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Multimedia ICs
PS / 2 Mouse Controller
BU9206
The BU9206 is a PS / 2 mouse communication controller for PCs. This processor shapes waveforms and counts sig-
nals from the mouse rotary encoder as the mouse is moved, to provide two-way communication between mouse and
PC system.
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Applications
PC mouse
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Features
1) For PS / 2 mouse.
2) Compatible with a wide range of input signals, be-
cause it automatically sets the input threshold levels
for the X and Y direction, corresponding to the out-
put level of the rotary encoder inside the mouse.
3) CMOS process enables low current consumption.
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Absolute maximum ratings (Ta = 25°C)
Parameter
VDD
Pd
Topr
Tstg
– 0.3 ~ + 7.0
1000
*
– 25 ~ + 75
– 55 ~ + 125
V
Symbol Limits Unit
mW
°C
°C
VIN – 0.3 ~ VDD + 0.3 V
VOUT – 0.3 ~ VDD + 0.3 V
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Reduced by 10 mW for each increase in Ta of 1°C over 25°C.
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
Input voltage
Output voltage
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Recommended operating conditions (Ta = 25°C)
Parameter
VDD 4.5 5.0 5.5 V VDD
VIH2 0.4
*
VDD —VDD V SCLK, SDATA
VIL2 0 — 0.16
*
VDD V SCLK, SDATA
VAUP 0.3
*
VDD — 0.8
*
VDD V XA, XB, YA, YB
VALP 0 — 0.48
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VAUP V XA, XB, YA, YB
SWR, SWL, TEST2B, TEST1B,
TEST0, RESETB
VIH1 0.8
*
VDD —VDD V
SWR, SWL, TEST2B, TEST1B,
TEST0, RESETB
VIL1 0 — 0.2
*
VDD V
Symbol Min. Typ. Max. Unit Application pin
Power supply voltage
H input voltage 1
H input voltage 2
L input voltage 1
L input voltage 2
XY input H voltage
XY input L voltage