BU34381

Features:

1) High speed operations and low voltage. (VDD = 2.7 5.5V at 4.4MHz)
2) Internal 8-bit, 8-channel AD converter.
3) Internal pulse width counter.
4) Two internal serial input / outputs.
5) Internal 20-segment, 4-common LCD controller / driver. (usable with 3 commons)
6) All segments output by the LCD controller / driver are programmable for CMOS output.


Application

Portable CD-DA players, portable CD stereos


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 5.0 mW for each increase in Ta of 1 over 25


Description

The BU34381 is a 4-bit microcomputer designed for CD-DA players, and has a wide array of internal I / O components, BU34381 is including an 8-bit, 8-channel AD converter, pulse width counter (PWC), two serial I / O, and an LCD controller / driver capable of displaying up to 80 segments. All LCD segments are programmable for CMOS output. These I / O components allow for multifunction applications with a low number of pins.