HT1621B多功能LCD驱动器

FeaturesHT1621B多功能LCD驱动器

Operating voltage: 2.4V~5.2V

Built-in 256kHz RC oscillator

External 32.768kHz crystal or 256kHz frequency

source input

Selection of 1/2 or 1/3 bias, and selection of 1/2 or

1/3 or 1/4 duty LCD applications

Internal time base frequency sources

Two selectable buzzer frequencies (2kHz/4kHz)

Power down command reduces power consumption

HT1621B多功能LCD驱动器

Built-in time base generator and WDTHT1621B多功能LCD驱动器

Time base or WDT overflow output

8 kinds of time base/WDT clock sources

324 LCD driver

Built-in 324 bit display RAM

3-wire serial interface

Internal LCD driving frequency source

Software configuration feature

Data mode and command mode instructions

R/W address auto increment

Three data accessing modes

VLCD pin for adjusting LCD operating voltage

HT1621: 48-pin SSOP package

HT1621B: 48-pin DIP/SSOP/LQFP package

HT1621D: 28-pin SKDIP package

HT1621G: Gold bumped chip

General Description

Absolute Maximum Ratings

Supply Voltage ...........................VSS0.3V to VSS+5.5V Storage Temperature............................50o

C to 125o

C

Input Voltage..............................VSS0.3V to VDD+0.3V Operating Temperature...........................25o

C to 75o

C

Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability