Description
This document describes the specifications of Atmel’s AT77C104B fingerprint sensor dedicated to PDA, cellular and smartphone applications. Based on FingerChip thermal technology, the AT77C104B is a linear sensor that captures fingerprint images by sweeping the finger over the sensing area. This product embeds true hardware-based 8-way navigation and click functions.

FEATUREs
• Thermal Sensitive Layer Over a 0.35 µm CMOS Array
• Image Zone: 0.4 x 11.6 mm
• Image Array: 8 × 232 = 1856 Pixels
• Pixel Pitch: 50 × 50 µm = 500 dpi Resolution
• On-chip 8-bit Analog to Digital Converter
• Serial Peripheral Interface (SPI) - 2 Modes:
   – Fast Mode at 16 Mbps Max for Imaging
   – Slow Mode at 200 kbps Max for Navigation and Control
• Die Size: 1.5 × 15 mm
• Operating Voltage: 2.3 to 3.6V
• Operating Temperature Range: -40° C to 85° C
• Finger Sweeping Speed from 2 to 20 cm/Second
• Low Power: 4.5 mA (Image Acquisition), 1.5 mA (Navigation), <10 µA (Sleep Mode)
• Hard Protective Coating (>4 Million Sweeps)
• High Protection from Electrostatic Discharge
• Small Form Factor Packaging

APPLICATIONs
• Scrolling, Menu and Item Selection for PDAs, Cellular or Smartphone Applications
• Cellular and Smartphones-based Security (Device Protection, Network and ISP Access, E-commerce)
• Personal Digital Agenda (PDA) Access
• User Authentication for Private and Confidential Data Access
• Portable Fingerprint Acquisition