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ATMXT1664S1-CU
Microchip Technology
IC SENSOR MAXTOUCH
33635 Pcs New Original In Stock
Capacitive Touch
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(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (405 Ratings)
ATMXT1664S1-CU
Product Overview
1266290
DiGi Electronics Part Number
ATMXT1664S1-CU-DGManufacturer
Microchip Technology
ATMXT1664S1-CU
Description
IC SENSOR MAXTOUCHInventory
33635 Pcs New Original In Stock
Capacitive Touch
Quantity
Minimum 1
Minimum 1
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Warranty & Returns
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ATMXT1664S1-CU Technical Specifications
Category
Interface, Sensor, Capacitive Touch
Packaging
-
Series
maXTouch™
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Datasheet & Documents
HTML Datasheet
ATMXT1664S1-CU-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
5A002A1
HTSUS
8542.31.0001
Additional Information
Other Names
Q7675810
Standard Package
1
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
I appreciate the careful packaging that minimizes the risk of damage during transit, reflecting their commitment to quality.
de desembre 02, 2025
They are very considerate of urgent needs, with swift logistics adjustments when necessary.
de desembre 02, 2025
Very pleased with the fast shipping and attentive customer support.
de desembre 02, 2025
Their consistent product quality and thoughtful packaging give me confidence in every order.
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Frequently Asked Questions (FAQ)
Can the ATMXT1664S1-CU reliably replace an older maXTouch™ controller like the ATMXT224E in a high-humidity industrial touch panel design, and what layout or firmware changes are needed to avoid false touches?
While the ATMXT1664S1-CU offers improved noise immunity and higher channel count than the ATMXT224E, direct drop-in replacement isn’t guaranteed due to differences in electrode sensing algorithms and baseline tracking. In high-humidity environments, the ATMXT1664S1-CU’s enhanced moisture rejection helps, but you must re-tune the touch thresholds and guard/shield routing in your PCB layout—specifically increasing guard ring width and isolating sensor traces from power planes. Additionally, update the firmware configuration using Microchip’s mXT Configuration Tool to adjust the 'Moisture Rejection' and 'Baseline Update Rate' settings; failure to do so may result in erratic touch behavior or missed detections.
What are the key reliability risks when using the ATMXT1664S1-CU in automotive infotainment systems exposed to wide temperature swings and EMI from nearby motors or displays?
The ATMXT1664S1-CU is rated for commercial temperature ranges (0°C to +70°C), making it unsuitable for under-hood or exterior automotive applications without additional thermal management. Even in cabin-use cases, radiated EMI from LCD backlights or brushless motors can couple into touch electrodes, causing ghost touches. To mitigate this, implement a solid ground plane beneath all sensor traces, use differential sensing where possible, and add RC filtering (e.g., 100Ω + 10pF) at the sensor inputs. Also, enable the device’s built-in spread-spectrum clocking and dynamic frequency hopping features via firmware—these significantly reduce susceptibility to narrowband interference common in automotive environments.
How does the ATMXT1664S1-CU compare to the Cypress (Infineon) CAP1298 for capacitive touch button arrays in consumer appliances, especially regarding power consumption and self-capacitance vs. mutual-capacitance sensing?
The ATMXT1664S1-CU uses mutual-capacitance sensing, which provides superior multi-touch performance and better noise immunity compared to the CAP1298’s self-capacitance approach—making it ideal for complex interfaces like sliders or 2D touchpads. However, the CAP1298 consumes less standby current (~5 µA vs. ~15 µA for the ATMXT1664S1-CU in sleep mode), which may matter in battery-powered appliances. If your design only needs simple button detection and ultra-low power is critical, the CAP1298 could be preferable. But for robust performance in noisy kitchen environments (e.g., near induction cooktops), the ATMXT1664S1-CU’s differential sensing and advanced filtering offer a more reliable user experience despite slightly higher power draw.
What PCB design constraints must be followed when routing sensor lines for the ATMXT1664S1-CU to prevent crosstalk and ensure signal integrity on a 4-layer board with limited spacing?
To maintain signal integrity with the ATMXT1664S1-CU on a densely packed 4-layer board, keep all sensor traces on the same layer (preferably Layer 1) with a continuous ground plane on Layer 2 directly beneath them—avoid splitting this plane under sensor routes. Maintain a minimum trace-to-trace spacing of 3x the trace width (e.g., 0.15 mm trace → 0.45 mm gap) to minimize crosstalk. Never route high-speed signals (USB, clocks) parallel to sensor lines; if crossing is unavoidable, do so at 90 degrees. Also, terminate unused sensor pins with 1 MΩ to ground to prevent floating inputs, which can cause erratic baseline drift and false detections during operation.
Is the ATMXT1664S1-CU suitable for waterproof touch interfaces in outdoor kiosks, and how should the overlay material and sealing method be chosen to avoid compromising touch sensitivity?
The ATMXT1664S1-CU supports thick-overlay sensing (up to 10 mm of glass or 5 mm of acrylic) and includes firmware-configurable gain settings, making it viable for sealed outdoor kiosks—but success depends heavily on overlay selection and sealing technique. Use hydrophobic-coated glass (e.g., Gorilla Glass with oleophobic layer) and avoid silicone gaskets that trap moisture at the electrode edges, as this can create conductive paths mimicking touch events. Instead, opt for compression seals with desiccant pockets. Calibrate the touch thresholds post-assembly using Microchip’s production-line tuning scripts, and enable the ‘Wet Tracking’ feature to distinguish water droplets from intentional touches. Without these measures, rain or condensation may trigger false inputs even if the IC itself is functional.
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ATMXT1664S1-CU CAD Models
Microchip Technology ATMXT1664S1-CU PCB symbols & footprints
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