AR1100-I/SS Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip AR1100-I/SS is a resistive touchscreen controller IC in a 20-pin SSOP package, supporting both 3.3 V and 5 V supply voltages for broad system compatibility. Provides analog-to-digital conversion of touch coordinates with a serial interface output. Available from stock worldwide with fast shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- AR1100-I/SS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.0800(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Resistive touchscreen controller with 12-bit ADC for precise X/Y touch coordinate detection
- Dual supply voltage operation at 3.3 V and 5 V enabling use across mixed-voltage embedded systems
- 20-pin SSOP package with serial interface output for direct connection to microcontroller UART or SPI
- Integrated calibration and filtering reduces host MCU software burden for touchscreen HMI designs
Applications
The AR1100-I/SS is designed for HMI panels, industrial touch terminals, and handheld instruments that use 4-wire resistive touchscreens requiring accurate 12-bit coordinate conversion. Its 3.3 V and 5 V dual-supply compatibility makes it suitable for integration into both low-power embedded systems and standard 5 V microcontroller platforms. Consumer appliances, medical device interfaces, and point-of-sale terminals benefit from its compact 20-pin SSOP footprint and simplified serial interface.
Specifications
| Manufacturer Package Code | SSOP-20 |
| Factory Lead Time | 6Weeks |
| YTEOL | 3 |
| Additional Feature | ALSO OPERATES AT 5V SUPPLY |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Voltage-Max | 3.465V |
| Supply Voltage-Min | 3.135V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| uPs/uCs/Peripheral ICs Type | RESISTIVE TOUCH SCREEN CONTROLLERS |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for AR1100-I/SS:
suggested
4, 5 & 8 wire analog resistive touch controller USB & RS232 communication
Frequently Asked Questions
What supply voltages does the AR1100-I/SS support and how does this affect touchscreen controller selection?
The AR1100-I/SS operates at both 3.3 V and 5 V supply voltages, allowing engineers to use a single controller SKU across designs powered by either 3.3 V microcontrollers or legacy 5 V systems. This dual-voltage compatibility reduces inventory complexity when developing product families with different host MCU platforms while maintaining consistent 12-bit touch coordinate resolution across operating conditions.
For a 4-wire resistive touchscreen panel in an industrial HMI, how does the AR1100-I/SS interface with the host microcontroller?
The AR1100-I/SS uses a serial interface that connects directly to a microcontroller UART or SPI port, transmitting 12-bit X and Y coordinate data after each touch event. This eliminates the need for a separate ADC on the host MCU and reduces GPIO usage to the serial data lines plus an interrupt pin, simplifying firmware integration in 20-pin SSOP packages for space-constrained industrial HMI boards.
When would an engineer choose the AR1100-I/SS over integrating touchscreen ADC channels directly in a microcontroller?
Engineers choose the AR1100-I/SS when the host MCU lacks dedicated resistive touch ADC channels or when offloading touch sampling at rates up to several hundred Hz would consume too many MCU cycles. The dedicated controller handles 4-wire resistive panel drive and 12-bit analog sampling independently, freeing the host processor for application tasks and ensuring consistent touch accuracy regardless of MCU load, which is critical in industrial control panels requiring 260°C reflow-compatible SSOP assembly.
Related Guides
How to Choose a BAS70 Schottky Diode for Signal Clamping: Selection Guide
A practical BAS70KFILM and BAS70-family Schottky diode selection guide for signal clamping, RF detection, leakage, and topology choices.
Jul 4, 2026
AMC1202DWVR Design Guide for Isolated Current Sensing
Practical AMC1202DWVR design guide covering shunt sizing, isolation layout, input filtering, ADC scaling, and sourcing choices.
Jul 4, 2026
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.7300 | $2.73 |
| 50+ | $2.2900 | $114.50 |
| 100+ | $2.2700 | $227.00 |
| 125+ | $2.2600 | $282.50 |
| 250+ | $2.2100 | $552.50 |
| 1000+ | $2.0800 | $2080.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”