HT45F23 データシートの表示（PDF） - Holtek Semiconductor

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HT45F23

8-Bit Flash MCU with Op Amps & Comparators

Holtek Semiconductor 

HT45F23/HT45F43

8-Bit Flash MCU with Op Amps & Comparators

· 12-bit Audio DAC output

· PFD/Buzzer for audio frequency generation

· Internal 2.4V/3.3V LDO

· Low voltage reset function

· Low voltage detect function

· 16-pin NSOP, 20/24-pin SSOP package types

· The two devices share the same functional features but differ in their internal operational

characteristics as shown in the following table:

Device

Op-Amp Quiescent

Current

Op-amp Gain

Bandwidth

LDO 3.3V Current Op-amp/Comparator

Consumption

Offset Calibration

HT45F23

200mA typ.

2MHz typ.

50mA typ.

Ö

HT45F43

1.5mA typ.

5kHz typ.

7mA typ.

¾

General Description

The HT45F23 and HT45F43 are Flash Memory Tinypower A/D type 8-bit high performance RISC

architecture microcontrollers. The HT45F43 device has low power internal operational amplifiers

making it more suitable for power sensitive products. The HT45F23 device has a higher gain

bandwidth product than the HT45F43 at the expense of power consumption making it more suitable

for higher frequency applications.

Offering users the convenience of Flash Memory multi-programming features, these devices also

include a wide range of functions and features. Other memory includes an area of RAM Data Memory

as well as an area of EEPROM memory for storage of non-volatile data such as serial numbers,

calibration data etc.

Analog features include an integrated multi-channel Analog to Digital Converter, dual Pulse Width

Modulation outputs, dual Operational Amplifiers , dual Comparators , one internal 2.4V or 3.3V LDO

(Low Drop Out) for voltage regulator and a 12-bit DAC for voice output application, communication

with the outside world is catered for by including fully integrated SPI or I2C interface functions, two

popular interfaces which provide designers with a means of easy communication with external

peripheral hardware. Protective features such as an internal Watchdog Timer, Low Voltage Reset and

Low Voltage Detector coupled with excellent noise immunity and ESD protection ensure that reliable

operation is maintained in hostile electrical environments.

A full choice of HXT, LXT, ERC, HIRC and LIRC oscillator functions are provided including a fully

integrated system oscillator which requires no external components for its implementation. The

unique Holtek TinyPower technology also gives the devices extremely low current consumption

characteristics, an extremely important consideration in the present trend for low power battery

powered applications. The usual Holtek MCU features such as power down and wake-up functions,

oscillator options, programmable frequency divider, etc. combine to ensure user applications require a

minimum of external components.

The inclusion of flexible I/O programming features, Time-Base functions along with many other

features ensure that the devices will find excellent use in applications such as electronic metering,

environmental monitoring, handheld instruments, household appliances, electronically controlled

tools, motor driving, home security systems related to PIR products, CO detector, Smoke detector and

many others.

Rev. 1.20

8

September 15, 2011

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