Overview
The PCA9698BS,118 from NXP USA Inc. is a 40-bit parallel input/output (I/O) port expander designed for I²C-bus applications. This device is part of the Fast-mode Plus (Fm+) family, offering higher frequency operation up to 1 MHz and support for more densely populated bus configurations. The PCA9698BS is organized into 5 banks of 8 I/Os, providing flexible and extensive I/O expansion capabilities. It features an open-drain interrupt output pin, an Output Enable pin, and a hardware reset pin, making it versatile for various applications requiring advanced I/O management.
Key Specifications
| Parameter | Description |
|---|---|
| Number of I/Os | 40 bits, organized in 5 banks of 8 I/Os |
| Interface | I²C-bus, SMBus compatible |
| Supply Voltage | 2.3 V to 5.5 V |
| Output Current Capability | Source: 10 mA, Sink: 25 mA per output |
| Total Package Load | Up to 1 A |
| Frequency | Up to 1 MHz (Fast-mode Plus) |
| Package Type | HVQFN56 (56 terminals, 8 × 8 × 0.85 mm) |
| Operating Temperature | -40 °C to +85 °C |
| Reset and Interrupt | Hardware reset pin (RESET), open-drain interrupt output pin (INT) |
Key Features
- Each I/O port can be configured as an input or output.
- Output ports can be programmed as totem-pole or open-drain.
- Logic states can change at either the Acknowledge (bank change) or the Stop Command (global change).
- Input ports can be masked to prevent interrupt generation.
- I/O data logic state can be inverted when read by the system master.
- Output Enable pin (OE) for 3-stating any I/O selected as output and for PWM control of LEDs.
- ‘GPIO All Call’ command for programming multiple Advanced GPIOs simultaneously.
- SMBus Alert feature for wired-AND signal formation.
- Internal Power-On Reset (POR) and hardware reset pin.
Applications
- LED lighting and display systems, where the ability to drive multiple LEDs directly is beneficial.
- Industrial control systems requiring extensive I/O expansion.
- Automotive systems, particularly those needing robust and high-frequency I/O management.
- Consumer electronics, such as smart home devices and appliances, that require flexible I/O configurations.
- Medical devices and equipment that need reliable and configurable I/O interfaces.
Q & A
- What is the PCA9698BS used for?
The PCA9698BS is used for 40-bit parallel input/output (I/O) port expansion in I²C-bus applications.
- What is the maximum frequency of operation for the PCA9698BS?
The PCA9698BS operates up to 1 MHz in Fast-mode Plus.
- How many I/O banks does the PCA9698BS have?
The PCA9698BS has 5 banks of 8 I/Os each.
- What is the supply voltage range for the PCA9698BS?
The supply voltage range is from 2.3 V to 5.5 V.
- Can the output ports be configured as open-drain or totem-pole?
Yes, the output ports can be programmed as either open-drain or totem-pole.
- What is the purpose of the Output Enable (OE) pin?
The OE pin is used to 3-state any I/O selected as output and can also be used for PWM control of LEDs.
- Does the PCA9698BS support SMBus Alert feature?
Yes, it supports the SMBus Alert feature for forming a wired-AND signal.
- How does the PCA9698BS handle power-on reset?
The device has an internal Power-On Reset (POR) and a hardware reset pin.
- Can multiple PCA9698BS devices be programmed simultaneously?
Yes, the ‘GPIO All Call’ command allows programming multiple Advanced GPIOs at the same time.
- What is the operating temperature range for the PCA9698BS?
The operating temperature range is from -40 °C to +85 °C.
