RD, WR, CE | Control strobes | Enable synchronized parallel access: CE enables bus, RD initiates register read, WR initiates register write. |
| INT | Open-drain interrupt output | Signals completion of I²C events (START, STOP, byte transfer, error); requires external pull-up. |
| RESET | Active-low asynchronous reset | Clears internal registers and resets I²C state machine; no power-on reset circuit required. |
| SCL, SDA | Open-drain I²C bus lines | Direct connection to I²C bus; support standard/fast mode; require external pull-ups per I²C spec. |
| VDD, VSS | Power and ground | VDD accepts 2.3–3.6 V; VSS connects to system ground; exposed thermal pad must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware I²C state machine | Fully autonomous protocol handling - no firmware bit-banging needed for START/STOP/arbitration/timing compliance. |
| Multi-master capability | Automatic bus arbitration and collision detection - enables coexistence with other I²C masters on shared bus. |
| Configurable timeout protection | Programmable 7-bit timeout counter (I2CTO) prevents lockup on stuck SCL; resettable via software after error detection. |
| Master/slave dual-role operation | Single device handles both host-initiated transactions (master) and peripheral-resident responses (slave) - reduces component count in mixed-role systems. |
| 5 V tolerant parallel I/Os | Interfaces directly with 5 V microcontrollers without level shifters - preserves signal integrity and simplifies interconnect design. |
Applications
| Industrial Sensor Hub | Legacy MCU I²C Expansion |
|---|---|
Use Scenario: Central controller aggregates data from multiple I²C temperature, humidity, and pressure sensors in factory automation equipment. IC Role / Device Role / Timing Role: PCA9564PW,118 acts as master to initiate periodic reads from sensors and as slave to accept configuration commands from host PLC. Use Value: Enables deterministic polling at ≤360 kHz while isolating host CPU from I²C timing constraints - improving real-time responsiveness and reducing firmware complexity. | Use Scenario: Retrofitting I²C communication into an existing 80C51-based medical device without redesigning the main PCB. IC Role / Device Role / Timing Role: PCA9564PW,118 bridges the 80C51's parallel bus to a new I²C display module and EEPROM, using memory-mapped register access. Use Value: Eliminates need for external oscillator and level shifters; leverages existing 80C51 code structure with minimal driver updates - accelerating certification and time-to-market. |
| Multi-Port I²C Gateway | Low-Voltage Embedded Controller |
Use Scenario: Network appliance with dual independent I²C buses - one for system management (PMBus-compatible power supplies), another for front-panel peripherals. IC Role / Device Role / Timing Role: PCA9564PW,118 operates as two logically separate I²C controllers via software-configured register banks - each with independent address and timing. Use Value: Provides electrical isolation and protocol separation between buses while sharing a single parallel interface - reducing gate count vs. dual discrete controllers. | Use Scenario: Battery-powered handheld instrument requiring ultra-low-power I²C sensor interface with 3.3 V supply. IC Role / Device Role / Timing Role: PCA9564PW,118 serves as slave to host ARM Cortex-M0+ and master to analog front-end sensors, operating within 2.3–3.6 V range. Use Value: Internal oscillator and 5 V-tolerant I/Os allow direct connection to mixed-voltage peripherals - extending battery life by avoiding external regulators or translators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel-to-I²C interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCF8584T | Requires external 3.6864 MHz crystal; 4.5–5.5 V supply only; max 90 kHz master I²C clock; no internal timeout logic. | Designed for 5 V systems; lacks fast-mode I²C support; not suitable for 3.3 V or space-constrained designs. | Only viable if legacy 5 V board already uses PCF8584 footprint and timing budget allows slower I²C. |
| PCA9665BS,118 | Successor with enhanced register set, 1 MHz master clock, SMBus Alert response, and improved ESD (4 kV HBM); same TSSOP-20 package. | Supports higher-speed sensor networks and SMBus-compliant power management; requires updated driver firmware. | Preferred for new designs needing faster throughput or SMBus features; pin-compatible but register mapping differs. |
Compared with PCF8584T, PCA9564PW,118 delivers 4× faster I²C, lower voltage operation, and integrated oscillator - making it superior for modern 3.3 V embedded systems. Versus PCA9665BS,118, it offers proven stability and simpler firmware but lacks SMBus Alert and higher clock rates - ideal for cost-sensitive, non-SMBus applications.
Availability
PCA9564PW,118 is available at Aetrix Electronics and suitable for industrial sensor hubs, legacy MCU I²C expansion, multi-port I²C gateways, and low-voltage embedded controllers requiring stable component supply across long production lifecycles.
