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Join our teamThe PCAL6534 is a 34-bit general-purpose I/O expander that provides remote I/O expansion for many microcontroller families via the Fast-mode Plus (Fm+) I2C-bus interface. The ultra-low-voltage interface allows for direct connection to a microcontroller operating down to 0.8 V.
The PCAL6534 includes level translating from the 1.65V to 5.5V I/O range and Agile I/O input latch, programmable output current, and integrated resistors. The benefits of the PCAL6534 are a wide voltage range for matching today’s lowest voltage FPGAs/processors and tiny package size, saving the cost and size of additional IOs in the processor. A GPIO expander such as the PCAL6534 can also simplify routing by pulling the I/Os for system management way from the processor, which may be densely packed with other critical functions.
The PCAL6534 is offered in a 2.6 mm x 3 mm VFBGA 42-pin package with 0.4 mm bump spacing.
Evaluation and Development Boards
Part Number | Bits | V Range | BW | Reset | Int | Description | Package Description | Type |
---|---|---|---|---|---|---|---|---|
PCAL6408A | 8 | 1.65 to 5.5 V | 400kHz | Dual VCC, selectable open-drain or push pull outputs | HVQFN-16, TSSOP-16, XQFN-16, XFBGA-16, X2QFN-16 | Agile IO | ||
PCA9574 | 8 | 1.1 to 3.6 V | 400kHz | maskable | Active low, 3 supplies for level translation, selectable open-drain | HVQFN-16, TSSOP-16 | Standard | |
PCAL6416A | 16 | 1.65 to 5.5 V | 400kHz | Dual VCC, selectable open-drain or push pull outputs | TSSOP-24, X2QFN-24, HWQFN-24, BGA-24 | Agile IO | ||
PCA9539R | 16 | 2.3 to 5.5 V | 400kHz | "R" version resets I2C-bus state machine | HVQFN-24, TSSOP-24 | Standard | ||
PCAL6524 | 24 | 0.8 to 5.5 V | 1MHz | Read all interrupts without clear, device ID, SW reset | QFN-32, UFBGA-32 | Agile IO | ||
PCAL6534 | 34 | 0.8 to 5.5 V | 1MHz | Read all interrupts without clear, device ID, SW reset | VFBGA-42 | Agile IO | ||
PCA9698 | 40 | 2.3 to 5.5 V | 1MHz | Output enable, selectable open-drain | TSSOP-56, HVQFN-56 | Standard |