NXP Semiconductors PCA9663B,118

Overview

The PCA9663B,118 from NXP Semiconductors is a single-master, 3-channel Fast-mode Plus (Fm+) I²C-bus controller with parallel-bus interface, supporting up to 1 Mbit/s per channel, 4352-byte per-channel buffer (13,056 bytes total), and 3.3 V core/5.5 V I/O-tolerant operation. It serves as a high-throughput protocol converter for CPU offload in data-intensive industrial control and LED matrix systems.

For engineers reviewing the PCA9663B,118 datasheet, PCA9663B,118 pinout, PCA9663B,118 application, or PCA9663B,118 equivalent, key selection considerations include Fm+ timing compliance, triple-channel autonomous sequence execution, JTAG boundary-scan support, trigger-synchronized frame refresh, and 3-level reset architecture - all validated for −40 °C to +85 °C operation in LQFP48 packaging.

Technical Context

The PCA9663B,118 integrates a trimmed 12.0 MHz oscillator and 156 MHz PLL to generate precise I²C clocking and interval timing for sequence looping, eliminating external crystal requirements. Its three independent Fm+ channels operate with full SCL clock stretching support and individual 4352-byte buffers enabling multi-slave transactions without CPU intervention.

Error handling is hierarchical: transaction-level STATUSx_[n] registers report slave NACKs (RSN/WSN), write-data NACKs (WDN), and activity states (TA/TR); channel-level CHSTATUS flags bus errors; and controller-level CTRLSTATUS provides global fault visibility. Interrupt masking at all three levels allows granular response tuning via INT pin assertion.

Key Specifications

Pinout & Package

Package: LQFP48 (7 mm × 7 mm × 1.4 mm, SOT313-2). All VDD pins (7, 18, 30, 40, 44, 48) must be externally tied together; all VSS pins (8, 19, 29, 35, 39, 43, 47) require common ground connection; VDD(IO) (pin 24) sets I²C logic thresholds independently of core supply.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C-bus controller applications.

Compared with PCA9665B,118, the PCA9663B,118 omits SMBus-specific features to reduce gate count and cost, while retaining identical timing, buffering, and trigger capabilities; versus TCA9665RTER, it trades VQFN footprint for LQFP manufacturability and adds JTAG - making PCA9663B,118 optimal for test-critical industrial boards requiring proven NXP qualification.

Availability

The PCA9663B,118 is available at Aetrix Electronics and suitable for industrial sensor aggregation, LED matrix display control, and embedded I²C expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PCA9663B,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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in interface, power, and security ICs.

The PCA9663B,118 belongs to NXP's advanced I²C-bus controller product line, designed specifically to offload high-volume serial data transfers from host processors in demanding industrial and display systems.

FAQ

What is the maximum I²C data rate supported by the PCA9663B,118?

The PCA9663B,118 supports Fast-mode Plus (Fm+) operation at up to 1 Mbit/s per channel. This is achieved using open-drain I²C I/Os with 30 mA sink capability on SCL/SDA, enabling faster rise times and higher throughput than standard Fast-mode (400 kbit/s). The internal PLL generates precise clocking to maintain timing compliance at this rate across all three channels simultaneously.

How does the PCA9663B,118 handle I²C slave NACK conditions during autonomous sequences?

The PCA9663B,118 reports NACKs at transaction level in STATUSx_[n] registers (RSN for read, WSN for write, WDN for write-data) and allows configurable error handling via REMSK/WEMSK bits in INTMSK registers. When masked, the controller skips the failed slave and continues the sequence; when unmasked, it asserts INT and halts. This behavior is fully hardware-managed without CPU intervention.

Can the PCA9663B,118 operate with mixed-voltage I²C slaves (e.g., 3.3 V and 5 V devices on the same bus)?

Yes - the PCA9663B,118's I²C I/Os are 5 V tolerant, and VDD(IO) (pin 24) sets the logic threshold independently. By setting VDD(IO) to 5 V, the device safely interfaces with 5 V slaves; setting it to 3.3 V optimizes noise margin for 3.3 V slaves. Each channel's SDA/SCL pins share this single VDD(IO) reference, so mixed-voltage operation requires external level-shifting per bus segment.

What is the role of the TRIG input on the PCA9663B,118, and how is it used in practice?

The TRIG input on the PCA9663B,118 initiates a new frame transmission on the selected channel upon a rising edge. In practice, it synchronizes I²C data bursts to external timing sources - for example, triggering LED matrix frame updates on video vertical sync pulses or initiating sensor reads at precise PLC scan intervals - ensuring deterministic, jitter-free operation in real-time systems.

Does the PCA9663B,118 require an external crystal or oscillator?

No - the PCA9663B,118 integrates a factory-trimmed 12.0 MHz internal oscillator with ±1 % accuracy and a 156 MHz PLL. These generate all required clocks for I²C timing, interval timers, and internal logic, eliminating external crystals, capacitors, or clock generators and reducing BOM cost and board area.