Synaptics Fs7605 Touch Fingerprint Sensor With Pureprint-tm- Top Page

In a world where a laptop wakes from sleep in under a second, a fingerprint sensor cannot lag. The FS7605 is engineered for "invisible speed."

Author: AI Research Division (Technical White Paper) Date: April 13, 2026

For high-security doors (server rooms, R&D labs), the PurePrint anti-spoofing ensures that a security guard cannot be tricked by a silicon thumb. The "TOP" protocol ensures the lock doesn't get hacked via a man-in-the-middle attack. In a world where a laptop wakes from

The FS7605 is optimized for battery-powered devices with three power modes:

| Mode | Current | Condition | |------|---------|------------| | Active (capture + match) | 22 mA (typical) | Full operation | | Idle (waiting for finger) | 1.2 mA | Periodic scanning at 5 Hz | | Sleep | 8 µA | No finger detection, RTC wakeup | The most critical component of the FS7605 is

Wake-on-finger uses a low-power capacitive proximity sensor (integrated) drawing 15 µA, enabling always-on detection.

How does it stack up against the Qualcomm 3D Sonic (ultrasonic) or the Goodix optical sensors used in smartphones? 2026 For high-security doors (server rooms

| Feature | Synaptics FS7605 | Ultrasonic (Qualcomm) | Optical (Under-Display) | | :--- | :--- | :--- | :--- | | Spoof Detection | PurePrint (AI/Analog) | Ultrasonic Impedance | RGB Light (Easier to fool) | | Wet Finger Rejection | Excellent (High) | Excellent | Poor (Light scatters) | | Power Consumption | Ultra-Low (15µW sleep) | High | Medium | | Surface Material | Glass/Metal/Plastic | Required flexible OLED | Only Transparent Glass | | Liveness Standard | TOP (Hardware) | Software Layer | Software Layer |

Conclusion: The FS7605 is the "tank" of the industry. It trades off aesthetic "under-display" placement (though it can go under a bezel) for raw, uncompromised security and reliability.

The most critical component of the FS7605 is the suffix: "PurePrint-TM- TOP." In the biometric industry, the term "liveness detection" separates toys from tools. Without it, a hacker can lift a latent fingerprint from a glass table, create a 2D silicon or gelatin replica, and unlock a device.

PurePrint-TM- TOP is Synaptics' proprietary AI-driven anti-spoofing technology. Here is what the acronym breaks down to in practical terms: