ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC XPNDR 400KHZ I2C 28QFN
- Series：-
- Mfr：Semtech Corporation
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of I/O：16
- Interface：I2C
- Interrupt Output：Yes
- Features：Keypad Controller, LED Output, POR
- Output Type：Open Drain, Push-Pull
- Current - Output Source/Sink：8mA, 15mA
- Clock Frequency：400 kHz
- Voltage - Supply：1.425V ~ 3.6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：28-UFQFN Exposed Pad
- Supplier Device Package：28-QFN-UT (4x4)
- Grade：-
- Qualification：-
Download product information
Overview
The SX1509BIULTRT is a 16-channel ultra-low voltage General Purpose Input/Output (GPIO) expander manufactured by Semtech. It operates with a core supply voltage ranging from 1.425V to 3.6V, while dual independent I/O banks support voltages between 1.2V and 3.6V. The device features a standard 400kHz I²C interface and provides up to 15mA output sink current per pin. It integrates an on-chip LED driver supporting 256-step PWM intensity control, blinking, and breathing functions, alongside a keypad scanning engine capable of monitoring up to 64 keys. Packaged in a QFN-UT-28 format, it includes hardware reset capabilities and mask-programmable interrupts.
Feature Summary
- Integrated LED Driver for enhanced lighting control including intensity, blinking, and breathing modes
- On-Chip Keypad Scanning Engine supporting up to 8x8 matrix configurations
- Dual Independent I/O Rails enabling direct level shifting between different voltage domains
- Mask-Programmable Interrupts with configurable edge sensitivity
Applications
- Cell phones and PDAs
- MP3 players and digital cameras
- Notebooks and GPS units
- Battery-powered handheld equipment
Procurement Notes
Verify the specific ordering suffix against the manufacturer's latest documentation to ensure package and tape-and-reel specifications match your assembly requirements. Confirm RoHS compliance status through official datasheets or component test reports prior to finalizing procurement orders.
Selection Notes
Select this component when expanding I/O capacity for microcontrollers with limited ports in low-voltage environments. Ensure the application requires independent voltage levels for I/O banks or utilizes the integrated LED and keypad functionalities to reduce external component count.
Part Context
This part belongs to the SX1508B/SX1509B family of world’s lowest voltage level-shifting GPIOs. The SX1509BIULTRT specifically offers 16 channels compared to the 8-channel SX1508B variant. Both share identical architectural features regarding LED driving and keypad scanning engines within the same PerSe™ product line.
Replacement Considerations
SX1508BIULTRT serves as a functional substitute if only 8 channels are required, sharing identical electrical characteristics and package footprints relative to channel count.
