ADP5588XCPZ-X2-R7 - 18-GPIO Keypad Expander | Analog Devices
MPN： ADP5588XCPZ-X2-R7 ✓ 啟用中ADP5588XCPZ-X2-R7 概覽
An I/O port expander is an interface IC that increases the number of general-purpose input/output lines available to a host processor. The ADP5588 belongs to the GPIO expander and keypad-controller hierarchy within interface ICs. Designed for QWERTY-style mobile phones and other keypad-oriented systems, it offloads matrix scanning, key decoding, light sensing, and interrupt handling from a main application processor whose package-pin budget may be constrained.
The device can operate as an 18-GPIO port expander or as a 10 × 8 keypad matrix, allowing the same silicon to support both general-purpose line expansion and dedicated key-scanning duties. Its two light-sensor inputs provide additional peripheral integration in devices that need ambient-light measurement. Programmable pull-ups reduce external resistor requirements, while programmable interrupt behavior helps the host distinguish key presses, key releases, and general GPIO activity.
Communication with the host occurs through an I2C interface. The I2C register read autoincrement feature supports efficient sequential register access, which is particularly useful when firmware must scan a keypad, read multiple GPIO states, or update several configuration registers. The open-drain interrupt output supports a shared, wired interrupt arrangement, with pull-up handling required on the host side according to the device implementation.
Typical uses include mobile-phone keypad modules, handheld electronic equipment, industrial control panels, access-control keypads, alarm-system interfaces, and compact embedded systems requiring more input/output lines than the host controller can expose directly. It is also applicable to light-controlled user interfaces that need key scanning and analog light sensing within one small package.
Designers should allocate the I2C address, pull-up resistors, and interrupt pull-up in the host schematic, then verify that the chosen -X2 ordering option satisfies the product temperature and qualification requirements for the intended application. Although the web data identifies the 4 mm × 4 mm package and tape-and-reel packaging, a complete verified pin map, exact package designation, temperature range, pricing, and lifecycle classification were not included in the supplied records.
This product record consolidates the verified manufacturer features, distributor sourcing, functional positioning, and design guidance for the ADP5588XCPZ-X2-R7. It also clearly separates documented capabilities from unavailable pricing, pinout, compliance, and drop-in replacement data so engineers can make sourcing and design decisions without treating unverified assumptions as manufacturer specifications.
直接替換替代品，適用於 ADP5588XCPZ-X2-R7 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品ADP5588XCPZ-X2-R7 規格
| Product Type | 18-GPIO I/O port expander and keypad controller |
| GPIO Configuration | 18 GPIO ports configurable as GPIs, GPOs, or keypad rows and columns |
| Keypad Matrix | 10 × 8 matrix |
| Light Sensor Inputs | 2 inputs, C8 and C9 |
| Host Interface | I2C |
| 工作電源電壓 | 1.8 V to 3.0 V |
| I2C Register Read | Autoincrement supported |
| Interrupt Output | Open-drain |
| Key Interrupts | Key-press and key-release interrupts supported |
| GPI Interrupt | Programmable level |
| Pull-Ups | Programmable |
| Key Event Counter | Supported |
| Keypad Lock | Supported |
| Package Dimensions | 4 mm × 4 mm |
ADP5588XCPZ-X2-R7 4 mm × 4 mm 腳位配置指南
ADP5588XCPZ-X2-R7（4 mm × 4 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： ADP5588XCPZ-X2-R7.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADP5588XCPZ-X2-R7 適用於 6 應用s: Mobile Phone Keypad Interface, Industrial Keypad and Alarm Panel, Access-Control Keypad, Handheld Electronic Instrument, Light-Aware User Interface, Embedded Control and Alarm System.
Mobile Phone Keypad Interface
The ADP5588XCPZ-X2-R7 fits mobile-phone keypads because it combines an 18-GPIO expander with a dedicated 10 × 8 keypad matrix in a 4 mm × 4 mm package. The host processor can use the I2C interface for register access while the keypad logic handles scanning, decoding, key-press and key-release events, and programmable pull-ups. This integration can reduce host GPIO usage and firmware workload while operating from the documented 1.8 V to 3.0 V range.
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Industrial Keypad and Alarm Panel
The ADP5588XCPZ-X2-R7 is suitable for compact industrial keypad or alarm-system interfaces that require matrix scanning alongside additional digital lines. Its 10 × 8 matrix support, programmable pull-ups, key-event counter, keypad lock, and separate key-press and key-release interrupts provide useful event handling at the edge of the control panel. The I2C host interface and 1.8 V to 3.0 V operation suit low-voltage embedded control systems, subject to environmental qualification.
