SANYO LC82102W, LC82102 Datasheet
CMOS LSI
Ordering number : EN*5155
91195HA (OT) No. 5155-1/5
Preliminary
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Image-Processing LSI
for Fax, Copier and OCR Products
LC82102, LC82102W
Overview
The LC82102 and LC82102W convert analog video
signals from CCD or contact image sensors to highquality binary video data. The LC82102/W converts the
input analog data to multi-valued data and uses twodimensional filtering and an error diffusion technique that
produces high-quality images to produce a two-valued
image. Finally, the LC82102 reduces the image in the
main and subsidiary scan directions. The LC82102
requires absolutely no external memory since it limits the
number of pixels processed to 2040 per line. This LSI can
implement the image processing used by FAX, copier and
OCR products.
Features
• Number of pixels processed: 2040 pixels/line
• Processing speed: 500 ns/pixel maximum (when the
CLKIN input frequency is 32 MHz)
• Built-in 8-bit A/D converter (includes a sensor signal
delay adjustment function)
• Built-in 6-bit D/A converter for setting the A/D
converter high reference potential
• Sensor drive circuit (supports CCD and all CIS types)
• Digital clamp (single-point clamp, even/odd clamp)
• Distortion correction (white correction: 8-pixel
averaging correction, black correction: black correction
subtraction data setting)
• Gamma correction (supports user-defined curves)
• Simple binary-conversion processing (fixed threshold
level, density-adaptive threshold level)
• Intermediate processing error diffusion (64 levels)
• Image reduction (thinning, fine black line retaining, fine
white line retaining)
• Single-voltage 5 V supply and low power due to CMOS
process fabrication
Package Dimensions
unit: mm
3159-QFP64E
unit: mm
3190-SQFP64
SANYO: SQFP64
[LC82102W]
[LC82102]
SANYO: QIP64E
Specifications
Absolute Maximum Ratings at Ta = 25°C, GND = 0 V
Allowable Operating Ranges at Ta = –30 to +70°C, GND = 0 V
DC Characteristics at Ta = –30 to +70°C, GND = 0 V, VDD= 4.5 to 5.5 V
Analog Characteristics
No. 5155-2/5
LC82102, LC82102W
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
DD
max –0.3 to +7.0 V
Maximum I/O voltages V
I
, VOmax –0.3 to VDD+ 0.3 V
Allowable power dissipation Pd max Ta ≤ 70°C 350 mW
Operating temperature Topr –30 to +70 °C
Storage temperature Tstg –55 to +125 °C
Soldering conditions
Hand soldering: 3 seconds 350 °C
Reflow soldering: 10 seconds 235 °C
Parameter Symbol Conditions min typ max Unit
Supply voltage V
DD
4.5 5.5 V
Input voltage V
IN
0 V
DD
V
Parameter Symbol Conditions min typ max Unit
Input high level voltage V
IH
2.2 V
Input low level voltage V
IL
0.8 V
Input leakage current I
L
VIN= VDD, V
SS
–25 +25 µA
Output high level voltage V
OHIOH
= –3 mA 2.4 V
Output low level voltage V
OL
IOL= 3 mA 0.4 V
Output leakage current I
L
For high-impedance output –100 +100 µA
Current drain I
DD
CLKIN = 32 MHz 40 70 mA
Parameter Symbol Conditions min typ max Unit
[D/A Converter]
Resolution 6 bit
Internal resistance 5.0 kΩ
[A/D Converter] when ADREFL = 0 V, and the ATAP potential is 4.2 V
Resolution 8 bit
Linearity error ±1 LSB
Differential linearity error ±1 LSB
Internal resistance 300 Ω
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