ADP5587ACPZ-1-R7 - 18-GPIO I/O Expander | Analog Devices
MPN: ADP5587ACPZ-1-R7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.7548 | $0.75 |
| 10 | $0.7548 | $7.55 |
| 100 | $0.7548 | $75.48 |
| 500 | $0.7548 | $377.40 |
| 1,000 | $0.7548 | $754.80 |
ADP5587ACPZ-1-R7 Overview
An I/O expander is an interface IC that increases the number of general-purpose input/output lines available to a host processor. The ADP5587 supports mobile keypad architectures by combining configurable GPIOs with keypad row and column functions, reducing the number of host pins required for physical key matrices. Its position in the hierarchy is GPIO expander → keypad controller → interface IC → semiconductor.
The ADP5587 family is intended for QWERTY-type phone designs and similar human-interface systems. Its GPIO expansion capability allows the host to scan controls, read switch states, drive indicator or control lines, and manage keypad rows and columns through the serial interface. The I2C interface with auto-increment supports efficient register access, while the compact 24-LFCSP-WQ package supports space-constrained mobile equipment. The verified data does not provide complete electrical limits, pin-level functions, or timing values, so those parameters remain marked for data completion rather than inferred.
Typical applications include mobile phone keypads, portable navigation devices, handheld terminals, compact consumer equipment, and other products that need more host-controlled I/O than the processor exposes directly. The ADP5587 is particularly useful when a design needs both general-purpose digital lines and keypad scanning in one device. Compared with a pure GPIO expander, it adds keypad-oriented functions; compared with a larger host MCU, it can reduce processor pin count and centralize human-interface I/O.
Designers should verify the package-specific pinout, I2C address configuration, voltage limits, and electrical timing against the manufacturer datasheet before layout. The compact WQ package also requires careful PCB escape routing and thermal assessment according to the manufacturer’s recommended land pattern. This page combines verified distributor availability and product descriptions with structured application guidance and clearly identifies parameters that require datasheet confirmation.
Drop-in alternatives for ADP5587ACPZ-1-R7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADP5587ACPZ-1-R7 (same form factor and footprint) — differing in Package, Interrupt Output, Product Type, GPIO Configuration, Host Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADP5587ACPZ-R7
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →ADP5587ACBZ-R7
✅ Drop-In✓ In Stock
$0.7548 / Unit
View Datasheet →ADP5588ACPZ-R7
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →PCA9539AHF
✅ Drop-In📋 Reference alternative (not in catalog)
PCA9539APW
✅ Drop-In📋 Reference alternative (not in catalog)
PCA9539PW/Q900
✅ Drop-In✓ In Stock
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View Datasheet →ADP5587ACPZ-1-R7 Specifications
| Product Type | 18-GPIO I/O expander and QWERTY keypad controller |
| GPIO Count | 18 GPIO |
| Keypad Matrix | 8 keypad matrix |
| I2C Interface | I2C with auto-increment |
| I2C Maximum Frequency | 400 kHz |
| Nominal Supply Operation | 3.6 V operation |
| Package | 24-LFCSP-WQ (4 mm × 4 mm) |
| GPIO Configuration | Configurable as GPI, GPO, and keypad rows or columns |
| Application Target | QWERTY-type mobile phones |
| I/O Expansion Role | Expands host-processor GPIO resources |
| Keypad Support | Key scanning and decoding |
| Host Interface | Serial I2C control interface |
ADP5587ACPZ-1-R7 24-lfcsp-wq (4 mm × 4 mm) Pin Configuration Guide
Pin configuration for ADP5587ACPZ-1-R7 (24-lfcsp-wq (4 mm × 4 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ADP5587ACPZ-1-R7.
Refer to the datasheet for full pin configuration.
Typical Applications
ADP5587ACPZ-1-R7 is suitable for 6 applications: Mobile Phone QWERTY Keypad, Portable Navigation Device, Handheld Terminal Keypad, Consumer Remote Control Panel, Compact Industrial Control Head, Battery-Powered Portable Equipment.
Mobile Phone QWERTY Keypad
The ADP5587ACPZ-1-R7 is designed for QWERTY-type mobile phones where a main processor has limited GPIO resources. Its 18 GPIOs and 8-keypad matrix can support row and column scanning while preserving host pins for other functions. Place the device beside the keypad connector, connect the I2C control bus, and configure the relevant lines as keypad GPIOs according to the manufacturer register definitions. The verified 400 kHz I2C capability supports compact serial control, while the 4 mm × 4 mm package helps limit board area. Verify voltage limits, pin mapping, and key-debounce behavior in the datasheet.
Recommended
Portable Navigation Device
A portable navigation product can use ADP5587ACPZ-1-R7 to consolidate front-panel keys, hold switches, and indicator controls into one serial interface. The 18-GPIO capacity allows ordinary digital inputs and outputs to coexist with an 8-keypad matrix, reducing direct processor pin demand. The I2C interface with auto-increment is useful when the controller must update several registers during key events or panel-state changes. In a compact handheld layout, the 24-LFCSP-WQ 4 mm × 4 mm package simplifies routing compared with a larger discrete switch interface. The complete supply range and timing limits remain to be confirmed from the manufacturer documentation.
