BU24591
Optical ICs
4bit 1chip micro-controller for CD-DA
BU24591
The BU24591 is a 4bit 1chip micro-controller for CD-DA that integrates multiple I/O, such as 8bit 8-channel AD converter,
pulse width counter, two lines of SIO, and LCD controller driver with 80 segment (Max.). All LCD segment can be
switched into CMOS output by the program. These I/O achieves multi-function with few pins.
!
Applications
Portable CD-DA, CD radio cassette player
!
Features
1) Low voltage, high-speed operation
(V
DD
=2.3 to 3.6V at 4.4MHz)
2) Built-in 8bit 8-channel AD converter
3) Built-in pulse width counter
4) Built-in two lines of SIO
5) Built-in LCD controller driver with 20 segments, 4 common (With 3 common available)
6) All segment output of LCD controller driver can be switched into CMOS output by the program.
!
Absolute maximum ratings
(Ta=25擄C)
Parameter
Applied voltage
Power dissipation
Operating temperature range
Storage temperature range
Symbol
V
DD
Pd
Topr
Tstg
Limits
鈭?.3
to
+4.5
500
鈭?/div>
鈭?5
to
+75
鈭?5
to
+125
Unit
V
mW
擄C
擄C
鈭?/div>
Reduced by 5mW for each increase in Ta of 1
擄C
over 25擄C.
!
Recommended operating conditions
(Ta=25擄C)
Parameter
Power supply voltage
Input "H" voltage
Input "L" voltage
Symbol
V
DD
V
IHS
V
ILS
Min.
2.3
0.75V
DD
0
Typ.
鈭?/div>
鈭?/div>
鈭?/div>
Max.
3.6
V
DD
0.15V
DD
Unit
V
V
V
1/7
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