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PDF AT77C101B Data sheet ( Hoja de datos )
| Número de pieza | AT77C101B | |
| Descripción | Thermal Fingerprint Sensor | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Sensitive Layer Over a 0.8 µm CMOS Array
• Image Zone: 0.4 x 14 mm = 0.02" x 0.55"
• Image Array: 8 x 280 = 2240 pixels
• Pixel Pitch: 50 µm x 50 µm = 500 dpi
• Pixel Clock: up to 2 MHz Enabling up to 1780 Frames per Second
• Die Size: 1.7 x 17.3 mm
• Operating Voltage: 3 V to 5.5 V
• Naturally Protected Against ESD: > 16 kV Air Discharge
• Power Consumption: 20 mW at 3.3 V, 1 MHz, 25°C
• Operating Temperature Range: -40°C to +85°C
• Resistant to Abrasion: >1 Million Finger Sweeps
• Chip-on-Board (COB), Chip-on-Board (COB) with Connector, or 20-lead Ceramic DIP
Available for Development, with Specific Protective Layer
Applications
• PDA (Access Control, Data Protection)
• Cellular Phones, SmartPhones (Access e-business)
• Notebook, PC-add on (Access Control, e-business)
• PIN Code Replacement
• Automated Teller Machines, POS
• Building Access
• Electronic Keys (Cars, Home,...)
• Portable Fingerprint Imaging for Law Enforcement
• TV Access
Figure 1. FingerChip™ Packages
Chip-on-Board Package
with connector
Chip-on-Board Package
(COB)
Thermal
Fingerprint
Sensor with
0.4 mm x 14 mm
(0.02" x 0.55")
Sensing Area
and
Digital Output
(On-chip ADC)
AT77C101B
FingerChip™
Actual size
Sweep your finger
to make life easier
Rev. 2150B–BIOM–09/03
1
1 page  
AT77C101B FingerChip™
Description
The AT77C101B is part of the Atmel FingerChip monolithic fingerprint sensor family for
which no optics, no prism and no light source are required.
The AT77C101B is a single-chip, high-performance, low-cost sensor based on tempera-
ture physical effects for fingerprint sensing.
The AT77C101B has a linear shape, which captures a fingerprint image by sweeping
the finger across the sensing area. After capturing several images, Atmel proprietary
software can reconstruct a full 8-bit fingerprint image.
The AT77C101B has a small surface combined with CMOS technology, and a Chip-on-
Board package assembly. These facts contribute to a low-cost device.
The device delivers a programmable number of images per second, while an integrated
analog-to-digital converter delivers a digital signal adapted to interfaces such as an EPP
parallel port, a USB microcontroller or directly to microprocessors. No frame grabber or
glue interface is therefore necessary to send the frames. These facts make AT77C101B
an easy device to include in any system for identification or verification applications.
Table 1. Absolute Maximum Ratings(1)
Parameter
Symbol
Comments
Value
Unit
Positive supply voltage
Temperature stabilization power
VCC
TPP
GND to 6.5
GND to 6.5
V
V
Front plane
FPL
GND to VCC
V
Digital input voltage
RST PCLK
GND to VCC
V
Storage temperature
Tstg
-50 to +95
°C
Lead temperature (soldering, 10 seconds)
Tleads
Do not solder
Forbidden
°C
Note: 1. Absolute maximum ratings are limiting values, to be applied individually, while other parameters are within specified operat-
ing conditions. Long exposure to maximum ratings may affect device reliability.
Table 2. Recommended Conditions Of Use
Parameter
Symbol
Positive supply voltage
Front plane
VCC
FPL
Digital input voltage
Digital output voltage
Digital load
Analog load
Operating temperature range
Maximum current on TPP
CL
CA
RA
Tamb
ITPP
Comments
Must be grounded
Not connected
I grade
Min Typ Max
3 V 5 V 5.5 V
GND
CMOS levels
CMOS levels
50
-40°C to +85°C
0 100
Unit
V
V
V
V
pF
pF
kΩ
°C
mA
2150B–BIOM–09/03
5
5 Page 
Figure 6. Output Enable
Output enable
OE
Data output
Do0-3, De0 -3
tZDATA
Hi-Z
AT77C101B FingerChip™
Data output
tDATAZ
Hi-Z
Figure 7. No Data Change
PCLK
tNOOE
OE
Note: OE must not change during TNOOE after the PCLK falls. This is to ensure that the output drivers of the data are not driving cur-
rent, so as to reduce the noise level on the power supply.
2150B–BIOM–09/03
11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet AT77C101B.PDF ] | |
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