Recommended
Handheld Terminal Keypad
ADP5587ACPZ-1-R7 fits handheld terminals that combine a numeric or matrix keypad with auxiliary digital controls. Its keypad-oriented GPIOs can scan multiple rows and columns, while remaining GPIOs can handle configurable input or output functions. The device communicates with the terminal processor through I2C, making it suitable for designs that prefer a compact bus-connected interface over many direct host connections. Use the manufacturer’s recommended PCB footprint and verify pull-up, decoupling, and signal-routing requirements for the selected power and I/O conditions. The verified source does not provide complete pin-level timing, so firmware and hardware should be validated together.
Recommended
Consumer Remote Control Panel
A consumer remote or control panel can use ADP5587ACPZ-1-R7 to manage a keypad matrix and additional digital status lines through I2C. The 18-GPIO architecture provides more flexibility than a simple fixed-purpose scanner, allowing selected lines to operate as GPIOs or keypad rows and columns. This is useful where the enclosure includes several buttons, mode indicators, or auxiliary switches. The 400 kHz interface can provide a practical control path for a host processor, while the small WQ package supports dense portable assemblies. Confirm the package pinout and configuration registers before layout because the verified data does not enumerate individual pin functions.
Recommended
Compact Industrial Control Head
ADP5587ACPZ-1-R7 can serve as a local human-interface controller in a compact industrial control head that contains a keypad, status inputs, and output indicators. The device’s serial I2C control path can reduce the number of connections between the operator panel and a central controller, while its 18 GPIOs support both matrix scanning and auxiliary digital functions. The verified source does not establish industrial temperature, isolation, EMC, or automotive qualification, so those requirements must be checked separately. Use careful I2C layout and current-limited output design, and review the datasheet for all electrical constraints before deploying the device in a controlled environment.
Recommended
Battery-Powered Portable Equipment
The ADP5587ACPZ-1-R7 is appropriate for battery-powered portable equipment when a design needs to consolidate keypad and auxiliary I/O without adding a separate host GPIO matrix. Its 18-GPIO resource can reduce processor pin count, while the compact 4 mm × 4 mm package leaves board area for battery management and radio or processing functions. The verified material identifies 3.6 V operation and a 400 kHz I2C interface, but it does not provide the complete current-consumption or sleep-mode figures. Therefore, battery-life calculations require the manufacturer electrical characteristics. Confirm low-power behavior, address configuration, and wake-up requirements in the datasheet.
Recommended
Recommended Products Summary
Engineering reference data for ADP5587ACPZ-1-R7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADP5587ACPZ-R7 | ADP5587ACBZ-R7 | ADP5588ACPZ-R7 | PCA9539AHF |
|---|---|---|---|---|---|
| Package | 24-LFCSP-WQ (4 mm × 4 mm) | 24-LFCSP-WQ (4 mm × 4 mm) | 24-LFCSP-WQ (4 mm × 4 mm) | 24-LFCSP-WQ (4 mm × 4 mm) | 24-LFCSP-WQ (4 mm × 4 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | NXP Semiconductors |
| Product Function | 18-GPIO I/O expander and QWERTY keypad controller | Functional equivalent; exact function details not quantified | Functional equivalent; exact function details not quantified | Functional equivalent; exact function details not quantified | I/O expander functional equivalent |
Key Differentiators
- Combines GPIO expansion with keypad-controller functionality (vs PCA9539AHF)
- 18-GPIO resource allocation (vs ADP5588ACPZ-R7)
- Serial keypad and control integration (vs PCA9539APW)
Design Notes
Use the manufacturer’s recommended land pattern for the 24-LFCSP-WQ 4 mm × 4 mm package and confirm pin 1 orientation before routing. Keep I2C traces short, route them away from noisy switching nodes, and place pull-up resistors at the locations recommended by the system’s bus topology. The verified data does not include a complete pinout or land pattern, so do not infer pad numbering from the package name alone.
Treat 3.6 V as the verified nominal operating description, not as a complete supply range. Verify minimum and maximum voltage, input current, I/O levels, and power-off behavior in the Analog Devices datasheet before connecting the part to a host rail. Ensure the host I2C pull-up voltage does not exceed any verified input or supply limit, especially in mixed-voltage portable systems.
Do not substitute a part solely because a distributor labels it a functional equivalent. ADP5587ACPZ-R7, ADP5587ACBZ-R7, ADP5588ACPZ-R7, and PCA9539-family devices require comparison of package pins, supply limits, address selection, GPIO behavior, keypad functions, and firmware register compatibility. A valid replacement must match the existing PCB footprint and electrical conditions, not only the general product category.
For keypad applications, separate keypad traces from sensitive analog or high-current paths where practical, maintain consistent grounding, and account for return currents when arranging the matrix. Validate debounce and scanning firmware after layout because trace capacitance, pull-up strength, and switching noise can affect I2C and key-event behavior. The verified data identifies keypad scanning but does not provide complete timing or debounce parameters.
Compliance Information
The supplied verified data does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Compliance status must be confirmed from the manufacturer’s current product documentation or supply-chain declarations.
