5419A–BIOM–01/05
FingerChip
®
Thermal
Fingerprint
Sweep Sensor,
Hardware
Based
Navigation and
Click Functions,
Extended I/O
range (1.8-3.3V)
AT77C105A
Preliminary
Sweep your finger
to make life easier
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
I/O Voltage: 1.65 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
Description
Atmel’s AT77C105A fingerprint sensor is dedicated to PDA, cellular and smartphone
applications. Based on FingerChip thermal technology, the AT77C105A 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 as
well, as enabling elimination of mechanical joystick devices.
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
Chip-on-board Package
Actual size of sensor