BU24591 Datasheet, PDF (1/8 Pages) Rohm – 4bit 1chip micro-controller for CD-DA

Optical ICs
BU24591
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
(VDD=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°C)
Parameter
Symbol
Limits
Unit
Applied voltage
Power dissipation
VDD
−0.3 to +4.5
V
Pd
500 ^∗
mW
Operating temperature range
Topr
−25 to +75
°C
Storage temperature range
Tstg
−55 to +125
°C
∗ Reduced by 5mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions (Ta=25°C)
Parameter
Power supply voltage
Input "H" voltage
Input "L" voltage
Symbol Min. Typ. Max.
Unit
VDD
2.3
−
3.6
V
VIHS
0.75VDD
−
VDD
V
VILS
0
−
0.15VDD
V
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