Analog Devices Inc. ADP5585ACPZ-01-R7

Overview

ADP5585ACPZ-01-R7 from Analog Devices is a 10-channel I/O expander with integrated keypad matrix decoder (6×5), programmable logic block, dual reset generators, and PWM generator. It operates from 1.65 V to 3.6 V, consumes as low as 1 μA in standby, and communicates via I²C Fast Mode Plus (up to 1 MHz). It serves as a system-level input management IC in space-constrained portable electronics.

For engineers reviewing the ADP5585ACPZ-01-R7 datasheet, ADP5585ACPZ-01-R7 pinout, ADP5585ACPZ-01-R7 application, or ADP5585ACPZ-01-R7 equivalent, key selection considerations include its 16-event FIFO for debounced key/GPI event buffering, configurable 100 kΩ/300 kΩ pull-up/pull-down resistors per I/O, open-drain interrupt output, and support for both keypad decode and GPIO expansion on shared pins.

Technical Context

The ADP5585ACPZ-01-R7 implements a dedicated keypad scan engine that drives column pins low while sensing row pins high, with built-in 70 µs debounce and two-scan-cycle validation for press/release detection. Its 10 multiconfigurable I/Os support simultaneous roles: row/column in 6×5 matrix, GPI with selectable interrupt level, GPO with push-pull or open-drain drive, and logic/PWM signal routing.

Internally, it integrates a 900–1100 kHz oscillator referenced for all timing functions, a 16-deep FIFO storing event ID + state bits, and register-mapped control over pin configuration, logic block inputs (LA/LB/LC), output (LY), reset trigger timing, and PWM source selection (internal or external).

Key Specifications

Pinout & Package

ADP5585ACPZ-01-R7 uses a 16-lead LFCSP package (3 mm × 3 mm, exposed pad), pin-compatible with the WLCSP variant but with different mechanical layout and thermal characteristics. The exposed pad is unconnected but recommended to be grounded for thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCA6424ARGJR and MAX7319ATL+, the ADP5585ACPZ-01-R7 delivers higher integration density (6×5 decode + 16-event FIFO + logic + dual reset), reducing total component count and firmware complexity in portable and industrial UI subsystems.

Availability

ADP5585ACPZ-01-R7 is available at Aetrix Electronics and suitable for smartphone front panels, industrial HMI systems, medical device control interfaces, and IR remote controls requiring stable component supply and long-term production continuity.

Supply support for ADP5585ACPZ-01-R7 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADP5585ACPZ-01-R7 belongs to Analog Devices' power and interface IC portfolio, designed specifically to reduce host processor load in portable and embedded human-interface applications through hardware-accelerated keypad scanning, event buffering, and configurable I/O logic.

FAQ

What is the primary function of the ADP5585ACPZ-01-R7 in a system architecture?

The ADP5585ACPZ-01-R7 serves as a dedicated I/O and keypad management IC that offloads matrix scanning, debouncing, event buffering, and logic generation from the main processor. It integrates a 6×5 keypad decoder, 16-event FIFO, programmable logic block, dual reset generators, and PWM engine - allowing the host MCU to remain in low-power states until an interrupt signals valid user input or system event. This architecture significantly reduces firmware complexity and power consumption in ADP5585ACPZ-01-R7-based designs.

How does the ADP5585ACPZ-01-R7 differ from the ADP5585ACBZ-01-R7 variant?

The ADP5585ACPZ-01-R7 and ADP5585ACBZ-01-R7 share identical functional capabilities including 6×5 keypad decode, 10 configurable I/Os, FIFO, logic block, and reset generators. Their difference lies solely in package type: ADP5585ACPZ-01-R7 uses a 16-lead LFCSP (3 mm × 3 mm), while ADP5585ACBZ-01-R7 uses a 16-ball WLCSP (1.59 mm × 1.59 mm). Both models configure RST/R5 as Row 5 to enable the 6-row matrix, and both support the same register map and I²C interface behavior.

Can the ADP5585ACPZ-01-R7 operate without an external reset signal?

Yes. When configured as Row 5 (as specified for ADP5585ACPZ-01-R7), the RST/R5 pin functions exclusively as a GPIO and keypad row - eliminating the dedicated reset input. In this mode, the only way to reset the ADP5585ACPZ-01-R7 is by dropping VDD below the undervoltage lockout threshold (1.2–1.4 V). Internal power-on reset (POR) and UVLO circuitry ensure reliable initialization at power-up, making external reset optional in space-constrained layouts.

What are the supported I²C address options for the ADP5585ACPZ-01-R7?

The ADP5585ACPZ-01-R7 defaults to I²C address 0x32 (7-bit). An alternate address option (0x30) is available only on the ADP5585ACPZ-03-R7 variant, not on ADP5585ACPZ-01-R7. Address selection is hardwired and cannot be changed via registers or pins on the ADP5585ACPZ-01-R7. This fixed addressing simplifies multi-device bus design when only one ADP5585ACPZ-01-R7 is present on the I²C segment.

Does the ADP5585ACPZ-01-R7 support both pull-up and pull-down resistors on the same I/O pin simultaneously?

No. Each I/O pin on the ADP5585ACPZ-01-R7 supports either a 100 kΩ or 300 kΩ internal pull-up resistor, or a 300 kΩ internal pull-down resistor - selected per pin via configuration registers. Simultaneous activation of pull-up and pull-down on a single pin is not supported and would create a conflict. The I/O structure allows only one biasing mode per pin at runtime, ensuring predictable voltage levels during keypad scanning or GPIO operation in ADP5585ACPZ-01-R7 implementations.