Supply support for PCA9564PW,118 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications - delivering high-reliability, long-lifecycle components with comprehensive technical support.
The PCA9564PW,118 belongs to NXP's legacy I²C interface controller product line, designed specifically to bridge parallel-bus microcontrollers to I²C peripherals while minimizing external components and supporting industrial temperature ranges.
FAQ
What is the primary function of the PCA9564PW,118?
The PCA9564PW,118 is a parallel-bus-to-I²C-bus controller that enables standard 8-bit microcontrollers without native I²C hardware to communicate with I²C peripherals. It handles all I²C protocol details - including START/STOP generation, arbitration, clock stretching, and ACK/NACK - via a memory-mapped parallel interface. The PCA9564PW,118 operates as both master and slave, supports Fast-mode I²C up to 360 kHz, and integrates a 9 MHz oscillator to eliminate external timing components.
Does the PCA9564PW,118 require an external crystal or oscillator?
No, the PCA9564PW,118 contains an internal 9 MHz oscillator used for all I²C timing functions - no external crystal, resonator, or RC network is required. This oscillator starts up within 500 µs after the ENSIO bit is set in the I2CCON register. The PCA9564PW,118 uses this clock to derive I²C SCL frequencies via programmable CR2–CR0 bits, supporting master-mode rates from 36 kHz to 881 kHz. External timing elements are unnecessary unless custom clock sources are needed for non-standard timing.
Can the PCA9564PW,118 operate with a 5 V microcontroller?
Yes, the PCA9564PW,118 has 5 V tolerant parallel I/O pins (D0–D7, A0, A1, RD, WR, CE, INT, RESET), allowing direct connection to 5 V microcontrollers without level-shifting circuitry. Its VDD supply remains at 2.3–3.6 V, so only the parallel interface is 5 V tolerant - the I²C bus lines (SCL/SDA) are open-drain and require external pull-ups to their respective bus voltage (typically 3.3 V or 5 V). This dual-voltage capability makes the PCA9564PW,118 ideal for upgrading legacy 5 V systems to low-voltage I²C interfaces.
How does the PCA9564PW,118 handle I²C bus errors such as stuck SCL?
The PCA9564PW,118 implements a configurable hardware timeout feature via the I2CTO register. When enabled (TE bit = 1), it monitors SCL transitions and triggers a bus error if SCL remains LOW longer than (I2CTO[6:0] + 1) × 113.7 µs. Upon timeout, it loads status 0x90 into I2CSTA, asserts INT, and releases SCL/SDA. Recovery requires the host CPU to read I2CSTA and issue a hardware RESET - no watchdog or external circuitry is needed. This built-in protection prevents system lockup during I²C faults, a key reliability feature absent in earlier controllers like the PCF8584.
Is the PCA9564PW,118 pin-compatible with the PCF8584?
No, the PCA9564PW,118 is not footprint-compatible with the PCF8584. Although functionally similar as parallel-to-I²C controllers, the PCA9564PW,118 uses a different pinout - for example, PCF8584 dedicates pins for external clock input and separate interrupt outputs, while PCA9564PW,118 consolidates functionality with an internal oscillator and single open-drain INT. The PCA9564PW,118 also omits bus monitor ("Snoop") and long-distance modes present in the PCF8584. Migration requires PCB layout changes and firmware adaptation, though register-level concepts (e.g., status, data, control) are retained for easier software porting.
PCA9564PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Programmable:
- Not Verified
- Protocol:
- I2C
- Function:
- Controller
- Interface:
- Parallel
- Standards:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Current - Supply:
- 6mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-TSSOP
- Grade:
- -
- Qualification:
- -
PCA9564PW,118 FAQ
1.How can I place an order for PCA9564PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9564PW,118 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 PCA9564PW,118 reliable?
The price and inventory of PCA9564PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9564PW,118 is usually 5 days.
3.What payment methods are accepted for PCA9564PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9564PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9564PW,118?
PCA9564PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9564PW,118 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 PCA9564PW,118?
For technical support, including PCA9564PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9564PW,118 requirements.
6.How does Aetrix verify that PCA9564PW,118 is sourced from the original manufacturer or authorized distributors?
All PCA9564PW,118 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 PCA9564PW,118 meets industry standards.
7.What is the process for return or replacement of PCA9564PW,118?
All PCA9564PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9564PW,118, 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 PCA9564PW,118 part is unused and in its original packaging.
Return procedure for PCA9564PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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