推薦
Access-Control Keypad
An access-control keypad benefits from the ADP5588XCPZ-X2-R7's dedicated matrix scanning and interrupt handling. The 10 × 8 matrix can identify pressed keys, while the key-event counter and distinct press and release interrupts give the controller a structured event stream. Programmable pull-ups reduce discrete input conditioning, and the 18-GPIO capability leaves additional lines for indicators, door-state inputs, or other panel functions in a 4 mm × 4 mm footprint.
推薦
Handheld Electronic Instrument
The ADP5588XCPZ-X2-R7 can extend a handheld instrument with a matrix keypad, additional GPIOs, and two light-sensor inputs without consuming all host-processor pins. Its 1.8 V to 3.0 V operating range is appropriate for battery-managed portable equipment, while the 4 mm × 4 mm package supports space-constrained layouts. The open-drain interrupt allows the instrument to remain asleep until a relevant key or GPIO event occurs, subject to the host's power-management architecture.
推薦
Light-Aware User Interface
The ADP5588XCPZ-X2-R7 fits user interfaces that combine a keypad with automatic light sensing. Its two dedicated light-sensor inputs, identified as C8 and C9 in the manufacturer datasheet, can supplement the 18-GPIO configuration when a product needs ambient-light awareness. Combining light sensing, keypad scanning, and digital line expansion in one 4 mm × 4 mm device can simplify a compact panel and preserve processor I/O for other functions.
推薦
Embedded Control and Alarm System
The ADP5588XCPZ-X2-R7 can serve as a compact interface between a host controller and a matrix keypad or alarm-system input panel. Eighteen configurable GPIOs provide room for alarm zones and status signals, while programmable interrupts allow the host to respond to changes without continuous polling. I2C register autoincrement supports efficient sequential access, and the 1.8 V to 3.0 V supply range supports modern embedded systems requiring a small, multifunction interface IC.
推薦
推薦產品摘要
工程參考資料，適用於 ADP5588XCPZ-X2-R7 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 4 mm × 4 mm surface-mount package |
| Brand | Analog Devices |
| GPIO Count | 18 |
| Keypad Matrix | 10 × 8 |
| Light Sensor Inputs | 2 |
| Host Interface | I2C |
| Operating Supply Voltage | 1.8 V to 3.0 V |
| Interrupt Output | Open-drain |
| I2C Register Read | Autoincrement supported |
| Keypad Functions | Key-press and key-release interrupts, event counter, and keypad lock |
主要差異化特點
- Combines matrix-keypad control with general-purpose expansion (對比Generic GPIO expander)
- Adds light sensing without requiring a separate dedicated interface (對比GPIO-only keypad expander)
- Reduces host interaction through event handling (對比Polling-only matrix keypad circuit)
設計說明
Place the ADP5588XCPZ-X2-R7 close to the keypad matrix and I2C host to minimize trace area on sensitive key-scan nodes. Follow the exact pin assignments and recommended layout in the official ADP5588 datasheet, Rev. D. Keep the 4 mm × 4 mm package's exposed thermal and electrical land pattern within the manufacturer's assembly guidelines, and route I2C and interrupt traces away from switching-node and motor-drive areas.
Design the 1.8 V to 3.0 V supply path so the ADP5588 remains within its documented operating range during startup, keypad scanning, and interrupt activity. I2C pull-ups should be calculated from the actual bus voltage, capacitance, and sink-current limits rather than copied from a generic 3.3 V design. Confirm the external pull-up arrangement and open-drain interrupt pull-up in the manufacturer datasheet before schematic release.
Do not assume that related ADP5588 order codes are automatically drop-in replacements. The supplied results identify ADP5588XCPZ-R7 but do not define the -X2 option or prove pin, temperature, qualification, and firmware compatibility. Verify the ordering table, package drawing, pinout, electrical limits, and register behavior for any proposed substitute before reusing an existing PCB footprint.
Use the documented I2C pull-up arrangement and keep the bus capacitance within the ADP5588 and host-controller limits. Because the interrupt output is open-drain, it can participate in a shared interrupt structure, but it requires appropriate pull-up treatment and a defined host wake or interrupt-handling routine. Validate press, release, and simultaneous-edge behavior in firmware rather than relying only on keypad row or column readings.
合規資訊
The supplied distributor record displays a RoHS-status field but does not provide the field's value. No verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals information was supplied.
