BU34675

Features:

1) Low-voltage, high-speed operation (V_DD = 2.3 to 5.5V at 4.4MHz).
2) Pulse width measurement counter on chip (for remote control reception).
3) SIO provided for communication with the DSP.
4) Seven-segment, four-common LCD controller / driver on chip.
5) All segments of the LCD controller / driver output can be switched to CMOS output using software.


Application

Portable CD-DA, CD / radio / cassette players


Pinout




Specifications

Parameter	Symbol	Limits	Unit
Maximum applied voltage	VDD	0.3 ~ + 7.0	V
Operating temperature	Topr	25 ~ +75
Power dissipation	Pd	500	mW
Storage temperature	Tstg	55 ~ + 125	°C

* Reduced by 5mW for each increase in Ta of 1 over 25


Description

The BU34675 is a compact 4-bit, single-chip microcontroller that includes all the I / O required for CD system control.

Circuits on the chip include a pulse width measurement counter (PWC), SIO, and an LCD controller / driver for a 28-segment display. The LCD segments of BU34675 can all be switched in software to CMOS output, and the extensive I / O allows many functions with a low pin count.